Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHCT157
CMOS IC
QUADRUPLE 2-LINE TO 1-LINE
DATA SELECTOR/
MULTIPLEXER
„
DESCRIPTION
The U74AHCT157 is a quadruple 2-line to 1-line data
selector/multiplexer. When G is high, all outputs are low. When G
is low, a 4-bit word is selected from one of two sources and is routed
to the four outputs. The devices provide true data.
„
FEATURES
* TTL-Voltage Compatible
* Max tPD of 4.1ns from A or B to Y at 5V, CL=15pF
* Low Quiescent Current: ICC = 2 μA (MAX) at 5.5V
* ±8 mA output driver at 5V
„
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74AHCT157L-P16-R
U74AHCT157G-P16-R
U74AHCT157L-P16-T
U74AHCT157G-P16-T
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Copyright © 2011 Unisonic Technologies Co., Ltd
Package
Packing
TSSOP-16
TSSOP-16
Tape Reel
Tube
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QW-R502-652.A
U74AHCT157
CMOS IC
„
PIN CONFIGURATION
„
FUNCTION TABLE
INPUTS
G
H
L
L
L
L
„
A/B
X
L
L
H
H
A
B
OUTPUTS
Y
X
L
H
X
X
X
X
X
L
H
L
L
H
L
H
LOGIC DIAGRAM
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U74AHCT157
„
CMOS IC
ABSOLUTE MAXIMUM RATING (TA =25°C ,unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage Range
VCC
-0.5~7
V
Input Voltage Range
VIN
-0.5~7
V
Output Voltage Range
VOUT
-0.5~VCC +0.5
V
Input Clamp Current (VIN<0)
IIK
-20
mA
Output Clamp Current (VOUT<0, or VOUT>VCC)
IOK
±20
mA
Output Current
IOUT
±25
mA
VCC or GND Current
ICC
±50
mA
Storage Temperature
TSTG
-65 ~ +150
°C
Note: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
„
RECOMMENDED OPERATING COMDITIONS
PARAMETER
Supply Voltage
High-Level Input Voltage
Low-Level Input Voltage
Input Voltage
Output Voltage
High-Level Output Current
Low-Level Output Current
Input Rise or Fall Times
Operating Temperature
„
SYMBOL
VCC
VIH
VIL
VIN
VOUT
IOH
IOL
Δt/Δv
TA
RATINGS
4.5 ~ 5.5
2
0.8
0 ~ 5.5
0 ~ VCC
-8
8
20
-40 ~ 85
UNIT
V
V
V
V
V
mA
mA
ns/V
℃
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
Output Voltage High-Level
VOH
Output Voltage Low-Level
VOL
Input Leakage Current
Quiescent Supply Current
II(LEAK)
ICC
Additional quiescent supply current
ΔICC
Input Capacitance
CI
TEST CONDITIONS
VCC=4.5V, IOH=-50μA
VCC=4.5V, IOH=-8mA
VCC=4.5V, IOL=50μA
VCC=4.5V, IOL=8mA
VCC=0V to 5.5V, VIN=0 or 5.5V
VCC=5.5V, VIN=VCC or GND, IOUT=0
VCC=5.5V, one input at 3.4V,
Other inputs at VCC or GND
VCC=5V, VIN=VCC or GND
UNISONIC TECHNOLOGIES CO., LTD
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MIN
4.4
3.94
TYP
4.5
2
MAX
UNIT
V
0.1
0.36
±0.1
2
μA
μA
1.35
mA
10
pF
V
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SWITCHING CHARACTERISTICS (VCC = 5V ± 0.5V, TA =25°C)
PARAMETER
Propagation delay from input A or B
to output Y, tPD
Propagation delay from input A / B
to output Y, tPD
Propagation delay from input G to
output Y, tPD
„
CMOS IC
SYMBOL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
TEST CONDITIONS
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
CL=15pF, RL=1kΩ
CL=50pF, RL=1kΩ
MIN
TYP
4.1
5.6
4.1
5.6
5.3
6.8
5.3
6.8
5.6
7.1
5.6
7.1
MAX
6.4
8.7
6.4
8.7
8.1
10.4
8.1
10.4
8.6
11
8.6
11
UNIT
ns
ns
ns
ns
ns
ns
OPERATING CHARACTERISTICS (TA =25°C)
PARAMETER
Power dissipation capacitance
SYMBOL
TEST CONDITIONS
CPD
VCC = 5V, f=1MHz, No load
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RATINGS
11
UNIT
pF
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CMOS IC
TEST CIRCUIT AND WAVEFORMS
VCC
5V±0.5V
Input
VIN
tR, tF
VCC
≤3ns
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
VLOAD
GND
VM
VLOAD
CL
RL
VΔ
VCC/2
VCC
15pF
50pF
1kΩ
0.5V
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„
CMOS IC
TEST CIRCUIT AND WAVEFORMS(Cont.)
Notes: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, ZO = 50Ω.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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