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Product Detailed Parameters
- Description：IC SRAM 256KBIT PARALLEL 28SOJ
- Series：-
- Mfr：Alliance Memory, Inc.
- Package：Tape & Reel (TR)
- 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：10ns
- 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：10 ns
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Overview
The AS7C256A-10JCNTR is a 256 Kbit (32K x 8) asynchronous static random-access memory (SRAM) manufactured by Alliance Memory, Inc. It operates on a parallel interface with a maximum access time of 10 ns. The device supports a supply voltage range of 4.5 V to 5.5 V and draws a maximum current of 70 mA. It is housed in a 28-pin Small Outline J-Lead (SOJ) package designed for surface mount technology. The component is rated for commercial operating temperatures between 0°C and +70°C and is supplied in tape and reel packaging.
Feature Summary
- Asynchronous SRAM architecture providing fast data access via parallel interface
- CMOS technology ensuring low power consumption during operation
- Industrial-grade reliability within specified commercial temperature ranges
Applications
- Embedded systems requiring non-volatile-like temporary storage
- Consumer electronics utilizing 5V logic interfaces
- Industrial control units needing rapid data buffering
Procurement Notes
Verify the specific suffix 'JCNTR' confirms the SOJ package and tape-and-reel format. Ensure the design accommodates the 4.5V to 5.5V supply requirement. Confirm humidity sensitivity handling procedures are followed during assembly. Check RoHS compliance status against local regulatory requirements before finalizing procurement orders.
Selection Notes
Select this component when a 5V supply is available and a 28-pin SOJ footprint is required. Compare against TSOP variants if space constraints differ. Consider the 10 ns access speed for timing compatibility. Evaluate alternative packages like TSSOP if lead bending is a concern during PCB assembly processes.
Part Context
This part belongs to the AS7C256A family of 256 Kbit SRAMs. Variants exist with different access times, voltages, and packages. The 'J' indicates the SOJ package style, while 'CNTR' specifies commercial temperature and tape-and-reel delivery. This distinguishes it from industrial temperature or tray-packaged equivalents.
Replacement Considerations
Direct substitutes include AS7C256A-10JIN (tube packaging) or AS7C256A-10TIN (TSOP package). Verify pin compatibility and voltage levels when swapping package types. Cross-reference datasheets for identical electrical characteristics to ensure functional equivalence.
