TS68882VF1-20

Overview

The TS68882VF1-20 is an enhanced floating-point co-processor designed for the Thomson TS68000 family of microprocessors. It implements the IEEE 754 standard and serves as a pin-and-software compatible upgrade to the TS68881, offering over 1.5 times the performance. The device features eight 80-bit extended precision data registers, a 67-bit arithmetic unit, and a 67-bit barrel shifter. Operating at 20 MHz with a 5V supply, it supports concurrent instruction execution with host processors like the TS68020/TS68030. Packaged in a 68-pin Ceramic Quad Flat Pack (CQFP), it operates within a temperature range of -40°C to +85°C.

Feature Summary

• Full IEEE 754 compliance with support for seven data types including byte, word, long integers, single/double/extended precision reals, and packed BCD strings.
• Integrated hardware for high-speed conversion between memory formats and internal extended precision format, plus twenty-two on-chip ROM constants.
• Independent state machine controlling main processor communication for pipelined instruction processing and fully concurrent execution.
• HCMOS implementation providing high speed and low power consumption compared to comparable HMOS devices.

Applications

• Co-processor extension for TS68020 and TS68030 32-bit microprocessors.
• Peripheral processor integration with TS68000 and TS68010 systems.
• Applications requiring high-performance floating-point arithmetic beyond integer capabilities.

Procurement Notes

Verify that the specific suffix 'F' corresponds to the CQFP package variant as indicated in the datasheet. Confirm the operating temperature grade matches the 'V' suffix requirements (-40°C to +85°C). Ensure the host system utilizes the TS68000 family bus interface protocol for proper synchronization and exception handling.

Selection Notes

Select this component when upgrading from a TS68881 to gain improved performance without software changes. Ensure the host processor supports the TS68000 co-processor interface. Verify that the system design accommodates the 68-pin CQFP footprint and provides adequate thermal management, noting the junction-to-ambient thermal resistance of 33 °C/W for ceramic packages.

Part Context

The TS68882 is part of the Thomson/Atmel-Grenoble floating-point co-processor lineage. It is functionally similar to the MC68882 but optimized for the TS68000 architecture. The device is available in multiple speed grades (16.67, 20, 25, and 33 MHz) and package options including PGA and CQFP.

Replacement Considerations

The TS68881 is a direct predecessor with lower performance. The MC68882 is a functional equivalent from Motorola but may require verification of timing compatibility with the specific TS68000 host implementation.