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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
- 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-20JINTR is a 256 Kbit asynchronous 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. It is housed in a 28-pin Small Outline J-Lead (SOJ) package designed for surface mount technology. The device is rated for an industrial operating temperature range from -40°C to +85°C.
Feature Summary
- Asynchronous SRAM architecture providing high-performance data access
- CMOS technology ensuring low power consumption during operation
- Industrial temperature rating suitable for demanding environmental conditions
Applications
- Embedded systems requiring non-volatile-like temporary storage
- Industrial control units operating in extreme temperatures
- Communication equipment buffer memory applications
Procurement Notes
Verify the specific suffix 'IN' confirms the industrial temperature grade (-40°C to +85°C) and the 'TR' indicates tape and reel packaging. Confirm the 28-pin SOJ footprint matches the target PCB design. Ensure voltage requirements align with the 4.5V to 5.5V specification before integration.
Selection Notes
Select this component when a 256 Kbit capacity with 20 ns speed is required in a 28-pin SOJ form factor. It is appropriate for designs needing industrial temperature stability. Compare against TSOP or PDIP variants if different pin counts or commercial temperature ranges are acceptable for the application.
Part Context
This part belongs to the AS7C256A family of 256 Kbit CMOS SRAMs. The series offers various access speeds and package options including SOJ, TSOP, and PDIP. The AS7C256A-20JINTR specifically combines the 20 ns speed grade with the industrial temperature range and tape-and-reel packaging format.
Replacement Considerations
Check for AS7C256A-12JINTR for faster 12 ns performance in the same package. Consider AS7C256A-10TIN for TSOP I packaging alternatives. Verify pin compatibility before substituting with other manufacturers' 256 Kbit SRAMs.
