NSC DS3651N Datasheet

DS1651/DS3651 Quad High Speed MOS Sense Amplifiers

June 1999

General Description

The DS1651/DS3651 is TTL compatible high speed circuits intended for sensing in a broad range of MOS memory system applications. Switching speeds have been enhanced over conventional sense amplifiers by application of Schottky technology, and TRI-STATE fering a high impedance output state for bused organization.

The DS1651/DS3651 has active pull-up outputs and offers open collector outputs providing implied “AND” operations.

®

strobing is incorporated, of-

Features

n High speed n TTL compatible n Input sensitivity — n TRI-STATE outputs for high speed buses n Standard supply voltages — n Pin and function compatible with MC3430

Connection Diagram Truth Table

Dual-in-Line Package

DS007528-1

Top View

Order Number DS1651J, DS3651J or DS3651N

See NS Package Number J16A or N16A

L=Low logic state H=High logic state Open=TRI-STATE X=Indeterminate state

Input Strobe

V

≥ 7mW

ID

= 0˚C to +70˚C

T

A

−7 mV ≤ V = 0˚C to +70˚C

T

A

V

ID

= 0˚C to +70˚C

T

A

≤ −7 mV

≤ +7 mV

ID

±

7mV

±

5V

Output

DS3651

L H

H

Open

X

Open

L

Open

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

Typical Applications

A Typical MOS Memory Sensing Application for a 4k work by 4-bit

Memory Arrangement Employing 1103 Type Memory Devices

Note: Only 4 devices are required for a 4k word by 16-bit memory system.

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DS007528-2

Absolute Maximum Ratings (Note 2)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.

Power Supply Voltages

V

CC

V

EE

Differential-Mode Input Signal Voltage

Range, V

Common-Mode Input Voltage Range,

Strobe Input Voltage, V

IDR

V

ICR

I(S)

Strobe Temperature Range −65˚C to +150˚C

Maximum Power Dissipation (Note 1) at 25˚C

Cavity Package Molded Package

Lead Temp. (Soldering, 10 seconds) 300˚C

+7 V

−7 V

±

6V

±

5V

5.5 V

1509 mW 1476 mW

Operating Conditions

Supply Voltage (V

DS1651 DS3651

Supply Voltage (V

DC DC

DC

DC DC

DS1651 DS3651

Operating Temperature (T

DS1651

DS3651 Output Load Current, (I Differential Mode Input

Voltage Range, (V Common-Mode Input

Voltage Range, (V Input Voltage Range

(Any Input to GND), (V

)

Min Max Unit

CC

)

EE

OL

) −5.0 +5.0 V

IDR

) −3.0 +3.0 V

ICR

)

A

4.5

4.75

−4.5

−4.75

−550+125

5.5

5.25

−5.5

−5.25

+70

V V

˚C ˚C

)16mA

) −5.0 +3.0 V

IR

Electrical Characteristics

=

V

5V

CC

Symbol Parameter Conditions Min Typ Max Unit

V

IS

V

IO

I

IB

I

IO

V

IL(S)

V

IH(S)

I

IL(S)

I

IL(S)

V

OH

V

OL

I

OS

I

OFF

I

CC

I

EE

=

, Min ≤ TA≤ Max, unless otherwise noted (Notes 3, 4)

DC,VEE

Input Sensitivity (Note 6) (Common-Mode Voltage Range) V

ICR

−5 V

DC

= −3V ≤ VIN≤ +3V

Min ≤ V Min ≥ V

CC EE

≤ Max

≥ Max

±

7.0 mV

Input Offset Voltage 2mV Input Bias Current VCC= Max, VEE= Max 20 µA Input Offset Current 0.5 µA Strobe Input Voltage

(Low State) Strobe Input Voltage

(High State)

2V

0.8 V

Strobe Current (Low State) VCC= Max, VEE= Max, VIN= 0.4V −1.6 mA Strobe Current (High State) VCC= Max,

= Max

V

EE

Output Voltage (High States) VCC= Min,

= Min

V

EE

Output Voltage (Low State) VCC= Min,

= Min

V

EE

V

= 2.4V DS3651 40 µA

IN

V

IN=VCC

V

= 2.4V DS1651 100 µA

IN

V

IN=VCC

I

= −400 µA DS1651/DS3651

O

=

I

16 mA DS3651 0.45

O

2.4 V

DS1651 0.50

1mA

V

Output Current Short Circuit VCC= Max, VEE= Max, (Note 5) DS1651/DS3651 −18 −70 mA Output Disable Leakage

Current High Logic Level Supply

Current

VCC= Max, VEE= Max DS3651 40 µA

DS1651 100 µA

VCC= Max, VEE= Max

45 60 mA

−17 −30 mA

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