PCA8802 Smartcard RTC; ultra low power oscillator with integrated counter for initiating one time password generation
The PCA8802 is a CMOS integrated circuit for battery operation, typically supplied by button cells or flexible polymer batteries. Incorporated is a 32.768 kHz quartz crystal oscillator circuit including the two load capacitors. The circuit is optimized for a quartz with 6 pF load capacitance specification. Higher values can also be used with the addition of external load capacitors.
The main function of the oscillator is to generate a 1⁄32 Hz clock signal which is used to increment a 24 bit binary counter. The counter can be read over the serial interface and can also be set to any desired value. Control over the divider chain also allows for accurate starting of the counter. Incrementing of the counter value during read is prevented by freezing of the counter during access.
An interrupt signal is also available and is triggered coincident with the counter updating. This signal can be used as a wake-up for a microcontroller
产品特点 Features
- 32.768 kHz quartz oscillator, amplitude regulated with excellent frequency stability and high immunity to leakage currents
- Two integrated quartz crystal oscillator capacitors
- Very low current consumption: typically 130 nA
- Two-wire serial interface (I²C-bus)
- Integrated 24-bit counter with auto increment every 32 seconds
- Interrupt output for processor wake-up
- Stop function for accurate time setting and current saving during shelf life
- User test modes for accelerated application testing and development
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应用
- One time password function generators
- Ultra low-power time keeper circuit
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封装
| 型号 |
订购码 (12NC) |
可订购的器件编号 |
产品状态 |
封装 |
| PCA8802U/12AA/1 |
9352 976 73005 |
PCA8802U/12AA/1,00 |
|
|
| PCA8802U/2AA/1 |
9352 885 35026 |
PCA8802U/2AA/1,026 |
|
|
| PCA8802UG/12KB/1 |
9352 990 08005 |
PCA8802UG/12KB/1,0 |
|
|
订货和供应
| 型号 |
订购码 (12NC) |
可订购的器件编号 |
化学成分 |
| PCA8802U/12AA/1 |
9352 976 73005 |
PCA8802U/12AA/1,00 |
PCA8802U/12AA/1 |
| PCA8802U/2AA/1 |
9352 885 35026 |
PCA8802U/2AA/1,026 |
PCA8802U/2AA/1 |
| PCA8802UG/12KB/1 |
9352 990 08005 |
PCA8802UG/12KB/1,0 |
PCA8802UG/12KB/1 |
PCA8802 技术支持
| 档案名称 |
标题 |
类型 |
格式 |
| PCA8802 |
Smartcard RTC; ultra low power oscillator with integrated counter for initiating one time password generation |
Data sheet |
pdf |
| AN10853 |
ESD and EMC sensitivity of IC
|
Application note |
pdf |
| UM10301 |
User Manual for NXP Real Time Clocks PCF85x3, PCA8565 and PCF2123, PCA2125
|
User manual |
pdf |
| UM10569 |
Store and transport requirements
|
User manual |
pdf |
| R_10015 |
Chip-On-Glass (COG) - a cost-effective and reliable technology for LCD displays
|
Other type |
pdf |
| UM10204 |
I2C-bus specification and user manual
|
User manual |
pdf |
| UM10206 |
I2C Demonstration Board 2005-1 Quick Start Guide
|
User manual |
pdf |
| UM10569 |
Store and transport requirements
|
User manual |
pdf |
| UM10204_JA |
I2C-bus specification and user manual
|
User manual |
pdf |
