MCP79401-ISLASHMS datasheet(1/62 Pages) MICROCHIP

部件名	MCP79401-I/MS

功能描述	Battery-Backed I2C Real-Time Clock/Calendar with SRAM and Protected EEPROM

PDF	62 Pages

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制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

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 2011-2016 Microchip Technology Inc.

DS20005009F-page 1

MCP79400/MCP79401/MCP79402

Device Selection Table

Timekeeping Features

• 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:

- ±1 ppm resolution

- ±129 ppm

• 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

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 µA at 3.3V

- Operating from battery backup: 925 nA at

3.0V

• Automatic Switchover to Battery Backup

User Memory

• 64-Byte Battery-Backed SRAM

• 64-Bit Protected EEPROM Area:

- Robust write unlock sequence

-EUI-48™ MAC address (MCP79401)

-EUI-64™ MAC address (MCP79402)

- Custom programming available

Operating Ranges

• 2-Wire Serial Interface, I2C Compatible:

-I2C clock rate up to 400 kHz

• Temperature Range:

- Industrial (I): -40°C to +85°C

Packages

• 8-Lead SOIC, MSOP, TSSOP and 2x3 TDFN

General Description

The MCP7940X Real-Time Clock/Calendar (RTCC)

tracks time using internal counters for hours, minutes,

seconds, days, months, years, and day of week.

Alarms can be configured on all counters up to and

including months. For usage and configuration, the

MCP7940X supports I2C communications up to

400 kHz.

The open-drain, multi-functional output can be

configured to assert on an alarm match, to output a

selectable frequency square wave or as a general

purpose output.

The MCP7940X is designed to operate using a

32.768 kHz tuning fork crystal with external crystal

load capacitors. On-chip digital trimming can be used

to adjust for frequency variance caused by crystal

tolerance and temperature.

SRAM and timekeeping circuitry are powered from the

back-up supply when main power is lost, allowing the

device to maintain accurate time and the SRAM

contents. The times when the device switches over to

the back-up supply and when primary power returns

are both logged by the power-fail time-stamp.

The MCP7940X features 64 bits of EEPROM which is

only writable after an unlock sequence, making it ideal

for storing a unique ID or other critical information. The

MCP79401 and MCP79402 are pre-programmed with

EUI-48 and EUI-64 addresses, respectively. Custom

programming is also available.

Package Types

Part Number

Protected EEPROM

MCP79400

Unprogrammed

MCP79401

EUI-48™

MCP79402

EUI-64™

SOIC, TSSOP, MSOP

X1

X2

VBAT

VSS

1

2

3

4

8

7

6

5

VCC

MFP

SCL

SDA

TDFN

X1

X2

VSS

MFP

SDA

VCC

8

7

5

1

2

4

VBAT 3SCL

6

Battery-Backed I

2C Real-Time Clock/Calendar with

SRAM and Protected EEPROM

类似零件编号 - MCP79401-I/MS

制造商	部件名	数据表	功能描述
Microchip Technology	MCP79401	574Kb / 38P	I2C??Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover 2011
	MCP79401	1Mb / 42P	I2C Real-Time Clock/Calendar with SRAM, Unique IDand Battery Switchover 11/29/11
	MCP79401	1Mb / 42P	I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover 11/29/11

More results

类似说明 - MCP79401-I/MS

制造商	部件名	数据表	功能描述
Intersil Corporation	ISL12028	584Kb / 29P	Real Time Clock/Calendar with I2C Bus??and EEPROM August 9, 2010
Intersil Corporation	ISL12026	560Kb / 24P	Real Time Clock/Calendar with I2C Bus??and EEPROM November 30, 2010
Microchip Technology	MCP79410	580Kb / 38P	I2C??Real-Time Clock/Calendar with EEPROM, SRAM, Unique ID and Battery Switchover 2011
Intersil Corporation	ISL12028_1011	586Kb / 29P	Real Time Clock/Calendar with I2C Bus??and EEPROM November 30, 2010
Microchip Technology	MCP79410	1Mb / 60P	Battery-Backed I2C??Real-Time Clock/Calendar with EEPROM and Unique ID 11/29/12 2010-2013
Renesas Technology Corp	ISL1208	1,010Kb / 24P	I2C Real Time Clock/Calendar, Low Power RTC with Battery Backed SRAM
Renesas Technology Corp	ISL12026	1,002Kb / 24P	Real Time Clock/Calendar with I2C Bus??and EEPROM
Microchip Technology	MCP7940N	727Kb / 58P	Battery-Backed I2C Real-Time Clock/Calendar with SRAM 09/14/21
Microchip Technology	MCP7951X	899Kb / 58P	Battery-Backed SPI Real-Time Clock/Calendar 09/14/21
Renesas Technology Corp	ISL1208	1Mb / 25P	I2C Real Time Clock/Calendar, Low Power RTC with Battery Backed SRAM Jul 15, 2022