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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
- Clock Frequency：-
- Write Cycle Time - Word, Page：20ns
- 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：20 ns
- Grade：-
- Qualification：-
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Overview
The AS7C256A-20JIN is a 256 Kbit (32K x 8) asynchronous static random-access memory manufactured by Alliance Memory, Inc. It operates within a voltage range of 4.5 V to 5.5 V with a maximum supply current of 70 mA. The component features a 20 ns access time and utilizes a parallel interface. It is housed in a 28-pin Small Outline J-Lead (SOJ) package designed for surface mount technology. The device supports an industrial operating temperature range from -40°C to +85°C.
Feature Summary
- Asynchronous SRAM architecture providing fast data access without external clock synchronization
- Industrial-grade thermal stability ensuring reliable operation across wide temperature variations
- Single 5V power supply compatibility simplifying integration into standard logic systems
Applications
- Industrial control systems requiring robust memory under varying environmental conditions
- Embedded applications utilizing standard 5V logic families
- Data buffering in parallel interface communication modules
Procurement Notes
Verify the specific suffix 'JIN' corresponds to the SOJ-28 package and industrial temperature grade during procurement. Confirm RoHS compliance status as indicated in official documentation. Ensure handling procedures account for surface-mount requirements and electrostatic discharge sensitivity inherent to CMOS memory devices.
Selection Notes
Select this component when a 32K x 8 organization is required with 20 ns speed performance. It is suitable for designs needing 5V operation and industrial temperature resilience. Consider alternative packages like TSOP or PDIP if board space constraints differ. Verify that the parallel interface aligns with the host controller's memory bus capabilities.
Part Context
This part belongs to the AS7C256A series of high-speed CMOS SRAMs. The series offers various speed grades and packaging options including SOJ, TSOP, and PDIP. The 'J' suffix typically denotes the SOJ package variant, while 'I' indicates industrial temperature rating. This family provides non-volatile-like retention characteristics for volatile memory applications.
Replacement Considerations
Check for direct pin-compatible alternatives within the same manufacturer's portfolio offering different speed grades or package types. Verify electrical parameter equivalence for voltage and current specifications before substituting.
