1
EXTENDED COMMERCIAL TEMPERATURE RANGE
IDT74LVC157A
3.3V CMOS QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR
FEBRUARY 2000
1999 Integrated Device Technology, Inc.
DSC-4721/-
c
IDT74LVC157A
EXTENDED COMMERCIAL TEMPERATURE RANGE
DESCRIPTION:
This quadruple 2-line to 1-line data selector/multiplexer is built using
advanced dual metal CMOS technology. The LVC157A 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.
Inputs can be driven from either 3.3V or 5V devices. This feature allows
the use of this device as a translator in a mixed 3.3V/5V supply system.
The LVC157A has been designed with a 24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
FUNCTIONAL BLOCK DIAGRAM
3.3V CMOS QUADRUPLE
2-LINE TO 1-LINE DATA
SELECTOR/MULTIPLEXER,
5 VOLT TOLERANT I/O
FEATURES:
0.5 MICRON CMOS Technology
ESD > 2000V per MIL-STD-883, Method 3015;
> 200V using machine model (C = 200pF, R = 0)
1.27mm pitch SOIC, 0.635mm pitch QSOP,
0.65mm pitch SSOP, 0.65mm pitch TSSOP packages
Extended commercial range of 40C to +85C
V
CC
= 3.3V 0.3V, Normal Range
V
CC
= 2.3V to 3.6V, Extended Range
CMOS power levels (0.4 W typ. static)
Rail-to-Rail output swing for increased noise margin
All inputs, outputs and I/O are 5 Volt tolerant
Supports hot insertion
Drive Features for LVC157A:
High Output Drivers: 24mA
Reduced system switching noise
1Y
4
1A
2Y
7
3Y
9
4Y
12
1B
2A
2B
3A
3B
4A
4B
2
3
5
6
11
10
14
13
G
A/B
1
15
APPLICATIONS:
5V and 3.3V mixed voltage systems
Data communication and telecommunication systems
2
EXTENDED COMMERCIAL TEMPERATURE RANGE
IDT74LVC157A
3.3V CMOS QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR
CAPACITANCE
(T
A
= +25C, f = 1.0MH
Z
)
Symbol
Parameter
(1)
Conditions
Typ.
Max.
Unit
C
IN
Input Capacitance
V
IN
= 0V
4.5
6
pF
C
OUT
Output
Capacitance
V
OUT
= 0V
5.5
8
pF
C
I/O
I/O Port
Capacitance
V
IN
= 0V
6.5
8
pF
LVC QUAD Link
NOTE:
1. As applicable to the device type.
SOIC/ SSOP/ TSSOP/ QSOP
TOP VIEW
S O16-7
S O16-8
S O16-9
S O16-10
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
V
C C
A /B
1
A
G
1
B
1
Y
2
A
2
B
2
Y
G ND
4
A
4
B
4
Y
3
A
3
B
3
Y
PIN CONFIGURATION
PIN DESCRIPTION
Pin Names
Description
A/B
Select Input (Active LOW)
G
Common Strobe Input (Active LOW)
xY
Data Output
xA, xB
Data Inputs
FUNCTION TABLE
(1)
Inputs
Outputs
G
A/B
xA
xB
xY
H
X
X
X
L
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
Max.
Unit
V
TERM
Terminal Voltage with Respect to GND
0.5 to +6.5
V
T
STG
Storage Temperature
65 to +150
C
I
OUT
DC Output Current
50 to +50
mA
I
IK
I
OK
Continuous Clamp Current,
V
I
< 0 or V
O
< 0
50
mA
I
CC
I
SS
Continuous Current through
each V
CC
or GND
100
mA
LVC QUAD Link
NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or
any other conditions above those indicated in the operational sections
of this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect reliability.
3
EXTENDED COMMERCIAL TEMPERATURE RANGE
IDT74LVC157A
3.3V CMOS QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR
1998 Integrated Device Technology, Inc.
DSC-123456
c
OUTPUT DRIVE CHARACTERISTICS
Symbol
Parameter
Test Conditions
(1)
Min.
Max.
Unit
V
OH
Output HIGH Voltage
V
CC
= 2.3V to 3.6V
I
OH
= 0.1mA
V
CC
0.2
--
V
V
CC
= 2.3V
I
OH
= 6mA
2
--
V
CC
= 2.3V
I
OH
= 12mA
1.7
--
V
CC
= 2.7V
2.2
--
V
CC
= 3.0V
2.4
--
V
CC
= 3.0V
I
OH
= 24mA
2.2
--
V
OL
Output LOW Voltage
V
CC
= 2.3V to 3.6V
I
OL
= 0.1mA
--
0.2
V
V
CC
= 2.3V
I
OL
= 6mA
--
0.4
I
OL
= 12mA
--
0.7
V
CC
= 2.7V
I
OL
= 12mA
--
0.4
V
CC
= 3.0V
I
OL
= 24mA
--
0.55
LVC QUAD Link
NOTE:
1. V
IH
and V
IL
must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the
appropriate V
CC
range. T
A
= 40C to +85C.
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= 40c to +85c
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
V
IH
Input HIGH Voltage Level
V
CC
= 2.3V to 2.7V
1.7
--
--
V
V
CC
= 2.7V to 3.6V
2
--
--
V
IL
Input LOW Voltage Level
V
CC
= 2.3V to 2.7V
--
--
0.7
V
V
CC
= 2.7V to 3.6V
--
--
0.8
I
IH
I
IL
Input Leakage Current
V
CC
= 3.6V
V
I
= 0 to 5.5V
--
--
5
A
I
OZH
High Impedance Output Current
V
CC
= 3.6V
V
O
= 0 to 5.5V
--
--
10
A
I
OZL
(3-State Output pins)
I
OFF
Input/Output Power Off Leakage
V
CC
= 0V, V
IN
or V
O
5.5V
--
--
50
A
V
IK
Clamp Diode Voltage
V
CC
= 2.3V, I
IN
= 18mA
--
0.7
1.2
V
V
H
Input Hysteresis
V
CC
= 3.3V
--
100
--
mV
I
CCL
I
CCH
Quiescent Power Supply Current
V
CC
= 3.6V
V
IN
= GND or V
CC
--
--
10
A
I
CCZ
I
CC
Quiescent Power Supply
Current Variation
One input at V
CC
0.6V
other inputs at V
CC
or
GND
--
--
500
A
LVC QUAD Link
NOTE:
1. Typical values are at V
CC
= 3.3V, +25C ambient.
4
EXTENDED COMMERCIAL TEMPERATURE RANGE
IDT74LVC157A
3.3V CMOS QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR
OPERATING CHARACTERISTICS, VCC = 3.3V
0.3V, TA = 25C
Symbol
Parameter
Test Conditions
Typical
Unit
C
PD
Power Dissipation Capacitance
C
L
= 0pF, f = 10Mhz
16
pF
SWITCHING CHARACTERISTICS
(1)
V
CC
= 2.5V0.2V
V
CC
= 2.7V
V
CC
= 3.3V0.3V
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
t
PLH
t
PHL
Propagation Delay
xA or xB to xY
--
--
--
5.9
1
5.2
ns
t
PLH
t
PHL
Propagation Delay
A/B to xY
--
--
--
8.1
1
6.8
ns
t
PLH
t
PHL
Propagation Delay
G to xY
--
--
--
7.8
1
6.5
ns
t
SK
(o)
Output Skew
(2)
--
--
--
--
--
1
ns
NOTES:
1. See test circuits and waveforms. T
A
= 40C to + 85C.
2. Skew between any two outputs of the same package and switching in the same direction.
5
EXTENDED COMMERCIAL TEMPERATURE RANGE
IDT74LVC157A
3.3V CMOS QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR
O pen
V
LO AD
G N D
V
CC
Pulse
G enerator
D .U .T .
500
500
C
L
R
T
V
IN
V
O UT
(1, 2)
L V C Q U A D L in k
IN PU T
V
IH
0V
V
O H
V
O L
t
PLH1
t
SK
(x)
O U TP U T 1
O U TP U T 2
t
PH L1
t
SK
(x)
t
PLH2
t
PH L2
V
T
V
T
V
O H
V
T
V
O L
t
SK
(x)
= t
PL H2
-
t
P LH1
or
t
PH L2
-
t
P HL1
LV C Q U A D L in k
D A TA
IN PU T
0V
0V
0V
0V
t
REM
TIM IN G
IN PU T
AS YN C H RO N O U S
C O N TR O L
SY N C H RO N O U S
C O N TR O L
t
S U
t
H
t
S U
t
H
V
IH
V
T
V
IH
V
T
V
IH
V
T
V
IH
V
T
LO W -H IG H -LO W
PU LSE
H IG H -LO W -H IG H
PU LSE
V
T
t
W
SA M E PH AS E
IN PU T TR AN S ITIO N
O PPO SITE P H AS E
IN PU T TR AN S ITIO N
0V
0V
V
O H
V
O L
t
PLH
t
PH L
t
PH L
t
PLH
O U TPU T
V
T
V
IH
V
T
V
T
V
IH
V
T
C O N TR O L
IN PU T
t
PLZ
0V
O U TPU T
N O R M ALLY
LO W
t
PZH
0V
SW ITCH
CL O SE D
O U TPU T
N O R M ALLY
H IG H
EN ABLE
D ISAB LE
SW ITCH
OP EN
t
PH Z
0V
V
LZ
V
O H
V
T
V
T
t
PZL
V
LO AD/2
V
LO AD/2
V
IH
V
T
V
O L
V
HZ
LV C Q U A D L in k
L V C Q U A D L in k
LV C Q U A D L in k
LV C Q U A D L in k
TEST CIRCUITS AND WAVEFORMS
TEST CONDITIONS
PROPAGATION DELAY
TEST CIRCUITS FOR ALL OUTPUTS
ENABLE AND DISABLE TIMES
SET-UP, HOLD, AND RELEASE TIMES
SWITCH POSITION
OUTPUT SKEW - tsk (x)
PULSE WIDTH
Symbol
V
CC
(1)
= 2.5V 0.2V
V
CC
(2)
= 3.3V 0.3V & 2.7V
Unit
V
LOAD
2 x Vcc
6
V
V
IH
Vcc
2.7
V
V
T
V
CC
/ 2
1.5
V
V
LZ
150
300
mV
V
HZ
150
300
mV
C
L
30
50
pF
LVC QUAD Link
DEFINITIONS:
C
L
=
Load capacitance: includes jig and probe capacitance.
R
T
=
Termination resistance: should be equal to Z
OUT
of the Pulse
Generator.
NOTES:
1. Pulse Generator for All Pulses: Rate
10MHz; t
F
2ns; t
R
2ns.
2. Pulse Generator for All Pulses: Rate
10MHz; t
F
2.5ns; t
R
2.5ns.
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control
Disable-HIGH.
Test
Switch
Open Drain
Disable Low
Enable Low
V
LOAD
Disable High
Enable High
GND
All Other tests
Open
LVC QUAD Link
NOTES:
1. For t
SK
(o) OUTPUT1 and OUTPUT2 are any two outputs.
2. For t
SK
(b) OUTPUT1 and OUTPUT2 are in the same bank.
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