MC74LVQ646 Datasheet, PDF (7/10 Pages) Motorola, Inc – LOW-VOLTAGE CMOS OCTAL TRANSCEIVER/ REGISTERED TRANSCEIVER

VCC
An, Bn
50% VCC
0V
ts
th
VCC
CAB,
CBA
50% VCC
tw
50% VCC
0V
fmax
tPLH, tPHL
VOH
Bn, An
50% VCC
VOL
WAVEFORM 3 – CLOCK to Bn/An PROPAGATION DELAYS, CLOCK MINIMUM PULSE WIDTH,
An/Bn to CLOCK SETUP AND HOLD TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns except when noted
NEGATIVE
PULSE
tw
50% VCC
50% VCC
MC74LVQ646
POSITIVE
PULSE
50% VCC
tw
WAVEFORM 4 – INPUT PULSE DEFINITION
tR = tF = 2.5ns, 10% to 90% of 0V to VCC
50% VCC
Figure 2. AC Waveforms
PULSE
GENERATOR
VCC
DUT
RT
R1
CL
RL
6V
OPEN
GND
LCX DATA
BR1478
TEST
SWITCH
tPLH, tPHL
Open
tPZL, tPLZ
6V
Open Collector/Drain tPLH and tPHL
6V
tPZH, tPHZ
GND
CL = 50pF or equivalent (Includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Figure 3. Test Circuit
7
MOTOROLA