MM74HC123ASJX ,Dual Retriggerable Monostable MultivibratorFeaturesThe MM74HC123A high speed monostable multivibrators
MM74HC123AM-MM74HC123AMTCX-MM74HC123AMX-MM74HC123AN-MM74HC123ASJ-MM74HC123ASJX
Dual Retriggerable Monostable Multivibrator
MM74HC123A Dual Retriggerable Monostable Multivibrator September 1983 Revised May 2001 MM74HC123A Dual Retriggerable Monostable Multivibrator General Description Features The MM74HC123A high speed monostable multivibratorsTypical propagation delay: 25 ns (one shots) utilize advanced silicon-gate CMOS technol-Wide power supply range: 2V–6V ogy. They feature speeds comparable to low power Schot- Low quiescent current: 80 μA maximum (74HC Series) tky TTL circuitry while retaining the low power and high Low input current: 1 μA maximum noise immunity characteristic of CMOS circuits. Fanout of 10 LS-TTL loads Each multivibrator features both a negative, A, and a posi- Simple pulse width formula T = RC tive, B, transition triggered input, either of which can be used as an inhibit input. Also included is a clear input thatWide pulse range: 400 ns to ∞ (typ) when taken low resets the one shot. The MM74HC123A Part to part variation: ±5% (typ) can be triggered on the positive transition of the clear while Schmitt Trigger A & B inputs allow rise and fall times to A is held LOW and B is held HIGH. be as slow as one second The MM74HC123A is retriggerable. That is it may be trig- gered repeatedly while their 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 ) (C ); where EXT EXT 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 V and ground. CC Ordering Code: Order Number Package Number Package Description MM74HC123AM M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow MM74HC123ASJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide MM74HC123AMTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide MM74HC123AN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Timing Component Connection Diagram Note: Pin 6 and Pin 14 must be hard-wired to GND. Top View © 2001 DS005206
