CD74HC221PWT

Obsolete

Texas Instruments

HIGH SPEED CMOS LOGIC DUAL MONOSTABLE MULTIVIBRATORS WITH RESET

Find alt

Alpha

CD74HC221PWT

Obsolete

Texas Instruments

HIGH SPEED CMOS LOGIC DUAL MONOSTABLE MULTIVIBRATORS WITH RESET

Find alt

Alpha

Description Specifications Series Pricing CAD Documents

Description

General part information

CD74HC221 Series

The ’HC221 and CD74HCT221 are dual monostable multivibrators with reset. An external resistor (RX) and an external capacitor (CX) control the timing and the accuracy for the circuit. Adjustment of RXand CXprovides a wide range of output pulse widths from the Q and Q\ terminals. Pulse triggering on the B input occurs at a particular voltage level and is not related to the rise and fall time of the trigger pulse.

Once triggered, the outputs are independent of further trigger inputs on A\ and B. The output pulse can be terminated by a LOW level on the Reset (R)\ pin. Trailing Edge triggering (A)\ and leading-edge-triggering (B) inputs are provided for triggering from either edge of the input pulse. On power up, the IC is reset. If either Mono is not used each input (on the unused device) must be terminated either high or low.

The minimum value of external resistance, RX, is typically 500. The minimum value of external capacitance, CX, is 0pF. The calculation for the pulse width is tW= 0.7 RXCXat VCC= 4.5V.

Technical Specifications

Parameters and characteristics for this part

Specification	CD74HC221PWT

Current - Output High	5.2 mA
Current - Output Low	5.2 mA
Independent Circuits	2
Logic Type	Monostable
Mounting Type	Surface Mount
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-55 °C
Package Length	0.173 in
Package Name	16-TSSOP
Package Width	4.4 mm
Propagation Delay	18 ns
Schmitt Trigger Input	Yes
Voltage - Supply (Maximum)	6 V
Voltage - Supply (Minimum)	2 V

CD74HC221 Series

Part	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Logic Type	Propagation Delay	Independent Circuits	Schmitt Trigger Input	Current - Output High	Current - Output Low	Package Length	Package Name	Package Width	Operating Temperature (Max)	Operating Temperature (Min)	Mounting Type
Texas Instruments CD74HC221PW	6 V	2 V	Monostable	18 ns	2	Yes	5.2 mA	5.2 mA	0.173 in	16-TSSOP	4.4 mm	125 °C	-55 °C	Surface Mount
Texas Instruments CD74HC221NSR	6 V	2 V	Monostable	18 ns	2	Yes	5.2 mA	5.2 mA	0.209 in	16-SO 16-SOIC	5.3 mm	125 °C	-55 °C	Surface Mount
Texas Instruments CD74HC221M	6 V	2 V	Monostable	18 ns	2	Yes	5.2 mA	5.2 mA	0.154 in	16-SOIC	3.9 mm	125 °C	-55 °C	Surface Mount
Texas Instruments CD74HC221PWT	6 V	2 V	Monostable	18 ns	2	Yes	5.2 mA	5.2 mA	0.173 in	16-TSSOP	4.4 mm	125 °C	-55 °C	Surface Mount
Texas Instruments CD74HC221PWR	6 V	2 V	Monostable	18 ns	2	Yes	5.2 mA	5.2 mA	0.173 in	16-TSSOP	4.4 mm	125 °C	-55 °C	Surface Mount

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Create a free account to access distributor pricing data.

CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

CD54HC221, CD74HC221, CD74HCT221 datasheet (Rev. F)