Datasheet 搜索 > 实时时钟芯片 > Microchip（微芯） > MCP7940NT-I/SN 数据手册 > MCP7940NT-I/SN 其他数据使用手册 1/42 页
器件3D模型￥ 3.696
MCP7940NT-I/SN 其他数据使用手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
实时时钟芯片
封装:
SOIC-8
描述:
低成本I2C实时时钟/日历与SRAM和电池切换 Low-Cost I2C Real-Time Clock/Calendar with SRAM and Battery Switchover
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
导航目录
MCP7940NT-I/SN数据手册
Page:
of 42 Go
若手册格式错乱，请下载阅览PDF原文件
2011-2012 Microchip Technology Inc. DS25010D-page 1
MCP7940N
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
• Automatic V
CC Switchover to VBAT Backup
Supply
• Power-Fail Time-Stamp for Battery Switchover
• Low-Power CMOS Technology:
- Dynamic Current: 400 A max read
- Battery Backup Current: <700nA @ 1.8V
• 100 kHz and 400 kHz Compatibility
• ESD Protection >4,000V
• Packages include 8-Lead SOIC, TSSOP, 2x3
TDFN, MSOP
• Pb-Free and RoHS Compliant
• Temperature Ranges:
- Industrial (I): -40°C to +85°C
- Extended (E): -40°C to +125°C
Description:
The MCP7940N 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. Using a low-cost 32.768
kHz crystal, it tracks time using several internal regis-
ters. For communication, the MCP7940N uses the
I
2
C™ 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 device is fully accessible through the serial
interface while V
CC 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)
MCP7940N 64
X1
X2
V
BAT
VSS
VCC
MFP
SCL
SDA
1
2
3
4
8
7
6
5
MSOP
SOIC, TSSOP
X1
X2
V
BAT
VSS
1
2
3
4
8
7
6
5
V
CC
MFP
SCL
SDA
TDFN
X1
X2
V
BAT
VSS
MFP
SCL
SDA
V
CC
8
7
6
5
1
2
3
4
Low-Cost I
2
C™ Real-Time Clock/Calendar
with SRAM and Battery Switchover
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
