1FEATURES

· 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

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.