Philips 74F257A User manual

Philips Semiconductors
74F257A
Quad 2-line to 1-line selector/multiplexer,
non-inverting (3-State)
Product specification 1995 Mar 31
INTEGRATED CIRCUITS
IC15 Data Handbook

Philips Semiconductors Product specification
74F257A
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
2
1995 Mar 31 853–0360 15059
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
16
15
14
13
12
11
107
6
5
4
3
2
1
Yb
VCC
Yd
I0c
I1c
I1d
OE
I0d
S
I0a
I1b
I1a
Ya
I0b
98GND Yc
SF00673
TYPE TYPICAL
PROPAGATION DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F257A 4.3ns 12mA
ORDERING INFORMATION
ORDER CODE
DRAWING
DESCRIPTION COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°CINDUSTRIAL RANGE VCC = 5V ±10%, Tamb = –40°C to +85°C
DRAWING
NUMBER
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
SCommon 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
VCC = Pin 16
GND = Pin 8
SF00674
1
15
S
OE
2356111014
I0a I1a I0b I1b I0c I1c I0d
Ya Yb Yc Yd
47912
13
I1d
LOGIC SYMBOL (IEEE/IEC)
SF00675
21
15 EN
1G1
34
1
MUX
5
67
10
11 9
13
14 12

Philips Semiconductors Product specification
74F257A
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
1995 Mar 31 3
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
VCC = Pin 16
GND = Pin 8
SF00676
FUNCTION TABLE
INPUTS OUTPUT
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
APPLICATION
SF00677
I0a I1a I0b I1b I0c I1c I0d I1d
Ya Yb Yc Yd
I0a I1a I0b I1b I0c I1c I0d I1d
Ya Yb Yc Yd
I0a I1a I0b I1b I0c I1c I0d I1d
Ya Yb Yc Yd
I0a I1a I0b I1b I0c I1c I0d I1d
Ya Yb Yc Yd
74F257A74F257A74F257A74F257A
4-BIT
DATA
BUS
OE
S
OE
S
OE
S
OE
S
WORD A WORD B WORD C WORD D WORD E WORD F WORD G WORD H
Y0 Y1 Y2 Y3
74F139
C
B
A
S2
S1
S0
ENABLE

Philips Semiconductors Product specification
74F257A
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
1995 Mar 31 4
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 PARAMETER RATING UNIT
VCC Supply voltage –0.5 to +7.0 V
VIN Input voltage –0.5 to +7.0 V
IIN Input current –30 to +5 mA
VOUT Voltage applied to output in High output state –0.5 to VCC V
IOUT Current applied to output in Low output state 48 mA
T
O
p
erating free air tem
p
erature range
Commercial range 0 to +70 °C
T
amb
Operating
free
-
air
temperat
u
re
range
Industrial range –40 to +85 °C
Tstg Storage temperature range –65 to +150 °C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5.0 5.5 V
VIH High-level input voltage 2.0 V
VIL Low-level input voltage 0.8 V
IIK Input clamp current –18 mA
IOH High-level output current –3 mA
IOL Low-level output current 24 mA
T
O
p
erating free air tem
p
erature range
Commercial range 0+70 °C
T
amb
Operating
free
-
air
temperat
u
re
range
Industrial range –40 +85 °C

Philips Semiconductors Product specification
74F257A
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
1995 Mar 31 5
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS1
LIMITS
UNIT
SYMBOL
PARAMETER
TEST
CONDITIONS1
MIN TYP2MAX
UNIT
VO
High level out
p
ut voltage
V
CC
= MIN, VIL = MAX, ±10%VCC 2.4 V
V
OH
High
-
le
v
el
o
u
tp
u
t
v
oltage
CC ,IL ,
VIH = MIN, IOH = MAX ±5%VCC 2.7 3.3 V
VO
Low level out
p
ut voltage
V
CC
= MIN, VIL = MAX, ±10%VCC 0.35 0.50 V
V
OL
Lo
w-
le
v
el
o
u
tp
u
t
v
oltage
CC ,IL ,
VIH = MIN, IOL = MAX ±5%VCC 0.35 0.50 V
VIK Input clamp voltage VCC = MIN, II= IIK –0.73 –1.2 V
IIInput current at maximum input voltage VCC = MAX, VI= 7.0V 100 µA
IIH High-level input current VCC = MAX, VI= 2.7V 20 µA
IIL Low-level input current VCC = MAX, VI= 0.5V –0.6 mA
IOZH Off state output current,
High-level voltage applied VCC = MAX, VO= 2.7V 50 µA
IOZL Off state output current,
Low-level voltage applied VCC = MAX, VO= 0.5V –50 µA
IOS Short-circuit output current3VCC = MAX -60 –150 mA
4
ICCH 9.0 15.0 mA
ICC Supply current
4
(total) ICCL VCC = MAX 14.5 22.0 mA
ICCZ 15.0 23.0 mA
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 VCC = 5V, Tamb = 25°C.
3. Not more than one output should be shorted at a time. For testing IOS, 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, IOS tests should be performed last.
4. Measure ICC with all outputs open and inputs grounded.
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL PARAMETER TEST
CONDITION
Tamb = +25°C
VCC = +5.0V
CL= 50pF
RL= 500Ω
Tamb = 0°C to +70°C
VCC = +5.0V ±10%
CL= 50pF
RL= 500Ω
Tamb = –40°C to +85°C
VCC = +5.0V ±10%
CL= 50pF
RL= 500ΩUNIT
MIN TYP MAX MIN MAX MIN MAX
tPLH
tPHL Propagation delay In to Yn Waveform 1 3.0 2.0 4.5 3.5 6.0 5.0 3.0 2.0 7.0 6.0 3.0 2.0 7.0 7.0 ns
tPLH
tPHL Propagation delay S to Yn Waveform 1 5.0 4.0 7.5 5.5 9.5 7.0 5.0 4.0 10.5 8.0 5.0 4.0 10.5 8.5 ns
tPZH
tPZL Output Enable time to High or Low level Waveform 2 Waveform 3 4.5 4.5 6.5 6.0 7.5 7.5 4.5 4.5 8.5 8.5 4.5 4.5 8.5 8.5 ns
tPHZ
tPLZ Output Disable time from High or Low level Waveform 2 Waveform 3 2.0 2.0 4.0 3.5 5.5 5.5 2.0 2.0 6.0 6.0 2.0 2.0 6.0 6.0 ns

Philips Semiconductors Product specification
74F257A
Quad 2-line to 1-line selector/multiplexer, non-inverting
(3-State)
1995 Mar 31 6
AC WAVEFORMS
For all waveforms, VM= 1.5V.
VM VM
VM
VM
Yn
In or S
tPHL tPLH
SF00679
Waveform 1. Propagation Delay, Data and Select to Output
VOH–0.3V
VM
VM VM
Yn
tPZH tPHZ
SF00213
OE
0V
Waveform 2. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
VOL+0.3V
VM
VM VM
Yn
tPZL tPLZ
SF00214
OE
Waveform 3. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
tw90%
VM
10%
90%
VM10%
90%
VM10%
90%
VM
10%
NEGATIVE
PULSE
POSITIVE
PULSE
tw
AMP (V)
0V
0V
tTHL (tf)
INPUT PULSE REQUIREMENTS
rep. rate twtTLH tTHL
1MHz 500ns 2.5ns 2.5ns
Input Pulse Definition
VCC
family
74F
D.U.T.
PULSE
GENERATOR
RL
CL
RT
VIN VOUT
Test Circuit for 3-State Outputs
DEFINITIONS:
RL= Load resistor;
see AC electrical characteristics for value.
CL= Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
RT= Termination resistance should be equal to ZOUT of
pulse generators.
tTHL (tf)
tTLH (tr)
tTLH (tr)AMP (V)
amplitude
3.0V 1.5V
VM
RL
7.0V
SF00777
TEST SWITCH
tPLZ closed
tPZL closed
All other open
SWITCH POSITION

Philips Semiconductors Product specification
74F257AQuad 2-line 1-line selector/multiplexer, non-inverting (3-State)
1995 Mar 31 7
DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4

Philips Semiconductors Product specification
74F257AQuad 2-line 1-line selector/multiplexer, non-inverting (3-State)
1995 Mar 31 8
SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1