MCP7940MIMS datasheet(1/38 Pages) MICROCHIP

Teilenummer	MCP7940MIMS

Bauteilbeschribung	Low-Cost I2C??Real-Time Clock/Calendar with SRAM

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 2012 Microchip Technology Inc.

Preliminary

DS22292A-page 1

MCP7940M

Device Selection Table

Features:

• Real-Time Clock/Calendar (RTCC):

- Hours, Minutes, Seconds, Day of Week, Day,

Month and Year

- Dual alarm with single output

• On-Chip Digital Trimming/Calibration:

- Range -127 to +127 ppm

- Resolution 1 ppm

• Programmable Open-Drain Output Control:

- CLKOUT with 4 selectable frequencies

- Alarm output

• 64 Bytes SRAM

• Low-Power CMOS Technology:

- Dynamic Current: 400

A max write

• 100 kHz and 400 kHz Compatibility

• ESD Protection >4,000V

• Packages include 8-Lead SOIC, TSSOP, 2x3

TDFN, MSOP and PDIP

• Pb-Free and RoHS Compliant

• Temperature Ranges:

- Industrial (I): -40°C to +85°C

Description:

The MCP7940M series of low-power Real-Time Clocks

(RTC) uses digital timing compensation for an accurate

clock/calendar and a programmable output control for

versatility. Using a low-cost 32.768 kHz crystal, it tracks

time

using

several

internal

registers.

For

communication, the MCP7940M uses the I2C™ 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, day of

the week, date or month. Using the programmable

CLKOUT, frequencies of 32.768, 8.192 and 4.096

kHz and 1 Hz can be generated from the external

crystal.

The RTC series of devices are available in the standard

8-lead SOIC, TSSOP, MSOP, PDIP and 2x3 TDFN

packages.

Package Types

Part Number

SRAM

(Bytes)

MCP7940M

64

X1

X2

NC

VSS

1

2

3

4

8

7

6

5

VCC

MFP

SCL

SDA

PDIP

X1

X2

NC

VSS

VCC

MFP

SCL

SDA

1

2

3

4

8

7

6

5

MSOP

SOIC, TSSOP

X1

X2

NC

VSS

1

2

3

4

8

7

6

5

VCC

MFP

SCL

SDA

TDFN

X1

X2

NC

VSS

MFP

SCL

SDA

VCC

8

7

6

5

1

2

3

4

Low-Cost I2C™ Real-Time Clock/Calendar with SRAM

Ähnliche Beschreibung - MCP7940MIMS

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Microchip Technology	MCP7940M	1,006Kb / 38P	Low-Cost I2C??Real-Time Clock/Calendar with SRAM 11/29/11
	MCP7940N	562Kb / 36P	Low-Cost I2C??Real-Time Clock/Calendar with SRAM and Battery Switchover 2011
	MCP7940N	1Mb / 42P	Low-Cost I2C??Real-Time Clock/Calendar with SRAM and Battery Switchover 11/29/12
	MCP7940NT-I-MNY	1Mb / 42P	Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover 11/29/12
	MCP7940N	727Kb / 58P	Battery-Backed I2C Real-Time Clock/Calendar with SRAM 09/14/21
Intersil Corporation	ISL1208	393Kb / 21P	I2C Real Time Clock/Calendar
HAOYU MICROELECTRONIC.,...	HYM8563	166Kb / 12P	I2C Real Time Clock/Calendar
Intersil Corporation	ISL12057	298Kb / 17P	Low Cost and Low Power I2C RTC Real Time Clock/Calendar
	ISL12059	196Kb / 11P	Low Cost and Low Power I2C Bus??Real Time Clock/Calendar
	ISL12058	329Kb / 19P	Low Cost and Low Power I2C-Bus??Real Time Clock/Calendar

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