TNT4882-BQF66

Overview

The NI TNT4882-BQF66 is a RoHS-compliant single-chip IEEE 488.2 Talker/Listener ASIC designed for GPIB interfaces. It integrates the circuitry of the NAT4882, Turbo488, and GPIB transceivers into a 100-pin plastic quad flat pack (QFP) surface-mount package. The device supports data transfer rates exceeding 1.5 MB/s using IEEE 488.1 handshaking and up to 8 MB/s with the HS488 high-speed protocol. It includes a 32-byte FIFO buffer, DMA capability, and emulates NEC µPD7210 or TI TMS9914A controllers via software configuration.

Feature Summary

• Integrates NAT4882, Turbo488, and GPIB transceiver circuits for single-chip IEEE 488.2 implementation
• Supports HS488 protocol for data transfer rates up to 8 MB/s
• Features a 32-byte FIFO buffer and DMA capability for efficient data handling
• RoHS compliant with matte pure tin lead finish

Applications

• IEEE 488 instrument designs requiring compact size and high performance
• Systems utilizing ISA bus interfaces without external glue logic
• Multi-channel programmable power supplies controlled via GPIB

Procurement Notes

Verify that the specific part number TNT4882-BQF66 corresponds to the RoHS-compliant variant with a matte pure tin finish. Confirm the package type is 100-pin QFP and check for any specific moisture sensitivity level requirements during storage and soldering processes.

Selection Notes

Select this component when migrating from legacy NAT4882, NEC µPD7210, or TI TMS9914A designs to reduce software development time. Choose the BQF66 suffix for RoHS compliance. Ensure the host system architecture can support the desired transfer rates, as maximum speeds depend on the CPU interface.

Part Context

The TNT4882 replaces the discrete combination of the Turbo488 and NAT4882 chips. It offers backward compatibility by powering up in two-chip mode, allowing direct code porting from existing systems while enabling one-chip mode for improved performance in new designs.

Replacement Considerations

The TNT4882-BQF66 serves as a direct replacement for the standard TNT4882-BQ66, differing only in RoHS compliance and lead finish. It also replaces the separate Turbo488/NAT4882 chipset in legacy designs.