HYB18T1G[40/80/16]0AF(L)–[3S/3.7/5]
1-Gbit DDR2 SDRAM
Overview
1
Overview
This chapter gives an overview of the 1-Gbit DDR2 SDRAM product family and describes its main characteristics.
1.1
Features
The 1-Gbit DDR2 SDRAM offers the following key features:
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•
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1.8 V ± 0.1 V Power Supply
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Data masks (DM) for write data
1.8 V ± 0.1 V (SSTL_18) compatible I/O
DRAM organisations with 4, 8 and 16 data
in/outputs
Double Data Rate architecture: two data transfers
per clock cycle, eight internal banks for concurrent
operation
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
High Temperature Self Refresh Mode is supported
Normal and Weak and reduced Strength Data-
Output Drivers
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•
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•
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CAS Latency: 3, 4 and 5
Burst Length: 4 and 8
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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
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1 KByte page size
Lead-free Packages:
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P-TFBGA-68 for ×4 & ×8 components, P-TFBGA-
92 for ×16 components
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Commands entered on each positive clock edge,
data and data mask are referenced to both edges of
DQS
•
RoHS Compliant Products1)
Table 1
Performance table for DDR2–667D
Product Type Speed Code
Speed Grade
–3S
Unit
DDR2–667D 5–5–5
—
Max. Clock Frequency
@CL5
@CL4
@CL3
fCK5
fCK4
fCK3
tRCD
tRP
333
266
200
15
MHz
MHz
MHz
ns
Min. RAS-CAS-Delay
Min. Row Precharge Time
Min. Row Active Time
Min. Row Cycle Time
15
ns
tRAS
tRC
45
ns
60
ns
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. 1.31, 2007-01
03292006-1X3H-6X8S
QIMONDA [ QIMONDA AG ]
