Internet Data Sheet

Rev. 1.43, 2006-11

3

03292006-L40N-L04G

HYB18T512161BF–20/22/25/28/33

512-Mbit Double-Data-Rate-Two SDRAM

1Overview

This chapter gives an overview of the 512-Mbit Double-Data-Rate-Two SDRAM product family for graphics application and

describes its main characteristics.

1.1

Features

The 512-Mbit Double-Data-Rate-Two SDRAM offers the following key features:

• 1.8 V

•

2.0 V

• 1.8 V

•

2.0 V

• DRAM organizations with 16 data in/outputs

• Double Data Rate architecture:

– two data transfers per clock cycle

– four internal banks for concurrent operation

• Programmable CAS Latency: 3, 4, 5, 6, 7

• Programmable Burst Length: 4 and 8

• Differential clock inputs (CK and CK)

• Bi-directional, differential data strobes (DQS and DQS) are

transmitted / received with data. Edge aligned with read

data and center-aligned with write data.

• DLL aligns DQ and DQS transitions with clock

•DQS can be disabled for single-ended data strobe

operation

• Commands entered on each positive clock edge, data and

data mask are referenced to both edges of DQS

• Data masks (DM) for write data

• Posted CAS by programmable additive latency for better

command and data bus efficiency

• Off-Chip-Driver impedance adjustment (OCD) and On-

Die-Termination (ODT) for better signal quality.

• Auto-Precharge operation for read and write bursts

• Auto-Refresh, Self-Refresh and power saving Power-

Down modes

• Average Refresh Period 7.8

85 °C, 3.9

µs between 85 °C and 95 °C

• Full Strength and reduced Strength (60%) Data-Output

Drivers

• 2kB page size

• Packages: P-TFBGA-84 for

×16 components

TABLE 1

Ordering Information for RoHS compliant products

1) RoHS Compliant Product: Restriction of the use of certain hazardous substances (RoHS) in electrical and electronic equipment as defined

in the directive 2002/95/EC issued by the European Parliament and of the Council of 27 January 2003. These substances include mercury,

lead, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated biphenyl ethers.

Product Number

Org.

Clock (MHz)

Package

HYB18T512161BF–20/22/25/28/33

×16

500/450/400/350/300

P-TFBGA-84