Datasheet > MCP79411T-I/MNY

MCP79411T-I/MNY

更新时间： 2024-11-25 22:54:47

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
66页	980K
描述
IC RTC CLK/CALENDAR I2C 8-TDFN

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数据手册

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MCP79411T-I/MNY 数据手册

MCP79410/MCP79411/MCP79412

Battery-Backed I²C Real-Time Clock/Calendar with

SRAM, EEPROM and Protected EEPROM

Device Selection Table

Operating Ranges

• 2-Wire Serial Interface, I²C Compatible:

- I²C clock rate up to 400 kHz

Part Number

Protected EEPROM

MCP79410

Unprogrammed

EUI-48^™

• Temperature Range:

- Industrial (I): -40°C to +85°C

MCP79411

MCP79412

EUI-64^™

Packages

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

Timekeeping Features

General Description

• 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 range

• 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

The MCP7941X 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 MCP7941X

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 MCP7941X 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

backup 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.

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 VBAT: 925 nA at 3.0V

• Automatic Switchover to Battery Backup

The MCP7941X features 1 Kbit of internal nonvolatile

EEPROM with software write-protectable regions.

There is an additional 64 bits of protected nonvolatile

memory which is only writable after an unlock sequence,

making it ideal for storing a unique ID or other critical

information. The MCP79411 and MCP79412 are

pre-programmed with EUI-48 and EUI-64 addresses,

respectively. Custom programming is also available.

User Memory

Package Types

• 64-Byte Battery-Backed SRAM

• 1 Kbit EEPROM Memory:

- Software write-protect

SOIC, TSSOP, MSOP

TDFN

VCC

MFP

SCL

- Page write up to eight bytes

- Endurance: 1M Erase/Write cycles

• 64-Bit Protected EEPROM Area:

- Robust write unlock sequence

- EUI-48^™MAC address (MCP79411)

- EUI-64^™MAC address (MCP79412)

X1 1

X2 2

VCC

MFP

SCL

SDA

VBAT

VSS

V_BAT

VSS

SDA

 2010-2016 Microchip Technology Inc.

DS20002266H-page 1

12 3 4 5 6 7...66

中文翻译

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与MCP79411T-I/MNY相关器件

型号	品牌	获取价格	描述	数据表
MCP79411T-I/MS	MICROCHIP	获取价格	IC RTC CLK/CALENDAR I2C 8-MSOP
MCP79411T-I/SN	MICROCHIP	获取价格	IC RTC CLK/CALENDAR I2C 8-SOIC
MCP79411T-I/ST	MICROCHIP	获取价格	IC RTC CLK/CALENDAR I2C 8-TSSOP
MCP79412	MICROCHIP	获取价格	I2C? Real-Time Clock/Calendar with EEPROM, SRAM, Unique ID and Battery Switchover
MCP79412-I/MS	MICROCHIP	获取价格	IC RTC CLK/CALENDAR I2C 8-MSOP
MCP79412-I/SN	MICROCHIP	获取价格	IC RTC CLK/CALENDAR I2C 8-SOIC
MCP79412-I/ST	MICROCHIP	获取价格	IC RTC CLK/CALENDAR I2C 8-TSSOP
MCP79412T-I/MNY	MICROCHIP	获取价格	REAL TIME CLOCK, PDSO8, 2 X 3 MM, 0.75 MM HEIGHT, ROHS COMPLAINT, PLASTIC, TDFN-8
MCP79412T-I/MS	MICROCHIP	获取价格	IC RTC CLK/CALENDAR I2C 8-MSOP
MCP79412T-I/SN	MICROCHIP	获取价格	IC RTC CLK/CALENDAR I2C 8-SOIC

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