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HMN1288D-85I Datasheet

  • HMN1288D-85I

  • Non-Volatile SRAM MODULE 1Mbit (128K x 8-Bit), 32Pin-DIP, 5V

  • 171.38KB

  • 9頁

  • ETC

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HANBit
HMN1288D
Non-Volatile SRAM MODULE 1Mbit (128K x 8-Bit), 32Pin-DIP, 5V
Part No. HMN1288D
GENERAL DESCRIPTION
The HMN1288D Nonvolatile SRAM is a 1,048,576-bit static RAM organized as 131,072 bytes by 8 bits.
The HMN1288D has a self-contained lithium energy source provide reliable non-volatility coupled with the unlimited write
cycles of standard SRAM and integral control circuitry, which constantly monitors the single 5V, supply for an out-of-
tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on to sustain the
memory until after V
CC
returns valid and write protection is unconditionally enabled to prevent garbled data. In addition the
SRAM is unconditionally write-protected to prevent an inadvertent write operation. At this time the integral energy source is
switched on to sustain the memory until after V
CC
returns valid.
The HMN1288D uses extremely low standby current CMOS SRAM鈥檚, coupled with small lithium coin cells to provide non-
volatility without long write-cycle times and the write-cycle limitations associated with EEPROM.
FEATURES
w
Access time : 70, 85, 120, 150 ns
w
High-density design : 1Mbit Design
w
Battery internally isolated until power is applied
w
Industry-standard 32-pin 128K x 8 pinout
w
Unlimited write cycles
w
Data retention in the absence of V
CC
w
10-years minimum data retention in absence of power
w
Automatic write-protection during power-up/power-down
cycles
w
Data is automatically protected during power loss
w
Conventional SRAM operation; unlimited write cycles
NC
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
V
CC
A
15
NC
/WE
A
13
A
8
A
9
A
11
/OE
A
10
/CE
DQ
7
DQ
6
DQ
5
DQ
4
DQ
3
A
16
A
14
A
12
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
DQ
0
DQ
1
DQ
2
V
SS
OPTIONS
w
Timing
70 ns
85 ns
120 ns
150 ns
MARKING
- 70
- 85
-120
-150
32-pin Encapsulated Package
URL : www.hbe.co.kr
Rev. 1.0 (June, 2002)
1
HANBit Electronics Co.,Ltd

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