74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049C − MARCH 1989 − REVISED MAY 2004
D 3-State Outputs Interface Directly With
D
D
D
D
DB, DW, N, OR PW PACKAGE
(TOP VIEW)
System Bus
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin VCC and GND Configurations
Minimize High-Speed Switching Noise
500-mA Typical Latch-Up Immunity at
125°C
Provides Bus Interface From Multiple
Sources in High-Performance Systems
A/B
1Y
2Y
GND
GND
GND
GND
3Y
4Y
OE
description/ordering information
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
1A
1B
2A
2B
VCC
VCC
3A
3B
4A
4B
This device is designed to multiplex signals from 4-bit data sources to four output data lines in bus-organized
systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
PDIP − N
SOIC − DW
−40°C
40°C to 85°C
SSOP − DB
TSSOP − PW
†
ORDERABLE
PART NUMBER
PACKAGE†
TA
Tube
74AC11257N
Tube
74AC11257DW
Tape and reel
74AC11257DWR
Tape and reel
74AC11257DBR
Tube
74AC11257PW
Tape and reel
74AC11257PWR
TOP-SIDE MARKING
74AC11257N
AC11257
AE257
AE257
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OUTPUT
Y
DATA
OE
SELECT
A/B
A
B
H
X
X
X
Z
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright © 2004, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049C − MARCH 1989 − REVISED MAY 2004
logic diagram (positive logic)
OE
A/B
1A
1B
2A
2B
3A
3B
4A
4B
10
1
20
2
1Y
19
18
3
2Y
17
14
8
3Y
13
12
9
4Y
11
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
Package thermal impedance, θJA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
2
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049C − MARCH 1989 − REVISED MAY 2004
recommended operating conditions (see Note 3)
VCC
Supply voltage
VCC = 3 V
VIH
High-level
High
level input voltage
MIN
NOM
MAX
3
5
5.5
Low-level
Low
level input voltage
VI
Input voltage
VO
Output voltage
VCC = 4.5 V
3.15
VCC = 5.5 V
3.85
V
0.9
VCC = 4.5 V
1.35
VCC = 5.5 V
1.65
High-level
High
level output current
IOL
Low-level
Low
level output current
Dt/Dv
Input transition rise or fall rate
TA
Operating free-air temperature
V
0
VCC
V
0
VCC
V
VCC = 3 V
IOH
V
2.1
VCC = 3 V
VIL
UNIT
−4
VCC = 4.5 V
−24
VCC = 5.5 V
−24
VCC = 3 V
12
VCC = 4.5 V
24
VCC = 5.5 V
24
−40
mA
mA
10
ns/V
85
°C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = −50
50 mA
VOH
IOH = −4 mA
24 mA
IOH = −24
VOL
TA = 25°C
MIN
TYP
MAX
MIN
3V
2.9
2.9
4.5 V
4.4
4.4
5.5 V
5.4
5.4
3V
2.58
2.48
4.5 V
3.94
3.8
5.5 V
4.94
MAX
4.8
5.5 V
3V
0.1
0.1
IOL = 50 mA
4.5 V
0.1
0.1
5.5 V
0.1
0.1
IOL = 12 mA
IOL = 75
mA†
IOZ
VO = VCC or GND
II
VI = VCC or GND
ICC
VI = VCC or GND,
Ci
VI = VCC or GND
Co
VO = VCC or GND
3.85
3V
0.36
0.44
4.5 V
0.36
0.44
5.5 V
0.36
0.44
5.5 V
IO = 0
UNIT
V
IOH = −75 mA†
IOL = 24 mA
†
VCC
V
1.65
5.5 V
±0.5
±5
mA
5.5 V
5.5 V
±0.1
±1
mA
8
80
mA
5V
3.5
pF
5.5 V
8
pF
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049C − MARCH 1989 − REVISED MAY 2004
switching characteristics over recommended operating free-air temperature range,
VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
FROM
(INPUT)
TO
(OUTPUT)
A or B
Y
A/B
Any Y
OE
Any Y
OE
Any Y
TA = 25°C
MIN
MAX
MIN
TYP
MAX
1.5
5.6
8.1
1.5
8.9
1.5
6.2
9
1.5
10.1
1.5
6.1
9.2
1.5
10.2
1.5
6.6
10
1.5
11.2
1.5
5.6
8.2
1.5
9.1
1.5
7.5
10.4
1.5
11.8
1.5
5.6
7.6
1.5
8.3
1.5
6.2
8.8
1.5
9.6
UNIT
ns
ns
ns
ns
switching characteristics, over recommended operating free-air temperature range,
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
FROM
(INPUT)
TO
(OUTPUT)
A or B
Y
A/B
Any Y
OE
Any Y
OE
Any Y
TA = 25°C
MIN
MAX
5.8
1.5
6.4
6.5
1.5
7.2
4
6.5
1.5
7.2
4.4
7.1
1.5
7.9
3.8
5.9
1.5
6.5
1.5
5
7.6
1.5
8.6
1.5
4.5
6.4
1.5
7.6
1.5
4.8
6.9
1.5
7.6
MIN
TYP
MAX
1.5
3.6
1.5
4.1
1.5
1.5
1.5
UNIT
ns
ns
ns
ns
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
Outputs enabled
Cpd
4
Power dissipation capacitance
Outputs disabled
POST OFFICE BOX 655303
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TYP
UNIT
37
CL = 50 pF,
pF
f = 1 MHz
11
pF
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049C − MARCH 1989 − REVISED MAY 2004
PARAMETER MEASUREMENT INFORMATION
2 × VCC
S1
500 Ω
From Output
Under Test
Open
GND
CL = 50 pF
(see Note A)
TEST
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2 × VCC
GND
500 Ω
LOAD CIRCUIT
VCC
50%
50%
0V
Input
tPHL
tPLH
VOH
In-Phase
Output
50% VCC
50% VCC
VOL
VOH
50% VCC
50% VCC
VOL
VCC
Output
Waveform 2
S1 at GND
(see Note B)
50%
50%
0V
tPZL
tPLZ
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
tPLH
tPHL
Out-of-Phase
Output
Output
Control
(low-level
enabling)
50% VCC
20% VCC
VOL
tPHZ
tPZH
VOLTAGE WAVEFORMS
[ VCC
50% VCC
80% VCC
VOH
[0V
VOLTAGE WAVEFORMS
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. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
D. The outputs are measured one at a time, with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
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• DALLAS, TEXAS 75265
5
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
74AC11257DW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AC11257
Samples
74AC11257N
ACTIVE
PDIP
N
20
20
RoHS &
Non-Green
NIPDAU
N / A for Pkg Type
-40 to 85
74AC11257N
Samples
74AC11257PW
ACTIVE
TSSOP
PW
20
70
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
AE257
Samples
(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)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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