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Numéro de référence | HMNR88D | ||
Description | TIMEKEEPER NVSRAM | ||
Fabricant | Hanbit Electronics | ||
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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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Pages | Pages 13 | ||
Télécharger | [ HMNR88D ] |
No | Description détaillée | Fabricant |
HMNR88D | TIMEKEEPER NVSRAM | Hanbit Electronics |
HMNR88DV | TIMEKEEPER NVSRAM | Hanbit Electronics |
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