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Hanbit Electronics - TIMEKEEPER NVSRAM

Numéro de référence HMNR88D
Description TIMEKEEPER NVSRAM
Fabricant Hanbit Electronics 
Logo Hanbit Electronics 





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HMNR88D fiche technique
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HANBit
HMNR88D(V)
5.0 or 3.3V, 64K bit (8 Kbit x 8) TIMEKEEPER NVSRAM
Part No. HMNR88D(V)
GENERAL DESCRIPTION
The HMNR88D(V) TIMEKEEPER SRAM is a 8Kbit x 8 non-volatile static RAM and real time clock organized as 8,192
words by 8 bits. The special DIP package provides a fully integrated battery back-up memory and real time clock solution.
The HMNR88D(V) directly replaces industry standard 8Kbit x 8 SRAMs. It also provides the non-volatility of Flash without
any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed.
FEATURES
INTEGRATED LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY and
CRYSTAL
BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES, and SECONDS
AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION VOLTAGES :
(VPFD = Power-fail Deselect Voltage)
HMNR88D(V) : VCC = 4.5 to 5.5V
4.2V VPFD 4.5V
HMNR88D(V)V: VCC = 3.0 to 3.6V
2.7V VPFD 3.0V
CONVENTIONAL SRAM OPERATION : UNLIMITED WRITE CYCLES
SOFTWARE CONTROLLED CLOCK CALIBRATION FOR HIGH ACCURACY APPLICATIONS
10 YEARS OF DATA RETENTION and CLOCK OPERATION IN THE ABSENCE OF POWER PIN and FUNCTION
COMPATIBLE WITH INDUSTRY STANDARD 8K x 8 SRAMS
SELF-CONTAINED BATTERY and CRYSTAL IN DIP PACKAGE
OPTIONS
w Timing
70 ns
85 ns
MARKING
-70
-85
PIN ASSIGNMENT
/RST
NCA12
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
28 VCC
27 /WE
26 NC
25 A8
24 A9
23 A11
22 /OE
21 A10
20 /CE
19 DQ7
18 DQ6
17 DQ5
16 DQ4
15 DQ3
28-pin Encapsulated Package
URL : www.hbe.co.kr
Rev. 1.0 (April, 2002)
1 HANBit Electronics Co.,Ltd.

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