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The MCP7940M I2CTM compatible real-time clock/calendar (RTCC) includes SRAM and a digital trimming circuit for accuracy which is normally found in higher priced devices. Using a low-cost 32,768 kHz crystal or other clock source, time is tracked in either a 12-hour or 24-hour format with an AM/PM indicator and timing to the second, minute, hour, day of the week, day, month and year. As an interrupt or wakeup signal, a multifunction open drain output can be programmed as an Alarm Out or as a Clock Out that supports 4 selectable frequencies.
TimekeepingReal-Time Clock/Calendar (RTCC)
Hours, Minutes, Seconds, Day of Week, Day, Month, Year
Leap year compensated to 2399
12/24 hour modes
On-Chip Digital Trimming/Calibration
1 PPM Resolution
±129 PPM Range
Dual Programmable Alarms
Versatile Output Pin
Clock output with selectable frequency
Alarm output
General Purpose output
64 Bytes SRAM
2-Wire Serial Interface, I2C™Compatible
I2C Clock Frequency up to 400 kHz
Low-PowerWide Voltage Range
Operating Voltage 1.8V to 5.5V
Low Typical Timekeeping Current

MCP7940M 封装图

MCP7940M 封装图

MCP7940M 封装图

MCP7940M 封装图

MCP7940M 封装图
| 型号 | 制造商 | 描述 | 购买 |
|---|---|---|---|
| MCP7940M-I/P | Microsemi Corporation | IC FPGA 130 I/O 208PQFP | 立即购买 |
| MCP7940M-I/ST | TE Connectivity Deutsch Connectors | CONN HSG RCPT JAM NUT 55POS SKT | 立即购买 |
| MCP7940M-I/MS | TE Connectivity Deutsch Connectors | CONN HSG RCPT JAM NUT 55POS SKT | 立即购买 |
| MCP7940M-I/SN | Sensata . | CIRBRKRMAG-HYDRLEVER | 立即购买 |
| MCP7940MT-I/ST | ITT Cannon | CB6C3#03#12PINPLUG | 立即购买 |
| MCP7940MT-I/MS | Amphenol Aerospace | CONN HSG PLUG 61POS STRGHT SCKT | 立即购买 |
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