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MCP79401-I/MS, Real Time Clock I2C GP RTCC 64B SRAM EUI-48
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MCP79401-I/MS, Real Time Clock I2C GP RTCC 64B SRAM EUI-48

Semiconductors\Clock & Timer ICs\Real Time ClockMCP7940N Real-Time Clock/Calendar (RTCC) Microchip Technology MCP7940N Real-Time Clock/Calendar (RTCC) uses digital timing compensation for an accurate clock/calendar, a programmable output control for versatility, and a power sense circuit that automatically switches to the backup supply. Using a low-cost 32.768kHz crystal, it tracks time using several internal registers. For communication, the MCP7940N uses the I 2 C bus. The clock/calendar automatically adjusts for months with fewer than 31 days, including corrections for leap years. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator and settable alarm(s) to the second, minute, hour, or day of the week, date, or month. Using the programmable CLKOUT, frequencies of 32.768kHz, 8.192kHz and 4.096kHz and 1Hz can be generated from the external crystal. The device is fully accessible through the serial interface while V CC is between 1.8V and 5.5V, but can operate down to 1.3V for timekeeping and SRAM retention only.
Battery Backup Switching Backup Switching
Brand Microchip Technology
Date Format YY-MM-DD-dd
Factory Pack Quantity: Factory Pack Quantity 100
Function Battery Switchover, Calendar, Clock, Unique ID
Manufacturer Microchip
Maximum Operating Temperature +85 C
Minimum Operating Temperature -40 C
Moisture Sensitive Yes
Mounting Style SMD/SMT
Package / Case MSOP-8
Packaging Tube
Product Category Real Time Clock
Product Type Real Time Clocks
RTC Bus Interface I2C, Serial
RTC Memory Size 64 B
Subcategory Clock & Timer ICs
Supply Voltage - Max 5.5 V
Supply Voltage - Min 1.8 V
Time Format HH:MM:SS(12 hr, 24 hr)
Automotive Yes
Bus Type Serial(2-Wire, I2C)
Date Format DW:DM:M:Y
ECCN (US) EAR99
EU RoHS Compliant
Function Clock/Calendar/Alarm/Battery Backup
Lead Shape Gull-wing
Maximum Operating Supply Voltage (V) 5.5
Maximum Operating Temperature (°C) 85
Minimum Operating Supply Voltage (V) 1.8
Minimum Operating Temperature (°C) -40
Mounting Surface Mount
Part Status Active
PCB changed 8
Pin Count 8
PPAP Yes
Supplier Package MSOP
Supplier Temperature Grade Industrial
Time Format HH:MM:SS
Typical Operating Supply Voltage (V) 2.5|3.3|5
User RAM (byte) 64
Factory Pack Quantity 100
Product Real Time Clocks
RoHS Details
RTC Bus Interface Serial, I2C
Unit Weight 0.004938 oz
Case MSOP8
Clock format HH:MM:SS(12/24h)
DC supply current 3mA
Frequency 400kHz
Integrated circuit features EUI-48
Interface I2C
Kind of memory SRAM
Memory 64B SRAM
Output voltage -0.6…6.5V
Time keeping current 700nA
Type of integrated circuit RTC circuit
Вес, г 0.14

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