NSC DS34C86TN, DS34C86TMX, DS34C86TM Datasheet

DS34C86T
Quad CMOS Differential Line Receiver

General Description

The DS34C86T is a quad differential line receiver designed
to meet the RS-422, RS-423, and Federal Standards 1020
and 1030for balanced and unbalanced digital data transmis­sion, while retaining the low power characteristics of CMOS.

The DS34C86T has an input sensitivity of 200 mV over the
common mode input voltage range of

±

7V.Hysteresis is pro­vided to improve noise margin and discourage output insta­bility for slowly changing input waveforms.

The DS34C86T featuresinternal pull-upand pull-downresis­tors which prevent output oscillation on unused channels.

Separate enable pins allow independent control of receiver
pairs. The TRI-STATE

®

outputs have 6 mA source and sink
capability. The DS34C86T is pin compatible with the
DS3486.

Features

n CMOS design for low power

n

±

0.2V sensitivity over the input common mode voltage

range

n Typical propagation delays: 19 ns
n Typical input hysteresis: 60 mV
n Inputs won’t load line when V

CC

=

0V

n Meets the requirements of EIA standard RS-422
n TRI-STATE outputs for system bus compatibility
n Available in surface mount
n Open input Failsafe feature, output high for open input

Logic Diagram

Connection Diagram Truth Table

Enable Input Output

LXZ
HV

ID

≥ VTH(Max) H

HV

ID

≤ VTH(Min) L

H Open

*

H

*

Open, not terminated

Z=TRI-STATE

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

DS008699-1

Dual-In-Line Package

DS008699-2

Top View

Order Number DS34C86TM, and DS34C86TN

See NS Package Number M16A and N16E

May 1998

DS34C86T Quad CMOS Differential Line Receiver

© 1998 National Semiconductor Corporation DS008699 www.national.com

Absolute Maximum Ratings (Notes 1, 2)

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

Supply Voltage (V

CC

)7V

Input Common Mode Range (V

CM

)

±

14V

Differential Input Voltage (V

DIFF

)

±

14V

Enable Input Voltage (V

IN)

7V

Storage Temperature Range (T

STG

) −65˚C to +150˚C

Lead Temperature (Soldering 4
sec) 260˚C

Maximum Power Dissipation at 25˚C (Note 5)

Plastic “N” Package 1645 mW
SOIC Package 1190 mW

Current Per Output

±

25 mA

This device does not meet 2000V ESD rating. (Note 4)

Operating Conditions

Min Max Unit

Supply Voltage (V

CC

) 4.50 5.50 V

Operating Temperature Range (T

A

) −40 +85 ˚C

Enable Input Rise or Fall Times 500 ns

DC Electrical Characteristics (Note 3)

V

CC

=

5V

±

10%(unless otherwise specified)

Symbol Parameter Conditions Min Typ Max Units

V

TH

Minimum Differential V

OUT

=

V

OH

or V

OL

−200 35 +200 mV

Input Voltage −7V

<

V

CM

<

+7V

R

IN

Input Resistance V

IN

=

−7V, +7V 5.0 6.8 10 kΩ

(Other Input=GND)

I

IN

Input Current V

IN

=

+10V, Other Input

=

GND

+1.1 +1.5 mA

(Under Test) V

IN

=

−10V, Other Input

=

GND

−2.0 −2.5 mA

V

OH

Minimum High Level V

CC

=

Min., V

(DIFF)

=

+1V 3.8 4.2 V

Output Voltage I

OUT

=

−6.0 mA

V

OL

Maximum Low Level V

CC

=

Max., V

(DIFF)

=

−1V 0.2 0.3 V

Output Voltage I

OUT

=

6.0 mA

V

IH

Minimum Enable High 2.0 V
Input Level Voltage

V

IL

Maximum Enable Low 0.8 V
Input Level Voltage

I

OZ

Maximum TRI-STATE V

OUT

=

V

CC

or GND,

Output Leakage Current TRI-STATE Control=V

IL

±

0.5

±

5.0 µA

I

I

Maximum Enable Input V

IN

=

V

CC

or GND

±

1.0 µA

Current

I

CC

Quiescent Power V

CC

=

Max., V

(DIFF)

=

+1V 16 23 mA

Supply Current

V

HYST

Input Hysteresis V

CM

=

0V 60 mV

AC Electrical Characteristics (Note 3)

V

CC

=

5V

±

10%(unless otherwise specified) (

Figures 1, 2, 3

)

Symbol Parameter Conditions Min Typ Max Units

t

PLH

, Propagation Delay C

L

=

50 pF

t

PHL

Input to Output V

DIFF

=

2.5V 19 30 ns

V

CM

=

0V

t

RISE

, Output Rise and C

L

=

50 pF

t

FALL

Fall Times V

DIFF

=

2.5V 4 9 ns

V

CM

=

0V

t

PLZ

, Propagation Delay C

L

=

50 pF

t

PHZ

ENABLE to Output R

L

=

1000Ω 13 18 ns

V

DIFF

=

2.5V

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AC Electrical Characteristics (Note 3) (Continued)

V

CC

=

5V

±

10%(unless otherwise specified) (

Figures 1, 2, 3

)

Symbol Parameter Conditions Min Typ Max Units

t

PZL

, Propagation Delay C

L

=

50 pF

t

PZH

ENABLE to Output R

L

=

1000Ω 13 21 ns

V

DIFF

=

2.5V

Note 1: Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device
should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device operation.

Note 2: Unless otherwise specified, all voltages are referenced to ground.
Note 3: Unless otherwise specified, Min/Max limits apply across the operating temperature range.

All typicals are given for V

CC

=

5V and T

A

=

25˚C.

Note 4: ESD Rating; HBM (1.5kΩ, 100 pF)

Inputs ≥ 2000V
All other pins ≥ 1000V
EIAJ (0Ω, 200 pF) ≥ 350V

Note 5: Ratings apply to ambient temperature at 25˚C. Above this temperature derate N Package 13.16 mW/˚C, and M Package 9.52 mW/˚C.

Comparison Table of Switching Characteristics into “LS-Type” Load (Note 6)

V

CC

=

5V, T

A

=

25˚C (

Figures 4, 5

)

Symbol Parameter DS34C86 DS3486 Units

Typ Max Typ Max

t

PHL(D)

Propagation Delay Time 17 19 ns
Output High to Low

t

PLH(D)

Propagation Delay Time 19 19 ns
Output Low to High

t

PLZ

Output Low to TRI-STATE 13 23 ns

t

PHZ

Output High to TRI-STATE 12 25 ns

t

PZH

Output TRI-STATE to High 13 18 ns

t

PZL

Output TRI-STATE to Low 13 20 ns

Note 6: This Table is provided for comparison purposes only. The values in this table for the DS34C86 reflect the performance of the device but are not tested or
guaranteed.

Test and Switching Waveforms

DS008699-3

FIGURE 1. Propagation Delays

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