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Datasheet Microchip MCP7940N

The MCP7940N series of low-power Real-Time Clocks (RTC) 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

Datasheets

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  MCP7940N Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover
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  MCP7940N
  Battery-Backed I2Cв„ў Real-Time Clock/Calendar with SRAM
  Timekeeping Features: Operating Ranges: Real-Time Clock/Calendar (RTCC):
  -Hours, Minutes, Seconds, Day of Week, Day,
  Month, Year
  -Leap year compensated to 2399
  -12/24 hour modes Oscillator for 32.768 kHz Crystals:
  -Optimized for 6-9 pF crystals On-Chip Digital Trimming/Calibration:
  -В±1 PPM resolution
  -В±129 PPM range Dual Programmable Alarms Versatile Output Pin:
  -Clock output with selectable frequency
  -Alarm output
  -General purpose output Power-Fail Time-Stamp:
  -Time logged on switchover to and from
  Battery mode 2-Wire Serial Interface, I2Cв„ў Compatible
  -I2C clock rate up to 400 kHz Temperature Range:
  -Industrial (I): -40В°C to +85В°C
  -Extended (E): -40В°C to +125В°C Low-Power Features: Wide Voltage Range:
  -Operating voltage range of 1.8V to 5.5V
  -Backup voltage range of 1.3V to 5.5V Low Typical Timekeeping Current:
  -Operating from VCC: 1.2 ВµA at 3.3V
  -Operating from battery backup: 925 nA at
  3.0V Automatic Switchover to Battery Backup User Memory: 64-byte Battery-Backed SRAM Packages: 8-Lead SOIC, MSOP, TSSOP, PDIP and 2x3 ...

Цены

Статус

Корпус / Упаковка / Маркировка

Параметры

	MCP7940N-E/MS	MCP7940N-E/SN	MCP7940N-I/MS	MCP7940N-I/P	MCP7940N-I/SN	MCP7940N-I/ST	MCP7940NT-E/MS	MCP7940NT-E/SN	MCP7940NT-E/SNVAO	MCP7940NT-I/MNY	MCP7940NT-I/MS	MCP7940NT-I/SN	MCP7940NT-I/ST
Alarms	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)	2 Alarms (1 sec)
Digital_Trimming	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)	-127 to +127ppm (1 ppm steps)
Ibat Current, нА	700	700	700	700	700	700	700	700	700	700	700	700	700
Interface	I²C™	I²C™	I²C™	I²C™	I²C™	I²C™	I²C™	I²C™	I²C™	I²C™	I²C™	I²C™	I²C™
Рабочий диапазон температур, °C	от -40 до +125	от -40 до +125	от -40 до +85	от -40 до +85	от -40 до +85	от -40 до +85	от -40 до +125	от -40 до +125		от -40 до +85	от -40 до +85	от -40 до +85	от -40 до +85
Outputs	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK	IRQ/CLK
Power-Fail Timestamp	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore	VCC Fail and VCC Restore
Temperature Range	-40 to +125	-40 to +125	-40 to +125	-40 to +125	-40 to +125	-40 to +125	-40 to +125	-40 to +125	-40 to +125	-40 to +125	-40 to +125	-40 to +125	-40 to +125
Unique ID, MAC_Address	None	None	None	None	None	None	None	None	None	None	None	None	None
User SRAM, Bytes	64	64	64	64	64	64	64	64	64	64	64	64	64
Vbat Range, В	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5	1.3 - 5.5
Vcc Range, В	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5	1.8 - 5.5

Экологический статус

Модельный ряд

• MCP7940N-E/MS MCP7940N-E/SN MCP7940N-I/MS MCP7940N-I/P MCP7940N-I/SN MCP7940N-I/ST MCP7940NT-E/MS MCP7940NT-E/SN MCP7940NT-E/SNVAO MCP7940NT-I/MNY MCP7940NT-I/MS MCP7940NT-I/SN MCP7940NT-I/ST

Классификация производителя

• Clock and Timing > Real-Time Clock > RTCC

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