32Meg x 8, 16Meg x16 256-MBIT SYNCHRONOUS DRAM The IS45S16160D-7CTNA1 is a 256Mb (16M x 16) Synchronous DRAM (SDRAM) manufactured by ISSI (Integrated Silicon Solution Inc.). Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Density:** 256Mb (16M words × 16 bits)
- **Organization:** 16M × 16
- **Voltage Supply:** 3.3V (±0.3V)
- **Speed Grade:** -7 (143 MHz clock frequency)
- **Access Time:** 5.4 ns (max)
- **Refresh Cycles:** 4K refresh cycles every 64ms
- **CAS Latency (CL):** 2, 3 programmable
- **Operating Temperature Range:** Commercial (0°C to +70°C)
- **Package:** 54-pin TSOP-II (Type II, 400 mil width)
### **Descriptions:**
- **Type:** Synchronous DRAM (SDRAM)
- **Interface:** Fully synchronous with a single 3.3V power supply
- **Burst Length:** Programmable (1, 2, 4, 8, or full page)
- **Burst Type:** Sequential or Interleaved
- **Auto Refresh & Self Refresh Modes:** Supported
- **Command Set:** Standard SDRAM commands (ACTIVE, READ, WRITE, PRECHARGE, etc.)
- **Bank Architecture:** 4 internal banks for concurrent operations
### **Features:**
- **High-Speed Operation:** Up to 143 MHz clock frequency
- **Low Power Consumption:** Auto and self-refresh modes reduce power
- **Programmable Burst Length:** Supports 1, 2, 4, 8, or full-page bursts
- **CAS Latency Options:** 2 or 3 cycles
- **Single 3.3V Power Supply:** Compatible with standard SDRAM interfaces
- **Industrial Standard Pinout:** 54-pin TSOP-II package
- **On-Die Termination (ODT):** Not supported (legacy SDRAM)
This SDRAM is commonly used in networking, telecommunications, and embedded systems requiring moderate-speed memory with a 16-bit data bus.
