The IS61C256AH-20JI is a high-speed, low-power 256K x 1 Static RAM (SRAM) manufactured by ISSI (Integrated Silicon Solution Inc.). It's designed for applications requiring fast memory access and low power consumption, such as cache memory, embedded systems, and portable devices.

Applications

• Cache Memory: Used as cache memory in processors and controllers to improve system performance by providing fast access to frequently used data.
• Embedded Systems: Employed in embedded systems for storing program code, data buffers, and look-up tables.
• Portable Devices: Integrated into battery-powered portable devices like PDAs, mobile phones, and handheld instruments to minimize power consumption.
• Digital Signal Processing (DSP): Utilized in DSP systems for storing intermediate results and coefficients during signal processing operations.
• Networking Equipment: Used in routers, switches, and other networking devices for buffering data packets and storing routing tables.

Features

• 256K x 1 Organization: Provides a memory capacity of 256 kilobits, organized as 256,000 words of 1 bit each.
• High-Speed Access Time: Offers a fast access time of 20ns, enabling quick data retrieval and storage.
• Low Power Consumption: Minimizes power consumption in both active and standby modes, extending battery life.
• Single 5V Power Supply: Operates from a single 5V power supply, simplifying system design.
• TTL-Compatible Inputs and Outputs: Compatible with standard TTL logic levels, facilitating easy integration with other components.
• Three-State Output: Provides a three-state output, allowing multiple devices to share the same data bus.
• Available in JEDEC Standard Packages: Offered in industry-standard packages like SOJ, making it easy to replace existing SRAM devices.

Benefits

• Fast Performance: High-speed access time improves system performance and responsiveness.
• Low Power: Extends battery life in portable devices and reduces overall power consumption.
• Easy Integration: TTL-compatible inputs and outputs simplify system design and integration.
• Reliable Data Storage: Provides non-volatile memory storage for critical data.
• Cost-Effective Solution: Offers a competitive price per bit compared to other memory technologies.

Additional Details

The IS61C256AH-20JI operates over the commercial temperature range (0°C to +70°C). The datasheet provides detailed information on timing characteristics, electrical parameters, and package dimensions. The device also offers data retention capabilities, ensuring data integrity even when power is removed.