DESCRIPTION

The M54/74HC4538 is a high speed CMOS DUAL MONOSTABLEMULTIVIBRATOR fabricated insilicon gate C2MOS technology. It has the same high speed performance of LSTTL combined with true CMOS low power consumption. Each multivibrator features both a negative, A, and a positive, B, edge 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 monostable multivibrators are retriggerable. That is,they may be triggered reapeatedly 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.

■ HIGH SPEED

tPD = 25 ns (TYP.) AT VCC = 5 V

■ LOW POWER DISSIPATION

STANDBY STATEICC =4μA(MAX.)ATTA =25°C

ACTIVE STATE ICC =200 μA (TYP.) AT VCC = 5 V

■ HIGH NOISE IMMUNITY VNIH = VNIL = 28 VCC (MIN.)

■ OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS

■ BALANCED PROPAGATION DELAYS tPLH = tPHL

■ WIDE OUTPUT PULSE WIDTH RANGE

tWOUT = 120 ns ~ 60 s OVER AT VCC = 4.5 V

■ OUTPUT PULSE WIDTH INDEPENDENT FROM TRIGGER INPUT PULSE WIDTH

■ PIN AND FUNCTION COMPATIBLE WITH 4538B