SN54LVTH373, SN74LVTH373
3.3-V ABT OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS689E – MAY 1997 – REVISED APRIL 1999
SN54LVTH373 . . . J OR W PACKAGE
SN74LVTH373 . . . DB, DW, OR PW PACKAGE
(TOP VIEW)
State-of-the-Art Advanced BiCMOS
Technology (ABT) Design for 3.3-V
Operation and Low Static-Power
Dissipation
OE
1Q
V
CC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
I
and Power-Up 3-State Support Hot
off
8Q
8D
7D
Insertion
1D
2D
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
2Q
3Q
16 7Q
15 6Q
14
13
12
11
3D
4D
4Q
GND
6D
5D
5Q
LE
Support Mixed-Mode Signal Operation
(5-V Input and Output Voltages With
3.3-V V
)
CC
Support Unregulated Battery Operation
Down to 2.7 V
SN54LVTH373 . . . FK PACKAGE
(TOP VIEW)
Typical V
< 0.8 V at V
(Output Ground Bounce)
OLP
= 3.3 V, T = 25°C
CC
A
Latch-Up Performance Exceeds 500 mA Per
JESD 17
3
2
1 20 19
18
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
2D
2Q
3Q
3D
4D
8D
7D
7Q
6Q
4
5
6
7
8
17
16
15
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK),
Ceramic Flat (W) Package, and Ceramic (J)
DIPs
14 6D
9 10 11 12 13
description
These octal latches are designed specifically for low-voltage (3.3-V) V
provide a TTL interface to a 5-V system environment.
operation, but with the capability to
CC
While the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the
Q outputs are latched at the logic levels set up at the D inputs.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high
or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive
the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus
lines without need for interface or pullup components.
OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered
while the outputs are in the high-impedance state.
When V is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down.
CC
However, to ensure the high-impedance state above 1.5 V, OE should be tied to V
through a pullup resistor;
CC
the minimum value of the resistor is determined by the current-sinking capability of the driver.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
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.
Copyright 1999, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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.
1
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