Datasheet

ManualsBrandsFAIRCHILD SEMICONDUCTOR ManualsLogic ICsLogic IC - Buffer, driver TSSOP 20

November 1988

Revised March 2005

74AC540 Octal Buffer/Line Driver with 3-STATE Outputs

74AC540

Octal Buffer/Line Driver with 3-STATE Outputs

General Description

The AC540 is an octal buffer/line drivers designed to be

employed as memory and address drivers, clock drivers

and bus oriented transmitter/receivers.

These devices are similar in function to the AC240 while

providing flow-through architecture (inputs on opposite side

from outputs). This pinout arrangement makes these

devices especially useful as output ports for microproces-

sors, allowing ease of layout and greater PC board density.

Features

■ I

and I

reduced by 50%

■ 3-STATE inverting outputs

■ Inputs and outputs opposite side of package, allowing

easier interface to microprocessors

■ Output source/sink 24 mA

Ordering Code:

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Pb-Free package per JEDEC J-STD-020B.

Logic Symbol

IEEE/IEC

Connection Diagram

Truth Table

H HIGH Voltage Level X Immaterial

LOW Voltage Level Z High Impedance

FACT

is a trademark of Fairchild Semiconductor Corporation.

Order Number Package Number Package Description

74AC540SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

74AC540SJ M20D Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74AC540MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74AC540PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

Inputs Outputs

LLH L

HXX Z

XHX Z

LLL H

Summary of content (7 pages)

PAGE 1
Revised March 2005 74AC540 Octal Buffer/Line Driver with 3-STATE Outputs General Description Features The AC540 is an octal buffer/line drivers designed to be employed as memory and address drivers, clock drivers and bus oriented transmitter/receivers. ■ ICC and IOZ reduced by 50% These devices are similar in function to the AC240 while providing flow-through architecture (inputs on opposite side from outputs).
PAGE 2
74AC540 Absolute Maximum Ratings(Note 1) Recommended Operating Conditions 0.5V to 7.0V Supply Voltage (VCC) DC Input Diode Current (IIK) VI VI 0.5V VCC 0.5V DC Input Voltage (VI) Supply Voltage (VCC) 20 mA 20 mA 0.5V to VCC 0.5V VO 0.5V VCC 0.5V DC Output Voltage (VO) 0V to VCC Output Voltage (VO) 0V to VCC 40qC to 85qC Operating Temperature (TA) Minimum Input Edge Rate ('V/'t) DC Output Diode Current (IOK) VO 2.0V to 6.0V Input Voltage (VI) 20 mA 20 mA 0.5V to VCC 0.
PAGE 3
Symbol Parameter VCC TA 25qC (V) CL 50 pF (Note 5) tPLH tPHL tPZH tPZL Max Min 50 pF 3.3 1.5 5.5 7.5 1.0 8.0 5.0 1.5 4.0 6.0 1.0 6.5 Propagation Delay 3.3 1.5 5.0 7.0 1.0 7.5 Data to Output 5.0 1.5 4.0 5.5 1.0 6.0 Output Enable Time 3.3 3.0 8.5 11.0 2.5 12.0 5.0 2.0 6.5 8.5 2.0 9.5 3.3 2.5 7.5 10.0 2.0 11.0 5.0 2.0 6.0 7.5 1.5 8.5 3.3 2.5 8.5 13.0 1.5 14.0 5.0 1.5 7.5 10.5 1.0 11.0 3.3 2.5 7.0 10.0 2.0 11.0 5.0 1.5 6.0 8.
PAGE 4
74AC540 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B www.fairchildsemi.
PAGE 5
74AC540 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D 5 www.fairchildsemi.
PAGE 6
74AC540 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 www.fairchildsemi.
PAGE 7
4AC540 Octal Buffer/Line Driver with 3-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Package Number N20A Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.