256K x 16, 256K x 18 SYNCHRONOUS PIPELINED STATIC RAM The IS61SP25618-133B is a high-speed synchronous SRAM manufactured by ISSI (Integrated Silicon Solution, Inc.). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Density:** 4Mb (256K x 18-bit)
- **Organization:** 262,144 words × 18 bits
- **Voltage Supply:** 3.3V (±10%)
- **Speed:** 133 MHz (7.5 ns access time)
- **Package:** 54-pin TSOP II
- **Operating Temperature Range:** Commercial (0°C to +70°C) or Industrial (-40°C to +85°C)
- **I/O Type:** Common I/O (shared data input/output)
- **Interface:** Synchronous (pipelined or flow-through output options)
- **Refresh:** Not required (SRAM)
### **Descriptions:**
- The IS61SP25618-133B is a high-performance CMOS synchronous static RAM designed for applications requiring high-speed data access.
- It supports burst mode operation for efficient data transfer.
- Features a self-timed write cycle for simplified timing control.
### **Features:**
- **High-Speed Operation:** 7.5 ns clock-to-data access time.
- **Synchronous Pipeline/Flow-Through Output:** Configurable for performance optimization.
- **Burst Mode Support:** Linear or interleaved burst sequences.
- **Single 3.3V Power Supply:** Low power consumption.
- **Byte Write Control:** Individual byte write enable (UB, LB) for flexible data handling.
- **ZZ (Sleep) Mode:** Power-down feature for reduced standby current.
- **JEDEC-Standard Pinout:** Compatible with other industry-standard SRAMs.
This information is strictly based on the manufacturer's datasheet for the IS61SP25618-133B.
