TRANSCEIVER. SN75LBC773 Datasheet

SN75LBC773 Datasheet PDF


Part

SN75LBC773

Description

TRANSCEIVER

Manufacture

etcTI

Page 14 Pages
Datasheet
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SN75LBC773 Datasheet
SN75LBC773
GEOPORTTRANSCEIVER
D Supports a 9-Pin GeoPortHost Interface
Standard for the Intelligent Network Port
D Designed to Operate up to 4-Mbit/s Full
Duplex
D ± 5 V Supply Operation
D Has Driver Short-Circuit Protection
D Includes Failsafe Mechanism for Open
Inputs
D Is Backward Compatible with AppleTalk
and LocalTalk
D Combines Multiple Components into a
Single Chip Solution
D Complements the SN75LBC772 9-Pin
GeoPort Peripheral (DCE) Interface Device
D Uses LinBiCMOSProcess Technology
SLLS247C – FEBRUARY 1997 – NOVEMBER 1997
DW PACKAGE
(TOP VIEW)
DA1
VEE
NC
NC
REN
DZ2
DY2
GND
DEN
DA2
1
2
3
4
5
6
7
8
9
10
20 GND
19 VCC
18 DY1
17 RY3
16 RB3
15 RA2
14 RY2
13 RB1
12 RA1
11 RY1
logic diagram (positive logic)
description
The SN75LBC773 is a low-power LinBiCMOS
device that incorporates the drivers and receivers
for a 9-pin GeoPort host interface. GeoPort
combines hybrid EIA/TIA-422-B and EIA/
TIA-423-B drivers and receivers to transmit data
up to four-Mbit/s full duplex. GeoPort is a serial
communications standard that is intended to
replace the RS-232, AppleTalk, and printer ports
all in one connector in addition to providing
real-time data transfer capability. The
SN75LBC773 provides point-to-point connec-
tions between GeoPort-compatible devices with
data transmission rates up to 4-Mbit/s full duplex
featuring a hot-plug capability. Applications
include connection to telephone, ISDN, digital
sound and imaging, fax-data modems, and other
traditional serial and parallel connections. The
GeoPort is backwardly compatible to both
LocalTalk and AppleTalk.
DA1
1
DA2
DEN
10
9
RY1 11
RY2 14
RY3 17
REN
5
18 DY1
7 DY2
6 DZ2
12 RA1
13 RB1
15
RA2
16 RB3
While the SN75LBC773 is powered off (VCC and VEE = 0 ), the outputs are in a high-impedance state. A logic
high on the driver enable (DEN) or logic low on the receive enable (REN) terminals places the outputs of the
differential driver and receivers, respectively, into a high-impedance state. All drivers and receivers have
fail-safe mechanisms that ensure a high output state when the inputs are left open.
The SN75LBC773 is characterized for operation over the 0°C to 70°C temperature range.
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.
GeoPort, LocalTalk, and AppleTalk are trademarks of Apple Computer, Incorporated.
LinBiCMOS is a trademark of Texas Instruments Incorporated.
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 © 1997, Texas Instruments Incorporated
1

SN75LBC773 Datasheet
SN75LBC773
GEOPORTTRANSCEIVER
SLLS247C – FEBRUARY 1997 – NOVEMBER 1997
FUNCTION TABLES†
SINGLE-ENDED DRIVER
INPUT
(DA1)
OUTPUT
(DY1)
H
L
OPEN
L
H
L
DIFFERENTIAL DRIVER
INPUT ENABLE OUTPUT
(DA2) (DEN) (DY2) (DZ2)
H L HL
L L LH
OPEN
L
HL
X H ZZ
X
OPEN
Z
Z
SINGLED-ENDED RECEIVER
INPUT
ENABLE OUTPUT
(RA2, RA3) (REN) (RY2) (RY3)
H H HL
L H LH
OPEN
H HH
SHORT‡ H ? ?
X L ZZ
X
OPEN
ZZ
DIFFERENTIAL RECEIVER
INPUT
ENABLE
(RA1) (RB1) (REN)
OUTPUT
(RY1)
HL
H
H
LH
H
L
OPEN
SHORT‡
H
H
H
?
XX
L
Z
XX
OPEN
Z
H = high level, L = low level, X = irrelevant, ? = indeterminate, Z = high impedance (off)
‡ –0.2 V < VID < 0.2 V
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)§
Positive supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 to 7 V
Negative supply voltage range, VEE (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 7 to 0.5 V
Receiver input voltage range (RA, RB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 15 V to 15 V
Receiver differential input voltage range, VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 12 V to 12 V
Receiver output voltage range (RY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Driver output voltage range (Power Off) (DY1, DY2, DZ2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 15 V to 15 V
Driver output voltage range (Power On) (DY1, DY2, DZ2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 11 V to 11 V
Driver input voltage range (DA, REN, DEN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC +0.4 V
Electrostatic Discharge (All pins) Human Body Model (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 kV
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
§ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values are with respect to network ground terminal unless otherwise noted.
2. This rating is per MIL-PRF-38535, Method 3015.7.
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Features Datasheet pdf SN75LBC773 GEOPORT™ TRANSCEIVER D Sup ports a 9-Pin GeoPort™ Host Interface Standard for the Intelligent Network P ort D Designed to Operate up to 4-Mbit/ s Full Duplex D ± 5 V Supply Operation D Has Driver Short-Circuit Protection D Includes Failsafe Mechanism for Open Inputs D Is Backward Compatible with Ap pleTalk™ and LocalTalk™ D Combines Multiple Components into a Single Chip Solution D Complements the SN75LBC772 9 -Pin GeoPort Peripheral (DCE) Interface Device D Uses LinBiCMOS™ Process Tec hnology SLLS247C – FEBRUARY 1997 – NOVEMBER 1997 DW PACKAGE (TOP VIEW) DA1 VEE NC NC REN DZ2 DY2 GND DEN DA2 1 2 3 4 5 6 7 8 9 10 20 GND 19 VCC 18 DY1 17 RY3 16 RB3 15 RA2 14 RY2 13 RB1 12 RA1 11 RY1 logic diagram (positive logic) description The SN75LBC773 is a low-power LinBiCMOS device that incorp orates the drivers and receivers for a 9-pin GeoPort host interface. GeoPort c ombines hybrid EIA/TIA-422-B and EIA/ T IA-423-B drivers and receivers to transmit data up to four-Mbit/s full duplex..
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