HYB18T256161BF Datasheet, PDF (3/40 Pages) Qimonda AG – 256-Mbit x16 DDR2 SDRAM

Internet Data Sheet
1
Overview
HYB18T256161BF–20/25/28
256-Mbit Double-Data-Rate-Two SDRAM
This chapter gives an overview of the 256-Mbit Double-Data-Rate-Two SDRAM product family for graphics applications and
describes its main characteristics.
1.1
Features
The 256-Mbit Double-Data-Rate-Two SDRAM offers the following key features:
• 1.8 V ± 0.1V V_DD for [–20/–25/–28]
• 1.8 V ± 0.1V V_DDQ for [–20/–25/–28]
• 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 μs at a T_CASE lower than 85°C,
3.9 μs between 85°C and 95°C
• Full Strength and reduced Strength (60%) Data-Output
Drivers
• 1K page size
• Package: P-TFBGA-84
• RoHS Compliant Products¹⁾
Product Number
HYB18T256161BF–20/25/28
TABLE 1
Ordering Information for RoHS compliant products
Org.
Clock (MHz)
Package
× 16
500/400/350
P-TFBGA-84
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.
Rev. 1.20, 2007-06
3
11232006-QP6X-6EM0