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74als253
DATASHEETS (Philips)
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Datasheet 74als253 DATASHEETS (Philips)

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Page 1
INTEGRATED CIRCUITS
74ALS253
Dual 4–input multiplexer (3–State)
Product specification IC05 Data Handbook
 
1991 Feb 08
Page 2
74ALS253Dual 4-input multiplexer (3-State)

FEA TURES

•3-State outputs for bus interface and multiplex operation
•Common select inputs
•Separate output enable inputs

DESCRIPTION

The 74ALS253 has two identical 4-input multiplexers with 3-State outputs which select 2 bits from four sources by using common select input (S0, S1). When the individual output enable (OE OE
b) inputs of the 4-input multiplexers are High, the outputs are
forced to a High impedance (Z) state. The 74ALS253 is the logic implementation of 2-pole, 4-position
switch being determined by the logic levels supplied to the common select inputs.
To avoid exceeding the maximum current ratings when the outputs of the 3-State devices are tied together, all but one device must be in the High impedance state. Therefore, only one output enable must be achieved at a time.
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74ALS253 7.0ns 8mA
a,

PIN CONFIGURATION

OE
I3a I2a I1a I0a
1
a
2
S1
3 4 5 6
Ya
16 15 14 13 12 11 107
98GND Yb
V OE S0
I3b I2b I1b I0b
CC
b

ORDERING INFORMA TION

ORDER CODE
DESCRIPTION COMMERCIAL RANGE
V
= 5V ±10%,
CC
T
= 0°C to +70°C
amb
16-pin plastic DIP 74ALS253N SOT38-4
16-pin plastic SO 74ALS253D SOT109-1
16-pin plastic SSOP
Type II
74ALS253DB SOT338-1
DRAWING
NUMBER
SF00798

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS DESCRIPTION
I0a – I3a Port A data inputs 1.0/1.0 20µA/0.1mA I0b – I3b Port B data inputs 1.0/1.0 20µA/0.1mA
S0, S1 Common select inputs 1.0/1.0 20µA/0.1mA
OEa Port A Output Enable input (active-Low) 1.0/1.0 20µA/0.1mA OEb Port B Output Enable input (active-Low) 1.0/1.0 20µA/0.1mA
Ya – Yb 3-State outputs 130/240 2.6mA/24mA
NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.

LOGIC SYMBOL

14
2 1
15
= Pin 16
V
CC
GND = Pin 8
6 13121110
I0a I1a I2a I3a I0b I1b I2b I3b S0 S1
OEa
OEb
345
Ya Yb
97
SF00799

IEC/IEEE SYMBOL

74ALS (U.L.)
HIGH/LOW
14 2
1 6 5 4 3 15 10 11 12 13
0 2
EN
0
G
3
MUX
0 1 2 3
LOAD VALUE
HIGH/LOW
7
9
SC00073
1991 Feb 08 853–1378 01670
2
Page 3
SYMBOL
PARAMETER
UNIT
74ALS253Dual 4-input multiplexer (3-State)

LOGIC DIAGRAM

I0a6I1a5I2a4I3a
OEa
1
S12S014I0b10I1b11I2b12I3b13OEb
3
15

FUNCTION TABLE

S0 S1 I0 I1 I2 I3 OEn Yn
X X X X X X H Z L L L X X X L L L L H X X X L H H L X L X X L L H L X H X X L H L H X X L X L L L H X X H X L H H H X X X L L L H H X X X H L H
H = High voltage level L = Low voltage level X = Don’t care Z = High impedance “off” state
VCC = Pin 16 GND = Pin 8
7
Ya
9
Yb
SC00074

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limit 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 –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 Operating free-air temperature range 0 to +70 °C Storage temperature range –65 to +150 °C
PARAMETER RATING UNIT
INPUTS OUTPUTS
CC
V

RECOMMENDED OPERATING CONDITIONS

V
CC
V
V
I
IK
I
OH
I
OL
T
amb
1991 Feb 08
Supply voltage 4.5 5.0 5.5 V High-level input voltage 2.0 V
IH
Low-level input voltage 0.8 V
IL
Input clamp current –18 mA High-level output current –2.6 mA Low-level output current 24 mA Operating free-air temperature range 0 +70 °C
LIMITS
MIN NOM MAX
3
Page 4
SYMBOL
PARAMETER
TEST CONDITIONS
1
UNIT
VOHHigh-level output voltage
CC
,
IL
,
VOLLow-level output voltage
CC
,
IL
,
ICCSupply current (total)
V
MAX
74ALS253Dual 4-input multiplexer (3-State)

DC ELECTRICAL CHARACTERISTICS

(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
MIN TYP
– 2 V
CC
V
I I
I
OZH
I
OZL
I
p
p
Input clamp voltage VCC = MIN, II = I
IK
I
IH
Input current at maximum input voltage VCC = MAX, VI = 7.0V 0.1 mA
I
High-level input current VCC = MAX, VI = 2.7V 20 µA Low-level input current VCC = MAX, VI = 0.4V –0.1 mA
IL
Off-state output current, High-level voltage applied
Off-state output current, Low-level voltage applied
O
Output current
3
pp
VCC±10%, VIL = MAX, VIH = MIN
VCC = MIN, VIL = MAX, VIH = MIN
IK
VCC = MAX, VI = 2.7V 20 µA
VCC = MAX, VI = 0.4V –20 µA VCC = MAX, VO = 2.25V –30 –112 mA
I
CC
I
CCZ
CC
=
IOH = –0.4mA V IOH = –2.6mA 2.4 V
I
= 12mA 0.25 0.40 V
OL
I
= 24mA 0.35 0.50 V
OL
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. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
= 5V, T
CC
amb
= 25°C.
2
MAX
–0.73 –1.5 V
7.0 12 mA
9.0 14 mA
OS
.

AC ELECTRICAL CHARACTERISTICS

SYMBOL PARAMETER TEST CONDITION
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation delay In to Yn
Propagation delay Sn to Yn
Output enable time, High or Low level OE
n to Yn
Output disable time, High or Low level OE
n to Yn
Waveform 1
Waveform 1 Waveform 2
Waveform 3 Waveform 2
Waveform 3
LIMITS
T
= 0°C to +70°C
amb
V
= +5.0V ± 10%
CC
C
= 50pF, RL = 500Ω
L
MIN MAX
4.0
4.0
5.0
7.0
1.0
3.0
1.0
1.0
12.0
12.0
15.0
16.0
8.0
9.0
7.0
7.0
UNIT
ns
ns
ns
ns
1991 Feb 08
4
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74ALS253Dual 4-input multiplexer (3-State)

AC WAVEFORMS

For all waveforms, VM = 1.3V.
In, Sn
Yn
V
M
t
PLH
V
M
t
PHL
V
M
V
M
SF00802
Waveform 1. Propagation Delay for Data and Select to Output
OE
n
Yn
V
M
t
PZH
V
V
M
t
PHZ
M
VOH –0.3V
0V
SF00804
Waveform 2. 3-State Output Enable Time to High Level
and Output Disable Time from High Level

TEST CIRCUIT AND WAVEFORMS

OE
n
Yn
V
M
t
PZL
V
V
M
t
PLZ
M
VOL +0.3V
SC00075
Waveform 3. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
3.5V
V
PULSE
GENERATOR
CC
V
IN
R
T
D.U.T.
V
OUT
R
L
C
R
L
L
7.0V
Test Circuit for 3-State Outputs
SWITCH POSITION
TEST SWITCH
t
PLZ
, t
PZL
closed
All other open
DEFINITIONS:
R
= Load resistor;
L
see AC electrical characteristics for value.
CL= Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
R
= Termination resistance should be equal to Z
T
pulse generators.
OUT
of
NEGATIVE PULSE
POSITIVE PULSE
Family
74ALS
90%
10%
Amplitude
t
w
V
M
10%
)
V
90%
M
t
THL (tf
t
TLH (tr
f
)
t
TLH (tr
t
THL (tf
t
w
Input Pulse Definition
INPUT PULSE REQUIREMENTS
V
Rep.Rate
M
3.5V
1.3V
1MHz
V
10%
)
)
90%
t
w
500ns
M
V
M
t
TLHtTHL
2.0ns 2.0ns
90%
10%
AMP (V)
0.3V
AMP (V)
0.3V
SC00072
1991 Feb 08
5
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74ALS253Dual 4–input multiplexer (3–State)

DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4

1991 Feb 08
6
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74ALS253Dual 4–input multiplexer (3–State)

SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1

1991 Feb 08
7
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74ALS253Dual 4–input multiplexer (3–State)

SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1

1991 Feb 08
8
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74ALS253Dual 4–input multiplexer (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.
Copyright Philips Electronics North America Corporation 1997
All rights reserved. Printed in U.S.A.
 
1991 Feb 08
9
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