Synchronous DRAM. EM488M3244VBB Datasheet

EM488M3244VBB DRAM. Datasheet pdf. Equivalent

Part EM488M3244VBB
Description 256Mb Synchronous DRAM
Feature eorex EM488M3244VBB 256Mb (2M×4Bank×32) Synchronous DRAM Features • Fully Synchronous to Positive.
Manufacture Eorex
Datasheet
Download EM488M3244VBB Datasheet

eorex EM488M3244VBB 256Mb (2M×4Bank×32) Synchronous DRAM EM488M3244VBB Datasheet
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EM488M3244VBB
eorex
EM488M3244VBB
256Mb (2M×4Bank×32) Synchronous DRAM
Features
• Fully Synchronous to Positive Clock Edge
• Single 3.3V ±0.3V Power Supply
• LVTTL Compatible with Multiplexed Address
• Programmable Burst Length (B/L) - 1, 2, 4, 8
or Full Page
• Programmable CAS Latency (C/L) - 2 or 3
• Data Mask (DQM) for Read / Write Masking
• Programmable Wrap Sequence
– Sequential (B/L = 1/2/4/8/full Page)
– Interleave (B/L = 1/2/4/8)
• Burst Read with Single-bit Write Operation
• All Inputs are Sampled at the Rising Edge of
the System Clock
• Auto Refresh and Self Refresh
• 4,096 Refresh Cycles / 64ms (15.625us)
Description
The EM488M3244VBB is Synchronous Dynamic
Random Access Memory (SDRAM) organized as
2Meg words x 4 banks by 32 bits. All inputs and
outputs are synchronized with the positive edge of
the clock.
The 256Mb SDRAM uses synchronized pipelined
architecture to achieve high speed data transfer
rates and is designed to operate at 3.3V low power
memory system. It also provides auto refresh with
power saving / down mode. All inputs and outputs
voltage levels are compatible with LVTTL.
Available packages: TFBGA-90B(13mmx8mm).
Ordering Information
Part No
EM488M3244VBB-75F
EM488M3244VBB-7F
EM488M3244VBB-75FE
EM488M3244VBB-7FE
Organization
8M X 32
8M X 32
8M X 32
8M X 32
Max. Freq
133MHz @CL3
143MHz @CL3
133MHz @CL3
143MHz @CL3
Package
TFBGA-90B
TFBGA-90B
TFBGA-90B
TFBGA-90B
Grade Pb
Commercial Free
Commercial Free
Extend temp. Free
Extend temp. Free
Jul. 2006
* EOREX reserves the right to change products or specification without notice.
1/18
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EM488M3244VBB
eorex
Pin Assignment
EM488M3244VBB
1
DQ26
DQ28
VSSQ
VSSQ
VDDQ
VSS
A4
A7
CLK
DQM1
VDDQ
VSSQ
VSSQ
DQ11
DQ13
2
DQ24
VDDQ
DQ27
DQ29
DQ31
DQM3
A5
A8
CKE
NC
DQ8
DQ10
DQ12
VDDQ
DQ15
3
VSS
VSSQ
DQ25
DQ30
NC
A3
A6
NC
A9
NC
VSS
DQ9
DQ14
VSSQ
VSS
7
A VDD
B VDDQ
C DQ22
D DQ17
E NC
F A2
G A10
H NC
J BA0
K /CAS
L VDD
M DQ6
N DQ1
P VDDQ
R VDD
90ball TFBGA / (13mm x 8mm)
8
DQ23
VSSQ
DQ20
DQ18
DQ16
DQM2
A0
BA1
/CS
/WE
DQ7
DQ5
DQ3
VSSQ
DQ0
9
DQ21
DQ19
VDDQ
VDDQ
VSSQ
VDD
A1
A11
/RAS
DQM0
VSSQ
VDDQ
VDDQ
DQ4
DQ2
Jul. 2006
2/18
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