DDR SDRAM Components The part **HYB25D256400BT-7** is manufactured by **INFINEON** (formerly Qimonda). Below are the specifications, descriptions, and features based on factual information:
### **Specifications:**
- **Memory Type:** DDR2 SDRAM
- **Density:** 256Mb (32M x 8)
- **Speed Grade:** -7 (143 MHz / 7 ns cycle time)
- **Voltage:** 1.8V ± 0.1V
- **Organization:** 32M words × 8 bits
- **Package:** FBGA (Fine-Pitch Ball Grid Array)
- **Operating Temperature:** Commercial (0°C to +70°C) or Industrial (-40°C to +85°C) depending on variant
- **Refresh Rate:** 64ms, 8K refresh cycles
- **Burst Length:** 4 or 8 (programmable)
- **CAS Latency (CL):** 3, 4, or 5 (programmable)
### **Descriptions:**
- A high-performance **DDR2 SDRAM** chip designed for computing and embedded applications.
- Supports **Double Data Rate (DDR)** architecture for faster data transfer.
- Features **On-Die Termination (ODT)** for improved signal integrity.
- Compliant with **JEDEC DDR2 standards**.
### **Features:**
- **Low Power Consumption:** 1.8V operation reduces power usage.
- **High-Speed Data Transfer:** Up to **533 Mbps/pin** (DDR2-533).
- **Programmable CAS Latency:** Supports CL3, CL4, and CL5.
- **Differential Clock Inputs (CK/CK#):** Enhances timing accuracy.
- **4-Bank Architecture:** Improves memory efficiency.
- **Auto Precharge & Self-Refresh Modes:** Optimizes power management.
- **FBGA Packaging:** Compact and suitable for space-constrained designs.
This information is strictly based on manufacturer datasheets and industry-standard specifications.
