MC14508B Datasheet, PDF (4/7 Pages) Motorola, Inc – Dual 4-Bit Latch

tWH(S)
STROBE
INPUT
50%
50%
tsu
Dn INPUT
th
50%
tPLH
tPHL
90%
Qn OUTPUT _10% 50%
tTLH
tTHL
tWH(R)
MASTER RESET
VDD
INPUT
50%
VSS
VOH
Qn OUTPUT
VOL
Figure 1. AC Waveforms
PULSE
GENERATOR
VDD
ST3
ST4
VDD
MR
Q0
ST
DISABLE Q1
D0
D1
Q2
D2
D3
Q3
VSS
VDD
ST1
1.0 k
1.0 k
CL
ST2
Test
tPHZ
tPLZ
tPZL
tPZH
ST1
Open
Close
Close
Open
ST2
Close
Open
Open
Close
ST3
Close
Open
Open
Close
ST4
Open
Close
Close
Open
20 ns
DISABLE
tPLZ
Q3 OUTPUT tPHZ
20 ns
90%
VDD
50%
10% _tPZLVSS
90% ^VOH
10%
≈ 2.5 V @ VDD = 5 V,
tPZH
10 V, AND 15 V
≈ 2 V @ VDD = 5 V
90%
≈ 6 V @ VDD = 10 V
10%
≈ 10 V @ VDD = 15 V
VOL
Figure 2. 3–State AC Test Circuit and Waveforms
MOTOROLA CMOS LOGIC DATA
MC14508B
347