Datasheet DS75161AN, DS75160AN Datasheet (NSC)

DS75160A/DS75161A
IEEE-488 GPIB Transceivers

DS75160A/DS75161A IEEE-488 GPIB Transceivers

May 1999

General Description

This family of high-speed-Schottky 8-channel bi-directional
transceivers is designed to interface TTL/MOS logic to the
IEEE Standard 488-1978 General Purpose Interface Bus
(GPIB). PNP inputs are usedatalldriver inputs for minimum
loading, and hysteresis is provided at all receiver inputs for
added noise margin. The IEEE-488 required bus termination
is provided internally with an active turn-off feature which dis­connects the termination from the bus when V

The General Purpose Interface Bus is comprised of 16 sig­nal lines — 8 for data and 8 for interface management. The
data lines are always implemented with DS75160A, and the
management lines are either implemented with DS75161A in
a single-controller system.

is removed.

CC

Connection Diagrams

Dual-In-Line Package

Features

n 8-channel bi-directional non-inverting transceivers
n Bi-directional control implemented with TRI-STATE

output design

n Meets IEEE Standard 488-1978
n High-speed Schottky design
n Low power consumption
n High impedance PNP inputs (drivers)
n 500 mV (typ) input hysteresis (receivers)
n On-chip bus terminators
n No bus loading when V
n Pin selectable open collector mode on DS75160A driver

outputs

n Accommodates multi-controller systems

Dual-In-Line Package

Order Number DS75161AN or DS75161AWM

See NS Package Number M20B or N20B

is removed

CC

®

DS005804-16

DS005804-1

Order Number DS75160AN or DS75160AWM

See NS Package Number M20B or N20A

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

© 1999 National Semiconductor Corporation DS005804 www.national.com

Top View

Absolute Maximum Ratings (Note 2)

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

Supply Voltage, V

CC

Input Voltage 5.5V
Storage Temperature Range −65˚C to +150˚C
Lead Temperature (Soldering, 4 sec.) 260˚C

7.0V

Molded Package 1897 mW

Min Max Units

, Supply Voltage 4.75 5.25 V

V

CC

, Ambient Temperature 0 70 ˚C

T

A

, Output Low Current

I

OL

Bus 48 mA
Terminal 16 mA

Note 1: Derate molded package 15.2 mW/˚C above 25˚C.

Maximum Power Dissipation (Note 1) at 25˚C

Electrical Characteristics (Notes 3, 4)

Symbol Parameter Conditions Min Typ Max Units

V

IH

V

IL

V

IK

V

HYS

V

OH

V

OL

I

IH

I

IL

V

BIAS

I

LOAD

I

OS

I

CC

C

IN

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 device
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 temperature range and the 4.75V to 5.25V power supply range. All typical values
are for T

Note 4: All currents into device pins are shown as positive; all currents out of device pins are shown as negative; all voltages are referenced to ground, unless oth­erwise specified. All values shown as max or min are so classified on absolute value basis.

Note 5: Only one output at a time should be shorted.
Note 6: This characteristic does not apply to outputs on DS75161A that are open collector.

High-Level Input Voltage 2 V
Low-Level Input Voltage 0.8 V
Input Clamp Voltage I

=

−18 mA −0.8 −1.5 V

I

Input Hysteresis Bus 400 500 mV
High-Level Terminal I
Output Voltage Bus (Note 4) I
Low-Level Terminal I
Output Voltage Bus I
High-Level Terminal and V
Input Current TE, PE, DC, V
Low-Level SC Inputs V

=

−800 µA 2.7 3.5 V

OH

=

−5.2 mA 2.5 3.4

OH

=

16 mA 0.3 0.5 V

OL

=

48 mA 0.4 0.5

OH

=

5.5V 0.2 100 µA

I

=

2.7V 0.1 20

I

=

0.5V −10 −100 µA

I

Input Current
Terminator Bias Driver I

=

0 (No Load) 2.5 3.0 3.7 V

I(bus)

Voltage at Bus Port Disabled
Terminator V
Bus Loading V
Current Bus Driver V

=

−1.5V to 0.4V −1.3

I(bus)

=

0.4V to 2.5V 0 −3.2

I(bus)

=

2.5V to 3.7V 2.5 mA

I(bus)

Disabled −3.2

=

V

3.7V to 5V 0 2.5

I(bus)

=

V

5V to 5.5V 0.7 2.5

I(bus)

0V, V

=

0V to 2.5V 40 µA

I(bus)

=

0V (Note 5) −15 −35 −75 mA

O

Short-Circuit Terminal V

=

V

CC

=

2V, V

I

Output Current Bus (Note 6) −35 −75 −150
Supply Current DS75160A Transmit, TE=2V, PE=2V, V

Receive, TE=0.8V, PE=2V, V

DS75161A TE=0.8V, DC=0.8V, V

Bus-Port Bus V

=

CC

5V or 0V, V

=

0V to 2V, 20 30 pF

I

=

0.8V 85 125

I

=

0.8V 70 100 mA

I

=

0.8V 84 125

I

Capacitance f=1 MHz

=

A

25˚C and V

=

5.0V.

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Switching Characteristics (Note 7)

=

V

5.0V

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Symbol Parameter From To Conditions DS75160A DS75161A DS75162A Units

Propagation Delay Time, V

t

PLH

Low to High Level Output Terminal Bus R

t

Propagation Delay Time, C

PHL

High to Low Level Output

t

Propagation Delay Time, V

PLH

Low to High Level Output Bus Terminal R

t

Propagation Delay Time, C

PHL

High to Low Level Output

t

Output Enable Time V

PZH

to High Level V

t

Output Disable Time TE, DC, R

PHZ

From High Level or SC C

t

Output Enable Time (Note 8) Bus V

PZL

to Low Level (Note 9) V

t

Output Disable Time R

PLZ

From Low Level C

t

Output Enable Time V

PZH

to High Level V

t

Output Disable Time TE, DC, R

PHZ

From High Level or SC Terminal C

t

Output Enable Time (Note 8) V

PZL

to Low Level (Note 9) V

t

Output Disable Time R

PLZ

From Low Level C

t

Output Pull-Up Enable V

PZH

Time (DS75160A Only) PE Bus V

t

Output Pull-Up Disable (Note 8) R

PHZ

Time (DS75160A Only) C

Note 7: Typical values are for V
Note 8: Refer to Functional Truth Tables for control input definition.
Note 9: Test configuration should be connected to only one transceiver at a time due to the high current stress caused by the V

nected to that input becomes active.

±

5%,T

=

0˚C to 70˚C

A

CC

=

5.0V and T

=

L

=

L

=

L

Figure 1

=

L

=

L

=

L

Figure 2

=

I

=

L

=

L

=

L

Figure 1

=

I

=

L

=

L

=

L

Figure 1

=

I

=

L

=

L

=

L

Figure 1

=

I

=

L

=

L

=

L

Figure 1

=

I

=

L

=

L

=

L

Figure 1

=

25˚C and are meant for reference only.

A

Min Typ Max Min Typ Max Min Typ Max

2.3V 10 20 10 20 10 20 ns

38.3Ω
30 pF 14 20 14 20 14 20 ns

5.0V 14 20 14 20 14 20 ns
240Ω
30 pF 10 20 10 20 10 20 ns

3.0V 19 32 23 40 23 40 ns
0V

480Ω 15 22 15 25 15 25 ns
15 pF

0V 24 35 28 48 28 48 ns

2.3V

38.3Ω 17 25 17 27 17 27 ns

15 pF

3.0V 17 33 18 40 18 40 ns
0V
3kΩ 15 25 22 33 22 33 ns
15 pF

0V 25 39 28 52 28 52 ns

5V

280Ω 15 27 20 35 20 35 ns
15 pF

3V 10 17 NA NA ns

0V

480Ω 10 15 NA NA ns

15 pF

voltage source when the output con-

I

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Switching Load Configurations

VClogic high=3.0V

logic low=0V

V

C

includes jig and probe capacitance

*C

L

FIGURE 1.

Connection Diagrams

DS005804-8

VClogic high=3.0V

logic low=0V

V

C

includes jig and probe capacitance

*C

L

Dual-In-Line Package

DS005804-9

FIGURE 2.

Top View

Functional Description

DS75160A

This device is an 8-channel bi-directional transceiver with
one common direction control input, denoted TE. When used
to implement the IEEE-488 bus, this device is connected to
the eight data bus lines, designated DIO
connections to the bus lines have internal terminators, in ac­cordance with the IEEE-488 Standard, that are deactivated
when the device is powered down. This feature guarantees
no bus loading when V
have a control mode that either enables or disables the ac-

=

0V. The bus port outputs also

CC

tive upper stage of the totem-pole configuration. When this
control input, denoted PE, is in the high state, the bus out­puts operate in the high-speed totem-pole mode. When PE
is in the low state, the bus outputs operate as open collector
outputs which are necessary for parallel polling.

DS75161A

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–DIO8. The port

1

DS005804-2

This device is also an 8-channel bi-directional transceiver
which is specifically configured to implement the eight man­agement signal lines of the IEEE-488 bus. This device,
paired with the DS75160A, forms the complete 16-line inter­face between the IEEE-488 bus and a single controller in­strumentation system. In compliance with the system organi­zation of the management signal lines, the SRQ, NDAC, and
NRFD bus port outputs are open collector. In contrast to the
DS75160A, these open collector outputs are a fixed configu­ration. The direction control is divided into three groups. The
DAV, NDAC, and NRFD transceiver directions are controlled
by the TE input. The ATN, SRQ, REN, and IFC transceiver
directions are controlled by the DC input. The EOI trans­ceiver direction is a function of both the TE and DC inputs, as
well as the logic level present on the ATN channel. The port
connections to the bus lines have internal terminators identi­cal to the DS75160A.

Functional Description (Continued)
Table of Signal Line Abbreviations

Signal Line Mne-

Classi- monic Definition Device

fication

DC Direction Control DS75161A

Control PE Pull-Up Enable DS75160A
Signals TE Talk Enable All

SC System Controller
Data B1–B8 Bus Side of Device
I/O Ports D1–D8 Terminal Side DS75160A

of Device
ATN Attention
DAV Data Valid

EOI End or Identify
Management IFC Interface Clear DS75161A
Signals NDAC Not Data Accepted

NRFD Not Ready for Data

REN Remote Enable
SRQ Service Request

Logic Diagrams

DS75160A

DS005804-4

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Logic Diagrams (Continued)

DS75161A

Switching Waveforms

Transmit Propagation Delays

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DS005804-5

DS005804-7

DS005804-10

Switching Waveforms (Continued)

Terminal Enable/Disable Times

Receive Propagation Delays

DS005804-11

DS005804-12

Bus Enable/Disable Times

*Input signal: f=1.0 MHz, 50%duty cycle, t

=

≤ 5ns

t

r

f

Performance Characteristics

Refer to Electrical Characteristics table

DS005804-13

Bus Port Load Characteristics

DS005804-14

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Functional Truth Tables
DS75160A

Control Input Data Transceivers

TE PE Direction Bus Port Configuration

H H T Totem-Pole Output
H L T Open Collector Output
L X R Input

DS75161A

Control Input Level Transceiver Signal Direction

TE DC ATN

HH R RRTRRT
HL T TTRRRT
LHRRRTTTR
LL T TTRTTR
HXH T
LXH R
XHL R
XLL T

=

H

High level input
L=Low level input
X=Don’t care
T=Transmit, i.e., signal outputted to bus
R=Receive, i.e., signal outputted to terminal

*

The ATN signal level is sensed for internal multiplex control of EOI transmission direction logic.

Level

*

EOI REN IFC SRQ NRFD NDAC DAV

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Physical Dimensions inches (millimeters) unless otherwise noted

Order Number DS75160AWM

NS Package Number M20B

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

Molded Dual-In-Line Package (N)

Order Number DS75160AN or DS75161AN

NS Package Number N20A

DS75160A/DS75161A IEEE-488 GPIB Transceivers

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can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.

labeling, can be reasonably expected to result in a
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