74VHC541MTC - National Semiconductor

TL/F/11639

74VHC541 Octal Buffer/Line Driver with TRI-STATE Outputs

November 1995

74VHC541

Octal Buffer/Line Driver with TRI-STATEÉOutputs

General Description

The VHC541 is an advanced high-speed CMOS device fab-

ricated with silicon gate CMOS technology. It achieves the

high-speed operation similar to equivalent Bipolar Schottky

TTL while maintaining the CMOS low power dissipation.

The VHC541 is an octal buffer/line driver designed to be

employed as memory and address drivers, clock drivers and

bus oriented transmitter/receivers.

This device is similar in function to the VHC244 while provid-

ing flow-through architecture (inputs on opposite side from

outputs). This pinout arrangement makes this device espe-

cially useful as an output port for microprocessors, allowing

ease of layout and greater PC board density.

An input protection circuit insures that 0V to 7V can be ap-

plied to the input pins without regard to the supply voltage.

This device can be used to interface 5V to 3V systems and

two supply systems such as battery backup. This circuit pre-

vents device destruction due to mismatched supply and in-

put voltages.

Features

YLow power dissipation:

ICC e4mA (max) at TAe25§C

YHigh noise immunity: VNIH eVNIL e28% VCC (min)

YAll inputs are equipped with a power down protection

function

YBalanced propagation delays: tPLH jtPHL

YLow noise: VOLP e0.9V (typ)

YPin and function compatible with 74HC541

Commercial Package Number Package Description

74VHC541M M20B 20-Lead Molded JEDEC SOIC

74VHC541SJ M20D 20-Lead Molded EIAJ SOIC

74VHC541MTC MTC20 20-Lead Molded JEDEC Type 1 TSSOP

74VHC541N N20A 20-Lead Molded DIP

Note: Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter ‘‘X’’ to the ordering code.

Logic Symbol

IEEE/IEC

TL/F/11639–1

Connection Diagram

Pin Assignment for DIP,

TSSOP and SOIC

TL/F/11639–2

Truth Table

Inputs Outputs

OE1OE2I

LLH H

HXX Z

XHX Z

LLL L

HIGH Voltage Level

LeLOW Voltage Level

XeImmaterial

ZeHigh Impedance

TRI-STATEÉis a registered trademark of National Semiconductor Corporation.

C1995 National Semiconductor Corporation RRD-B30M125/Printed in U. S. A.

Absolute Maximum Ratings (Note 1)

Supply Voltage (VCC)b0.5V to a7.0V

DC Input Voltage (VIN)b0.5V to a7.0V

DC Output Voltage (VOUT)b0.5V to VCC a0.5V

Input Diode Current (IIK)b20 mA

Output Diode Current (IOK)g20 mA

DC Output Current (IOUT)g25 mA

DC VCC/GND Current (ICC)g75 mA

Storage Temperature (TSTG)b65§Ctoa

150§C

Lead Temperature (TL)

(Soldering, 10 seconds) 260§C

Note 1:

Absolute Maximum Ratings are values beyond

which the device may be damaged or have its useful life

impaired. The databook specifications should be met, with-

out exception, to ensure that the system design is reliable

over its power supply, temperature, and output/input load-

ing variables. National does not recommend operation out-

side databook specifications.

Recommended Operating

Conditions

Supply Voltage (VCC) 2.0V to a5.5V

Input Voltage (VIN)0Vto

5.5V

Output Voltage (VOUT) 0VtoV

Operating Temperature (TOPR)b40§Ctoa

85§C

Input Rise and Fall Time (tr,t

)

CC e3.3V g0.3V 0 E100 ns/V

VCC e5.0V g0.5V 0 E20 ns/V

DC Characteristics for ’VHC Family Devices

Symbol Parameter VCC

(V)

74VHC

Units Conditions

TAe25§CTAeb

40§C

to a85§C

Min Typ Max Min Max

VIH High Level Input 2.0 1.50 1.50 V

Voltage 3.0– 5.5 0.7 VCC 0.7 VCC

VIL Low Level Input 2.0 0.50 0.50 V

Voltage 3.0– 5.5 0.3 VCC 0.3 VCC

VOH High Level Output 2.0 1.9 2.0 1.9 VIN eVIH IOH eb

50 mA

Voltage 3.0 2.9 3.0 2.9 V or VIL

4.5 4.4 4.5 4.4

3.0 2.58 2.48 VIOH eb

4mA

4.5 3.94 3.80 IOH eb

8mA

OL Low Level Output 2.0 0.0 0.1 0.1 VIN eVIH IOL e50 mA

Voltage 3.0 0.0 0.1 0.1 V or VIL

4.5 0.0 0.1 0.1

3.0 0.36 0.44 VIOL e4mA

4.5 0.36 0.44 IOL e8mA

OZ TRI-STATE Output 5.5 g0.25 g2.5 mAVIN eVIH or VIL

Off-State Current VOUT eVCC or GND

IIN Input Leakage 0– 5.5 g0.1 g1.0 mAV

IN e5.5V or GND

Current

ICC Quiescent Supply 5.5 4.0 40.0 mAV

IN eVCC or GND

Current

DC Characteristics for ’VHC Family Devices

74VHC

Symbol Parameter VCC TAe25§C Units Conditions

(V)

Typ Limits

VOLP** Quiet Output Maximum Dynamic 5.0 0.9 1.2 V CLe50 pF

VOL

VOLV** Quiet Output Minimum Dynamic 5.0 b0.8 b1.0 V CLe50 pF

VOL

VIHD** Minimum High Level Dynamic 5.0 3.5 V CLe50 pF

Input Voltage

VILD** Maximum High Level Dynamic 5.0 1.5 V CLe50 pF

Input Voltage

**Parameter guaranteed by design.

AC Electrical Characteristics for ’VHC Family Devices:

Symbol Parameter VCC

(V)

74VHC 74VHC

Units Conditions

TAe25§CTAeb

40§C

to a85§C

Min Typ Max Min Max

tPLH, Propagation Delay Time 3.3 g0.3 5.0 7.0 1.0 8.5 ns CLe15 pF

tPHL 7.5 10.5 1.0 12.0 CLe50 pF

5.0 g0.5 3.5 5.0 1.0 6.0 ns CLe15 pF

5.0 7.0 1.0 8.0 CLe50 pF

tPZL, TRI-STATE Output Enable 3.3 g0.3 6.8 10.5 1.0 12.5 ns RLe1kXC

Le15 pF

TimetPZH 9.3 14.0 1.0 16.0 CLe50 pF

5.0 g0.5 4.7 7.2 1.0 8.5 ns CLe15 pF

6.2 9.2 1.0 10.5 CLe50 pF

tPLZ, TRI-STATE 3.3 g0.3 11.2 15.4 1.0 17.5

RLe1kXC

Le50 pF

tPHZ Output

5.0 g0.5 6.0 8.8 1.0 10.0 CLe50 pF

Disable Time

tOSLH, Output to Output Skew 3.3 g0.3 1.5 1.5 ns (Note 1) CLe50 pF

tOSHL 5.0 g0.5 1.0 1.0 CLe50 pF

CIN Input Capacitance 4 10 10 pF VCC eOpen

COUT Output Capacitance 6 pF VCC e5.0V

CPD Power Dissipation Capacitance 18 pF (Note 2)

Note 1: Parameter guaranteed by design. tOSLH e

tPLHmax btPLHmin

OSHL e

tPHLmax btPHLmin

Note 2: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average

operating current can be obtained by the equation: ICC (OPR.) eCPD *VCC *fIN aICC/8 (per bit).

Ordering Information

TL/F/11639–3

Physical Dimensions inches (millimeters)

20-Lead Small Outline Integrated CircuitÐJEDEC SOIC (M)

NS Package Number M20B

20-Lead Plastic EIAJ SOIC (SJ)

NS Package Number M20D

Physical Dimensions inches (millimeters) (Continued)

20-Lead Molded Thin Shrink Small Outline JEDEC Type 1 TSSOP

Order Number 74VHC541MTC

NS Package Number MTC20

74VHC541 Octal Buffer/Line Driver with TRI-STATE Outputs

Physical Dimensions millimeters (Continued)

20-Lead (0.300×Wide) Molded Dual-In-Line Package

Order Number 74VHC541N

NS Package Number N20A

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into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life

failure to perform, when properly used in accordance support device or system, or to affect its safety or

with instructions for use provided in the labeling, can effectiveness.

be reasonably expected to result in a significant injury

to the user.

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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.