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MCP7940N-ISLASHP中文資料微芯科技數(shù)據(jù)手冊PDF規(guī)格書

MCP7940N-ISLASHP
廠商型號

MCP7940N-ISLASHP

功能描述

Battery-Backed I2C Real-Time Clock/Calendar with SRAM

文件大小

727.62 Kbytes

頁面數(shù)量

58

生產(chǎn)廠商 Microchip Technology
企業(yè)簡稱

MICROCHIP微芯科技

中文名稱

微芯科技股份有限公司官網(wǎng)

原廠標識
數(shù)據(jù)手冊

下載地址一下載地址二到原廠下載

更新時間

2025-6-23 9:02:00

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MCP7940N-ISLASHP規(guī)格書詳情

General Description

The MCP7940N 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

MCP7940N 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 MCP7940N 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.

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 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

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

供應(yīng)商 型號 品牌 批號 封裝 庫存 備注 價格
Microchip Technology
24+
8-MSOP
35200
一級代理/放心采購
詢價
MICROCHIP/微芯
24+
N/A
5000
原裝分貨 強勢渠道
詢價
MICROCHIP
22+23+
MSOP8
8000
新到現(xiàn)貨,只做原裝進口
詢價
MICROCHIP(美國微芯)
2021+
MSOP-8
499
詢價
Microchip
24+
MSOP8
10000
只做原裝
詢價
Microchip
25+
原廠原裝
16000
原裝優(yōu)勢絕對有貨
詢價
Microchip Technology
2022+
8-MSOP
38550
全新原裝 支持表配單 中國著名電子元器件獨立分銷
詢價
MICROCHIP(美國微芯)
23+
MSOP-8
7087
原裝現(xiàn)貨,免費送樣,可開原型號稅票。提供技術(shù)支持
詢價
MICROCHIP(美國微芯)
24+
MSOP8
7350
現(xiàn)貨供應(yīng),當天可交貨!免費送樣,原廠技術(shù)支持!!!
詢價
Microchip
24+
原封裝
44520
鄭重承諾只做原裝進口現(xiàn)貨
詢價