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Product Detailed Parameters
- Description：IC SRAM 256KBIT PAR 28TSOP I
- 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：12ns
- Voltage - Supply：4.5V ~ 5.5V
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：28-TSSOP (0.465", 11.80mm Width)
- Supplier Device Package：28-TSOP I
- Access Time：12 ns
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Overview
The AS7C256A-12TINTR is a 256 Kbit (32K x 8) asynchronous static random-access memory (SRAM) manufactured by Alliance Memory, Inc. It operates with a supply voltage range of 3.0 V to 3.6 V and features a maximum access time of 12 ns. The device is housed in a 28-pin TSOP I surface-mount package and supports parallel interface communication. Designed for industrial applications, it functions within a temperature range of -40°C to +85°C. Maximum power supply current is specified at 160 mA. The component is supplied in tape and reel packaging.
Feature Summary
- Asynchronous parallel SRAM architecture for direct data access
- Industrial-grade thermal stability for extended operating environments
- Surface-mount TSOP I packaging for compact board integration
Applications
- Industrial control systems requiring reliable volatile storage
- Embedded devices utilizing 3.3V logic interfaces
- Data buffering in high-speed parallel processing circuits
Procurement Notes
Verify the specific suffix 'IN' confirms the industrial temperature grade (-40°C to +85°C) and 3.3V operation. Confirm the 'TR' designation indicates tape and reel packaging rather than tube or tray formats. Ensure compatibility with 3.3V logic levels before integration into existing 5V designs.
Selection Notes
Select this component when a 256 Kbit capacity is required with 12 ns speed in a 3.3V environment. The TSOP I form factor suits space-constrained PCB layouts. Verify that the parallel interface aligns with the host controller's memory bus capabilities and that the industrial temperature rating meets the operational requirements.
Part Context
This part belongs to the AS7C256A family of asynchronous SRAMs from Alliance Memory. It shares architectural similarities with other members like the AS7C256A-10TIN but differs in speed grade and voltage specifications. The series provides non-volatile-free storage solutions for various embedded memory needs.
Replacement Considerations
AS7C256A-10TIN offers similar capacity but operates at 5V and 10 ns speed. AS7C3256A-12TIN provides identical electrical characteristics but uses a different pinout and package type. Direct substitution requires verifying voltage compatibility and physical footprint constraints.
