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參數資料
| 型號： | HMD2564Z1-6 |
| 廠商： | Hanbit Electronics Co.,Ltd. |
| 英文描述： | 1Mbit(256x4bit) Fast Page Mode, 1K Refresh, 20Pin ZIP, 5V Design |
| 中文描述： | 為1Mbit（256x4bit）快速頁面模式，每1000刷新，20針郵編，5V的設計 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 189K |
| 代理商： | HMD2564Z1-6 |
HANBit HMD2564Z1
HANBit Electronics Co.,Ltd.
1
PIN ASSIGNMENT
DESCRIPTION
The HMD2564Z1 is an 256K x 4 bits Fast Page Mode CMOS DRAMs. Fast Page Mode offers high speed random access of
memory cells
within the same row. Power supply voltage (+5V ), access time (-5, -6), power consumption(Normal or Low power), and package
type (ZIP) are optional features of this Module. The HMD2564Z1 have CAS-before-RAS refresh, RAS-only refresh and Hidden
refresh capabilities.
The HMD2564Z1 is optimized for application to the systems, which are required high density and large capacity such as main
memory for main frames and mini computers, personal computer and high performance microprocessor systems.
The HMD2564Z1 provides common data and outputs.
Features
w
Fast Page Mode operation
w
CAS-before-RAS refresh capability
w
RAS-only and Hidden refresh capability
w
Fast parallel test mode capability
w
TTL(5V) compatible inputs and outputs
w
Early write or output enable controlled write
w
Available in 20pin ZIP packages
w
Single +5V
±
10% power supply
w
1,024 Refresh Cycles/16ms
w
Performance Range
PIN DESCRIPTION
PIN
SYMBOL
1
/OE
2
/CAS
3
DQ2
4
DQ3
5
V
SS
6
DQ0
7
DQ1
8
/WE
9
/RAS
10
NC
11
A0
12
A1
13
A2
14
A3
15
V
CC
16
A4
17
A5
18
A6
19
A7
20
A8
Speed
t
RAC
t
CAC
t
RC
t
PC
HMD2564Z1-5
50
15
90
35
HMD2564Z1-6
60
15
110
40
PIN
FUNCTION
PIN
FUNCTION
Read/Write
Enable
A0
–
A9
Address Inputs
/WE
DQ0
–
DQ3
Data
Input/Output
Vcc
Power
(+5V)
/RAS
Row Address
Strobe
Column
Address Strobe
Data Output
Enable
Vss
Ground
/CAS
NC
No
Connection
/OE
1Mbit(256x4bit) Fast Page Mode, 1K Refresh, 20Pin ZIP, 5V Design
Part No. HMD2564Z1
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