SN75976A-EP Series

Enhanced Product 9 Channel Differential Transceiver

Catalog

Enhanced Product 9 Channel Differential Transceiver

Part	Voltage - Supply [Min]	Voltage - Supply [Max]	Supplier Device Package	Receiver Hysteresis	Operating Temperature [Max]	Operating Temperature [Min]	Protocol	Mounting Type	Number of Drivers/Receivers [custom]	Number of Drivers/Receivers [custom]	Duplex	Type	Package / Case	Package / Case	Package / Case
Texas Instruments SN75976A2DGGR	4.5 V	5.5 V	56-TSSOP	45 mV	70 °C	0 °C	RS422 RS485	Surface Mount	9	9	Half	Transceiver	6.1 mm	0.24 in	56-TFSOP
Texas Instruments SN75976A1MDGGREP	4.75 V	5.25 V	56-TSSOP	45 mV	125 °C	-55 °C	RS422 RS485	Surface Mount	9	9	Half	Transceiver	6.1 mm	0.24 in	56-TFSOP
Texas Instruments SN75976A2DGGG4	4.5 V	5.5 V	56-TSSOP	45 mV	70 °C	0 °C	RS422 RS485	Surface Mount	9	9	Half	Transceiver	6.1 mm	0.24 in	56-TFSOP
Texas Instruments SN75976A2DLR	4.5 V	5.5 V	56-SSOP	45 mV	70 °C	0 °C	RS422 RS485	Surface Mount	9	9	Half	Transceiver	7.5 mm	0.295 in	56-BSSOP
Texas Instruments SN75976A1DL	4.75 V	5.25 V	56-SSOP	45 mV	70 °C	0 °C	RS422 RS485	Surface Mount	9	9	Half	Transceiver	7.5 mm	0.295 in	56-BSSOP
Texas Instruments SN75976A1DGG	4.75 V	5.25 V	56-TSSOP	45 mV	70 °C	0 °C	RS422 RS485	Surface Mount	9	9	Half	Transceiver	6.1 mm	0.24 in	56-TFSOP

Catalog

Enhanced Product 9 Channel Differential Transceiver

Key Features

• Controlled BaselineOne Assembly SiteOne Test SiteOne Fabrication SiteExtended Temperature Performance of –55°C to 125°CEnhanced Diminishing Manufacturing Sources (DMS) SupportEnhanced Product-Change NotificationQualification 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 AvailableESD Protection on Bus Terminals Exceeds12 kVLow Disabled Supply Current 8 mA TypicalThermal Shutdown ProtectionPositive and Negative Current LimitingPower-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 specifiedperformance and environmental limits.Controlled BaselineOne Assembly SiteOne Test SiteOne Fabrication SiteExtended Temperature Performance of –55°C to 125°CEnhanced Diminishing Manufacturing Sources (DMS) SupportEnhanced Product-Change NotificationQualification 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 AvailableESD Protection on Bus Terminals Exceeds12 kVLow Disabled Supply Current 8 mA TypicalThermal Shutdown ProtectionPositive and Negative Current LimitingPower-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 specifiedperformance and environmental limits.

Description

The SN75976A is an improved replacement for the industry's first 9-channel RS-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. The patented thermal enhancements made to the 56-pin shrink small-outline package (SSOP) of the SN75976 have been applied to the new, thin shrink, small-outline package (TSSOP). The TSSOP package offers even less board area requirements than the SSOP while reducing the package height to 1 mm. This provides more board area and allows component mounting to both sides of the printed circuit boards for low-profile, space-restricted applications such as small form-factor hard disk drives. In addition to speed improvements, the '976A can withstand electrostatic discharges exceeding 12 kV using the human-body model, and 600 V using the machine model of MIL-PRF-38535, Method 3015.7 on the RS-485 I/O terminals. This is six times the industry standard and provides protection from the noise that can be coupled into external cables. The other terminals of the device can withstand discharges exceeding 4 kV and 400 V respectively. Each of the nine channels of the '976A typically meet or exceed the requirements of EIA RS-485 (1983) and ISO8482-1987/TIA TR30.2 referenced by American National Standard of Information (ANSI) Systems, X3.131-1994 (SCSI-2) standard, X2.277-1996 (Fast-20 Parallel Interface), and the Intelligent Peripheral Interface Physical Layer-ANSI X3.129-1986 standard. The SN75976A is characterized for operation over an ambient air temperature range of 0°C to 70°C. The SN55976A is characterized for operation over an ambient air temperature range of -55°C to 125°C. The SN75976A is an improved replacement for the industry's first 9-channel RS-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. The patented thermal enhancements made to the 56-pin shrink small-outline package (SSOP) of the SN75976 have been applied to the new, thin shrink, small-outline package (TSSOP). The TSSOP package offers even less board area requirements than the SSOP while reducing the package height to 1 mm. This provides more board area and allows component mounting to both sides of the printed circuit boards for low-profile, space-restricted applications such as small form-factor hard disk drives. In addition to speed improvements, the '976A can withstand electrostatic discharges exceeding 12 kV using the human-body model, and 600 V using the machine model of MIL-PRF-38535, Method 3015.7 on the RS-485 I/O terminals. This is six times the industry standard and provides protection from the noise that can be coupled into external cables. The other terminals of the device can withstand discharges exceeding 4 kV and 400 V respectively. Each of the nine channels of the '976A typically meet or exceed the requirements of EIA RS-485 (1983) and ISO8482-1987/TIA TR30.2 referenced by American National Standard of Information (ANSI) Systems, X3.131-1994 (SCSI-2) standard, X2.277-1996 (Fast-20 Parallel Interface), and the Intelligent Peripheral Interface Physical Layer-ANSI X3.129-1986 standard. The SN75976A is characterized for operation over an ambient air temperature range of 0°C to 70°C. The SN55976A is characterized for operation over an ambient air temperature range of -55°C to 125°C.