HD74LS193 Datasheet, PDF (2/12 Pages) Hitachi Semiconductor – Synchronous Up/Down 4-bit Binary Counters(dual clock lines)

HD74LS193
Pin Arrangement
Data B
Input
1
Outputs
QB 2
QA 3
Inputs
Count
Down
4
Count
Up
5
Outputs
QC 6
QD 7
GND 8
B
QB
A
QA
Clear
Count
Down
Borrow
Count
Up
Carry
QC
Load
QD
C
D
16 V_CC
15 Data A
14 Clear
Inputs
13 _Borrow
12 Carry
Outputs
11 _Load
10 _{Data C Inputs}
9 _{Data D}
(Top view)
Rev.2.00, Feb.18.2005, page 2 of 11