TNT4882-BQ66

Overview

The NI TNT4882-BQ66 is a single-chip IEEE 488.2 Talker/Listener interface for GPIB applications. It integrates the NAT4882 controller ASIC, Turbo488 performance enhancement, and a GPIB transceiver into a 100-pin QFP package. The device supports data transfer rates up to 1.5 MB/s using IEEE 488.1 handshaking and up to 8 MB/s with HS488 protocols. It allows direct code migration from existing register sets of the NAT4882, NEC µPD7210, and TI TMS9914A.

Feature Summary

• Single-chip IEEE 488.2 Talker/Listener interface combining controller ASIC, Turbo488, and transceiver
• Supports transfer rates of 1.5 MB/s (IEEE 488.1) and 8 MB/s (HS488)
• Compatible with NAT4882, NEC µPD7210, and TI TMS9914A register sets for direct code porting
• Available in a 100-pin surface-mount plastic quad flat pack (QFP)

Applications

• GPIB-based instrument design
• PCI-based IEEE 488 systems (via TNT500X integration context)
• Legacy system upgrades requiring NAT4882 or µPD7210 compatibility

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and quantity. The BQ66 suffix indicates a 66-piece tray configuration. Ensure compliance with RoHS directives if required by the application environment. Confirm lead times and availability directly with authorized distributors as supply chain conditions vary.

Selection Notes

Select the TNT4882 when a single-chip solution for GPIB communication is required without external transceivers. Choose this component if migrating software from NAT4882, µPD7210, or TMS9914A architectures to reduce development time. Consider the 100-pin QFP package constraints for PCB layout. Evaluate the need for HS488 high-speed support versus standard IEEE 488.1 operation.

Part Context

The TNT4882 is part of National Instruments' GPIB interface family, designed to replace multi-component solutions. It serves as a foundational component for GPIB controllers and interfaces. Related components include the TNT500X, which adds PCI bus integration, and the NAT4882, which provides basic controller functionality without the integrated transceiver.

Replacement Considerations

Direct replacements are limited due to the proprietary nature of the TNT4882 architecture. The TNT500X offers enhanced features including PCI integration but requires different interface handling. Legacy designs using NAT4882, µPD7210, or TMS9914A can migrate to the TNT4882 with minimal code changes, maintaining register compatibility.