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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)
DL PACKAGE
(TOP VIEW)
GND
BSR
CRE
1A
CDE2
CDE1
CDE0
9B+
9B−
8B+
1
56
55
54
53
52
51
50
2
• Meets or Exceeds the Requirements of
ANSI Standard RS-485 and
ISO 8482:1987(E)
3
4
1DE/RE
2A
2DE/RE
3A
3DE/RE
4A
4DE/RE
5
• Packaged in Shrink Small-Outline Package
6
With 25-mil Terminal Pitch
8B−
7
• Designed to Operate at 10 Million Transfers
8
49 7B+
48 7B−
Per Second
9
• Low Disabled Supply Current
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
6B+
6B−
1.4 mA Typical
• Thermal-Shutdown Protection
V
V
CC
CC
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
• Power-Up/Power-Down Glitch Protection
• Positive and Negative Output-Current
Limiting
• Open-Circuit Fail-Safe Receiver Design
V
V
CC
5A
CC
description
5B+
5B−
4B+
4B−
3B+
3B−
2B+
2B−
1B+
1B−
The SN75LBC976 is a nine-channel differential
5DE/RE
6A
6DE/RE
7A
7DE/RE
8A
8DE/RE
9A
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.
9DE/RE
Pins 13 through 17 and 40 through 44
are connected together to the package
lead frame and signal ground.
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.
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.
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Copyright 1995, Texas Instruments Incorporated
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2−1
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