NSC DS96F174CN, DS96F174CJ Datasheet

DS96F172C/DS96F172M/DS96F174C/DS96F174M
EIA-485/EIA-422 Quad Differential Drivers

DS96F172C/DS96F172M/DS96F174C/DS96F174M EIA-485/EIA-422 Quad Differential Drivers

June 1998

General Description

The DS96F172 and the DS96F174 are high speed quad dif­ferential line drivers designed to meet EIA-485 Standards.
The DS96F172 and the DS96F174 offer improved perfor­mance due tothe use of L-FASTbipolar technology. The use
of LFAST technology allows the DS96F172 and DS96F174
to operate at higher speeds while minimizing power con­sumption.

The DS96F172 and the DS96F174 have TRI-STATE
puts and are optimized for balanced multipoint data bus
transmission at rates up to 15 Mbps. The drivers have wide
positive and negative common mode range for multipoint ap­plications in noisy environments. Positive and negative
current-limiting is provided which protects the drivers from
line fault conditions over a +12V to −7.0V common mode
range. A thermal shutdown feature is also provided. The
DS96F172 features an active high and active low Enable,
common to all four drivers. The DS96F174 features separate
active high Enables for each driver pair.

®

Features

n Meets EIA-485 and EIA-422 standards
n Monotonic differential output switching
n TRI-STATE outputs
n Designed for multipoint bus transmission
n Common mode output voltage range: −7.0V to +12V
n Operates from single +5.0V supply
n Reduced power consumption

out-

n Thermal shutdown protection
n DS96F172 and DS96F174 are lead and function

compatible with the SN75172/174 or the
AM26LS31/MC3487

n Military temperature range available
n Qualified for MIL-STD-883C
n Standard military drawings available (SMD)
n Available in DIP (J), LCC (E), and Flatpak (W) packages

Logic Diagrams Function Tables (Each Driver)

DS96F172

DS009625-14

DS96F172

Input Enable Outputs

AEE

HHXHL
LHXLH
HXLHL
LXLLH
XLHZZ

YZ

DS96F174

DS009625-15

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

© 1998 National Semiconductor Corporation DS009625 www.national.com

DS96F174

Input Enable Outputs

AEYZ

HHHL
LHLH
XLZZ

H = High Level
L = Low Level
X = Don’t Care
Z = High Impedance (Off)

COMMERCIAL
Absolute Maximum Ratings

(Note 2)

Specifications for the 883 version of this product are
listed separately on the following pages.

Storage Temperature Range (T

) −65˚C to +175˚C

STG

Lead Temperature (Soldering, 60 sec.) 300˚C
Maximum Package Power Dissipation (Note 1) at 25˚C

Ceramic DIP (J) 1500 mW
Supply Voltage 7.0V
Enable Input Voltage 5.5V

Recommended Operating
Conditions

Min Typ Max Units

Supply Voltage (V

DS96F172C/DS96F174C 4.75 5.0 5.25 V

Common Mode −7.0 +12.0 V

Output Voltage (V
Output Current HIGH (I
Output Current LOW (I
Operating Temperature

)

(T

A

DS96F172C/DS96F174C 0 +70 ˚C

Note 1: Derate “J” package 10 mW/˚C above 25˚C.

)

CC

)

OC

) −60 mA

OH

)60mA

OL

Electrical Characteristics (Notes 3, 4)

Over recommended supply voltage and operating temperature range, unless otherwise specified

Symbol Parameter Conditions Min Typ Max Units

(Note 2)
V
V

V
V
V
|V
|V

V
∆|V

V

∆|V

I
I

I
I
I

I
I

Input Voltage HIGH 2.0 V

IH

Input Voltage LOW TA= 0˚C to +70˚C 0.8 V

IL

Output Voltage HIGH IOH= −33 mA TA= 0˚C to +70˚C 3.0 V

OH

Output Voltage LOW IOL=33mA TA= 0˚C to +70˚C 2.0 V

OL

Input Clamp Voltage II= −18 mA −1.5 V

IC

| Differential Output Voltage IO= 0 mA 6.0 V

OD1

| Differential Output Voltage RL=54Ω,

OD2

Figure 1

T

= −55˚C to +125˚C 0.7

A

TA= −55˚C 1.2 2.0 V

1.5

R

= 100Ω,

Differential Output Voltage

OD

| Change in Magnitude of Differential RL=54Ωor 100Ω, −40˚C to +125˚C

OD

Output Voltage (Note 5)
Common Mode Output Voltage

OC

(Note 6)

| Change in Magnitude of Common RL=54Ωor 100Ω,

OC

L

Figure 2

Figure 1

RL=54Ωor 100Ω,

Figure 1

TA= 0˚C to +70˚C 1.0 V

−55˚C to +125˚C

Figure 1

Figure 1

2.0 2.3

Mode Output Voltage (Note 5)
Output Current with Power Off VCC= 0V, VO= −7.0V to +12V

O

High Impedance State Output

OZ

Current
Input Current HIGH VI= 2.4V 20 µA

IH

Input Current LOW VI= 0.4V −50 µA

IL

Short Circuit Output Current VO= −7.0V −250

OS

(Note 7) V

Supply Current (All Drivers) No Load Outputs Enabled 50 mA

CC
CCX

VO= −7.0V to +12V

= 0V −150 mA

O

V

O=VCC

V

= +12V 250

O

Outputs Disabled 30

±

20

±

0.2 V

±

0.4 V

3.0 V

±

0.2 V

±

50 µA

±

50 µA

150

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COMMERCIAL
Switching Characteristics

VCC= 5.0V, TA= 25˚C

Symbol Parameter Conditions Min Typ Max Units

t

DD

t

TD

t

PLH

Differential Output Delay Time RL=60Ω,
Differential Output Transition Time 15 22 ns
Propagation Delay Time, RL=27Ω,
Low-to-High Level Output

t

PHL

Propagation Delay Time, 12 16 ns
High-to-Low Level Output

t

ZH

t

ZL

t

HZ

t

LZ

t

LZL

Output Enable Time to High Level RL= 110Ω,
Output Enable Time to Low Level RL= 110Ω,
Output Disable Time from High Level RL= 110Ω,
Output Disable Time from Low Level RL= 110Ω,
Output Disable Time from Low Level

Figure 6

with Load Resistor to GND (Note 8)

t

SKEW

Note 2: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices
should be operated at these limits. The tables of “Electrical Characteristics” provide conditions for actual device operation.

Note 3: Unless otherwise specified min/max limits apply across the 0˚C to +70˚C range for the DS96F172C/DS96F174C. All typicals are given for V
= 25˚C.

Note 4: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are reference to ground unless otherwise specified.
Note 5: ∆|V
Note 6: In EIA-422A and EIA-485 standards, VOC, which is the average of the two output voltages with respect to ground, is called output offset voltage, V
Note 7: Only one output at a time should be shorted.
Note 8: For more information see Application Bulletin, contact Product Marketing.

Driver Output to Output RL=60Ω 1.0 4.0 ns

| and ∆|VOC| are the changes in magnitude of VODand VOCrespectively, that occur when the input is changed from a high level to a low level.

OD

Order Number: DS96F172CN

DS96F174CJ
DS96F174CN
NS Package Number J16A or N16E

Figure 3

Figure 4

FIgure 4
Figure 6
Figure 5
Figure 6

15 20 ns

12 16 ns

25 32 ns
25 32 ns
25 30 ns
20 25 ns

300 ns

= 5V and T

CC

A

.

OS

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MIL-STD-883C
Absolute Maximum Ratings

(Note 2)

For complete Military Specifications, refer to the appro­priate SMD or MDS.

Storage Temperature Range (T

) −65˚C to +175˚C

STG

Lead Temperature (Soldering, 60 sec.) 300˚C

Maximum Package Power Dissipation (Note 9) at 25˚C

Ceramic LCC (E) 2000 mW
Ceramic DIP (J) 1800 mW

Ceramic Flatpak (W) 1000 mW
Supply Voltage 7.0V
Enable Input Voltage 5.5V

Recommended Operating
Conditions

Supply Voltage (V

)

CC

DS96F172M/DS96F174M 4.50 5.0 5.50 V

Common Mode −7.0 +12.0 V

Output Voltage (V
Output Current HIGH (I
Output Current LOW (I

)

OC

OH

OL

Operating Temperature (T

DS96F172M/DS96F174M −55 +125

Note 9: Above TA= 25˚C, derate “E” package 13.4, “J” package 12.5, “W”
package 7.1 mW/˚C

Min Typ Max Units

) −60 mA

)60mA

)

A

Electrical Characteristics (Notes 3, 4)

Over recommended supply voltage and operating temperature range unless otherwise specified

Symbol Parameter Conditions Min Max Units

V
V

V
|V
|V

∆|V

V

∆|V

I

O

I

OZ

I

IH

I

IL

I

OS

I

CC

I

CCX

Input Voltage HIGH 2.0 V

IH

Input Voltage LOW TA= 25˚C 0.8 V

IL

Input Clamp Voltage II= −18 mA −1.5 V

IC

| Differential Output Voltage IO= 0 mA 6.0 V

OD1

| Differential Output Voltage RL=54Ω,VCC= 4.5V TA= −55˚C 1.2

OD2

Figure 1

R

= 100Ω,VCC= 4.5V,

| Change in Magnitude of Differential RL=54Ωor 100Ω,TA= 25˚C, or +125˚C

OD

Output Voltage (Note 5) V
Common Mode Output Voltage

OC

(Note 6)

| Change in Magnitude of Common RL=54Ωor 100Ω,VCC= 4.5V,

OC

L

= 4.5V,

CC

Figure 1

RL=54Ωor 100Ω,

T

= −55˚C, or +125˚C 0.7

A

TA= 25˚C, or +125˚C 1.5 V

Figure 1

2.0

−55˚C

Figure 1

Figure 1

±
±

3.0 V

±

Mode Output Voltage (Note 5)
Output Current with Power Off VCC= 0V, VO= −7.0V to +12V
High Impedance State Output Current VO= −7.0V to +12V

±
±

Input Current HIGH VI= 2.4V 20 µA
Input Current LOW VI= 0.4V −50 µA
Short Circuit Output Current VO= −7.0V −250
(Note 7) V

= 0V −150 mA

O

V

O=VCC

V

= +12V 250

O

150

Supply Current (All Drivers) No Load Outputs Enabled 50 mA

Outputs Disabled 30

0.2 V

0.4 V

0.2 V

50 µA
50 µA

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