74LVC157A Philips, 74LVC157A Datasheet - Page 2

• Manufacturer Part Number: 74LVC157A
• Description: Quad 2-input multiplexer
• Manufacturer: Philips

1. C
Philips Semiconductors
FEATURES
DESCRIPTION
The 74LVC157A is a high-performance, low-power, Si-gate CMOS
device, superior to most advanced CMOS compatible TTL families.
Inputs can be driven from either 3.3V or 5.0V devices. In 3-State
operation, outputs can handle 5V. This feature allows the use of
these devices as translators in a mixed 3.3V/5V environment.
The 74LVC157A is a quad 2-input multiplexer which select 4 bits of
data from two sources under the control of a common data select
QUICK REFERENCE DATA
GND = 0 V; T
NOTES:
ORDERING INFORMATION
PIN CONFIGURATION
16-Pin Plastic SO
16-Pin Plastic SSOP Type II
16-Pin Plastic TSSOP Type I
1998 Jul 29
Wide supply voltage range of 1.2 to 3.6 V
In accordance with JEDEC standard no. 8-1A
CMOS lower power consumption
Direct interface with TTL levels
5 Volt tolerant inputs, for interfacing with 5 Volt logic
Quad 2-input multiplexer
P
f
f
i
o
PD
D
= input frequency in MHz; C
(C
= output frequency in MHz; V
= C
SYMBOL
L
t
is used to determine the dynamic power dissipation (P
PHL
C
PD
C
V
PD
/t
PACKAGES
CC
I
amb
PLH
2
V
CC
= 25 C; t
GND
f
1I
1I
2I
2I
o
2
1Y
2Y
) = sum of the outputs.
S
0
1
0
1
f
i
6
7
2
3
4
5
8
1
) (C
Propagation delay
nl
E to nY
S to nY
Input capacitance
Power dissipation capacitance per gate
r
= t
0
, nl1, to nY
f
L
2.5 ns
L
= output load capacitance in pF;
CC
V
CC
= supply voltage in V;
PARAMETER
2
TEMPERATURE RANGE
SV00563
f
16
15
14
12
11
10
13
o
9
) where:
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
V
E
4I
4I
4Y
3I
3I
3Y
CC
0
1
0
1
D
in W)
OUTSIDE NORTH AMERICA
C
V
V
L
CC
I
= GND to V
2
= 50 pF;
= 3.3 V
input (S). The four outputs present the selected data in the true
(non-inverted) form. The enable input (E) is active LOW. When E is
HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all
other input conditions. Moving the data from two groups of registers
to four common output buses is a common use of the 74LV157. The
state of the common data select input (S) determines the particular
register from which the data comes. It can also be used as function
generator.
The device is useful for implementing highly irregular logic by
generating any four of the 16 different functions of two variables with
one variable common.
The 74LVC157A is the logic implementation of a 4-pole, 2-position
switch, where the position of the switch is determined by the logic
levels applied to S.
PIN DESCRIPTION
74LVC157A PW
74LVC157A DB
74LVC157A D
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
8
15
16
CONDITIONS
NUMBER
PIN
CC
1
S
1l
1l
1Y to 4Y
GND
E
V
SYMBOL
CC
0
1
to 4l
to 4l
0
1
74LVC157APW DH
NORTH AMERICA
74LVC157A DB
74LVC157A D
Common data select input
Data inputs from sources 0
Data inputs from sources 1
Multiplexer outputs
Ground (0 V)
Enable input (active LOW)
Positive supply voltage
TYPICAL
3.1
3.0
3.3
5.0
33
FUNCTION
74LVC157A
Product specification
PKG. DWG. #
853-1945 19802
SOT109-1
SOT338-1
SOT403-1
UNIT
pF
pF
ns