Philips PM2519 - SN75160 A, SN75161 A IEEE-488 GPIB BUS TRANSCEIVERS

10-6
$N75160A, SN75161A
1EEE-488 GPIB BUS TRANSCEIVERS
SN75160A
iN DUAL-IN-LINE PACKAGE
(TOP VIEW)
TERMINAL
Veo “01 D2 D3 04 DS 06 0O7 DB PE
(st fel fel fe) fn
eS a EA
TE Bl B2 B4 B6 B7 88, GND
sy
BUS
Table of abbreviations Ste
CLASS NAME | IDENTITY
CONTROL
INPUTS
Direction Control
Pull-up Enable
Talk Enable
SN75160A
1/0 PORTS
Bus side of device
Terminal side of device
SN75161A/162A
SIGNAL
MNEMONICS
Attention
Data Valid
End of Identify
Interface Clear
Not Data Accepted
Not Ready for Data.
Remote Enable
Service Request
System Controller
SN75160A function tables
INPUTS OUTPUT | inputs | OUTPUT
irrelevant, Z =
= free state; H = high, level, L = low level, X =
highimpsdance state. “This is the high-impedance state of a nor-
mal 3-state output modified by the internal resistors to Vcc and
ground,
Description
These octal bus transceivers are designed to provide
communication on the general-purpose interface bus
(GPIB) between operating units of the instrumentation
system.
The sixteen signal lines normally required by the interface
system can be implemented with two devices. The
SN75160A handles the eight-line data bus. The data-
transfer and bus-management signals are handled by the
SN75161A in systems with one controller, or by the
SN75162A in systems with more than one. An active
turn-off feature has been incorporated into the bus-
terminating resistors so that the devices exhibit a high
impedance to the bus when Vcc = 0 V.
When PE is low, the bus outputs of the SN75160A have
the characteristics of open-collector outputs. They act as
three-state ports when PE is high. Taking TE low places
those ports in the free-state, wherein they can be driven
by the bus lines, and enables the D outputs.
SN75161A
N DUAL-IN-LINE PACKAGE
(TOP VIEW)
TERMINAL
Vec “REN iFC NDAC NRFD DAV EQi ATN SRQ OC
Ly GI
TE (REN IFC NDAC NRFO DAV EOI ATN
5] fe] GT cel [eI to]
SRG, GND
BUS
S14552
5N75161A function table
DIRECTION OF DATA**
CONTROLS*
ATN
Levet Direction | FO! REN 'FC SRA NRFO NDAC DAV