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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：0°C ~ 70°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-20JCN is a 256 Kbit Static Random-Access Memory (SRAM) device manufactured by Alliance Memory, Inc. It features a memory organization of 32K x 8 bits and operates with a maximum access time of 20 ns. The component supports a parallel interface and requires a supply voltage between 4.5 V and 5.5 V. Maximum power consumption is specified at 100 mA. It is housed in a 28-pin Small Outline J-Lead (SOJ) package designed for surface mount technology. The device is rated for commercial temperature operation ranging from 0°C to +70°C.
Feature Summary
- High-performance CMOS technology for reliable static random-access memory operations
- Asynchronous parallel interface supporting standard memory control signals
- Industrial-grade packaging suitable for surface mount assembly processes
Applications
- Embedded systems requiring non-volatile data retention during power cycles
- Industrial control units utilizing asynchronous memory interfaces
- Consumer electronics devices operating within commercial temperature ranges
Procurement Notes
Verify the specific suffix 'JCN' against official Alliance Memory documentation to confirm the exact pinout configuration, voltage range, and temperature grade. Ensure compatibility with existing PCB footprints for the 28-SOJ package. Confirm that the 5V logic levels match the system requirements before integration.
Selection Notes
Select this component when a 256 Kbit capacity with 20 ns access speed is required for 5V applications. The 28-SOJ package is appropriate for designs needing surface-mount solutions with specific thermal and mechanical constraints. Consider the commercial temperature range limits when evaluating environmental exposure scenarios.
Part Context
This part belongs to the AS7C256A family of high-performance CMOS SRAMs. The series offers various access times and package options to suit different design needs. The AS7C256A-20JCN specifically targets commercial applications requiring moderate speed and standard 5V operation in a compact surface-mount form factor.
Replacement Considerations
Check for direct cross-references such as AS7C256A-20JIN for industrial temperature variants or AS7C256A-12JCN for faster access times. Verify pin compatibility and electrical specifications before substituting.
