NSC DS3650N, DS3650MX, DS3650M Datasheet

DS3650
Quad Differential Line Receivers

General Description

The DS3650 is TTL compatible quad high speed circuits in­tended primarily for line receiver applications. Switching
speeds have been enhanced over conventional line receiv­ers by the use of Schottky technology, and TRI-STATE

®

strobing is incorporated offering a high impedance output
state for bussed organizations.

The DS3650 has active pull-up outputs and offers a
TRI-STATE strobe.

Features

n High speed
n TTL compatible
n Input sensitivity:

±

25 mV

n TRI-STATE outputs for high speed busses
n Standard supply voltages:

±

5V

n Pin and function compatible with MC3450

Connection Diagram

Input Strobe Output

DS3650

V

D

≥ 25 mV L H

H Open

−25 mV ≤ V

ID

≤ 25 mV L X

H Open

V

ID

≤ −25 mV L L

H Open

L=Low Logic State Open=TRI-STATE
H=High Logic State X=Indeterminate State

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

Dual-In-Line Package

DS005782-1

Top View

Order Number DS3650M or DS3650N

See NS Package Number M16A or N16A

For Complete Military 883 Specifications,

see RETS Data Sheet.

Wired “OR” Data Selecting Using TRI-STATE Logic

DS005782-3

June 1999

DS3650 Quad Differential Line Receivers

© 1999 National Semiconductor Corporation DS005782 www.national.com

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

+7.0 V

DC

V

EE

−7.0 V

DC

Differential-Mode Input Signal Voltage

Range, V

IDR

±

6.0 V

DC

Common-Mode Input Voltage Range,

V

ICR

±

5.0 V

DC

Strobe Input Voltage, V

I(S)

5.5 V

DC

Storage Temperature Range −65˚C to +150˚C
Lead Temperature

(Soldering, 4 seconds) 260˚C

Maximum Power Dissipation (Note 1)

at 25˚C
Cavity Package 1509 mW
Molded DIP Package 1476 mW

SO Package 1051 mW

Operating Conditions

Min Max Units

Supply Voltage, V

CC

4.75 5.25 V

DC

Supply Voltage, V

EE

−4.75 −5.25 V

DC

Operating Temperature, T

A

0 +70 ˚C

Output Load Current, I

OL

16 mA

Differential-Mode Input

Voltage Range, V

IDR

−5.0 +5.0 V

DC

Common-Mode Input

Voltage Range, V

ICR

−3.0 +3.0 V

DC

Input Voltage Range

Input to GND, V

IR

−5.0 +3.0 V

DC

Note 1: Derate cavity package 10.1 mW/˚C above 25˚C; derate molded DIP
package 11.8 mW/˚C above 25˚C; derate SO package 8.41 mW/˚C above
25˚C.

Electrical Characteristics (Notes 3, 4)

(V

CC

=

5.0 V

DC,VEE

=

−5.0 V

DC

, Min ≤ TA≤ Max, unless otherwise noted)

Symbol Parameter Conditions Min Typ Max Units

V

IS

Input Sensitivity, (Note 6)

(Common-Mode Voltage Range

=

Min ≤ V

CC

≤ Max

±

25.0 mV

−3V ≤ V

IN

≤ 3V) Min ≥ VEE≥ Max

I

IH(I)

High Level Input Current to (

Figure 5

)75µA

Receiver Input

I

IL(I)

Low Level Input Current to (

Figure 6

) −10 µA

Receiver Input

I

IH(S)

High Level Input Current to Strobe Input (

Figure 3

)V

IH(S)

=

2.4V 40 µA

V

IH(S)

=

V

CC

1mA

I

IL(S)

Low Level Input Current to Strobe Input V

IH(S)

=

0.4V −1.6 mA

V

OH

High Level Output Voltage (

Figure 1

) 2.4 V

V

OL

Low Level Output Voltage (

Figure 1

) 0.45 V

I

OS

Short-Circuit Output Current (Note 5) (

Figure 4

) −18 −70 mA

I

OFF

Output Disable Leakage Current (

Figure 7

)40µA

I

CCH

High Logic Level Supply Current (

Figure 2

)4560mA

from V

CC

I

EEH

High Logic Level Supply Current (

Figure 2

) −17 −30 mA

from V

EE

Note 2: “Absolute Maximum Ratings” are those values beyond which the safety of thedevicecannotbeguaranteed.Exceptfor“OperatingTemperature Range” they
are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device operation.

Note 3: Unless otherwise specified, min/max limits apply across the 0˚C to +70˚C range for the DS3650. All typical values are for T

A

=

25˚C, V

CC

=

5V and V

EE

=

−5V.
Note 4: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown

as max or min on absolute value basis.

Note 5: Only one output at a time should be shorted.
Note 6: A parameter which is of primary concern when designing with line receivers is, what is the minimum differential input voltage required as the receiver input

terminals to guarantee a givenoutputlogicstate.Thisparameteriscommonlyreferredto as threshold voltage. It is well known that design considerations of threshold
voltage are plagued by input offset currents, bias currents, network source resistances, and voltage gain. As a design convenience, the DS3650 is specified to a pa­rameter called input sensitivity (V

IS

). This parameter takes into consideration input offset currents and bias currents and guarantees a minimum input differential volt-

age to cause a given output logic state with respect to a maximum source impedance of 200Ω at each input.

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Switching Characteristics

(V

CC

=

5V

DC,VEE

=

−5 V

DC,TA

=

25˚C unless otherwise noted)

Symbol Parameter Conditions Min Typ Max Units

t

PHL(D)

High-to-Low Logic Level Propagation

21 25 ns

Delay Time (Differential Inputs) (

Figure 8

)

t

PLH(D)

Low-to-High Logic Level Propagation

20 25 ns

Delay Time (Differential Inputs)

t

POH(S)

TRI-STATE to High Logic Level 16 21 ns
Propagation Delay Time (Strobe)

t

PHO(S)

High Logic Level to TRI-STATE 7 18 ns
Propagation Delay Time (Strobe) (

Figure 9

)

t

POL(S)

TRI-STATE to Low Logic Level 19 27 ns
Propagation Delay Time (Strobe)

t

PLO(S)

Low Logic Level to TRI-STATE 14 29 ns
Propagation Delay Time (Strobe)

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