Page 1
INTEGRATED CIRCUITS
74F257A
Quad 2-line to 1-line selector/multiplexer,
non-inverting (3-State)
Product specification 1995 Mar 31
IC15 Data Handbook
Philips Semiconductors
Page 2
Philips Semiconductors Product specification
DRAWING
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
FEA TURES
•Industrial range available (–40°C to +85°C)
•Multifunction capability
•Non-inverting data path
•3-State outputs
•See 74F258A for inverting version
DESCRIPTION
The 74F257A has four identical 2-input multiplexers with 3-State
outputs which select 4 bits of data from two sources uncer control of
a common Select (S) input. The I0a inputs are selected when the
common Select input is Low and the I1n inputs are selected when
the common Select input is High. Data appears at the outputs in true
non-inverted form from the selected inputs. The 74F257A is the logic
implementation of a 4-pole, 2-position switch where the position of
the switch is determined by the logic levels supplied to the common
Slect input. Outputs are forced to a high impedance “off” state when
the Output Enable (OE
impedance state to avoid currents that would exceed the maximum
rating if the outputs were tied together. Design of the Output Enable
signals must ensure that there is no overlap when outputs of 3-state
devices were tied together.
) is High. All but one device must be in high
PIN CONFIGURATION
S
I0a
I1a
Ya
I0b
I1b
Yb
TYPE
74F257A 4.3ns 12mA
TYPICAL
PROPAGATION DELAY
74F257A
1
2
3
4
5
6
16
V
CC
15
OE
14
I0d
13
I1d
Yd
12
I0c
11
107
I1c
98GND Yc
SF00673
TYPICAL
SUPPLY CURRENT
(TOTAL)
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%, T
= 0°C to +70°C
amb
VCC = 5V ±10%, T
INDUSTRIAL RANGE
= –40°C to +85°C
amb
16-pin plastic DIP N74F257AN I74F257AN SOT38-4
16-pin plastic SO N74F257AD I74F257AD SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW
I0n, I1n Data inputs 1.0/1.0 20µA/0.6mA
S Common Select input 1.0/1.0 20µA/0.6mA
OE Output Enable input (active Low) 1.0/1.0 20µA/0.6mA
Ya – Yd Data outputs 150/33 3.0mA/20mA
NOTE:
One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
1
15
VCC = Pin 16
GND = Pin 8
S
OE
2356111014
I0a I1a I0b I1b I0c I1c I0d
Ya Yb Yc Yd
47912
SF00674
13
I1d
LOGIC SYMBOL (IEEE/IEC)
15
1
2
3
5
6
10
11
13
14
EN
G1
1
1
MUX
4
7
9
12
SF00675
NUMBER
1995 Mar 31 853–0360 15059
2
Page 3
Philips Semiconductors Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
LOGIC DIAGRAM
I0a I1a I0b I1b I0c I1c I0d I1dOE S
2 3 5 6 11 10 14 1315 1
47912
Ya Yb Yc Yd
= Pin 16
V
CC
GND = Pin 8
SF00676
FUNCTION TABLE
OE S I0 I1 Y
H X X X Z
L H X L L
L H X H H
L L L X L
L L H X H
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state
74F257A
INPUTS OUTPUT
APPLICATION
S2
S1
S0
4-BIT
DATA
BUS
ENABLE
WORD A WORD B WORD C WORD D WORD E WORD F WORD G WORD H
I0a I1a I0b I1b I0c I1c I0d I1d
OE
S
Ya Yb Yc Yd
I0a I1a I0b I1b I0c I1c I0d I1d
OE
S
Ya Yb Yc Yd
C
B
A
Y0 Y1 Y2 Y3
74F139
I0a I1a I0b I1b I0c I1c I0d I1d
OE
S
Ya Yb Yc Yd
I0a I1a I0b I1b I0c I1c I0d I1d
OE
S
74F257A74F257A74F257A74F257A
Ya Yb Yc Yd
SF00677
1995 Mar 31
3
Page 4
Philips Semiconductors Product specification
T
Operating free-air temperature range
SYMBOL
PARAMETER
UNIT
T
Operating free-air temperature range
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
V
V
I
IN
V
I
OUT
T
CC
IN
OUT
amb
stg
Supply voltage –0.5 to +7.0 V
Input voltage –0.5 to +7.0 V
Input current –30 to +5 mA
Voltage applied to output in High output state –0.5 to V
Current applied to output in Low output state 48 mA
p
p
Storage temperature range –65 to +150 °C
RECOMMENDED OPERATING CONDITIONS
V
V
V
I
I
I
CC
IH
IL
IK
OH
OL
amb
Supply voltage 4.5 5.0 5.5 V
High-level input voltage 2.0 V
Low-level input voltage 0.8 V
Input clamp current –18 mA
High-level output current –3 mA
Low-level output current 24 mA
p
p
PARAMETER RATING UNIT
Commercial range 0 to +70 °C
Industrial range –40 to +85 °C
Commercial range 0 +70 °C
Industrial range –40 +85 °C
CC
LIMITS
MIN NOM MAX
74F257A
V
1995 Mar 31
4
Page 5
Philips Semiconductors Product specification
SYMBOL
PARAMETER
TEST CONDITIONS
1
UNIT
VOHHigh-level output voltage
CC
,
IL
,
VOLLow-level output voltage
CC
,
IL
,
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
MIN TYP
±10%V
±5%V
±10%V
±5%V
V
I
I
I
IH
I
IL
I
OZH
I
OZL
I
OS
I
CC
p
p
IK
Input clamp voltage VCC = MIN, II = I
VCC = MIN, VIL = MAX,
VIH = MIN, IOH = MAX
VCC = MIN, VIL = MAX,
VIH = MIN, I
OL
= MAX
IK
Input current at maximum input voltage VCC = MAX, VI = 7.0V 100 µA
High-level input current VCC = MAX, VI = 2.7V 20 µA
Low-level input current VCC = MAX, VI = 0.5V –0.6 mA
Off state output current,
High-level voltage applied
Off state output current,
Low-level voltage applied
Short-circuit output current
Supply current4 (total)
3
I
CCH
I
CCL
I
CCZ
VCC = MAX, VO = 2.7V 50 µA
VCC = MAX, VO = 0.5V –50 µA
VCC = MAX -60 –150 mA
VCC = MAX
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
3. Not more than one output should be shorted at a time. For testing I
= 5V, T
CC
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
amb
= 25°C.
, the use of high-speed test apparatus and/or sample-and-hold
OS
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
4. Measure I
with all outputs open and inputs grounded.
CC
tests should be performed last.
OS
2.4 V
CC
2.7 3.3 V
CC
CC
CC
0.35 0.50 V
0.35 0.50 V
–0.73 –1.2 V
9.0 15.0 mA
14.5 22.0 mA
15.0 23.0 mA
74F257A
2
MAX
AC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
1995 Mar 31
Propagation delay
In to Yn
Propagation delay
S to Yn
Output Enable time
to High or Low level
Output Disable time
from High or Low level
TEST
CONDITION
Waveform 1
Waveform 1
Waveform 2
Waveform 3
Waveform 2
Waveform 3
LIMITS
T
= +25°C
amb
VCC = +5.0V
C
= 50pF
L
R
= 500Ω
L
T
= 0°C to +70°C
amb
VCC = +5.0V ± 10%
C
= 50pF
L
R
= 500Ω
L
T
= –40°C to +85°C
amb
VCC = +5.0V ± 10%
C
= 50pF
L
R
= 500Ω
L
MIN TYP MAX MIN MAX MIN MAX
3.0
4.5
2.0
5.0
4.0
4.5
4.5
2.0
2.0
3.5
7.5
5.5
6.5
6.0
4.0
3.5
6.0
5.0
9.5
7.0
7.5
7.5
5.5
5.5
3.0
2.0
5.0
4.0
4.5
4.5
2.0
2.0
7.0
6.0
10.5
8.0
8.5
8.5
6.0
6.0
3.0
2.0
5.0
4.0
4.5
4.5
2.0
2.0
7.0
7.0
10.5
8.5
8.5
8.5
6.0
6.0
5
UNIT
ns
ns
ns
ns
Page 6
Philips Semiconductors Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
AC WAVEFORMS
For all waveforms, VM = 1.5V.
In or S
Yn
Waveform 1. Propagation Delay, Data and Select to Output
OE
Yn
V
M
t
PHL
V
M
t
PZH
V
M
t
PLH
V
M
V
M
V
M
SF00679
OE
V
M
t
PHZ
VOH–0.3V
0V
Yn
74F257A
V
M
t
PZL
V
M
t
PLZ
V
M
VOL+0.3V
SF00213
Waveform 2. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
TEST CIRCUIT AND WAVEFORMS
V
CC
R
PULSE
GENERATOR
V
IN
R
T
D.U.T.
V
OUT
Test Circuit for 3-State Outputs
SWITCH POSITION
TEST SWITCH
t
t
PLZ
PZL
closed
closed
All other open
DEFINITIONS:
R
= Load resistor;
L
see AC electrical characteristics for value.
C
= Load capacitance includes jig and probe capacitance;
L
see AC electrical characteristics for value.
= Termination resistance should be equal to Z
R
T
pulse generators.
L
C
R
L
L
of
OUT
7.0V
NEGATIVE
PULSE
POSITIVE
PULSE
family
74F
SF00214
Waveform 3. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
90%
10%
t
w
V
M
10%
)
V
90%
M
t
THL (tf
t
TLH (tr
)
t
t
t
w
TLH (tr
THL (tf
10%
)
)
90%
V
M
V
M
90%
10%
AMP (V)
0V
AMP (V)
0V
Input Pulse Definition
INPUT PULSE REQUIREMENTS
V
amplitude
3.0V
M
1.5V
rep. rate
1MHz 500ns
t
w
t
TLH
t
THL
2.5ns 2.5ns
SF00777
1995 Mar 31
6
Page 7
Philips Semiconductors Product specification
74F257AQuad 2-line 1-line selector/multiplexer, non-inverting (3-State)
DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4
1995 Mar 31
7
Page 8
Philips Semiconductors Product specification
74F257AQuad 2-line 1-line selector/multiplexer, non-inverting (3-State)
SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
1995 Mar 31
8
Page 9
Philips Semiconductors Product specification
74F257AQuad 2-line 1-line selector/multiplexer, non-inverting (3-State)
NOTES
1995 Mar 31
9
Page 10
Philips Semiconductors Product specification
74F257AQuad 2-line 1-line selector/multiplexer, non-inverting (3-State)
DEFINITIONS
Data Sheet Identification Product Status Definition
Objective Specification
Preliminary Specification
Product Specification
Formative or in Design
Preproduction Product
Full Production
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICA TIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.
Philips Semiconductors and Philips Electronics North America Corporation
register eligible circuits under the Semiconductor Chip Protection Act.
Copyright Philips Electronics North America Corporation 1996
All rights reserved. Printed in U.S.A.
(print code) Date of release: July 1994
Document order number: 9397-750-05107
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