54ABT240J-QMLNOPB - National Semiconductor

54ABT240

Octal Buffer/Line Driver with TRI-STATE®Outputs

General Description

The ’ABT240 is an inverting octal buffer and line driver de-

signed to be employed as a memory address driver, clock

driver and bus oriented transmitter or receiver which pro-

vides improved PC board density.

Features

nOutput sink capability of 48 mA, source capability of

24 mA

nGuaranteed latchup protection

nHigh impedance glitch free bus loading during entire

power up and power down cycle

nNondestructive hot insertion capability

nStandard Microcircuit Drawing (SMD)—5962-9318801

Ordering Code

Military Package

Number Package Description

54ABT240J-QML J20A 20-Lead Ceramic Dual-In-Line

54ABT240W-QML W20A 20-Lead Cerpack

54ABT240E-QML E20A 20-Lead Ceramic Leadless Chip Carrier, Type C

Connection Diagrams

Pin Names Description

,OE

TRI-STATE Output

Enable Inputs

–I

Inputs

–O

Outputs

TRI-STATE®is a registered trademark of National Semiconductor Corporation.

Pin Assignment

for DIP and Flatpak

DS100202-1

Pin Assignment

for LCC

DS100202-2

July 1998

54ABT240 Octal Buffer/Line Driver with TRI-STATE Outputs

Truth Tables

Inputs Outputs

(Pins 12, 14, 16, 18)

LL H

LH L

HX Z

Inputs Outputs

(Pins 3, 5, 7, 9)

LL H

LH L

HX Z

HIGH Voltage Level

L=LOW Voltage Level

X=Immaterial

Z=High Impedance

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Storage Temperature −65˚C to +150˚C

Ambient Temperature under Bias −55˚C to +125˚C

Junction Temperature under Bias

Ceramic −55˚C to +175˚C

Pin Potential to

Ground Pin −0.5V to +7.0V

Input Voltage (Note 2) −0.5V to +7.0V

Input Current (Note 2) −30 mA to +5.0 mA

Voltage Applied to Any Output

in the Disabled or

Power-Off State −0.5V to 5.5V

in the HIGH State −0.5V to V

Current Applied to Output

in LOW State (Max) twice the rated I

(mA)

DC Latchup Source Current

(Across Comm Operating

Range) −150 mA

Over Voltage Latchup (I/O) 10V

Recommended Operating

Conditions

Free Air Ambient Temperature

Military −55˚C to +125˚C

Supply Voltage

Military +4.5V to +5.5V

Minimum Input Edge Rate (∆V/∆t)

Data Input 50 mV/ns

Enable Input 20 mV/ns

Note 1: Absolute maximum ratings are values beyond which the device may

be damaged or have its useful life impaired. Functional operation under these

conditions is not implied.

Note 2: Either voltage limit or current limit is sufficient to protect inputs.

DC Electrical Characteristics

Symbol Parameter ABT240 Units VCC Conditions

Min Typ Max

VIH Input HIGH Voltage 2.0 V Recognized HIGH Signal

VIL Input LOW Voltage 0.8 V Recognized LOW Signal

VCD Input Clamp Diode Voltage −1.2 V Min IIN =−18 mA

VOH Output HIGH Voltage 54ABT 2.5 V Min IOH =−3 mA

54ABT 2.0 V Min IOH =−24 mA

VOL Output LOW Voltage 54ABT 0.55 V Min IOL =48 mA

IIH Input HIGH Current 5 µA Max VIN =2.7V (Note 4)

IN =VCC

IBVI Input HIGH Current Breakdown Test 7 µA Max VIN =7.0V

IIL Input LOW Current −5 µA Max VIN =0.5V (Note 4)

−5 VIN =0.0V

VID Input Leakage Test 4.75 V 0.0 IID =1.9 µA

All Other Pins Grounded

IOZH Output Leakage Current 50 µA 0 − 5.5V VOUT =2.7V; OEn=2.0V

IOZL Output Leakage Current −50 µA 0 − 5.5V VOUT =0.5V; OEn=2.0V

IOS Output Short-Circuit Current −100 −275 mA Max VOUT =0.0V

ICEX Output High Leakage Current 50 µA Max VOUT =VCC

IZZ Bus Drainage Test 100 µA 0.0 VOUT =5.5V; All Others GND

ICCH Power Supply Current 50 µA Max All Outputs HIGH

ICCL Power Supply Current 30 mA Max All Outputs LOW

ICCZ Power Supply Current 50 µA Max OEn=VCC;

All Others at VCC or Ground

ICCT Additional ICC/Input Outputs Enabled 1.5 mA Max VI=VCC − 2.1V

Outputs TRI-STATE 1.5 mA Enable Input VI=VCC − 2.1V

Outputs TRI-STATE 50 µA Data Input VI=VCC − 2.1V

All Others at VCC or Ground

ICCD Dynamic ICC No Load mA/ Max Outputs Open

(Note 4) 0.1 MHz OEn=GND, (Note 3)

One Bit Toggling, 50%Duty Cycle

Note 3: For 8 bits toggling, ICCD <0.8 mA/MHz.

Note 4: Guaranteed, but not tested.

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AC Electrical Characteristics

Symbol Parameter 54ABT Units Fig.

No.

=−55˚C to +125˚C

=4.5V–5.5V

=50 pF

Min Max

PLH

Propagation Delay 0.8 5.5 ns

Figure 5

PHL

Data to Outputs 1.0 5.5

PZH

Output Enable 0.8 7.5 ns

Figure 4

PZL

Time 0.8 7.7

PHZ

Output Disable 1.0 7.5 ns

Figure 4

PLZ

Time 1.0 7.2

Capacitance

Symbol Parameter Typ Units Conditions

=25˚C

Input Capacitance 5.0 pF V

=0V

OUT

(Note 5) Output Capacitance 9.0 pF V

=5.0V

Note 5: COUT is measured at frequency f =1 MHz, per MIL-STD-883B, Method 3012.

AC Loading

DS100202-3

*Includes jig and probe capacitance

FIGURE 1. Standard AC Test Load

DS100202-4

FIGURE 2. Test Input Signal Levels

Amplitude Rep. Rate t

3.0V 1 MHz 500 ns 2.5 ns 2.5 ns

FIGURE 3. Test Input Signal Requirements

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AC Waveforms

DS100202-6

FIGURE 4. TRI-STATE Output HIGH

and LOW Enable and Disable Times

DS100202-7

FIGURE 5. Propagation Delay Waveforms for

Inverting and Non-Inverting Functions

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Physical Dimensions inches (millimeters) unless otherwise noted

20-Terminal Ceramic Chip Carrier (L)

NS Package Number E20A

20-Lead Ceramic Dual-In-Line Package (D)

NS Package Number J20A

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE-

VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI-

CONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or sys-

tems which, (a) are intended for surgical implant into

the body, or (b) support or sustain life, and whose fail-

ure to perform when properly used in accordance

with instructions for use provided in the labeling, can

be reasonably expected to result in a significant injury

to the user.

2. A critical component in any component of a life support

device or system whose failure to perform can be rea-

sonably expected to cause the failure of the life support

device or system, or to affect its safety or effectiveness.

National Semiconductor

Corporation

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Tel: 1-800-272-9959

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Email: support@nsc.com

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Japan Ltd.

Tel: 81-3-5620-6175

Fax: 81-3-5620-6179

20-Lead Ceramic Flatpak (F)

NS Package Number W20A

54ABT240 Octal Buffer/Line Driver with TRI-STATE Outputs

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.