SN75LBC976 Datasheet, PDF (1/24 Pages) Texas Instruments – 9-CHANNEL DIFFERENTIAL TRANSCEIVER

ą
SN75LBC976
9ĆCHANNEL DIFFERENTIAL TRANSCEIVER
ą
SLLS133D − AUGUST 1992 − REVISED MAY 1995
• Nine Differential Channels for the Data and
Control Paths of the Differential Small
Computer Systems Interface (SCSI) and
Intelligent Peripheral Interface (IPI-2)
• Meets or Exceeds the Requirements of
ANSI Standard RS-485 and
ISO 8482:1987(E)
• Packaged in Shrink Small-Outline Package
With 25-mil Terminal Pitch
• Designed to Operate at 10 Million Transfers
Per Second
• Low Disabled Supply Current
1.4 mA Typical
• Thermal-Shutdown Protection
• Power-Up/Power-Down Glitch Protection
• Positive and Negative Output-Current
Limiting
• Open-Circuit Fail-Safe Receiver Design
description
The SN75LBC976 is a nine-channel differential
transceiver based on the 75LBC176 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.
The SN75LBC976 is packaged in a shrink
small-outline package (DL) with improved thermal
characteristics using heat-sink terminals. This
package is ideal for low-profile, space-restricted
applications such as hard disk drives.
DL 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 −}
Pins 13 through 17 and 40 through 44
are connected together to the package
lead frame and signal ground.
The switching speed and testing capabilities of the SN75LBC976 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 SN75LBC976 is characterized for operation from 0°C to 70°C.
† _{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.
Copyright  1995, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
2−1