74HC193_13 Datasheet, PDF (6/30 Pages) NXP Semiconductors – Presettable synchronous 4-bit binary up/down counter

NXP Semiconductors
74HC193; 74HCT193
Presettable synchronous 4-bit binary up/down counter
6. Functional description
Table 3. Function table^[1]
Operating mode
Inputs
Outputs
MR PL CPU CPD D0 D1 D2 D3 Q0 Q1 Q2 Q3 TCU TCD
Reset (clear)
HXXL XXXXL L L L HL
HXXHXXXXL L L L HH
Parallel load
L L XL L L L L L L L L HL
L L XHL L L L L L L L HH
L L L XHHHHHHHHL H
L L HXHHHHHHHHHH
Count up
L H  H X X X X count up
H^[2] H
Count down
L H H  X X X X count down
H
H^[3]
[1] H = HIGH voltage level
L = LOW voltage level
X = don’t care
 = LOW-to-HIGH clock transition.
[2] TCU = CPU at terminal count up (HHHH)
[3] TCD = CPD at terminal count down (LLLL).
74HC_HCT193
Product data sheet
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Rev. 4 — 24 June 2013
© NXP B.V. 2013. All rights reserved.
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