MC74LCX257 Motorola, MC74LCX257 Datasheet - Page 5

• Manufacturer Part Number: MC74LCX257
• Description: Low-Voltage CMOS Quad 2-Input Multiplexer
• Manufacturer: Motorola

LCX DATA
BR1339 — REV 3
In, S
Zn
t PLH
1.5V
WAVEFORM 1 – NON–INVERTING PROPAGATION DELAYS
t R = t F = 2.5ns, 10% to 90%; f = 1MHz; t W = 500ns
GENERATOR
PULSE
1.5V
OE
Zn
Zn
t PLH , t PHL
t PZL , t PLZ
Open Collector/Drain t PLH and t PHL
t PZH , t PHZ
C L = 50pF or equivalent (Includes jig and probe capacitance)
R L = R 1 = 500 or equivalent
R T = Z OUT of pulse generator (typically 50 )
t PZH
t PZL
1.5V
WAVEFORM 3 – OUTPUT ENABLE AND DISABLE TIMES
t R = t F = 2.5ns, 10% to 90%; f = 1MHz; t W = 500ns
1.5V
t PHL
1.5V
Figure 1. AC Waveforms
R T
Figure 2. Test Circuit
1.5V
1.5V
TEST
2.7V
0V
V OH
V OL
V CC
DUT
t PHZ
t PLZ
5
Zn
S
t PLH
1.5V
1.5V
WAVEFORM 2 – INVERTING PROPAGATION DELAYS
t R = t F = 2.5ns, 10% to 90%; f = 1MHz; t W = 500ns
C L
SWITCH
Open
GND
6V
6V
R L
1.5V
R 1
V OL + 0.3V
GND
2.7V
0V
V CC
V OH – 0.3V
3.0V
0V
6V
OPEN
GND
1.5V
1.5V
t PHL
MC74LCX257
MOTOROLA
2.7V
0V
V OH
V OL