MCP79400 datasheet(1/42 Pages) MICROCHIP

部件名	MCP79400

功能描述	I2C Real-Time Clock/Calendar with SRAM, Unique IDand Battery Switchover

PDF	42 Pages

Scroll/Zoom	100%

制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

标志

1 / 42 page

 2011 Microchip Technology Inc.

DS25009C-page 1

MCP79400/MCP79401/MCP79402

Device Selection Table

Features:

• Real-Time Clock/Calendar (RTCC), Battery

Backed:

- 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, Battery Backed

• 64-Bit Unique ID:

- User or factory programmable

- Protected EEPROM

-EUI-48™ or EUI-64™ MAC address

- Custom ID programming

• Automatic VCC Switchover to VBAT Backup

Supply

• Power-Fail Time-Stamp for Battery Switchover

• Low-Power CMOS Technology:

- Dynamic Current: 400

A max read

- Dynamic Current: 400

A max SRAM

- Battery Backup Current: <700nA @ 1.8V

• 100 kHz and 400 kHz Compatibility

• ESD Protection >4,000V

• 1 Million Erase/Write Cycles for Unique ID

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

TDFN, MSOP

• Pb-Free and RoHS Compliant

• Temperature Ranges:

- Industrial (I): -40°C to +85°C

Description:

The MCP7940X series of low-power Real-Time Clocks

(RTC) uses digital timing compensation for an accurate

clock/calendar, a programmable output control for

versatility, a power sense circuit that automatically

switches to the backup supply, and nonvolatile memory

for data storage. Using a low-cost 32.768 kHz crystal,

it tracks time using several internal registers. For

communication, the MCP7940X 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.

Along with the battery-backed SRAM memory, a 64-bit

protected EEPROM space is available for a unique ID

or MAC address to be programmed at the factory or by

the end user.

The device is fully accessible through the serial

interface while VCC is between 1.8V and 5.5V, but can

operate down to 1.3V for timekeeping and SRAM

retention only.

The RTC series of devices are available in the standard

8-lead SOIC, TSSOP, MSOP and 2x3 TDFN packages.

Package Types

Part Number

SRAM

(Bytes)

Unique ID

MCP79400

64

Blank

MCP79401

64

EUI-48™

MCP79402

64

EUI-64™

X1

X2

VBAT

VSS

VCC

MFP

SCL

SDA

1

2

3

4

8

7

6

5

MSOP

SOIC, TSSOP

X1

X2

VBAT

VSS

1

2

3

4

8

7

6

5

VCC

MFP

SCL

SDA

TDFN

X1

X2

VBAT

VSS

MFP

SCL

SDA

VCC

8

7

6

5

1

2

3

4

I2C™ Real-Time Clock/Calendar with SRAM, Unique ID

and Battery Switchover

类似零件编号 - MCP79400

制造商	部件名	数据表	功能描述
Microchip Technology	MCP79400	574Kb / 38P	I2C??Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover 2011
	MCP79400	1Mb / 42P	I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover 11/29/11
	MCP79400	920Kb / 62P	Battery-Backed I2C Real-Time Clock/Calendar with SRAM and Protected EEPROM 06/23/16
	MCP79400-I/SN	920Kb / 62P	Battery-Backed I2C Real-Time Clock/Calendar with SRAM and Protected EEPROM 06/23/16
	MCP79400T-I	1Mb / 42P	I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover 11/29/11

More results

类似说明 - MCP79400

制造商	部件名	数据表	功能描述
Microchip Technology	MCP79410	580Kb / 38P	I2C??Real-Time Clock/Calendar with EEPROM, SRAM, Unique ID and Battery Switchover 2011
	MCP7940N	562Kb / 36P	Low-Cost I2C??Real-Time Clock/Calendar with SRAM and Battery Switchover 2011
	MCP79400	574Kb / 38P	I2C??Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover 2011
Micro Analog systems	MCP7952X	946Kb / 50P	3V SPI Real-Time Clock Calendar with Battery Switchover
Microchip Technology	MCP79410	1Mb / 60P	Battery-Backed I2C??Real-Time Clock/Calendar with EEPROM and Unique ID 11/29/12 2010-2013
	MCP7940N	1Mb / 42P	Low-Cost I2C??Real-Time Clock/Calendar with SRAM and Battery Switchover 11/29/12
	MCP79510-IMS	946Kb / 50P	3V SPI Real-Time Clock Calendar with Battery Switchover 11/29/11
	MCP7940NT-I-MNY	1Mb / 42P	Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover 11/29/12
	MCP79400T-I	1Mb / 42P	I2C Real-Time Clock/Calendar with SRAM, Unique ID and Battery Switchover 11/29/11
	MCP7940N	727Kb / 58P	Battery-Backed I2C Real-Time Clock/Calendar with SRAM 09/14/21