monostable multivibrator. 74HC4538 Datasheet

74HC4538 multivibrator. Datasheet pdf. Equivalent

74HC4538 Datasheet
Recommendation 74HC4538 Datasheet
Part 74HC4538
Description Dual retriggerable precision monostable multivibrator
Feature 74HC4538; HD74HC4538 Dual Precision Retriggerable/Resettable Monostable Multivibrators Description Each multi.
Manufacture Hitachi
Datasheet
Download 74HC4538 Datasheet




Hitachi 74HC4538
HD74HC4538
Dual Precision Retriggerable/Resettable Monostable
Multivibrators
Description
Each multivibrator features both a negative, A, and a positive, 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 short. The
HD74HC4538 is retriggerable. That is, it may be triggered repeatedly while their outputs are generating a
pulse and the pulse will be extended.
Pulse width stability over a wide range of temperature. The output pulse equation is simply: tw = 0.7 (R)
(C).
Features
High Speed Operation: tpd (A or B to Y) = 22 ns typ (CL = 50 pF)
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current
Function Table
Inputs
Outputs
CD A B Q Q
LX X L H
HL
HH
HH
Not triggered
H L Not triggered
X : Irrelevant



Hitachi 74HC4538
HD74HC4538
Pin Arrangement
T1A 1
T2A 2
CDA 3
AA 4
BA 5
QA 6
QA 7
GND 8
T2T1
CD
A
B
Q
Q
T1
T2
CD
A
B
Q
Q
(Top view)
16 VCC
15 T1B
14 T2B
13 CDB
12 AB
11 BB
10 QB
9 QB
2



Hitachi 74HC4538
Block Diagram
AA
BA
CDA
AB
BB
CDB
HD74HC4538
CX RX
T1A T2A
VCC
QA
QA
CX RX
T1B T2B
VCC
QB
QB
RX and CX are external components
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