CD74ACT157
QUADRUPLE 2 LINE TO 1 LINE DATA SELECTOR/MULTIPLEXER
SCHS340B − MARCH 2003 - REVISED JUNE 2003
D
Inputs Are TTL-Voltage Compatible
D
Speed of Bipolar F, AS, and S, With
D
D
D
D
Significantly Reduced Power Consumption
Balanced Propagation Delays
±24-mA
Output Drive Current
− Fanout to 15 F Devices
SCR-Latchup-Resistant CMOS Process and
Circuit Design
Exceeds 2-kV ESD Protection Per
MIL-STD-883, Method 3015
E, M, OR PW PACKAGE
(TOP VIEW)
A /B
1A
1B
1Y
2A
2B
2Y
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
G
4A
4B
4Y
3A
3B
3Y
description/ordering information
This quadruple 2-line to 1-line data selector/multiplexer is designed for 4.5-V to 5.5-V V
CC
operation.
The CD74ACT157 features a common strobe (G) input. When the strobe is high, all outputs are low. When the
strobe is low, a 4-bit word is selected from one of two sources and is routed to the four outputs. The device
provides true data.
ORDERING INFORMATION
TA
PDIP − E
SOIC − M
TSSOP − PW
PACKAGE†
Tube
Tube
−55 C 125°C
−55°C to 125 C
Tape and reel
Tube
Tape and reel
ORDERABLE
PART NUMBER
CD74ACT157E
CD74ACT157M
CD74ACT157M96
CD74ACT157PW
CD74ACT157PWR
HM157
ACT157M
TOP-SIDE
MARKING
CD74ACT157E
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
G
H
L
L
L
L
A/B
X
L
L
H
H
A
X
L
H
X
X
B
X
X
X
L
H
OUTPUT
Y
L
L
H
L
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.
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.
Copyright
2003, Texas Instruments Incorporated
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1
CD74ACT157
QUADRUPLE 2 LINE TO 1 LINE DATA SELECTOR/MULTIPLEXER
SCHS340B − MARCH 2003 - REVISED JUNE 2003
logic diagram (positive logic)
1A
2
4
3
1B
5
7
2B
6
1Y
2A
2Y
3A
11
9
3Y
3B
10
4A
14
12
4Y
4B
13
G
A/B
15
1
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 6 V
Input clamp current, I
IK
(V
I
< 0 V or V
I
> V
CC
) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±20
mA
Output clamp current, I
OK
(V
O
< 0 V or V
O
> V
CC
) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±50
mA
Continuous output current, I
O
(V
O
> 0 V or V
O
< V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±50
mA
Continuous current through V
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±100
mA
Package thermal impedance,
θ
JA
(see Note 2): E package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W
M package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W
PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108°C/W
Storage temperature range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −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
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CD74ACT157
QUADRUPLE 2 LINE TO 1 LINE DATA SELECTOR/MULTIPLEXER
SCHS340B − MARCH 2003 - REVISED JUNE 2003
recommended operating conditions (see Note 3)
TA = 25°C
MIN
VCC
VIH
VIL
VI
VO
IOH
IOL
∆t/∆v
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
Output voltage
High-level output current
Low-level output current
Input transition rise or fall rate
0
0
4.5
2
0.8
VCC
VCC
−24
24
10
0
0
MAX
5.5
−55°C to
125°C
MIN
4.5
2
0.8
VCC
VCC
−24
24
10
0
0
MAX
5.5
−40°C to
85°C
MIN
4.5
2
0.8
VCC
VCC
−24
24
10
MAX
5.5
V
V
V
V
V
mA
mA
ns/V
UNIT
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
µA
IOH = −24 mA
IOH = −50 mA†
IOH = −75 mA†
IOL = 50
µA
VOL
VI = VIH or VIL
IOL = 24 mA
IOL = 50 mA†
IOL = 75 mA†
II
ICC
DI
CC‡
Ci
VI = VCC or GND
VI = VCC or GND,
VI = VCC − 2.1 V
IO = 0
VCC
4.5 V
4.5 V
5.5 V
5.5 V
4.5 V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
4.5 V to 5.5 V
±0.1
8
2.4
10
±1
160
3
10
0.1
0.36
0.1
0.5
1.65
1.65
±1
80
2.8
10
µA
µA
mA
pF
TA = 25°C
MIN
4.4
3.94
MAX
−55°C to
125°C
MIN
4.4
3.7
3.85
3.85
0.1
0.44
V
MAX
−40°C to
85°C
MIN
4.4
3.8
V
MAX
UNIT
VOH
VI = VIH or VIL
† Test one output at a time, not exceeding 1-second duration. Measurement is made by forcing indicated current and measuring voltage to minimize
power dissipation. Test verifies a minimum 50-Ω transmission-line drive capability at 85°C and 75-Ω transmission-line drive capability at 125°C.
‡ Additional quiescent supply current per input pin, TTL inputs high, 1 unit load
ACT INPUT LOADING TABLE
INPUT
A or B
G
A/B
UNIT LOAD
0.37
0.83
1.33
Unit load is
∆I
CC limit specified in
electrical characteristics table
(e.g., 2.4 mA at 25°C).
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CD74ACT157
QUADRUPLE 2 LINE TO 1 LINE DATA SELECTOR/MULTIPLEXER
SCHS340B − MARCH 2003 - REVISED JUNE 2003
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V
±
0.5 V, C
L
= 50 pF (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
FROM
(INPUT)
TO
(OUTPUT)
−55°C to
125°C
MIN
2.4
A or B
A/B
G
Any Y
Any Y
Any Y
2.4
3.6
3.6
3.4
3.4
MAX
9.5
9.5
14.5
14.5
13.5
13.5
−40°C to
85°C
MIN
2.5
2.5
3.8
3.8
3.6
3.6
MAX
8.6
8.6
13.2
13.2
12.3
12.3
ns
ns
ns
UNIT
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER
Cpd
Power dissipation capacitance
TYP
156
UNIT
pF
4
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CD74ACT157
QUADRUPLE 2 LINE TO 1 LINE DATA SELECTOR/MULTIPLEXER
SCHS340B − MARCH 2003 - REVISED JUNE 2003
PARAMETER MEASUREMENT INFORMATION
R1 = 500
Ω
S1
2
×
VCC
Open
GND
R2 = 500
Ω
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
2
×
VCC
GND
From Output
Under Test
CL = 50 pF
(see Note A)
tw
3V
LOAD CIRCUIT
Input
1.5 V
VOLTAGE WAVEFORMS
PULSE DURATION
3V
1.5 V
0V
tsu
Data
Input
1.5 V
10%
90%
tr
th
90%
3V
1.5 V
10% 0 V
tf
1.5 V
0V
CLR
Input
3V
1.5 V
0V
trec
3V
Reference
Input
CLK
1.5 V
0V
VOLTAGE WAVEFORMS
RECOVERY TIME
3V
VOLTAGE WAVEFORMS
SETUP AND HOLD AND INPUT RISE AND FALL TIMES
Input
1.5 V
tPLH
1.5 V
0V
tPHL
90%
tr
90%
VOH
50% VCC
10%
VOL
tf
90%
tr
VOH
VOL
Output
Control
tPZL
3V
1.5 V
1.5 V
0V
tPLZ
20% VCC
tPZH
≈V
CC
20% VCC
VOL
tPHZ
80% VCC
VOH
80% VCC
≈0
V
In-Phase
Output
50%
10%
tPHL
Output
Waveform 1
S1 at 2
×
VCC
(see Note B)
Output
Waveform 2
S1 at GND
(see Note B)
tPLH
50% VCC
10%
tf
50%
10%
Out-of-Phase
Output
90%
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
VOLTAGE WAVEFORMS
OUTPUT ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and test-fixture 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.
Phase relationships between waveforms are arbitrary.
D. For clock inputs, fmax is measured with the input duty cycle at 50%.
E. The outputs are measured one at a time with one input transition per measurement.
F. tPLH and tPHL are the same as tpd.
G. tPZL and tPZH are the same as ten.
H. tPLZ and tPHZ are the same as tdis.
I. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
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