74HC193 Datasheet, PDF (5/13 Pages) NXP Semiconductors – Presettable synchronous 4-bit binary up/down counter

Philips Semiconductors
Presettable synchronous 4-bit binary
up/down counter
Product specification
74HC/HCT193
FUNCTION TABLE
OPERATING MODE
reset (clear)
parallel load
count up
count down
INPUTS
OUTPUTS
MR PL CP_U CP_D D₀ D₁ D₂ D₃ Q₀ Q₁ Q₂ Q₃ TC_U TC_D
H X X L XXX X L
H X X H XXX X L
L L LH L
L L LH H
L L X L LLL L L
L L X H LLL L L
L L L X HHH H H
L L H X HHH H H
L L LH L
L L LH H
H H HL H
H H HH H
L H ↑ H XXX X
count up
H⁽²⁾ H
L H H ↑ XXX X
count down
H
H⁽³⁾
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
↑ = LOW-to-HIGH clock transition
2. TC_U = CP_U at terminal count up (HHHH)
3. TC_D = CP_D at terminal count down (LLLL)
Fig.4 Functional diagram.
December 1990
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