TI 74AC11257DW

74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B – MARCH 1989 – REVISED JUNE 1996
D
D
D
D
D
D
D
3-State Outputs Interface Directly With
System Bus
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin VCC and GND Configurations
Minimize High-Speed Switching Noise
EPICt (Enhanced-Performance Implanted
CMOS) 1-mm Process
500-mA Typical Latch-Up Immunity at
125°C
Provides Bus Interface From Multiple
Sources in High-Performance Systems
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (N)
DW OR N PACKAGE
(TOP VIEW)
A/B
1Y
2Y
GND
GND
GND
GND
3Y
4Y
OE
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
description
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.
The 74AC11257 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
INPUTS
OUTPUT
Y
DATA
OE
SELECT
A/B
A
B
H
X
X
X
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
Z
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.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright  1996, 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.
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• DALLAS, TEXAS 75265
1
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B – MARCH 1989 – REVISED JUNE 1996
logic symbol†
OE
A/B
1A
1B
2A
2B
3A
3B
4A
4B
10
1
20
19
18
EN
G1
1
MUX
2
1Y
1
17
14
13
12
11
3
8
9
2Y
3Y
4Y
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
OE
A/B
1A
1B
2A
2B
3A
3B
4A
4B
2
10
1
20
2
1Y
19
18
3
2Y
17
14
8
3Y
13
12
9
11
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4Y
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B – MARCH 1989 – REVISED JUNE 1996
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
Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DW package . . . . . . . . . . . . . . . . . . 1.6 W
N package . . . . . . . . . . . . . . . . . . . . 1.3 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 maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils,
except for the N package, which has a trace length of zero.
recommended operating conditions
VCC
VIH
Supply voltage
VCC = 3 V
VCC = 4.5 V
High-level input voltage
VCC = 5.5 V
VCC = 3 V
VIL
VI
VO
IOH
IOL
Low-level input voltage
MIN
NOM
MAX
3
5
5.5
3.85
0.9
1.35
0
0
Input transition rise or fall rate
TA
Operating free-air temperature
VCC = 3 V
VCC = 4.5 V
POST OFFICE BOX 655303
VCC
VCC
V
V
–4
–24
VCC = 5.5 V
VCC = 3 V
–24
VCC = 4.5 V
VCC = 5.5 V
24
• DALLAS, TEXAS 75265
V
1.65
Output voltage
Dt/Dv
V
3.15
Input voltage
Low-level output current
V
2.1
VCC = 4.5 V
VCC = 5.5 V
High-level output current
UNIT
mA
12
mA
24
0
10
ns/V
–40
85
°C
3
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B – MARCH 1989 – REVISED JUNE 1996
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
IOH = –50 mA
VOH
IOH = –4 mA
IOH = –24
24 mA
IOH = –75 mA†
IOL = 12 mA
IOL = 24 mA
IOZ
II
ICC
Ci
Co
TA = 25°C
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
4.8
5.5 V
IOL = 50 mA
VOL
MIN
MAX
UNIT
V
3.85
3V
0.1
0.1
4.5 V
0.1
0.1
5.5 V
0.1
0.1
3V
0.36
0.44
4.5 V
0.36
0.44
5.5 V
0.36
0.44
V
IOL = 75 mA†
VO = VCC or GND
5.5 V
5.5 V
±0.5
±5
mA
VI = VCC or GND
VI = VCC or GND,
5.5 V
±0.1
±1
mA
5.5 V
8
80
mA
IO = 0
VI = VCC or GND
VO = VCC or GND
1.65
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.
switching characteristics over recommended operating free-air temperature range,
VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
4
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
tPLH
tPHL
A or B
Y
tPLH
tPHL
A/B
Any Y
tPZH
tPZL
OE
Any Y
tPHZ
tPLZ
OE
Any Y
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MIN
TA = 25°C
TYP
MAX
MIN
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
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B – MARCH 1989 – REVISED JUNE 1996
switching characteristics, over recommended operating free-air temperature range,
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
tPLH
tPHL
A or B
Y
tPLH
tPHL
A/B
Any Y
tPZH
tPZL
OE
Any Y
tPHZ
tPLZ
OE
Any Y
MIN
TA = 25°C
TYP
MAX
MIN
MAX
1.5
3.6
5.8
1.5
6.4
1.5
4.1
6.5
1.5
7.2
1.5
4
6.5
1.5
7.2
1.5
4.4
7.1
1.5
7.9
1.5
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
UNIT
ns
ns
ns
ns
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER
Cpd
d
TEST CONDITIONS
Outputs enabled
Power dissipation capacitance
Outputs disabled
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• DALLAS, TEXAS 75265
CL = 50 pF,
pF
f = 1 MHz
TYP
37
11
UNIT
pF
5
74AC11257
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/MULTIPLEXER
WITH 3-STATE OUTPUTS
SCAS049B – MARCH 1989 – REVISED JUNE 1996
PARAMETER MEASUREMENT INFORMATION
2 × VCC
S1
500 Ω
From Output
Under Test
Open
GND
TEST
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
2 × VCC
GND
500 Ω
CL = 50 pF
(see Note A)
LOAD CIRCUIT
VCC
50%
50%
0V
Input
tPHL
tPLH
In-Phase
Output
50% VCC
VOH
50% VCC
VOL
50% VCC
VOH
50% VCC
VOL
VCC
Output
Waveform 2
S1 at GND
(see Note B)
50%
50%
0V
tPZL
[ VCC
tPLZ
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
tPLH
tPHL
Out-of-Phase
Output
Output
Control
(low-level
enabling)
50% VCC
VOL
tPHZ
tPZH
VOLTAGE WAVEFORMS
20% 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
6
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