Datasheet

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SN54HCT540, SN74HCT540

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SCLS008C – MARCH 1984 – REVISED MARCH 2003

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Operating Voltage Range of 4.5 V to 5.5 V

Low Power Consumption, 80-µA Max I

Typical t

= 12 ns

±6-mA Output Drive at 5 V

Low Input Current of 1 µA Max

Inputs Are TTL-Voltage Compatible

High-Current 3-State Outputs Interface

Directly With System Bus or Can Drive Up

To 15 LSTTL Loads

Data Flow-Through Pinout (All Inputs on

Opposite Side From Outputs)

description/ordering information

These octal buffers and line drivers are designed to have the performance of the ’HCT240 devices and a pinout

with inputs and outputs on opposite sides of the package. This arrangement greatly facilitates printed circuit

board layout.

The 3-state control gate is a 2-input NOR. If either output-enable (OE1

or OE2) input is high, all eight outputs

are in the high-impedance state. The ’HCT540 devices provide inverted data at the outputs.

To ensure the high-impedance state during power up or power down, OE

should be tied to V

through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

ORDERING INFORMATION

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP – N Tube SN74HCT540N SN74HCT540N

–40°C to 85°C

SOIC DW

Tube SN74HCT540DW

HCT540

SOIC

–

Tape and reel SN74HCT540DWR

HCT540

–55°C to 125°C CDIP – J Tube SNJ54HCT540J SNJ54HCT540J

†

Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

FUNCTION TABLE

(each buffer/driver)

INPUTS

OUTPUT

OE1 OE2

L L L H

L LH L

H XX Z

X H X Z

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.

OE1

GND

OE2

SN54HCT540 ...J PACKAGE

SN74HCT540 . . . DW OR N PACKAGE

(TOP VIEW)

PRODUCTION DATA information is 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.

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.

Summary of content (14 pages)

PAGE 1
SN54HCT540, SN74HCT540 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SCLS008C – MARCH 1984 – REVISED MARCH 2003 D D D D D D D D Operating Voltage Range of 4.5 V to 5.5 V Low Power Consumption, 80-µA Max ICC Typical tpd = 12 ns ±6-mA Output Drive at 5 V Low Input Current of 1 µA Max Inputs Are TTL-Voltage Compatible High-Current 3-State Outputs Interface Directly With System Bus or Can Drive Up To 15 LSTTL Loads Data Flow-Through Pinout (All Inputs on Opposite Side From Outputs) SN54HCT540 . . .
PAGE 2
SN54HCT540, SN74HCT540 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SCLS008C – MARCH 1984 – REVISED MARCH 2003 logic diagram (positive logic) OE1 OE2 A1 1 19 2 18 Y1 To Seven Other Channels absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.
PAGE 3
SN54HCT540, SN74HCT540 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SCLS008C – MARCH 1984 – REVISED MARCH 2003 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC VOH VI = VIH or VIL IOH = –20 µA IOH = –6 mA 45V 4.5 VOL VI = VIH or VIL IOL = 20 µA IOL = 6 mA 45V 4.5 II IOZ VI = VCC or 0 VO = VCC or 0, ICC VI = VCC or 0, One input at 0.5 V or 2.
PAGE 4
SN54HCT540, SN74HCT540 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SCLS008C – MARCH 1984 – REVISED MARCH 2003 PARAMETER MEASUREMENT INFORMATION VCC From Output Under Test CL (see Note A) PARAMETER S1 Test Point tPZH ten RL S2 1 kΩ tPZL tPHZ tdis S2 50 pF or 150 pF Open Closed Closed Open 1 kΩ –– LOAD CIRCUIT 2.7 V S1 50 pF tPLZ tpd or tt Input 1.3 V 0.3 V CL RL 2.7 V 50 pF or 150 pF Open Closed Closed Open Open Open 3V 1.3 V 0.
PAGE 5
PACKAGE OPTION ADDENDUM www.ti.
PAGE 6
PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
PAGE 7
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN74HCT540DWR Package Package Pins Type Drawing SOIC DW 20 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2000 330.0 24.4 Pack Materials-Page 1 10.8 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 13.0 2.7 12.0 24.
PAGE 8
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74HCT540DWR SOIC DW 20 2000 367.0 367.0 45.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.