74HC193 Datasheet, PDF (4/30 Pages) NXP Semiconductors – Presettable synchronous 4-bit binary up/down counter

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D0
D1
D2
PL
CPU
CPD
MR
SD
Q
T FF1
Q
RD
Q0
SD
Q
T FF2
Q
RD
Q1
SD
Q
T FF3
Q
RD
Q2
D3
SD
Q
T FF4
Q
RD
TCU
TCD
Q3
001aag412
Fig 4. Logic diagram