NAT9914BPDF-9

Controllers Overview

The NAT9914BPDF-9 is a RoHS-compliant, low-power CMOS IEEE 488 controller chip designed as a drop-in replacement for the Texas Instruments TMS9914A in a 40-pin DIP package. It maintains 100% register and pin compatibility with the TI device upon power-up while adding full IEEE 488.2 Controller functionality derived from the NAT4882. The component supports programmable clock inputs up to 20 MHz, enabling increased performance without substantial firmware changes. It features automatic EOS/NL message detection, DMA transfer handling, and programmable data transfer rates with T1 delays of 350 ns, 500 ns, 1.1 µs, and 2 µs.

Controllers Feature Summary

• IEEE 488.2 Compliance: Meets all ANSI/IEEE Standard 488.2-1992 requirements including bus-line monitoring and preferred service request implementation.
• Drop-In Compatibility: Identical pin configuration and register set to the TI TMS9914A on power-up for seamless integration.
• Enhanced Functionality: Supports complete Talker, Listener, and Controller functions with software-accessible IEEE 488.2 features.
• Flexible Clocking: Accepts clock input values up to 20 MHz for improved performance compared to the standard 5 MHz default.

Controllers Applications

• GPIB interface development for electronic measurement equipment
• Data acquisition systems requiring IEEE 488 communication
• Laboratory instrument control and automation

Controllers Procurement Notes

Verify that the specific part number NAT9914BPDF-9 corresponds to the RoHS-compliant version of the NAT9914BPD in a 40-pin DIP package. Confirm that the 'F' suffix indicates the matte pure tin lead finish and that the -9 suffix denotes the specific ordering variant. Ensure compliance with JEDEC JESD97 marking recommendations if required for your assembly process.

Controllers Selection Notes

Select this component when upgrading from the TI TMS9914A to gain IEEE 488.2 capabilities without hardware redesign. It is suitable for designs requiring higher clock speeds up to 20 MHz or those needing NEC 7210 register-compatible mode via software command. Consider the 40-pin DIP package constraint and verify thermal management for the low-power CMOS design.

Controllers Part Context

The NAT9914 series serves as a direct successor to legacy GPIB controllers, bridging the gap between older IEEE 488.1 standards and modern IEEE 488.2 requirements. It allows manufacturers to maintain existing hardware layouts while accessing advanced bus management features. The BPDF variant specifically addresses through-hole assembly needs with RoHS compliance.

Controllers Replacement Considerations

This component is a direct replacement for the TI TMS9914A. No other substitute part numbers are publicly confirmed in the provided documentation.

Controllers FAQ

Does the NAT9914BPDF-9 support the NEC 7210 register set?

Yes, the NAT9914 can run in NEC 7210 register-compatible mode via a software command, although it is not pin compatible with the NEC µPD7210.

What is the maximum clock frequency supported by the NAT9914?

The NAT9914 supports clock input values up to 20 MHz, which is higher than the default 5 MHz input.

How does the NAT9914 handle End-or-Identify (EOI) messages?

It features automatic EOS and/or NL message detection to manage bus signaling efficiently.