HYB18T256161BF-20
Overview
This chapter gives an overview of the 256-Mbit Double-Data-Rate-Two SDRAM product family for graphics applications and describes its main characteristics.
Features
The 256-Mbit Double-Data-Rate-Two SDRAM offers the following key features
:
- Data masks (DM) for write data
- 1.8 V ± 0.1V VDD for [- 20/- 25/- 28]
- 1.8 V ± 0.1V VDDQ for [- 20/- 25/- 28]
- Posted CAS by programmable additive latency for better
- DRAM organizations with 16 data in/outputs mand and data bus efficiency
- Double Data Rate architecture:
- Off-Chip-Driver impedance adjustment (OCD) and On- two data transfers per clock cycle Die-Termination (ODT) for better signal quality.
- four internal banks for concurrent operation
- Auto-Precharge operation for read and write bursts
- Programmable CAS Latency: 3, 4, 5, 6, 7
- Auto-Refresh, Self-Refresh and power saving Power Down modes
- Programmable Burst Length: 4 and 8
- Average Refresh Period 7.8 μs at a TCASE lower than 85°C,
- Differential clock inputs (CK...
