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4-bank. HM5425801B Datasheet |
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HM5425161B Series
HM5425801B Series
HM5425401B Series
256M SSTL_2 interface DDR SDRAM
143 MHz/133 MHz/125 MHz/100 MHz
4-Mword × 16-bit × 4-bank/8-Mword × 8-bit × 4-bank/
16-Mword × 4-bit × 4-bank
E0086H20 (Ver. 2.0)
Jan. 23, 2002
Description
The HM5425161B, the HM5425801B and the HM5425401B are the Double Data Rate (DDR) SDRAM
devices. Read and write operations are performed at the cross points of the CLK and the CLK. This high
speed data transfer is realized by the 2-bit prefetch piplined architecture. Data strobe (DQS) both for read and
write are available for high speed and reliable data bus design. By setting extended mode resistor, the on-chip
Delay Locked Loop (DLL) can be set enable or disable.
Features
• 2.5 V power supply
• SSTL-2 interface for all inputs and outputs
• Clock frequency: 143 MHz/133 MHz/125 MHz/100 MHz (max)
• Data inputs, outputs, and DM are synchronized with DQS
• 4 banks can operate simultaneously and independently
• Burst read/write operation
• Programmable burst length: 2/4/8
Burst read stop capability
Elpida Memory, Inc. is a joint venture DRAM company of NEC Corporation and Hitachi, Ltd.
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HM5425161B, HM5425801B, HM5425401B Series
• Programmable burst sequence
Sequential
Interleave
• Start addressing capability
Even and Odd
• Programmable CAS latency: 2/2.5
• 8192 refresh cycles: 7.8 µs (64 ms/8192 cycles)
• 2 variations of refresh
Auto refresh
Self refresh
Ordering Information
Type No.
Frequency
HM5425161BTT-75A*1
HM5425161BTT-75B*2
HM5425161BTT-10*3
133 MHz
133 MHz
100 MHz
HM5425801BTT-75A*1
HM5425801BTT-75B*2
HM5425801BTT-10*3
133 MHz
133 MHz
100 MHz
HM5425401BTT-75A*1
HM5425401BTT-75B*2
HM5425401BTT-10*3
133 MHz
133 MHz
100 MHz
Notes: 1. 143 MHz operation at CAS latency = 2.5.
2. 100 MHz operation at CAS latency = 2.0.
3. 125 MHz operation at CAS latency = 2.5.
CAS latency
2.0
2.5
2.0
2.0
2.5
2.0
2.0
2.5
2.0
Package
400-mill 66-pin plastic
TSOP II
Data Sheet E0086H20
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HM5425161B, HM5425801B, HM5425401B Series
Pin Arrangement (HM5425161B)
66-pin TSOP
VCC
DQ0
VCCQ
DQ1
DQ2
VSSQ
DQ3
DQ4
VCCQ
DQ5
DQ6
VSSQ
DQ7
NC
VCCQ
DQSL
NC
VCC
NC
DML
WE
CAS
RAS
CS
NC
BA0
BA1
A10(AP)
A0
A1
A2
A3
VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
66 VSS
65 DQ15
64 VSSQ
63 DQ14
62 DQ13
61 VCCQ
60 DQ12
59 DQ11
58 VSSQ
57 DQ10
56 DQ9
55 VCCQ
54 DQ8
53 NC
52 VSSQ
51 DQSU
50 NC
49 VREF
48 VSS
47 DMU
46 CLK
45 CLK
44 CKE
43 NC
42 A12
41 A11
40 A9
39 A8
38 A7
37 A6
36 A5
35 A4
34 VSS
(Top view)
Data Sheet E0086H20
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