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M48T251Y

Features: 5.0V OR 3.3V OPERATING VOLTAGE REAL TIME CLOCK KEEPS TRACK OF TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAYS, DATE OF THE MONTH, MONTHS, AND YEARS AUTOMATIC LEAP YEAR CORRECTION VALID UP TO THE YEAR 2100 AUTOMATIC SWITCH-OVER AND DESELECT CIRCUITRY CHOICE OF POWER-FAIL DESE...

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SeekIC No. : 004405370 Detail

M48T251Y: Features: 5.0V OR 3.3V OPERATING VOLTAGE REAL TIME CLOCK KEEPS TRACK OF TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAYS, DATE OF THE MONTH, MONTHS, AND YEARS AUTOMATIC LEAP YEAR CORRECT...

M48T251Y Data Sheet

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Part Number:
M48T251Y
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/27

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Product Details

Description



Features:

5.0V OR 3.3V OPERATING VOLTAGE
REAL TIME CLOCK KEEPS TRACK OF TENTHS/HUNDREDTHS OF SECONDS, SECONDS, MINUTES, HOURS, DAYS, DATE OF THE MONTH, MONTHS, AND YEARS
AUTOMATIC LEAP YEAR CORRECTION VALID UP TO THE YEAR 2100
AUTOMATIC SWITCH-OVER AND DESELECT CIRCUITRY
CHOICE OF POWER-FAIL DESELECT VOLTAGES: (VPFD = Power-fail Deselect Voltage):
    M48T251Y: 4.25V VPFD 4.50V
    M48T251V: 2.80V VPFD 2.97V
FULL 10% VCC OPERATING RANGE
OVER 10 YEARS' DATA RETENTION IN THE ABSENCE OF POWER
WATCH FUNCTION IS TRANSPARENT TO RAM OPERATION
512K x 8 NV SRAM DIRECTLY REPLACES VOLATILE STATIC RAM OR EEPROM


Pinout

Connection Diagram


Specifications

Symbol
Parameter
Value
Unit
TA
 Ambient Operating Temperature
0 to 70
°C
TSTG
 Storage Temperature (VCC Off, Oscillator Off)
40 to 85
°C
TSLD(1)
 Lead Solder Temperature for 10 seconds
260
°C
VCC
 Supply Voltage M48T252Y
0.3 to 7.0
V
M48T251V
0.3 to 4.6
V
VIO
 Input or Output Voltages
0.3 to VCC +0.3
V
IO
 Output Current
20
mA
PD
 Power Dissipation
1
W



Description

The M48T251Y/V TIMEKEEPER® RAM is a 512Kbit x 8 non-volatile static RAM and real time clock organized as 524,288 words by 8 bits. The special DIP package provides a fully integrated battery back-up memory and real time clock solution. In the event of power instability or absence, a self-contained battery maintains the timekeeping operation and provides power for a CMOS static RAM. Control circuitry monitors VCC and invokes write protection to prevent data corruption in the memory and RTC.

The clock of  M48T251Y/V keeps track of tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, and year information. The last day of the month is automatically adjusted for months with less than 31 days, including leap year correction. The clock operates in one of two formats: a 12-hour mode with an AM/PM indicator; or a 24-hour mode

The M48T251Y/V is a 32-pin (PM) DIP module that integrates the RTC, the battery, and SRAM in one package.

The modules are shipped in plastic, anti-static tubes (see Table 14., page 22).




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