SDAS137A − DECEMBER 1983 − REVISED DECEMBER 1994
Copyright 1994, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
•4-Line to 1-Line Multiplexers That Can
Select 1-of-16 Data Inputs
•Applications:
Boolean Function Generator
Parallel-to-Serial Converter
Data Source Selector
•Buffered 3-State Bus Driver Inputs Permit
Multiplexing From n Lines to One Line
•Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic
(NT) and Ceramic (JT) 300-mil DIPs
description
The ′AS250A devices provide full binary decoding
to select 1-of-16 data inputs or use sources as an
input with an inverting W output. The selected
sources are buffered with symmetrical
propagation delay times. This reduces the
possibility of transients occurring at the output.
A buffered output-enable (OE) input can be used
for n-line to 1-line cascading. Taking OE high
places the output in the high-impedance state. In
the high-impedance state, the output neither loads
nor drives the bus lines significantly.
OE does not affect the internal operations of the
data selector/multiplexer. New data can be set up
while the outputs are disabled.
The SN54AS250A is characterized for operation
over the full military temperature range of −55°C
to 125°C. The SN74AS250A is characterized for
operation from 0°C to 70°C.
SN54AS250A ...JT PACKAGE
SN74AS250A . . . DW OR NT PACKAGE
(TOP VIEW)
SN54AS250A . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
E7
E6
E5
E4
E3
E2
E1
E0
OE
W
D
GND
VCC
E8
E9
E10
E11
E12
E13
E14
E15
A
B
C
321
13 14
5
6
7
8
9
10
11
E10
E11
E12
NC
E13
E14
E15
E4
E3
E2
NC
E1
E0
OE
4
15 16 17 18
D
GND
NC
C
B
A
E5
E6
E7
NC
28 27 2625
24
23
22
21
20
19
12
W
V
E8
E9
CC
NC − No internal connection
!"#$%&'(!$" !) *+%%,"( ') $# -+./!*'(!$" 0'(,1
%$0+*() *$"#$%& ($ )-,*!#!*'(!$") -,% (2, (,%&) $# ,3') ")(%+&,"()
)('"0'%0 4'%%'"(51 %$0+*(!$" -%$*,))!"6 0$,) "$( ",*,))'%!/5 !"*/+0,
(,)(!"6 $# '// -'%'&,(,%)1
EN
9MUX
0
15
A14
B13
C
3
11
D8
E0 7
E1 6
E2 5
E3 4
E4 3
E5 2
E6 1
E7 23
E8 22
E9 21
E10
G0
15
10
20
E11 19
E12 18
E13 17
E14 16
E15
OE
W
logic symbol†
†This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Pin numbers shown are for the DW, JT, and NT packages.
SDAS137A − DECEMBER 1983 − REVISED DECEMBER 1994
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
FUNCTION TABLE
INPUTS
OUTPUT
OE A B C D Ei
OUTPUT
W
L L L L L E0 E0
L H LLLE1 E1
L L HLLE2 E2
L H HLLE3 E3
L L LHLE4 E4
L H LHLE5 E5
L L HHLE6 E6
L H HHLE7 E7
L L LLHE8 E8
L H LLHE9 E9
L L H L H E10 E10
L H HLHE11E11
L L L H H E12 E12
L H L H H E13 E13
L L H H H E14 E14
L H H H H E15 E15
H X X X X X Z
SDAS137A − DECEMBER 1983 − REVISED DECEMBER 1994
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
logic diagram (positive logic)
E7
E8
E0
E1
E2
E3
E4
E5
E6
E9
E10
E11
E12
E13
E14
E15
A
B
C
D
OE
W
Data
Inputs
Data
Selects
8
7
6
5
4
3
2
1
23
22
21
20
19
18
17
16
15
14
13
11
10
A
B
C
D
A
B
C
D
Pin numbers shown are for the DW, JT, and NT packages.
SDAS137A − DECEMBER 1983 − REVISED DECEMBER 1994
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage, VCC 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN54AS250A −55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74AS250A 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range −65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN54AS250A SN74AS250A
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High-level input voltage 2 2 V
VIL Low-level input voltage 0.8 0.8 V
IOH High-level output current −12 −15 mA
IOL Low-level output current 32 48 mA
TAOperating free-air temperature −55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS250A SN74AS250A
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP‡MAX MIN TYP‡MAX
UNIT
VIK VCC = 4.5 V, II = −18 mA −1.2 −1.2 V
VCC = 4.5 V to 5.5 V, IOH = −2 mA VCC −2 VCC −2
V
OH
VCC = 4.5 V
IOH = −12 mA 2.4 3.3 V
VOH
VCC = 4.5 V IOH = −15 mA 2.4 3.3
V
VOL
VCC = 4.5 V
IOL = 32 mA 0.35 0.5
V
VOL VCC = 4.5 V IOL = 48 mA 0.35 0.5 V
IOZH VCC = 5.5 V, VO = 2.7 V 50 50 µA
IOZL VCC = 5.5 V, VO = 0.4 V −50 −50 µA
IIVCC = 5.5 V, VI = 7 V 0.1 0.1 mA
IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA
IIL VCC = 5.5 V, VI = 0.4 V −0.5 −0.5 mA
IO§VCC = 5.5 V, VO = 2.25 V −30 −112 −30 −112 mA
Outputs high 26 42 26 42
I
CC
V
CC
= 5.5 V Outputs low 31 50 31 50 mA
ICC
VCC = 5.5 V
Outputs disabled 30 48 30 48
mA
‡All typical values are at VCC = 5 V, TA = 25°C.
§The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
SDAS137A − DECEMBER 1983 − REVISED DECEMBER 1994
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
switching characteristics (see Figure 1)
PARAMETER FROM
(INPUT) TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX†UNIT
(INPUT)
(OUTPUT)
SN54AS250A SN74AS250A
MIN MAX MIN MAX
tPLH
Data
W
2 9.5 2 8
ns
tPHL Data W2 8.5 2 7 ns
tPLH
A, B, C, D
W
4 15.5 4 13
ns
tPHL A, B, C, D W4 12 4 10.5 ns
tPZH
OE
W
2 7.5 2 7
ns
tPZL OE W 2 10 2 9 ns
tPHZ
OE
W
1.5 6.5 1.5 6
ns
tPLZ
OE
W
2 8.5 2 6.5
ns
†For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
SDAS137A − DECEMBER 1983 − REVISED DECEMBER 1994
6POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
PARAMETER MEASUREMENT INFORMATION
SERIES 54ALS/74ALS AND 54AS/74AS DEVICES
tPHZ
tPLZ
tPHL tPLH
0.3 V
tPZL
tPZH
tPLH tPHL
LOAD CIRCUIT
FOR 3-STATE OUTPUTS
From Output
Under Test Test
Point
R1
S1
CL
(see Note A)
7 V
1.3 V
1.3 V1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
th
tsu
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
Timing
Input
Data
Input
1.3 V 1.3 V 3.5 V
3.5 V
0.3 V
0.3 V
High-Level
Pulse
Low-Level
Pulse
tw
VOLTAGE WAVEFORMS
PULSE DURATIONS
Input
Out-of-Phase
Output
(see Note C)
1.3 V 1.3 V
1.3 V1.3 V
1.3 V 1.3 V
1.3 V1.3 V
1.3 V
1.3 V
3.5 V
3.5 V
0.3 V
0.3 V
VOL
VOH
VOH
VOL
Output
Control
(low-level
enabling)
Waveform 1
S1 Closed
(see Note B)
Waveform 2
S1 Open
(see Note B) [0 V
VOH
VOL
[3.5 V
In-Phase
Output
0.3 V
1.3 V 1.3 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS
R2
VCC
RL
Test
Point
From Output
Under Test
CL
(see Note A)
LOAD CIRCUIT
FOR OPEN-COLLECTOR OUTPUTS
LOAD CIRCUIT FOR
BI-STATE
TOTEM-POLE OUTPUTS
From Output
Under Test Test
Point
CL
(see Note A) RL
RL = R1 = R2
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. When measuring propagation delay items of 3-state outputs, switch S1 is open.
D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%.
E. The outputs are measured one at a time with one transition per measurement.
Figure 1. Load Circuits and Voltage Waveforms
PACKAGE OPTION ADDENDUM
www.ti.com 5-Sep-2011
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
5962-9056201LA ACTIVE CDIP JT 24 1 TBD Call TI Call TI
SN74AS250ANT NRND PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
SN74AS250ANT3 OBSOLETE PDIP NT 24 TBD Call TI Call TI
SN74AS250ANTE4 NRND PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type
SNJ54AS250AJT ACTIVE CDIP JT 24 1 TBD A42 N / A for Pkg Type
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF SN54AS250A, SN74AS250A :
•Catalog: SN74AS250A
MECHANICAL DATA
MCER004A – JANUARY 1995 – REVISED JANUAR Y 1997
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
JT (R-GDIP-T**) CERAMIC DUAL-IN-LINE
24 LEADS SHOWN
4040110/C 08/96
B
0.200 (5,08) MAX
0.320 (8,13)
0.290 (7,37)
0.130 (3,30) MIN
0.008 (0,20)
0.014 (0,36)
Seating Plane
13
12
0.030 (0,76)
0.070 (1,78)
0.015 (0,38) MIN
A
24
1
0.100 (2,54) MAX
0.023 (0,58)
0.015 (0,38)
0.100 (2,54)
0°–15°
1.440
(37,08)
1.460
0.285
(7,39)
0.291
(36,58)
(7,24)
28
PINS **
1.280
1.240
0.300
0.245
(7,62)
DIM
B MAX
A MAX
A MIN
B MIN (6,22)
24
(32,51)
(31,50)
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a ceramic lid using glass frit.
D. Index point is provided on cap for terminal identification.
E. Falls within MIL STD 1835 GDIP3-T24, GDIP4-T28, and JEDEC MO-058 AA, MO-058 AB
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