Datasheet4U Logo Datasheet4U.com

DM74LS221 - Dual Non-Retriggerable One-Shot

Datasheet Summary

Description

The DM74LS221 is a dual monostable multivibrator with Schmitt-trigger input.

Each device has three inputs permitting the choice of either leading-edge or trailing-edge triggering.

Features

  • s A dual, highly stable one-shot s Compensated for VCC and temperature variations s Pin-out identical to DM74LS123 (Note 1) s Output pulse width range from 30 ns to 70 seconds s Hysteresis provided at (B) input for added noise immunity s Direct reset terminates output pulse s Triggerable from CLEAR input s DTL, TTL compatible s Input clamp diodes Note 1: The pin-out is identical to DM74LS123 but, functionally it is not; refer to Operating Rules #10 in this datasheet. Ordering Code: Order Nu.

📥 Download Datasheet

Datasheet preview – DM74LS221

Datasheet Details

Part number DM74LS221
Manufacturer Fairchild Semiconductor
File Size 108.96 KB
Description Dual Non-Retriggerable One-Shot
Datasheet download datasheet DM74LS221 Datasheet
Additional preview pages of the DM74LS221 datasheet.

📁 Similar Datasheet

  • DM74LS221 - Dual Non-Retriggerable One-Shot (National Semiconductor)
  • DM74LS22 - Dual 4-Input NAND Gates (National Semiconductor)
  • DM74LS20 - Dual 4-Input NAND Gates (National Semiconductor)
  • DM74LS21 - Dual 4-Input AND Gates (National Semiconductor)
  • DM74LS240 - Octal TRI-STATE Buffers/Line Drivers/Line Receivers (National Semiconductor)
  • DM74LS241 - Octal TRI-STATE Buffers/Line Drivers/Line Receivers (National Semiconductor)
  • DM74LS244 - Octal TRI-STATEE Buffers/Line Drivers/Line Receivers (National Semiconductor)
  • DM74LS245 - TRI-STATE Octal Bus Transceiver (National Semiconductor)
  • DM74LS247 - BCD to 7-Segment Decoder/Driver (National Semiconductor)
  • DM74LS251 - TRI-STATE Data Selectors/Multiplexers (National Semiconductor)
Other Datasheets by Fairchild Semiconductor
  • DM74LS20 - Dual 4-Input NAND Gate
  • DM74LS240 - Octal 3-STATE Buffer/Line Driver/Line Receiver
  • DM74LS241 - Octal 3-STATE Buffer/Line Driver/Line Receiver
  • DM74LS243 - Quadruple Bus Transceiver
  • DM74LS244 - Octal 3-STATE Buffer/Line Driver/Line Receiver
  • DM74LS245 - 3-STATE Octal Bus Transceiver
  • DM74LS247 - BCD to 7-Segment Decoder/Driver
  • DM74LS251 - 3-STATE 1-of-8 Line Data Selector/Multiplexer

Full PDF Text Transcription

Click to expand full text
DM74LS221 Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs August 1986 Revised April 2000 DM74LS221 Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs General Description The DM74LS221 is a dual monostable multivibrator with Schmitt-trigger input. Each device has three inputs permitting the choice of either leading-edge or trailing-edge triggering. Pin (A) is an active-LOW trigger transition input and pin (B) is an active-HIGH transition Schmitt-trigger input that allows jitter free triggering for inputs with transition rates as slow as 1 volt/second. This provides the input with excellent noise immunity. Additionally an internal latching circuit at the input stage also provides a high immunity to VCC noise.
Published: |