N74F786D,602

Specialty Logic Overview

The N74F786D,602 is a 4-bit asynchronous bus arbiter manufactured by NXP USA Inc. in the 74F series. It operates on a first-come first-served priority basis with separate grant outputs for each input and a common output enable pin. The device includes an onboard 4-input AND gate. It features metastable-free outputs and supports commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges. Typical propagation delay is 6.6ns with a total supply current of 55mA at VCC = 5V.

Specialty Logic Feature Summary

• Arbitrates between four asynchronous inputs using a first-come first-served logic scheme
• Provides separate bus grant outputs for each request input alongside a common enable control
• Integrates a dedicated 4-input AND gate for independent logic operations
• Designed to prevent glitching or metastable conditions during simultaneous request contention

Specialty Logic Applications

• High-speed real-time arbitration systems
• Bus request management in multi-master architectures
• Asynchronous logic control circuits

Specialty Logic Procurement Notes

Verify component authenticity through authorized distributors as this part may be obsolete. Confirm package type matches design requirements since the D suffix indicates SOIC packaging. Check RoHS compliance status against specific manufacturing dates. Ensure voltage levels align with system specifications before integration.

Specialty Logic Selection Notes

Select this component when asynchronous arbitration with guaranteed metastable-free operation is required. Consider the integrated AND gate functionality for simplified circuit designs. Verify that the 74F series speed and power characteristics suit the application constraints compared to other logic families.

Specialty Logic Part Context

This device belongs to the 74F family of high-speed TTL logic components originally developed by Philips Semiconductors. The N74F786 specifically addresses bus arbitration needs in digital systems requiring deterministic response times without complex external logic.

Specialty Logic Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

Specialty Logic FAQ

How does the device handle simultaneous bus requests?

If two or more BRn inputs are asserted simultaneously, one is selected at random while all BGn outputs remain high until selection is complete, preventing erroneous grants.

What is the function of the EN pin?

The EN pin acts as a common enable input; when low, it enables the BG0-BG3 outputs, and when high, it forces all grant outputs high.