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MM74HC423ASJ Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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MM74HC423ASJ Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 10 page © 2004 Fairchild Semiconductor Corporation DS005338 www.fairchildsemi.com September 1983 Revised January 2004 MM74HC423A Dual Retriggerable Monostable Multivibrator General Description The 74HC423A high speed monostable multivibrators (one shots) utilize advanced silicon-gate CMOS technology. They feature speeds comparable to low power Schottky TTL circuitry while retaining the low power and high noise immunity characteristic of CMOS circuits. Each multivibrator features both a negative, A, and a posi- tive, B, transition triggered input, either of which can be used as an inhibit input. Also included is a clear input that when taken LOW resets the one shot. The MM74HC423A cannot be triggered from clear. The MM74HC423A is retriggerable. That is, it may be trig- gered repeatedly while its outputs are generating a pulse and the pulse will be extended. Pulse width stability over a wide range of temperature and supply is achieved using linear CMOS techniques. The out- put pulse equation is simply: PW = (R EXT) (CEXT); where PW is in seconds, R is in ohms, and C is in farads. All inputs are protected from damage due to static discharge by diodes to VCC and ground. Features s Typical propagation delay: 40 ns s Wide power supply range: 2V–6V s Low quiescent current: 80 µA maximum (74HC Series) s Low input current: 1 µA maximum s Fanout of 10 LS-TTL loads s Simple pulse width formula T = RC s Wide pulse range: 400 ns to ∞ (typ) s Part to part variation: ±5% (typ) s Schmitt Trigger A & B inputs allow rise and fall times to be as slow as one second Ordering Code: Note 1: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagrams Top View Timing Component Note: Pin 6 and Pin 14 must be hard-wired to GND. Order Number Package Number Package Description MM74HC423AM (Note 1) M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow MM74HC423ASJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide MM74HC423AMTC (Note 1) MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide MM74HC423AN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide |
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