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M74HC4538C1R Folha de dados(PDF) 1 Page - STMicroelectronics

Nome de Peças M74HC4538C1R
Descrição Electrónicos  DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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M54HC4538
M74HC4538
October 1993
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
B1R
(Plastic Package)
ORDER CODES :
M54HC4538F1R
M74HC4538M1R
M74HC4538B1R
M74HC4538C1R
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
PIN CONNECTIONS (top view)
NC =
No Internal
Connection
.
HIGH SPEED
tPD = 25 ns (TYP.) AT VCC =5 V
.
LOW POWER DISSIPATION
STANDBY STATEICC =4
µA(MAX.) ATTA =25°C
ACTIVE STATE ICC =200
µA (TYP.)ATVCC =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
The M54/74HC4538 is a high speed CMOS DUAL
MONOSTABLEMULTIVIBRATOR fabricated in sili-
con gate C
2MOS 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 in-
hibit 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 gener-
ating 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, R in
Ohms, and C is in Farads.
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
DESCRIPTION
1/14


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