HMN1288D Datasheet, PDF (1/9 Pages) List of Unclassifed Manufacturers – Non-Volatile SRAM MODULE 1Mbit (128K x 8-Bit), 32Pin-DIP, 5V

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’s, 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
OPTIONS
w Timing
70 ns
85 ns
120 ns
150 ns
MARKING
- 70
- 85
-120
-150
PIN ASSIGNMENT
NC ¹
A16
2
A14
3
A12
4
A7
5
A6
6
A5
7
A4
8
A3
9
A2
10
A1
11
A0
12
DQ0
13
DQ1
14
DQ2
15
VSS
16
32
VCC
31
A15
30 _NC
29 _/WE
28
A13
27
A8
26
A9
25
A11
24 _/OE
23
A10
22 _/CE
21
DQ7
20
DQ6
19
DQ5
18
DQ4
17
DQ3
32-pin Encapsulated Package
URL : www.hbe.co.kr
Rev. 1.0 (June, 2002)
1
HANBit Electronics Co.,Ltd