SN74HCT646DW
ActiveOCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
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SN74HCT646DW
ActiveOCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS
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Technical Specifications
Parameters and characteristics commom to parts in this series
| Specification | SN74HCT646DW | 74HCT646 Series |
|---|---|---|
| Current - Output High, Low [custom] | 6 mA | 6 mA |
| Current - Output High, Low [custom] | 6 mA | 6 mA |
| Mounting Type | Surface Mount | Surface Mount, Through Hole |
| Number of Bits per Element | 8 | 8 |
| Number of Elements [custom] | 1 | 1 |
| Operating Temperature [Max] | 85 °C | 85 - 125 °C |
| Operating Temperature [Min] | -40 °C | -55 - -40 C |
| Output Type | 3-State | 3-State |
| Package / Case | 24-SOIC | 24-SOIC, 24-DIP |
| Package / Case | - | 0.3 - 7.62 mm |
| Package / Case [x] | 0.295 in | 0.295 in |
| Package / Case [y] | 7.5 mm | 7.5 mm |
| Supplier Device Package | 24-SOIC | 24-SOIC, 24-PDIP |
| Voltage - Supply [Max] | 5.5 V | 5.5 V |
| Voltage - Supply [Min] | 4.5 V | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 1.77 | |
| 10 | $ 1.59 | |||
| 25 | $ 1.50 | |||
| 100 | $ 1.28 | |||
| 250 | $ 1.20 | |||
| 500 | $ 1.05 | |||
| 1000 | $ 0.87 | |||
| 2500 | $ 0.81 | |||
| 5000 | $ 0.78 | |||
| Texas Instruments | TUBE | 1 | $ 1.53 | |
| 100 | $ 1.26 | |||
| 250 | $ 0.91 | |||
| 1000 | $ 0.68 | |||
74HCT646 Series
High Speed CMOS Logic Octal Bus Transceivers/Registers with 3-State Outputs
| Part | Number of Bits per Element | Output Type | Package / Case [y] | Package / Case [x] | Package / Case | Supplier Device Package | Operating Temperature [Min] | Operating Temperature [Max] | Number of Elements [custom] | Current - Output High, Low [custom] | Current - Output High, Low [custom] | Mounting Type | Voltage - Supply [Max] | Voltage - Supply [Min] | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments CD74HCT646M96 | 8 | 3-State | 7.5 mm | 0.295 in | 24-SOIC | 24-SOIC | -55 C | 125 °C | 1 | 6 mA | 6 mA | Surface Mount | 5.5 V | 4.5 V | |
Texas Instruments SN74HCT646DWR | 8 | 3-State | 7.5 mm | 0.295 in | 24-SOIC | 24-SOIC | -40 °C | 85 °C | 1 | 6 mA | 6 mA | Surface Mount | 5.5 V | 4.5 V | |
Texas Instruments SN74HCT646DW | 8 | 3-State | 7.5 mm | 0.295 in | 24-SOIC | 24-SOIC | -40 °C | 85 °C | 1 | 6 mA | 6 mA | Surface Mount | 5.5 V | 4.5 V | |
Texas Instruments SN74HCT646NT | 8 | 3-State | 24-DIP | 24-PDIP | -40 °C | 85 °C | 1 | 6 mA | 6 mA | Through Hole | 5.5 V | 4.5 V | 0.3 in, 7.62 mm |
Description
General part information
74HCT646 Series
The CD54HC646 and CD74HCT646 consist of bus-transceiver circuits with 3-state outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1 illustrates the four fundamental bus-management functions that can be performed with these devices.
Output-enable (OE\) and direction-control (DIR) inputs control the transceiver functions. In the transceiver mode, data present at the high-impedance port can be stored in either or both registers.
The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. DIR determines which bus receives data when OE\ is active (low). In the isolation mode (OE\ high), A data can be stored in one register and/or B data can be stored in the other register.
Documents
Technical documentation and resources