HYB18T1G[40/80/16]0AF(L)–[3S/3.7/5]
1-Gbit DDR2 SDRAM
Overview
Table 2
High Performance for DDR2–400B and DDR2–533C
Product Type Speed Code
Speed Grade
–3.7
–5
Unit
—
DDR2–533C 4–4–4
DDR2–400B 3–3–3
max. Clock Frequency
@CL5
@CL4
@CL3
fCK5
fCK4
fCK3
266
266
200
200
200
200
15
MHz
MHz
MHz
ns
min. RAS-CAS-Delay
min. Row Precharge Time
min. Row Active Time
min. Row Cycle Time
tRCD 15
tRP 15
tRAS 45
tRC 60
15
ns
40
ns
55
ns
1.2
Description
All of the control and address inputs are synchronized
with a pair of externally supplied differential clocks.
Inputs are latched at the cross point of differential
clocks (CK rising and CK falling). All I/Os are
synchronized with a single ended DQS or differential
DQS-DQS pair in a source synchronous fashion.
The 1-Gbit DDR2 DRAM is a high-speed Double-Data-
Rate-Two CMOS Synchronous DRAM device
containing 1,073,741,824 bits and internally configured
as an octal-bank DRAM. The 1-Gbit device is
organized as either 32 Mbit × 4 I/O × 8 banks, 16 Mbit
× 8 I/O × 8 banks or 8 Mbit × 16 I/O × 8 banks chip. A 17 bit address bus for ×4 and ×8 organised
These synchronous devices achieve high speed data components and a 16 bit address bus for ×16
transfer rates starting at 400 Mbit/sec/pin for general components is used to convey row, column and bank
applications. See Table 3 for performance figures.
address information in a RAS-CAS multiplexing style.
The device is designed to comply with all DDR2 DRAM The DDR2 device operates with an 1.8 V ± 0.1 V power
key features:
supply. An Auto-Refresh and Self-Refresh mode is
provided along with various power-saving power-down
modes.
1. Posted CAS with additive latency,
The functionality described and the timing
specifications included in this data sheet are for the
DLL Enabled mode of operation.
2. Write latency = read latency - 1,
3. Normal and weak strength data-output driver,
4. Off-Chip Driver (OCD) impedance adjustment
5. On-Die Termination (ODT) function.
The DDR2 SDRAM is available in P-TFBGA package.
Internet Data Sheet
4
Rev. 1.31, 2007-01
03292006-1X3H-6X8S
QIMONDA [ QIMONDA AG ]
