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Product Detailed Parameters
- Description：IC SRAM 256KBIT PARALLEL 28SOJ
- Series：-
- Mfr：Alliance Memory, Inc.
- Package：Tube
- Memory Type：Volatile
- Memory Format：SRAM
- Technology：SRAM - Asynchronous
- Memory Size：256Kbit
- Memory Organization：32K x 8
- Memory Interface：Parallel
- Write Cycle Time - Word, Page：12ns
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：28-BSOJ (0.300", 7.62mm Width)
- Supplier Device Package：28-SOJ
- Access Time：12 ns
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Overview
The AS7C256A-12JIN is a 256 Kbit (32K x 8) asynchronous static random-access memory manufactured by Alliance Memory. It operates within a supply voltage range of 4.5 V to 5.5 V and features a maximum access time of 12 ns. The component is housed in a 28-pin Small Outline J-Lead (SOJ) package designed for surface-mount technology. It supports an industrial operating temperature range from -40°C to +85°C and has a maximum power supply current of 70 mA.
Feature Summary
- Asynchronous parallel interface for standard data transfer operations
- Industrial-grade thermal stability suitable for extended temperature environments
- Surface-mount SOJ packaging optimized for compact circuit board layouts
Applications
- Industrial control systems requiring reliable volatile memory storage
- Embedded applications operating within specified voltage and temperature limits
- General-purpose data buffering in electronic circuits
Procurement Notes
Verify the specific suffix JIN confirms the SOJ package and industrial temperature rating against official datasheets. Confirm RoHS compliance status as indicated in manufacturer documentation. Ensure design-in compatibility with 5V logic levels and 12 ns timing requirements before finalizing procurement decisions.
Selection Notes
Select this component when a 256 Kbit capacity with 12 ns speed is required in a 28-pin SOJ form factor. It is appropriate for designs needing industrial temperature tolerance (-40°C to +85°C). Compare against other AS7C256A variants if different packages or speeds are needed, ensuring voltage and pinout compatibility.
Part Context
This part belongs to the AS7C256A series of asynchronous SRAMs from Alliance Memory. The series offers various speed grades and packaging options. The AS7C256A-12JIN specifically denotes the 12 ns speed grade in the industrial temperature range using the SOJ-28 package, distinguishing it from commercial or alternative package versions.
Replacement Considerations
Check for other speed grades within the AS7C256A series if timing constraints allow. Verify equivalent parts from other manufacturers offering 256 Kbit SRAM in SOJ-28 packages with matching voltage and temperature specifications.
