PCF8523U Real-Time Clock (RTC) and calendar
The PCF8523 is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption. Data is transferred serially via the I²C-bus with a maximum data rate of 1000 kbit/s. Alarm and timer functions are available with the possibility to generate a wake-up signal on an interrupt pin. An offset register allows fine-tuning of the clock. The PCF8523 has a backup battery switch-over circuit, which detects power failures and automatically switches to the battery supply when a power failure occurs
产品特点 Features
- Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
- Resolution: seconds to years
- Clock operating voltage: 1.0 V to 5.5 V
- Low backup current: typical 150 nA at VDD = 3.0 V and Tamb = 25 °C
- 2 line bidirectional 1 MHz Fast-mode Plus (Fm+) I²C interface, read D1h, write D0h
- Battery backup input pin and switch-over circuit
- Freely programmable timer and alarm with interrupt capability
- Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF
- Internal Power-On Reset (POR)
- Open-drain interrupt or clock output pins
- Programmable offset register for frequency adjustment
|
应用
- Time keeping application
- Battery powered devices
- Metering
|
封装
| 型号 |
可订购的器件编号 |
订购码 (12NC) |
产品状态 |
封装 |
| PCF8523U/12AA/1 |
9352 938 87005 |
PCF8523U/12AA/1,00 |
量产 |
UC
(OL-PCF8523U) |
订货和供应
| 型号 |
订购码 (12NC) |
可订购的器件编号 |
化学成分 |
| PCF8523U/12AA/1 |
9352 938 87005 |
PCF8523U/12AA/1,00 |
PCF8523U/12AA/1 |
PCF8523U 技术支持
| 档案名称 |
标题 |
类型 |
格式 |
| PCF8523U |
Real-Time Clock (RTC) and calendar |
Data sheet |
pdf |
| AN10441 |
Level shifting techniques in I2C-bus design
|
Application note |
pdf |
| AN255 |
I2C / SMBus Repeaters, Hubs and Expanders
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Application note |
pdf |
| AN10710 |
Features and applications of the PCF8523 I2C-bus extender
|
Application note |
pdf |
| 75016527 |
Extend standard I2C-bus devices without worrying about offset voltages; NXP I2C-bus extender PCF8523 in a proven application
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Brochure |
pdf |
| 75016532 |
Extend the I2C-bus with advanced repeaters and hubs; NXP 2-channel I2C-bus repeaters PCF8523x and 5-channel I2C-bus hubs PCA9516x
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Leaflet |
pdf |
| 75016080 |
Extend the reach of any I2C-bus system without special offset voltage levels; NXP I2C-bus extender PCF8523
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Leaflet |
pdf |
| 75017424 |
NXP I2C-bus solutions 2013: Smart, simple solutions for the 12 most common design concerns
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Leaflet |
pdf |
| UM10204 |
I2C-bus specification and user manual
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User manual |
pdf |
| UM10206 |
I2C Demonstration Board 2005-1 Quick Start Guide
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User manual |
pdf |
| UM10323 |
PCA9600 demonstration board OM6293
|
User manual |
pdf |
