HD74HC4538 Datasheet, PDF (9/16 Pages) Hitachi Semiconductor – Dual Precision Retriggerable/Resettable Monostable Multivibrators

VCC
RX
2, 14
T2
CX
VCC
M2
M1
2kΩ
M3
4, 12
A
B
5, 11
S1
VCC
M4
Trigger-Control Circuit
CQ
C_R
Upper Reference
Circuit
+
–
Vref Upper
Lower Reference
Circuit
+
–
Vref Lower
Output Latch
Trigger-Control
Reset Circuit
3, 13
CD
HD74HC4538
6, 10
Q
7, 9
Q
Reset Latch
Fig. 1 Function Diagram
9