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Product Detailed Parameters
- Description：DUAL 16-BY-4 REGISTER FILES
- Series：*
- Mfr：Rochester Electronics, LLC
- Package：Bulk
- Logic Type：-
- Output Type：-
- Number of Elements：-
- Number of Bits per Element：-
- Function：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The SN74AS870NT is a dual-port static random-access memory (SRAM) integrated circuit manufactured by Rochester Electronics. It belongs to the 74AS logic family and provides independent read/write access to two ports, facilitating data transfer between systems without bus contention. The device is housed in a plastic DIP package with 24 pins, designed for through-hole mounting on printed circuit boards.
Feature Summary
- Dual-port architecture enabling simultaneous independent access from two separate system buses
- Static RAM technology allowing indefinite data retention without periodic refresh cycles
- Compatible with standard TTL logic levels for straightforward interface integration
Applications
- Data buffering between asynchronous processing units
- Interfacing disparate digital systems requiring shared memory resources
- Temporary storage in high-speed data acquisition circuits
Procurement Notes
Verify the specific manufacturing lot date code and physical condition upon receipt, as this component may be sourced from surplus or obsolescence channels. Confirm that the pinout and electrical characteristics match the original design specifications before final integration into production hardware.
Selection Notes
Select this component when a design requires non-volatile-like persistence during power loss combined with high-speed concurrent access capabilities. Ensure the system voltage requirements align with the 5V operation typical of the AS series and that the DIP-24 footprint matches the existing board layout constraints.
Part Context
Rochester Electronics specializes in sourcing and distributing obsolete and hard-to-find semiconductor components. This part represents a continuation of availability for legacy Texas Instruments designs, ensuring supply chain stability for long-life industrial and aerospace applications where newer replacements are not viable.
Replacement Considerations
Direct functional substitutes include the SN74ALS870DWR and SN74AS870N. Verify package compatibility and speed grade differences when considering these alternatives.
