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HYB18T512400BF Datasheet, PDF (3/57 Pages) Qimonda AG – 512-Mbit Double-Data-Rate-Two SDRAM | |||
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HYB18T512xxxBFâ[2.5â¦5]
512-Mbit Double-Data-Rate-Two SDRAM
1
Overview
This chapter gives an overview of the 512-Mbit Double-Data-Rate-Two SDRAM product family and describes its
main characteristics.
1.1
Features
The 512-Mbit Double-Data-Rate-Two SDRAM offers the following key features:
⢠1.8 V ± 0.1 V Power Supply
1.8 V ± 0.1 V (SSTL_18) compatible I/O
⢠DRAM organizations with 4, 8 and 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 and 6
⢠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 TCASE lower
than 85 °C, 3.9 µs between 85 °C and 95 °C
⢠Programmable self refresh rate via EMRS2 setting
⢠Programmable partial array refresh via EMRS2
settings
⢠DCC enabling via EMRS2 setting
⢠Full and reduced Strength Data-Output Drivers
⢠1kB page size for Ã4 & Ã8, 2kB page size for Ã16
⢠Packages: P-TFBGA-60 for Ã4 & Ã8 components P-
TFBGA-84 for Ã16 components
⢠RoHS Compliant Products1)
⢠All Speed grades faster than DDR400 comply with
DDR400 timing specifications when run at a clock
rate of 200 MHz.
A list of the performance tables for the various speeds can be found below
⢠Table 1 âPerformance for DDR2â800â on Page 4
⢠Table 2 âPerformance for DDR2â667â on Page 4
⢠Table 3 âPerformance for DDR2â533Câ on Page 4
⢠Table 4 âPerformance for DDR2â400Bâ on Page 5
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.
Internet Data Sheet
3
Rev. 1.05, 2007-01
03292006-YBYM-WG0Z
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