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HMN4M8DV

Hanbit Electronics
Part Number HMN4M8DV
Manufacturer Hanbit Electronics
Description Non-Volatile SRAM MODULE 32Mbit
Published Jan 2, 2007
Detailed Description www.DataSheet4U.com HANBit HMN4M8DV(N) Non-Volatile SRAM MODULE 32Mbit (4,096K x 8-Bit), 40Pin-DIP, 3.3V Part No. HMN...
Datasheet PDF File HMN4M8DV PDF File

HMN4M8DV
HMN4M8DV


Overview
www.
DataSheet4U.
com HANBit HMN4M8DV(N) Non-Volatile SRAM MODULE 32Mbit (4,096K x 8-Bit), 40Pin-DIP, 3.
3V Part No.
HMN4M8DV(N) GENERAL DESCRIPTION The HMN4M8DV Nonvolatile SRAM is a 33,554,432-bit static RAM organized as 4,194,304 bytes by 8 bits.
The HMN4M8DV 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 3.
3V supply for an out-oftolerance 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 t he memory until after V CC returns valid.
The HMN4M8DV 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 : 55, 70ns w High-density design : 32Mbit Design w Battery internally isolated until power is applied w Industry-standard 40-pin 4,096K x 8 pinout w Unlimited write cycles w Data retention in the absence of VCC w 5-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 PIN ASSIGNMENT A21 A20 A18 A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 VCC A19 NC A15 A17 /WE A13 A8 A9 A11 /OE A10 /CE DQ7 DQ6 DQ5 DQ4 DQ3 NC A21 A20 A18 A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 NC VCC A19 NC A15 A...


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