器件名称:
74HC4538
功能描述:
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
文件大小:
288.92KB 共14页
简 介:
M54HC4538 M74HC4538 DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR . . . . . . . . HIGH SPEED tPD = 25 ns (TYP.) AT VCC = 5 V LOW POWER DISSIPATION STANDBY STATEICC =4 A (MAX.) AT TA = 25 °C ACTIVE STATE ICC = 200 A (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 B1R (Plastic Package) F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) ORDER CODES : M54HC4538F1R M74HC4538M1R M74HC4538B1R M74HC4538C1R PIN CONNECTIONS (top view) DESCRIPTION The M54/74HC4538 is a high speed CMOS DUAL MONOSTABLEMULTIVIBRATOR fabricated in silicon 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. The output pulse equation is simply : PW = 0.7 (R)(C) where PW is in seconds……
