74VCX16373
Low−Voltage 1.8/2.5/3.3V
16−Bit Transparent Latch
With 3.6 V−Tolerant Inputs and Outputs
(3−State, Non−Inverting)
The 74VCX16373 is an advanced performance, non−inverting
16−bit transparent latch. It is designed for very high−speed, very
low−power operation in 1.8 V, 2.5 V or 3.3 V systems. The
VCX16373 is byte controlled, with each byte functioning identically,
but independently. Each byte has separate Output Enable and Latch
Enable inputs. These control pins can be tied together for full 16−bit
operation.
When operating at 2.5 V (or 1.8 V) the part is designed to tolerate
voltages it may encounter on either inputs or outputs when interfacing
to 3.3 V busses. It is guaranteed to be overvoltage tolerant to 3.6 V.
The 74VCX16373 contains 16 D−type latches with 3−state
3.6 V−tolerant outputs. When the Latch Enable (LEn) inputs are
HIGH, data on the Dn inputs enters the latches. In this condition, the
latches are transparent, (a latch output will change state each time its
D input changes). When LE is LOW, the latch stores the information
that was present on the D inputs a setup time preceding the
HIGH−to−LOW transition of LE. The 3−state outputs are controlled
by the Output Enable (OEn) inputs. When OE is LOW, the outputs are
enabled. When OE is HIGH, the standard outputs are in the high
impedance state, but this does not interfere with new data entering into
the latches.
Features
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MARKING DIAGRAM
48
48
1
VCX16373
AWLYYWW
TSSOP−48
DT SUFFIX
CASE 1201
A
WL
YY
WW
1
= Assembly Location
= Wafer Lot
= Year
= Work Week
PIN NAMES
Pins
OEn
LEn
D0−D15
O0−O15
Function
Output Enable Inputs
Latch Enable Inputs
Inputs
Outputs
•
Designed for Low Voltage Operation: V
CC
= 1.65 V
−
3.6 V
•
3.6 V Tolerant Inputs and Outputs
•
High Speed Operation:3.0 ns max for 3.0 V to 3.6 V
•
•
•
•
•
•
•
3.9 ns max for 2.3 V to 2.7 V
6.8 ns max for 1.65 V to 1.95 V
Static Drive:
±24
mA Drive at 3.0 V
±18
mA Drive at 2.3 V
±6
mA Drive at 1.65 V
Supports Live Insertion and Withdrawal
I
OFF
Specification Guarantees High Impedance When V
CC
= 0 V
Near Zero Static Supply Current in All Three Logic States (20
mA)
Substantially Reduces System Power Requirements
Latchup Performance Exceeds
±250
mA @ 125°C
ESD Performance: Human Body Model >2000 V;
Machine Model >200 V
All Devices in Package TSSOP are Inherently Pb−Free*
ORDERING INFORMATION
Device
74VCX16373DT
74VCX16373DTR
Package
TSSOP
(Pb−Free)
TSSOP
(Pb−Free)
Shipping
†
39 / Rail
2500 / Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2006
June, 2006
−
Rev. 6
1
Publication Order Number:
74VCX16373/D
74VCX16373
TRUTH TABLE
Inputs
LE1
X
H
H
L.
OE1
H
L
L
L
D0:7
X
L
H
X
Outputs
O0:7
Z
L
H
O0
LE2
X
H
H
L
Inputs
OE2
H
L
L
L
D8:15
X
L
H
X
Outputs
O8:15
Z
L
H
O0
H = High Voltage Level
L = Low Voltage Level
Z = High Impedance State
X = High or Low Voltage Level and Transitions Are Acceptable, for I
CC
reasons, DO NOT FLOAT Inputs
O0 = No Change
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
STG
DC Supply Voltage
DC Input Voltage
DC Output Voltage
Parameter
Value
−0.5
to +4.6
−0.5
≤
V
I
≤
+4.6
−0.5
≤
V
O
≤
+4.6
−0.5
≤
V
O
≤
V
CC
+ 0.5
DC Input Diode Current
DC Output Diode Current
−50
−50
+50
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
±50
±100
±100
−65
to +150
Output in 3−State
Note 1; Outputs Active
V
I
< GND
V
O
< GND
V
O
> V
CC
mA
mA
mA
°C
mA
mA
Condition
Unit
V
V
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. I
O
absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
I
OH
I
OL
I
OH
I
OL
I
OH
I
OL
T
A
Dt/DV
Supply Voltage
Input Voltage
Output Voltage
HIGH Level Output Current, V
CC
= 3.0 V
−
3.6 V
LOW Level Output Current, V
CC
= 3.0 V
−
3.6 V
HIGH Level Output Current, V
CC
= 2.3 V
−
2.7 V
LOW Level Output Current, V
CC
= 2.3 V
−
2.7 V
HIGH Level Output Current, V
CC
= 1.65 V
−
1.95 V
LOW Level Output Current, V
CC
= 1.65 V
−
1.95 V
Operating Free−Air Temperature
Input Transition Rise or Fall Rate, V
IN
from 0.8 V to 2.0 V, V
CC
= 3.0 V
−40
0
(Active State)
(3−State)
Parameter
Operating
Data Retention Only
Min
1.65
1.2
−0.3
0
0
Typ
3.3
3.3
Max
3.6
3.6
3.6
V
CC
3.6
−24
24
−18
18
−6
6
+85
10
Unit
V
V
V
mA
mA
mA
mA
mA
mA
°C
ns/V
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