Microchip MCP7940M-I/P, Real Time Clock (RTC), 64B RAM Serial-I2C, 8-Pin PDIP

View all Real Time Clocks

Subtotal (1 tube of 60 units)*

£30.24

(exc. VAT)

£36.30

(inc. VAT)

Add to Basket
Select or type quantity
In Stock
  • 300 unit(s) ready to ship
  • Plus 999,999,660 unit(s) shipping from 27 November 2025
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
Per Tube*
60 +£0.504£30.24

*price indicative

RS Stock No.:
146-0203
Mfr. Part No.:
MCP7940M-I/P
Brand:
Microchip
Find similar products by selecting one or more attributes.
Select all

Brand

Microchip

Functions

Alarm, Calendar

Date Format

DW:DM:M:Y

Time Format

HH:MM:SS

User RAM

64B

Bus Type

Serial-I2C

Mounting Type

Through Hole

Package Type

PDIP

Pin Count

8

Dimensions

10.16 x 7.11 x 4.95mm

Length

10.16mm

Width

7.11mm

Height

4.95mm

Maximum Operating Supply Voltage

5.5 V

Minimum Operating Supply Voltage

1.8 V

Maximum Operating Temperature

+85 °C

Minimum Operating Temperature

-40 °C

COO (Country of Origin):
TH

MCP7940M I²C Real-Time Clock/Calendars


The Microchip MCP7940M is Real-Time Clock Calendar (RTCC) that supports I²C communications. The MCP7940M includes a digital trimming circuit for accuracy which can compensate for crystal tolerance and temperature.

The MCP7940M features a multi-functional output that can be configured as an alarm output, to output a selectable frequency square wave or as a general purpose output.

Features


2-Wire Serial Interface, I²C™ Compatible: I²C clock rate up to 400 kHz
On-Chip Digital Trimming/Calibration: ±1 ppm resolution, ±129 ppm range
Tracks Hours, Minutes, Seconds, Day of Week, Day, Month and Year
Leap Year Compensated to 2399
12/24 Hour Modes
Oscillator for 32.768 kHz Crystals: Optimised for 6-9 pF crystals
Dual Programmable Alarms
Versatile Output Pin
Wide Operating Voltage Range: 1.8V to 5.5V
Low Typical Timekeeping Current: 1.2μA at 3.3V


Real Time Clock Peripherals - Microchip

Related links