74LVC257A Philips Semiconductors, 74LVC257A Datasheet - Page 6

• Manufacturer Part Number: 74LVC257A
• Description: Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs 3-State
• Manufacturer: Philips Semiconductors

Philips Semiconductors
AC WAVEFORMS
V
V
V
V
V
V
V
output load.
1998 Jul 29
Figure 1. Input (S, nl
M
M
X
X
Y
Y
OL
HIGH-to-OFF
OFF-to-HIGH
Quad 2-input multiplexer with 5 Volt tolerant
inputs/outputs (3-State)
LOW-to-OFF
OFF-to-LOW
= V
= V
= V
= V
= 0.5
= 1.5 V at V
and V
OE INPUT
nY OUTPUT
OUTPUT
OUTPUT
S, nI
OL
OL
OH
OH
INPUTS
GND
GND
+ 0.3 V at V
+ 0.1 V
0
V
V
V
OH
– 0.3 V at V
– 0.1
, nI
CC
OH
V
GND
OL
V
Figure 2. 3-state enable and disable times.
V
V
V
CC
I
CC
OH
OL
1
are the typical output voltage drop that occur with the
CC
at V
V
CC
t
enabled
outputs
CC
PHL
CC
2.7 V
CC
at V
V
CC
at V
M
t
PLZ
0
t
2.7 V
PHZ
, nl
CC
2.7 V
CC
2.7V
V
1
M
) to output (nY) propagation delays.
2.7 V
V
2.7 V
X
V
V
M
Y
disabled
outputs
t
PZL
t
PZH
V
M
V
M
SV00642
enabled
t
SV00641
outputs
PLH
6
TEST CIRCUIT
GENERATOR
PULSE
Figure 3. Load circuitry for switching times.
2.7V – 3.6V
t 2.7V
V
CC
V
I
R
2.7V
V
T
V
CC
D.U.T.
I
V
CC
V
O
C
t
t
t
PHZ
PLH
PLZ
L
Test
/t
/t
/t
PHL
PZL
PZH
74LVC257A
50pF
Product specification
2 x V
Open
GND
S
500
500
S
1
CC
1
SY00003
2 x V
Open
GND
CC