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SN75161BN Datasheet Preview

SN75161BN Datasheet

OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVERS

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SN75161B, SN75162B
OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVERS
D Meets IEEE Standard 488-1978 (GPIB)
D 8-Channel Bidirectional Transceivers
D Power-Up/Power-Down Protection
(Glitch Free)
D Designed to Implement Control Bus
Interface
D SN75161B Designed for Single Controller
D SN75162B Designed for Multiple
Controllers
D High-Speed, Low-Power Schottky Circuitry
D Low Power Dissipation . . . 72 mW Max Per
Channel
D Fast Propagation Times . . . 22 ns Max
D High-Impedance pnp Inputs
D Receiver Hysteresis . . . 650 mV Typ
D Bus-Terminating Resistors Provided on
Driver Outputs
D No Loading of Bus When Device Is
Powered Down (VCC = 0)
description
The SN75161B and SN75162B eight-channel,
general-purpose interface bus transceivers are
monolithic, high-speed, low-power Schottky
devices designed to meet the requirements of
IEEE Standard 488-1978. Each transceiver is
designed to provide the bus-management and
data-transfer signals between operating units of
a single- or multiple-controller instrumentation
system. When combined with the SN75160B octal
bus transceiver, the SN75161B or SN75162B
provides the complete 16-wire interface for the
IEEE-488 bus.
The SN75161B and SN75162B feature eight
driver-receiver pairs connected in a front-to-back
configuration to form input/output (I/O) ports at
both the bus and terminal sides. A power-
up/-down disable circuit is included on all bus and
receiver outputs. This provides glitch-free opera-
tion during VCC power up and power down.
SLLS005B – OCTOBER 1980 – REVISED MAY 1995
SN75161B . . . DW OR N PACKAGE
(TOP VIEW)
GPIB
I/O Ports
TE 1
REN 2
IFC 3
NDAC 4
NRFD 5
DAV 6
EOI 7
ATN 8
SRQ 9
GND 10
20 VCC
19 REN
18 IFC
17 NDAC
16 NRFD
15 DAV
14 EOI
13 ATN
12 SRQ
11 DC
Terminal
I/O Ports
SN75162B . . . DW PACKAGE
(TOP VIEW)
GPIB
I/O Ports
SC 1
TE 2
REN 3
IFC 4
NDAC 5
NRFD 6
DAV 7
EOI 8
ATN 9
SRQ 10
NC 11
GND 12
24 VCC
23 NC
22 REN
21 IFC
20 NDAC
19 NRFD
18 DAV
17 EOI
16 ATN
15 SRQ
14 NC
13 DC
Terminal
I/O Ports
GPIB
I/O Ports
SN75162B . . . N PACKAGE
(TOP VIEW)
SC 1
TE 2
REN 3
IFC 4
NDAC 5
NRFD 6
DAV 7
EOI 8
ATN 9
SRQ 10
GND 11
22 VCC
21 NC
20 REN
19 IFC
18 NDAC
17 NRFD
16 DAV
15 EOI
14 ATN
13 SRQ
12 DC
Terminal
I/O Ports
NC – No internal connection
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1995, Texas Instruments Incorporated
1




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SN75161BN Datasheet Preview

SN75161BN Datasheet

OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVERS

No Preview Available !

SN75161B, SN75162B
OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVERS
SLLS005B – OCTOBER 1980 – REVISED MAY 1995
description (continued)
The direction of data through these driver-receiver pairs is determined by the DC, TE, and SC (on SN75162B)
enable signals. The SC input on the SN75162B allows the REN and IFC transceivers to be controlled
independently.
The driver outputs (GPIB I/O ports) feature active bus-terminating resistor circuits designed to provide a high
impedance to the bus when supply voltage VCC is 0. The drivers are designed to handle loads up to 48 mA of
sink current. Each receiver features pnp transistor inputs for high input impedance and hysteresis of 400 mV
for increased noise immunity. All receivers have 3-state outputs to present a high impedance to the terminal
when disabled.
The SN75161B and SN75162B are characterized for operation from 0°C to 70°C.
Function Tables
SN75161B RECEIVE/TRANSMIT
CONTROLS
DC
TE
ATN†
BUS-MANAGEMENT CHANNELS
ATN†
SRQ
REN
IFC
EOI
DATA-TRANSFER CHANNELS
DAV
NDAC
NRFD
(Controlled by DC)
(Controlled by TE)
H
H
H
T
R
T
R
R
T
R
R
H
H
L
R
L
L
H
R
T
R
T
T
R
T
T
L
L
L
T
H
L
X
R
T
R
R
R
R
T
T
L
H
X
T
R
T
T
T
T
R
R
H = high level, L = low level, R = receive, T = transmit, X = irrelevant
Direction of data transmission is from the terminal side to the bus side, and the direction of data receiving is from the bus side to the terminal side.
Data transfer is noninverting in both directions.
ATN is a normal transceiver channel that functions additionally as an internal direction control or talk enable for EOI whenever the DC and TE
inputs are in the same state. When DC and TE are in opposite states, the ATN channel functions as an independent transceiver only.
SN75162B RECEIVE/TRANSMIT
CONTROLS
BUS-MANAGEMENT CHANNELS
DATA-TRANSFER CHANNELS
SC
DC
TE
ATN†
ATN†
SRQ
REN
IFC
EOI
DAV
NDAC NRFD
(Controlled by DC) (Controlled by SC)
(Controlled by TE)
H
H
H
R
T
H
H
L
T
T
R
R
R
L
L
H
T
R
L
L
L
R
R
T
T
T
H
L
X
R
T
R
R
T
T
L
H
X
T
R
T
T
R
R
H
T
T
L
R
R
H = high level, L = low level, R = receive, T = transmit, X = irrelevant
Direction of data transmission is from the terminal side to the bus side, and the direction of data receiving is from the bus side to the terminal side.
Data transfer is noninverting in both directions.
ATN is a normal transceiver channel that functions additionally as an internal direction control or talk enable for EOI whenever the DC and TE
inputs are in the same state. When DC and TE are in opposite states, the ATN channel functions as an independent transceiver only.
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN75161BN
Description OCTAL GENERAL-PURPOSE INTERFACE BUS TRANSCEIVERS
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