M41ST87WMX6TR

M41ST87WMX6TR

M41ST87WSS6F

Active

5.0 V, 3.3/3.0 V secure real-time clock , NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM

Quantity $ per Unit Savings
1 - 9$8.140%
10 - 24$7.3610%
25 - 99$7.0214%
100 - 249$6.1025%
250 - 499$5.8228%
500$5.3135%
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Out of stock
$8.14
Parameter NameParameter Value
Operating RangeIndustrial
Supply Voltage Min Volt2.7
Supply Voltage Max Volt3.6
Operating Temp Min Celsius-40.0
Operating Temp Max Celsius85.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
GradeIndustrial
Package NameSSOP 20 7.2x5.3
Key features
  • 5.0, 3.3, or 3.0 V operation
  • 400 kHz I2C bus
  • NVRAM supervisor to non-volatize external LPSRAM
  • 2.5 to 5.5 V oscillator operating voltage
  • Automatic switchover and deselect circuitry
  • Choice of power-fail deselect voltages
    • M41ST87Y: (not recommended for new design, contact ST sales office for availability) THS = 1: VPFD≈ 4.63 V; VCC= 4.75 to 5.5 V THS = 0: VPFD≈ 4.37 V; VCC= 4.5 to 5.5 V
    • M41ST87W: THS = 1: VPFD≈ 2.9 V; VCC= 3.0 to 3.6 V THS = 0: VPFD≈ 2.63 V; VCC= 2.7 to 3.6 V
  • Two independent power-fail comparators (1.25 V reference)
  • Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
  • 128 bytes of clearable, general purpose NVRAM
  • Programmable alarm and interrupt function (valid even during battery backup mode)
  • Programmable watchdog timer
  • Unique electronic serial number (8-byte)
  • 32 kHz frequency output available upon power-on
  • Microprocessor power-on reset output
  • Battery low flag
  • Ultra-low battery supply current of 500 nA (typ)
  • Security features
    • Tamper indication circuits with timestamp and RAM clear
    • LPSRAM clear function (TPCLR)
    • Packaging includes a 28-lead, embedded crystal SOIC and a 20-lead SSOP
    • Oscillator stop detection