HANBit

HMN88D

URL : www.hbe.co.kr

1

HANBit Electronics Co.,Ltd

Rev. 0.0 (April, 2002)

GENERAL DESCRIPTION

The HMN88D Nonvolatile SRAM is a 65,536-bit static RAM organized as 8,192 bytes by 8 bits.

The HMN88D 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

the SRAM is unconditionally write-protected to prevent an inadvertent write operation. At this time the integral energy

The HMN88D 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

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Access time : 85, 100, 120, 150 ns

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High-density design : 64Kbit Design

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Battery internally isolated until power is applied

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Industry-standard 28-pin 8K x 8 pinout

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Unlimited writes cycles

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10-years minimum data retention in absence of power

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Automatic write-protection during power-up/power-down

cycles

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Data is automatically protected during power loss

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Commercial temperature operation

OPTIONS

MARKING

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Timing

85 ns

- 85

100 ns

-100

120 ns

-120

150 ns

-150

Non-Volatile SRAM MODULE 64Kbit (8K x 8-Bit),28Pin DIP, 5V

Part No. HMN88D

PIN ASSIGNMENT

1

28

12

17

14

15

10

19

11

18

13

16

2

27

3

26

4

25

6

23

9

20

7

22

5

24

8

21

NC

NC

/CE

/WE

/OE

28-pin Encapsulated Package