SN75976A-EP Datasheet, PDF (1/29 Pages) Texas Instruments – 9-CHANNEL DIFFERENTIAL TRANSCEIVER

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SN75976A-EP
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SLLS878A – JANUARY 2008 – REVISED FEBRUARY 2008
FEATURES
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• Controlled Baseline
– One Assembly Site
– One Test Site
– One Fabrication Site
• Extended Temperature Performance of –55°C
to 125°C
• Enhanced Diminishing Manufacturing Sources
(DMS) Support
• Enhanced Product-Change Notification
• Qualification Pedigree ⁽¹⁾
• Designed to Operate at up to 20 Million Data
Transfers per Second (Fast-20 SCSI)
• Nine Differential Channels for the Data and
Control Paths of the Small Computer Systems
Interface (SCSI) and Intelligent Peripheral
Interface (IPI)
• SN75976A Packaged in Thin Shrink
Small-Outline Package with 20-Mil Terminal
Pitch (DGG)
• Two Skew Limits Available
• ESD Protection on Bus Terminals Exceeds
12 kV
• Low Disabled Supply Current 8 mA Typical
• Thermal Shutdown Protection
• Positive and Negative Current Limiting
• Power-Up/Down Glitch Protection
(1) Component qualification in accordance with JEDEC and
industry standards to ensure reliable operation over an
extended temperature range. This includes, but is not limited
to, Highly Accelerated Stress Test (HAST) or biased 85/85,
temperature cycle, autoclave or unbiased HAST,
electromigration, bond intermetallic life, and mold compound
life. Such qualification testing should not be viewed as
justifying use of this component beyond specified
performance and environmental limits.
DGG 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 V_CC
38 5B+
37 5B −
36 4B+
35 4B −
34 _3B+
33 _{3B −}
32 _2B+
31 _{2B −}
30 _1B+
29 _{1B −}
Terminals 13 through 17 and 40 through 44 are con-
nected together to the package lead frame
and signal ground.
DESCRIPTION/ORDERING INFORMATION
The SN75976A is an improved replacement for the industry's first 9-channel 485 transceiver – the SN75LBC976.
The A version offers improved switching performance, a smaller package, and higher ESD protection. The
SN75976A is offered in two versions. The '976A2 skew limits of 4 ns for the differential drivers and 5 ns for the
differential receivers complies with the recommended skew budget of the Fast-20 SCSI standard for data transfer
rates up to 20 million transfers per second. The '976A1 supports the Fast SCSI skew budget for 10 million
transfers per second. The skew limit ensures that the propagation delay times, not only from channel-to-channel
but from device-to-device, are closely matched for the tight skew budgets associated with high-speed parallel
data buses.
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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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated