HD74HC192 Datasheet, PDF (10/14 Pages) Hitachi Semiconductor – Synchronous Up/Down Decade,4-bit Binary Counter(Dual Clock Line)

HD74HC192, HD74HC193
• Waveform – 3 (HD74HC193)
tr
tf
Count
50%
Up
tw (H)
(Measure at tn+1) tPLH
90%
QA
50%
10%
tTLH
QB
50% 50%
tw (L)
tPHL (Measure at tn+2)
90%
50%
10%
tTHL
tPHL (Measure at tn+4)
90%
50%
10%
tTHL
tPHL (Measure at tn+8)
50%
tPLH (Measure at tn+2)
90%
50%
10%
tTLH
tPLH (Measure at tn+4)
QC
QD
Carry
90%
50%
10%
90%
50%
10%
tTHL
tPHL (Measure at tn+16)
tTLH
tPLH (Measure at tn+8)
90%
50%
10%
50%
10%
90%
(Measure before tPHL
1 clock of tn+16)
tTHL
tPLH (Measure at tn+16)
90%
50%
10%
90%
50%
tTLH
tTHL
tTLH
Notes : 1. Input pulse : PRR ≤ 1 MHz, Zo = 50 Ω, t_r ≤ 6 ns, t_f ≤ 6 ns
2. tn is reference bit time when all outputs are low.
V_CC
0V
VOH
VOL
VOH
VOL
VOH
VOL
VOH
VOL
VOH
VOL
Rev.3.00, Jan 31, 2006 page 10 of 13