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HMNR88DV

Hanbit Electronics
Part Number HMNR88DV
Manufacturer Hanbit Electronics
Description TIMEKEEPER NVSRAM
Published Jan 2, 2007
Detailed Description www.DataSheet4U.com HANBit HMNR88D(V) 5.0 or 3.3V, 64K bit (8 Kbit x 8) TIMEKEEPER NVSRAM Part No. HMNR88D(V) GENERAL...
Datasheet PDF File HMNR88DV PDF File

HMNR88DV
HMNR88DV

Overview
www.
DataSheet4U.
com 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 NC 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 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC /WE NC A8 A9 A11 /OE A10 /CE DQ7 DQ6 DQ5 DQ4 DQ3 28-pin Encapsulated Package URL : www.
hbe.
co.
kr Rev.
1.
0 (April, 2002) 1 HANBit Electronics Co.
,Ltd.
HANBit FUNCTIONAL DESCRIPTION HMNR88D(V) The HMNR88D(V) is a full function, year 2000 compliant (Y2KC), real– time clock/calendar (RTC) and 8k x 8 non-volatile static RAM.
User access to all registers within the HMNR88D(V) is accomplished with a bytewide interface .
The Real-time clock (RTC) information and control bits reside in the sixteen upper most RAM locations...


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