
SN54LVTH540, SN74LVTH540
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS681 – MARCH 1997
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POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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State-of-the-Art Advanced BiCMOS
Technology (ABT) Design for 3.3-V
Operation and Low-Static Power
Dissipation
D
High-Impedance State During Power Up
and Power Down
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Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
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Support Mixed-Mode Signal Operation
(5-V Input and Output Voltages With
3.3-V VCC)
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Support Unregulated Battery Operation
Down to 2.7 V
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Typical VOLP (Output Ground Bounce)
< 0.8 V at VCC = 3.3 V, TA = 25°C
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Power Off Disables Inputs/Outputs,
Permitting Live Insertion
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ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
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Latch-Up Performance Exceeds 500 mA Per
JESD 17
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Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), Thin Shrink Small-Outline (PW), and
Thin Very Small-Outline (DGV) Packages,
Ceramic Chip Carriers (FK), Ceramic Flat
(W) Package, and Ceramic (J) DIPs
description
These octal buffers/drivers are designed specifically for low-voltage (3.3-V) VCC operation, but with the
capability to provide a TTL interface to a 5-V system environment.
The ’LVTH540 are ideal for driving bus lines or buffer memory address registers. These devices feature inputs
and outputs on opposite sides of the package that facilitate printed circuit board layout.
The 3-state control gate is a 2-input AND gate with active-low inputs so that if either output-enable (OE1 or OE2)
input is high, all outputs are in the high-impedance state.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
When VCC is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down.
However , to ensure the high-impedance state above 1.5 V, OE should be tied to VCC through a pullup resistor;
the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN54LVTH540 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74LVTH540 is characterized for operation from –40°C to 85°C.
Copyright 1997, 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.
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.
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OE1
A1
A2
A3
A4
A5
A6
A7
A8
GND
VCC
OE2
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
SN54LVTH540 ...J OR W PACKAGE
SN74LVTH540 . . . DB, DGV, DW, OR PW PACKAGE
(TOP VIEW)
3212019
910111213
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5
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7
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18
17
16
15
14
Y1
Y2
Y3
Y4
Y5
A3
A4
A5
A6
A7
SN54LVTH540 . . . FK PACKAGE
(TOP VIEW)
A2
A1
OE1
Y7
Y6 OE2
A8
GND
Y8 VCC