Important notice
Dear Customer,
On 7 February 2017 the former NXP Standard Product business became a new company with the
tradename
Nexperia.
Nexperia is an industry leading supplier of Discrete, Logic and PowerMOS
semiconductors with its focus on the automotive, industrial, computing, consumer and wearable
application markets
In data sheets and application notes which still contain NXP or Philips Semiconductors references, use
the references to Nexperia, as shown below.
Instead of http://www.nxp.com, http://www.philips.com/ or http://www.semiconductors.philips.com/,
use
http://www.nexperia.com
Instead of sales.addresses@www.nxp.com or sales.addresses@www.semiconductors.philips.com, use
salesaddresses@nexperia.com
(email)
Replace the copyright notice at the bottom of each page or elsewhere in the document, depending on
the version, as shown below:
- © NXP N.V. (year). All rights reserved or © Koninklijke Philips Electronics N.V. (year). All rights
reserved
Should be replaced with:
-
© Nexperia B.V. (year). All rights reserved.
If you have any questions related to the data sheet, please contact our nearest sales office via e-mail
or telephone (details via
salesaddresses@nexperia.com).
Thank you for your cooperation and
understanding,
Kind regards,
Team Nexperia
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
Rev. 7 — 2 February 2016
Product data sheet
1. General description
The 74HC257; 74HCT257 is a quad 2-input multiplexer with 3-state outputs. Inputs
include clamp diodes. This enables the use of current limiting resistors to interface inputs
to voltages in excess of V
CC
.
2. Features and benefits
Non-inverting data path
3-state outputs interface directly with system bus
Complies with JEDEC standard no. 7A
Input levels:
For 74HC257: CMOS level
For 74HCT257: TTL level
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from
40 C
to +85
C
and from
40 C
to +125
C
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74HC257D
74HCT257D
74HC257DB
74HCT257DB
74HC257PW
74HCT257PW
40 C
to +125
C
TSSOP16
40 C
to +125
C
SSOP16
plastic shrink small outline package; 16 leads;
body width 5.3 mm
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT338-1
SOT403-1
40 C
to +125
C
Name
SO16
Description
Version
plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
Type number
NXP Semiconductors
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
4. Functional diagram
Fig 1.
Logic symbol
Fig 2.
IEC logic symbol
Fig 3.
Functional diagram
74HC_HCT257
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 7 — 2 February 2016
2 of 17
NXP Semiconductors
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
Fig 4.
Logic diagram
5. Pinning information
5.1 Pinning
Fig 5.
Pin configuration SO16, SSOP16 and TSSOP16
74HC_HCT257
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 7 — 2 February 2016
3 of 17
NXP Semiconductors
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
5.2 Pin description
Table 2.
Symbol
S
1I0 to 4I0
1I1 to 4I1
1Y to 4Y
GND
OE
V
CC
Pin description
Pin
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
8
15
16
Description
common data select input
data input from source 0
data input from source 1
3-state multiplexer output
ground (0 V)
3-state output enable input (active LOW)
supply voltage
6. Functional description
6.1 Function table
Table 3.
Control
OE
H
L
L
L
L
[1]
Function table
[1]
Input
S
X
H
H
L
L
nl0
X
X
X
L
H
nl1
X
L
H
X
X
Output
nY
Z
L
H
L
H
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
SO16 package
SSOP16 package
TSSOP16 package
[1]
[2]
[3]
[2]
[3]
[3]
Conditions
V
I
<
0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
0.5
V or V
O
> V
CC
+ 0.5 V
V
O
=
0.5
V to V
CC
+ 0.5 V
[1]
[1]
Min
0.5
-
-
-
-
70
65
-
-
-
Max
+7
20
20
35
+70
-
+150
500
500
500
Unit
V
mA
mA
mA
mA
mA
C
mW
mW
mW
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For SO16 packages: above 70
C,
P
tot
derates linearly with 8 mW/K.
For SSOP16 and TSSOP16 packages: above 60
C,
P
tot
derates linearly with 5.5 mW/K.
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
74HC_HCT257
Product data sheet
Rev. 7 — 2 February 2016
4 of 17
京公网安备 11010802033920号
EEWORLD
