INTEGRATED CIRCUITS
74F257A
Quad 2-line to 1-line selector/multiplexer,
non-inverting (3-State)
Product specification
IC15 Data Handbook
1995 Mar 31
Philips Semiconductors
Philips Semiconductors
Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
74F257A
FEATURES
•
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) is High. All but one device must be in high
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.
PIN CONFIGURATION
S
I0a
I1a
Ya
I0b
I1b
Yb
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
OE
I0d
I1d
Yd
I0c
I1c
Yc
SF00673
TYPE
74F257A
TYPICAL
PROPAGATION DELAY
4.3ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
12mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
16-pin plastic DIP
16-pin plastic SO
COMMERCIAL RANGE
V
CC
= 5V
±10%,
T
amb
= 0°C to +70°C
N74F257AN
N74F257AD
INDUSTRIAL RANGE
V
CC
= 5V
±10%,
T
amb
= –40°C to +85°C
I74F257AN
I74F257AD
DRAWING
NUMBER
SOT38-4
SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
I0n, I1n
S
OE
Ya – Yd
DESCRIPTION
Data inputs
Common Select input
Output Enable input (active Low)
Data outputs
74F (U.L.) HIGH/LOW
1.0/1.0
1.0/1.0
1.0/1.0
150/33
LOAD VALUE HIGH/LOW
20µA/0.6mA
20µA/0.6mA
20µA/0.6mA
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
2
3
5
6
11
10
14
13
LOGIC SYMBOL (IEEE/IEC)
15
1
EN
G1
2
I0a I1a I0b
1
15
S
OE
Ya
Yb
Yc
Yd
I1b
I0c
I1c
I0d I1d
3
5
6
10
1
1
MUX
4
7
9
11
13
12
V
CC
= Pin 16
GND = Pin 8
4
7
9
12
14
SF00674
SF00675
1995 Mar 31
2
853–0360 15059
Philips Semiconductors
Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
74F257A
LOGIC DIAGRAM
OE
15
I0a
2
I1a
3
I0b
5
I1b
6
I0c
11
I1c
10
I0d
14
I1d
13
S
1
FUNCTION TABLE
INPUTS
OE
H
L
L
L
L
H
L
X
Z
=
=
=
=
S
X
H
H
L
L
I0
X
X
X
L
H
I1
X
L
H
X
X
OUTPUT
Y
Z
L
H
L
H
High voltage level
Low voltage level
Don’t care
High impedance “off” state
4
Ya
V
CC
= Pin 16
GND = Pin 8
Yb
7
Yc
9
12
Yd
SF00676
APPLICATION
ENABLE
S2
C
B
A
Y0
Y1
Y2
Y3
74F139
S1
S0
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
74F257A
I0a I1a I0b I1b I0c I1c I0d I1d
OE
S
Ya
Yb
Yc
Yd
74F257A
I0a I1a I0b I1b I0c I1c I0d I1d
OE
S
Ya
Yb
Yc
Yd
74F257A
I0a I1a I0b I1b I0c I1c I0d I1d
OE
S
Ya
Yb
Yc
Yd
74F257A
4-BIT
DATA
BUS
SF00677
1995 Mar 31
3
Philips Semiconductors
Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
74F257A
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
CC
V
IN
I
IN
V
OUT
I
OUT
T
amb
T
stg
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
Commercial range
Operating free-air temperature range
free air
Industrial range
Storage temperature range
–40 to +85
–65 to +150
PARAMETER
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to V
CC
48
0 to +70
UNIT
V
V
mA
V
mA
°C
°C
°C
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
V
CC
V
IH
V
IL
I
IK
I
OH
I
OL
T
amb
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Commercial range
Operating free-air temperature range
free air
Industrial range
0
–40
PARAMETER
MIN
4.5
2.0
0.8
–18
–3
24
+70
+85
NOM
5.0
MAX
5.5
V
V
V
mA
mA
mA
°C
°C
UNIT
1995 Mar 31
4
Philips Semiconductors
Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
74F257A
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS
1
MIN
V
O
OH
High-level
High level output voltage
V
CC
= MIN, V
IL
= MAX,
,
,
V
IH
= MIN, I
OH
= MAX
V
CC
= MIN, V
IL
= MAX,
,
,
V
IH
= MIN, I
OL
= MAX
V
CC
= MIN, I
I
= I
IK
V
CC
= MAX, V
I
= 7.0V
V
CC
= MAX, V
I
= 2.7V
V
CC
= MAX, V
I
= 0.5V
V
CC
= MAX, V
O
= 2.7V
V
CC
= MAX, V
O
= 0.5V
V
CC
= MAX
I
CCH
I
CC
Supply current
4
(total)
I
CCL
I
CCZ
V
CC
= MAX
-60
9.0
14.5
15.0
LIMITS
TYP
2
UNIT
MAX
V
3.3
0.35
0.35
–0.73
0.50
0.50
–1.2
100
20
–0.6
50
–50
–150
15.0
22.0
23.0
V
V
V
V
µA
µA
mA
µA
µA
mA
mA
mA
mA
±
10%V
CC
±
5%V
CC
±
10%V
CC
±
5%V
CC
2.4
2.7
V
O
OL
V
IK
I
I
I
IH
I
IL
I
OZH
I
OZL
I
OS
Low-level
Low level output voltage
Input clamp voltage
Input current at maximum input voltage
High-level input current
Low-level input current
Off state output current,
High-level voltage applied
Off state output current,
Low-level voltage applied
Short-circuit output current
3
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
CC
= 5V, T
amb
= 25°C.
3. Not more than one output should be shorted at a time. For testing I
OS
, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
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
OS
tests should be performed last.
4. Measure I
CC
with all outputs open and inputs grounded.
AC ELECTRICAL CHARACTERISTICS
LIMITS
TEST
CONDITION
T
amb
= +25°C
V
CC
= +5.0V
C
L
= 50pF
R
L
= 500Ω
MIN
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
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
Waveform 1
Waveform 1
Waveform 2
Waveform 3
Waveform 2
Waveform 3
3.0
2.0
5.0
4.0
4.5
4.5
2.0
2.0
TYP
4.5
3.5
7.5
5.5
6.5
6.0
4.0
3.5
MAX
6.0
5.0
9.5
7.0
7.5
7.5
5.5
5.5
T
amb
= 0°C to +70°C
V
CC
= +5.0V
±
10%
C
L
= 50pF
R
L
= 500Ω
MIN
3.0
2.0
5.0
4.0
4.5
4.5
2.0
2.0
MAX
7.0
6.0
10.5
8.0
8.5
8.5
6.0
6.0
T
amb
= –40°C to +85°C
V
CC
= +5.0V
±
10%
C
L
= 50pF
R
L
= 500Ω
MIN
3.0
2.0
5.0
4.0
4.5
4.5
2.0
2.0
MAX
7.0
7.0
10.5
8.5
8.5
8.5
6.0
6.0
ns
ns
ns
ns
SYMBOL
PARAMETER
UNIT
1995 Mar 31
5
