74lvc257adb NXP Semiconductors, 74lvc257adb Datasheet - Page 2

• Manufacturer Part Number: 74lvc257adb
• Description: Quad 2-input Multiplexer With 5 Volt Tolerant Inputs/outputs 3-state
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
QUICK REFERENCE DATA
GND = 0 V; t
Notes
1. C
2. The condition is V
2004 Jan 23
t
t
C
C
t
PZH
PHZ
SYMBOL
PHL
5 V tolerant inputs/outputs, for interfacing with 5 V logic
Wide supply voltage range from 1.2 to 3.6 V
CMOS low-power consumption
Direct interface with TTL levels
Output drive capability 50
Complies with JEDEC standard no. 8-1A
ESD protection:
HBM EIA/JESD22-A114-A exceeds 2000 V
MM EIA/JESD22-A115-A exceeds 200 V
Specified from 40 to +85 C and 40 to +125 C.
I
PD
Quad 2-input multiplexer with 5 V
tolerant inputs/outputs; 3-state
P
f
f
C
V
N = total load switching outputs;
i
o
/t
/t
(C
/t
D
CC
PD
= input frequency in MHz;
L
PZL
PLZ
= output frequency in MHz;
PLH
= output load capacitance in pF;
= C
L
is used to determine the dynamic power dissipation (P
= supply voltage in Volts;
PD
V
CC
r
= t
propagation delay nI0, nI1 to nY
propagation delay S to nY
3-state output enable time OE to nY
3-state output disable time OE to nY
input capacitance
power dissipation capacitance per gate
2
V
f
CC
f
o
2.5 ns; T
2
) = sum of the outputs.
I
f
= GND to V
i
N + (C
amb
PARAMETER
transmission lines at 85 C
= 25 C.
L
CC
.
V
CC
2
f
o
) where:
2
DESCRIPTION
The 74LVC257A is a high-performance, low-power,
low-voltage, Si-gate CMOS device and superior to most
advanced CMOS compatible TTL families.
Inputs can be driven from either 3.3 or 5.0 V devices.
In 3-state operation, outputs can handle 5 V. This feature
allows the use of these devices as translators in a mixed
3.3 and 5 V environment.
The 74LVC257A is a quad 2-input multiplexer with 3-state
outputs, which select 4 bits of data from two sources and
are controlled by a common data select input (pin S). The
data inputs from source 0 (pins 1I0 to 4I0) are selected
when pin S is LOW and the data inputs from source 1
(pins 1I1 to 4I1) are selected when pin S is HIGH. Data
appears at the outputs (pins 1Y to 4Y) in true
(non-inverting) form from the selected inputs. The
74LVC257A 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 pin S. The
outputs are forced to a high-impedance OFF-state when
pin OE is HIGH.
C
C
C
C
V
D
CC
L
L
L
L
outputs enabled
outputs disabled
= 50 pF; V
= 50 pF; V
= 50 pF; V
= 50 pF; V
in W).
= 3.3 V; notes 1 and 2
CONDITIONS
CC
CC
CC
CC
= 3.3 V
= 3.3 V
= 3.3 V
= 3.3 V
2.9
3.2
3.7
3.2
5.0
16
7.0
TYPICAL
Product specification
74LVC257A
ns
ns
ns
ns
pF
pF
pF
UNIT