SN55LBC976 Datasheet, PDF (1/25 Pages) Texas Instruments – 9-CHANNEL DIFFERENTIAL TRANSCEIVER

SN55LBC976
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SGLS091A – JUNE 1995 – REVISED JANUARY 1997
D Nine Differential Channels for the Data and
Control Paths of the Differential Small
Computer Systems Interface (SCSI) and
Intelligent Peripheral Interface (IPI-2)
D Meets or Exceeds the Requirements of
ANSI Standard RS-485 and
ISO 8482:1987(E)
D Packaged in 380-mil Fine Pitch Ceramic
Flat (WD) Package Using 25-mil
Center-to-Center Spacing
D Designed to Operate at 10 Million Transfers
Per Second
D Low Disabled Supply Current
1.4 mA Typical
D Thermal Shutdown Protection
D Power-Up/Power-Down Glitch Protection
D Positive and Negative Output Current
Limiting
D Open-Circuit Fail-Safe Receiver Design
description
The SN55LBC976 is a 9-channel differential
transceiver based on the SN55LBC176
LinASIC™ cell. Use of TI’s LinBiCMOS™^† process
technology allows the power reduction necessary
to integrate nine differential transceivers. On-chip
enabling logic makes this device applicable for the
data path (eight data bits plus parity) and the
control path (nine bits) for both the Small
Computer Systems Interface (SCSI) and the
Intelligent Peripheral Interface (IPI-2) standard
data interfaces.
WD PACKAGE
(TOP VIEW)
GND ₁
BSR ₂
CRE 3
1A 4
1DE/RE 5
2A 6
2DE/RE 7
3A 8
3DE/RE 9
4A 10
4DE/RE 11
V_CC 12
GND 13
GND 14
GND 15
GND ¹⁶
GND ¹⁷
V_CC ¹⁸
5A ¹⁹
5DE/RE ²⁰
6A ²¹
6DE/RE ²²
7A ²³
7DE/RE ²⁴
8A ²⁵
8DE/RE ²⁶
9A ²⁷
9DE/RE ²⁸
56 ^CDE2
55 ^CDE1
54 ^CDE0
53 9B +
52 9B –
51 8B +
50 8B –
49 7B +
48 7B –
47 6B +
46 6B –
45 V_CC
44 GND
43 GND
42 GND
41 GND
40 _GND
39 _VCC
38 _{5B +}
37 _{5B –}
36 _{4B +}
35 _{4B –}
34 _{3B +}
33 _{3B –}
32 _{2B +}
31 _{2B –}
30 _{1B +}
29 _{1B –}
The switching speed and testing capabilities of the SN55LBC976 are sufficient to transfer data over the data
bus at 10 million transfers per second. Each of the nine channels conforms to the requirements of the ANSI
RS-485 and ISO 8482:1987(E) standards referenced by ANSI X3.129-1986 (IPI), ANSI X3.131-1993 (SCSI-2),
and the proposed SCSI-3 standards.
The SN55LBC976 is characterized for operation from – 55°C to 125°C.
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.
† _{Patent pending}
LinASIC and LinBiCMOS are trademarks 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.
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Copyright © 1997, Texas Instruments Incorporated
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