SN74F1056DR

Specialty Logic Overview

The SN74F1056DR is an 8-bit Schottky barrier diode bus-termination array manufactured by Texas Instruments. It consists of eight high-speed diodes suitable for clamping to ground, designed to reduce reflection noise on memory bus lines. The device operates within a temperature range of 0°C to 70°C and utilizes a 16-pin SOIC (D) package. Key electrical characteristics include a static reverse current of 2 µA at 7 V, a typical forward voltage of 0.8 V at 18 mA, and a total capacitance of 3 pF at 2 V. The repetitive peak forward current rating is 300 mA per terminal.

Specialty Logic Feature Summary

• Designed to suppress negative transients caused by transmission-line reflections, crosstalk, and switching noise in memory bus systems.
• Provides an 8-bit array structure optimized for bus-oriented applications without the power consumption drawbacks of resistor termination schemes.
• Utilizes Schottky barrier technology to achieve fast switching speeds and low capacitance for high-frequency signal integrity.

Specialty Logic Applications

• Clamping negative transients on DRAM, SRAM, and EPROM memory bus lines.
• Suppressing undershoot on clock lines of clocked devices.
• Terminating long stubs branching off main transmission lines or backplane slots.

Specialty Logic Procurement Notes

Verify the specific ordering suffix 'DR' corresponds to the tape-and-reel packaging configuration with a standard quantity of 2500 units. Confirm that the active production status aligns with current supply chain requirements. Ensure the SOIC-16 package dimensions match the target PCB footprint constraints. Validate RoHS compliance and moisture sensitivity level ratings against assembly process specifications.

Specialty Logic Selection Notes

Select this component when application requirements demand effective suppression of negative voltage transients on high-speed digital buses. The Schottky barrier construction offers superior performance compared to standard diodes regarding switching speed and leakage current. Consider the 8-bit parallel architecture for efficient termination of wide data buses where discrete components would increase board space and parasitic inductance.

Specialty Logic Part Context

This device belongs to the SN74F series of semiconductor products from Texas Instruments. It functions as a specialized passive termination array rather than an active logic gate. The SN74F1056 complements other F-series components by providing signal integrity solutions for memory interfaces, addressing issues like ringing and overshoot that can compromise system reliability in high-speed digital designs.

Specialty Logic Replacement Considerations

The SN74F1056D is listed as an obsolete alternative to the SN74F1056DR variant. Verify pinout compatibility and package dimensions before substituting between these forms. No other direct functional equivalents are documented in the provided source material.