HD74HC193 查看數據表（PDF） - Renesas Electronics

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HD74HC193

Synchronous Up/Down Decade Counter

Renesas Electronics 

HD74HC192, HD74HC193

• Waveform – 4 (HD74HC193)

tr

tf

Count

Down

50% 50%

50%

tw (H)

tw (L) tPLH (Measure at tn+0)

50%

tPHL (Measure at tn+1)

QA

50%

50%

tPLH (Measure at tn+0)

tPHL (Measure at tn+2)

QB

50%

50%

tPLH (Measure at tn+0)

tPHL (Measure at tn+4)

QC

50%

50%

tPLH (Measure at tn+0)

tPHL (Measure at tn+8)

QD

50%

50%

Borrow

(Measure before tPHL

1 clock of tn+0)

tPLH (Measure at tn+0)

90%

50%

10%

90%

50%

tTHL

tTLH

Notes : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns

2. tn is reference bit time when outputs are H, L, L, H

VCC

0V

VOH

VOL

VOH

VOL

VOH

VOL

VOH

VOL

VOH

VOL

Rev.3.00, Jan 31, 2006 page 11 of 13

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