
SN74HC4060DBR
Active14-STAGE ASYNCHRONOUS BINARY COUNTERS AND OSCILLATORS 16-SSOP -40 TO 85
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SN74HC4060DBR
Active14-STAGE ASYNCHRONOUS BINARY COUNTERS AND OSCILLATORS 16-SSOP -40 TO 85
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Technical Specifications
Parameters and characteristics commom to parts in this series
Specification | SN74HC4060DBR | 74HC4060 Series |
---|---|---|
Count Rate | 33 MHz | 33 - 35 MHz |
Direction | Up | Up |
Grade | - | Automotive |
Logic Type | Binary Counter | Binary Counter |
Mounting Type | Surface Mount | Surface Mount, Through Hole |
Number of Bits per Element | 14 | 14 |
Number of Elements [custom] | 1 | 1 |
Operating Temperature [Max] | 85 °C | 85 - 125 °C |
Operating Temperature [Min] | -40 °C | -55 - -40 C |
Package / Case | 16-SSOP | 16-SOIC, 16-TSSOP, 16-DIP, 16-SSOP, 16-SOIC (0.209", 5.30mm Width) |
Package / Case | - | 0.154 - 7.62 mm Width |
Package / Case | - | 0.173 " |
Package / Case | - | 4.4 mm |
Package / Case [y] | 0.209 in | 0.209 in |
Package / Case [y] | 5.3 mm | 5.3 mm |
Qualification | - | AEC-Q100 |
Reset | Asynchronous | Asynchronous |
Supplier Device Package | 16-SSOP | 16-SOIC, 16-TSSOP, 16-PDIP, 16-SSOP, 16-SO |
Timing | Asynchronous | Asynchronous |
Trigger Type | Negative Edge | Negative Edge |
Voltage - Supply [Max] | 6 V | 6 V |
Voltage - Supply [Min] | 2 V | 2 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
74HC4060 Series
14-Stage Asynchronous Binary Counters And Oscillators
Part | Mounting Type | Count Rate | Voltage - Supply [Max] | Voltage - Supply [Min] | Number of Bits per Element | Supplier Device Package | Number of Elements [custom] | Operating Temperature [Min] | Operating Temperature [Max] | Logic Type | Trigger Type | Direction | Package / Case | Package / Case | Reset | Package / Case [x] | Package / Case [x] | Timing | Grade | Qualification | Package / Case [y] | Package / Case [y] |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Surface Mount | 35 MHz | 6 V | 2 V | 14 | 16-SOIC | 1 | -55 C | 125 °C | Binary Counter | Negative Edge | Up | 16-SOIC | 0.154 in, 3.9 mm Width | Asynchronous | ||||||||
Surface Mount | 35 MHz | 6 V | 2 V | 14 | 16-TSSOP | 1 | -55 C | 125 °C | Binary Counter | Negative Edge | Up | 16-TSSOP | Asynchronous | 0.173 " | 4.4 mm | |||||||
Texas Instruments SN74HC4060DTThe ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-SOIC | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-SOIC | 0.154 in, 3.9 mm Width | Asynchronous | Asynchronous | ||||||
Texas Instruments CD74HC4060EThe ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels.
The ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels. | Through Hole | 35 MHz | 6 V | 2 V | 14 | 16-PDIP | 1 | -55 C | 125 °C | Binary Counter | Negative Edge | Up | 16-DIP | 0.3 in, 7.62 mm | Asynchronous | |||||||
Texas Instruments CD74HC4060MThe ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels.
The ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels. | Surface Mount | 35 MHz | 6 V | 2 V | 14 | 16-SOIC | 1 | -55 C | 125 °C | Binary Counter | Negative Edge | Up | 16-SOIC | 0.154 in, 3.9 mm Width | Asynchronous | |||||||
Texas Instruments CD74HC4060PWTThe ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels.
The ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels. | Surface Mount | 35 MHz | 6 V | 2 V | 14 | 16-TSSOP | 1 | -55 C | 125 °C | Binary Counter | Negative Edge | Up | 16-TSSOP | Asynchronous | 0.173 " | 4.4 mm | ||||||
Texas Instruments SN74HC4060QDRQ1The ’HC4060-Q1 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060-Q1 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-SOIC | 1 | -40 °C | 125 °C | Binary Counter | Negative Edge | Up | 16-SOIC | 0.154 in, 3.9 mm Width | Asynchronous | Asynchronous | Automotive | AEC-Q100 | ||||
Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-TSSOP | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-TSSOP | Asynchronous | 0.173 " | 4.4 mm | Asynchronous | ||||||
Texas Instruments CD74HC4060PWRThe ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels.
The ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels. | Surface Mount | 35 MHz | 6 V | 2 V | 14 | 16-TSSOP | 1 | -55 C | 125 °C | Binary Counter | Negative Edge | Up | 16-TSSOP | Asynchronous | 0.173 " | 4.4 mm | ||||||
Texas Instruments SN74HC4060DBRThe ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-SSOP | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-SSOP | Asynchronous | Asynchronous | 0.209 in | 5.3 mm | |||||
Texas Instruments SN74HC4060PWRThe ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-TSSOP | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-TSSOP | Asynchronous | 0.173 " | 4.4 mm | Asynchronous | |||||
Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-SO | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-SOIC (0.209", 5.30mm Width) | Asynchronous | Asynchronous | ||||||||
Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-TSSOP | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-TSSOP | Asynchronous | 0.173 " | 4.4 mm | Asynchronous | ||||||
Texas Instruments SN74HC4060DRThe ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-SOIC | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-SOIC | 0.154 in, 3.9 mm Width | Asynchronous | Asynchronous | ||||||
Texas Instruments SN74HC4060PWRG4The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-TSSOP | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-TSSOP | Asynchronous | 0.173 " | 4.4 mm | Asynchronous | |||||
Texas Instruments SN74HC4060NSRThe ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-SO | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-SOIC (0.209", 5.30mm Width) | Asynchronous | Asynchronous | |||||||
Texas Instruments SN74HC4060NThe ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Through Hole | 33 MHz | 6 V | 2 V | 14 | 16-PDIP | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-DIP | 0.3 in, 7.62 mm | Asynchronous | Asynchronous | ||||||
Texas Instruments SN74HC4060PWTThe ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-TSSOP | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-TSSOP | Asynchronous | 0.173 " | 4.4 mm | Asynchronous | |||||
Texas Instruments CD74HC4060M96The ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels.
The ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels. | Surface Mount | 35 MHz | 6 V | 2 V | 14 | 16-SOIC | 1 | -55 C | 125 °C | Binary Counter | Negative Edge | Up | 16-SOIC | 0.154 in, 3.9 mm Width | Asynchronous | |||||||
Texas Instruments SN74HC4060PWThe ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low). | Surface Mount | 33 MHz | 6 V | 2 V | 14 | 16-TSSOP | 1 | -40 °C | 85 °C | Binary Counter | Negative Edge | Up | 16-TSSOP | Asynchronous | 0.173 " | 4.4 mm | Asynchronous | |||||
Texas Instruments CD74HC4060MTThe ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels.
The ’HC4060 and ’HCT4060 each consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC or crystal oscillator circuits. A Master Reset input is provided which resets the counter to the all-0’s state and disables the oscillator. A high level on the MR line accomplishes the reset function. All counter stages are master-slave flip-flops. The state of the counter is advanced one step in binary order on the negative transition ofO). All inputs and outputs are buffered. Schmitt trigger action on the input-pulse-line permits unlimited rise and fall times.
In order to achieve a symmetrical waveform in the oscillator section the HCT4060 input pulse switch points are the same as in the HC4060; only the MR input in the HCT4060 has TTL switching levels. | Surface Mount | 35 MHz | 6 V | 2 V | 14 | 16-SOIC | 1 | -55 C | 125 °C | Binary Counter | Negative Edge | Up | 16-SOIC | 0.154 in, 3.9 mm Width | Asynchronous |
Description
General part information
74HC4060 Series
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
The ’HC4060 devices consist of an oscillator section and 14 ripple-carry binary counter stages. The oscillator configuration allows design of either RC- or crystal-oscillator circuits. A high-to-low transition on the clock (CLKI) input increments the counter. A high level at the clear (CLR) input disables the oscillator (CLKO\ goes high and CLKO goes low) and resets the counter to zero (all Q outputs low).
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Technical documentation and resources