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Product Detailed Parameters
- Description：27S03ALM/B
- Series：-
- Mfr：Rochester Electronics, LLC
- Package：Bulk
- Memory Type：-
- Memory Format：-
- Technology：-
- Memory Size：-
- Memory Organization：-
- Memory Interface：-
- Clock Frequency：-
- Write Cycle Time - Word, Page：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Access Time：-
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Overview
The 27S03ALM/B is a 64-bit, low-power bipolar SRAM manufactured by Rochester Electronics. It operates within a supply voltage range of 4.5V to 5.5V and supports data rates up to 100ns access time. The device features a single power supply configuration with true output polarity. It is housed in a 28-pin PLCC package and is designed for industrial temperature ranges from -40°C to +85°C. This component serves as a legacy memory solution for systems requiring reliable static random-access memory functionality.
Feature Summary
- Provides 64-bit storage capacity using low-power bipolar technology
- Features fast access times suitable for high-speed data retrieval
- Operates on a single positive voltage supply rail
- Delivers true output logic levels without inversion
Applications
- Industrial control system memory buffers
- Legacy embedded computing hardware maintenance
- Telecommunications equipment data storage
- Test and measurement instrument internal memory
Procurement Notes
Verify the specific suffix designation matches the required pinout and electrical characteristics. Confirm RoHS compliance status as older batches may differ. Ensure the supplier provides traceability documentation for authorized sourcing. Check moisture sensitivity level requirements before assembly. Validate that the package type aligns with existing PCB footprints.
Selection Notes
Select this component when replacing obsolete original manufacturer SRAM chips in existing designs. Consider the 28-pin PLCC footprint compatibility during board upgrades. Evaluate power consumption requirements against system thermal constraints. Verify operating temperature range suitability for the intended environment. Assess interface speed requirements against system clock speeds.
Part Context
Rochester Electronics specializes in lifecycle management for semiconductors, providing authorized sources for end-of-life parts. The 27S03ALM/B represents their capability to maintain supply of critical legacy components. This part falls under the broader category of static random-access memory used in various electronic applications.
Replacement Considerations
Direct substitutes include other 64-bit bipolar SRAMs in PLCC-28 packages. Verify pin-to-pin compatibility before substitution. Check voltage tolerance and access time specifications. Ensure logical function remains identical to the original design intent.
