MC74LCX2245 Datasheet, PDF (5/8 Pages) Motorola, Inc – LOW-VOLTAGE CMOS OCTAL TRANSCEIVER

MC74LCX2245
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
CIN
CI/O
CPD
Input Capacitance
Input/Output Capacitance
Power Dissipation Capacitance
Condition
Typical
Unit
VCC = 3.3V, VI = 0V or VCC
7
pF
VCC = 3.3V, VI = 0V or VCC
8
pF
10MHz, VCC = 3.3V, VI = 0V or VCC
25
pF
2.7V
An, Bn
1.5V
1.5V
0V
tPLH
tPHL
VOH
Bn, An
1.5V
1.5V
VOL
WAVEFORM 1 – PROPAGATION DELAYS
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
2.7V
OE, T/R
An, Bn
1.5V
1.5V
tPZH
tPHZ
1.5V
tPZL
tPLZ
0V
VCC
VOH – 0.3V
≈ 0V
≈ 3.0V
An, Bn
1.5V
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
tR = tF = 2.5ns, 10% to 90%; f = 1MHz; tW = 500ns
Figure 3. AC Waveforms
VOL + 0.3V
GND
PULSE
GENERATOR
VCC
DUT
RT
R1
CL
RL
6V
OPEN
GND
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 4. Test Circuit
LCX DATA
5
BR1339 — REV 3
MOTOROLA