4Meg x 32 128-MBIT SYNCHRONOUS DRAM The IS42S32400D-7BL is a SDRAM (Synchronous Dynamic Random Access Memory) chip manufactured by ISSI (Integrated Silicon Solution, Inc.). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** ISSI (Integrated Silicon Solution, Inc.)
- **Part Number:** IS42S32400D-7BL
- **Type:** Synchronous DRAM (SDRAM)
- **Density:** 128Mb (4M x 32-bit)
- **Organization:** 4 Banks x 1,048,576 words x 32 bits
- **Voltage Supply:** 3.3V ± 0.3V
- **Speed Grade:** -7 (143 MHz clock frequency)
- **Access Time:** 7 ns (CL=3)
- **Refresh Mode:** Auto-refresh and self-refresh
- **Refresh Cycles:** 4,096 refresh cycles every 64 ms
- **Operating Temperature Range:** Commercial (0°C to +70°C) or Industrial (-40°C to +85°C)
- **Package:** 90-ball BGA (Ball Grid Array)
- **Interface:** LVTTL
### **Descriptions:**
- The IS42S32400D-7BL is a high-speed CMOS SDRAM designed for applications requiring high bandwidth and low power consumption.
- It supports fully synchronous operation with a single 3.3V power supply.
- The device features programmable burst lengths (1, 2, 4, 8, or full page) and supports sequential or interleaved burst modes.
- It includes an auto-precharge function and a power-down mode for reduced standby power consumption.
### **Features:**
- **High-Speed Performance:** 143 MHz clock frequency (7 ns clock cycle time).
- **Low Power Consumption:** Auto and self-refresh modes for power savings.
- **Programmable Burst Length:** Supports 1, 2, 4, 8, or full-page bursts.
- **CAS Latency Options:** Programmable CAS latency (CL=2 or 3).
- **Burst Read and Write Operations:** Sequential or interleaved burst modes.
- **Auto-Precharge:** Supports auto-precharge for efficient memory management.
- **Industrial-Grade Option:** Available with extended temperature range (-40°C to +85°C).
This information is based on the manufacturer's datasheet and technical documentation.
