CD54HC192_1 Datasheet, PDF (2/21 Pages) Texas Instruments – High-Speed CMOS Logic Presettable Synchronous 4-Bit Up/Down Counters

CD54/74HC192, CD54/74HC193, CD54/74HCT193
Functional Diagram
BCD/BINARY
PRESET
P0 P1 P2 P3
15 1 10 9
ASYN.
PARALLEL
11
LOAD ^PL
ENABLE
MASTER ¹⁴
RESET
5
CLOCK UP
4
CLOCK DOWN
3
Q₀
2
Q_{1 BCD (192)}
6
Q₂
BINARY (193)
OUTPUTS
7
Q₃
12 TERMINAL
COUNT UP
13
TERMINAL
COUNT DOWN
TRUTH TABLE
CLOCK UP
CLOCK
DOWN
RESET
PARALLEL
LOAD
FUNCTION
↑
H
L
H
Count Up
H
↑
L
H
Count Down
X
X
H
X
Reset
X
X
L
L
Load Preset Inputs
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care, ↑ = Transition from Low to
High Level
2