RX8111CE
内置32.768KHZ/电源切换/定时器功能 时间戳功能 小尺寸 超低功耗0.1µA
- 品牌： EPSON
- 尺寸/封装： 3.2 x 2.5 x 1.0 mm
- 重要参数： ±11.5,±23PPM
- 电压： 1.6-5.5V
- 接口： I2C
- 频率： 32.768KHZ
- 工作温度： -40~+105℃
- 封装： 10P 3225
- 产品应用： 充电桩/UPS/智能路灯/温控器/医疗设备
- 产品参数
- 品牌： EPSON
- 尺寸/封装： 3.2 x 2.5 x 1.0 mm
- 重要参数： ±11.5,±23PPM
- 电压： 1.6-5.5V
- 接口： I2C
- 频率： 32.768KHZ
- 工作温度： -40~+105℃
- 封装： 10P 3225
- 产品应用： 充电桩/UPS/智能路灯/温控器/医疗设备
Block diagram
Overview
- Interface Type
I2C-Bus interface Fast-Mode 400 kHz
- Auto power switching function
The VDD voltage is monitored and it switches to the backup power supply by the automatic operation
Backup power supply switching voltage 1.2 V Min.
- Clock output function
Output frequency is selectable from 32.768 kHz, 1024 Hz,1 Hz
- Wakeup timer function
Selectable from 244 micro second to 32 years （24 bit 1 ch.）
Timer source clock selectable from 1/60 Hz, 1 Hz, 64 Hz, 4096 Hz
Auto release after interrupt output from /INT pin at timer completes
This operation is auto repeat with a selected cycle, it can be used like a watchdog timer
Time stamp function
8 times stamped from year to 1/256 seconds
The time-stamp trigger inputs from EVIN pin, self-monitoring and I2C software command
EVIN pin has function of chattering-cancel
Alarm function
It is possible program from year to second
Self-monitoring interruption
Crystal oscillation stop. VBAT low, VDD low
Specifications （characteristics）
Pin function
| Signal Name | I / O | Function |
|---|---|---|
| EVIN | input | External event input pin （Pull up/down and polarity are selectable by software） |
| SCL | input | Serial clock input pin |
| SDA | Input / Output | Data input and output pin |
| FOUT | Output | Frequency output （CMOS） （frequency selection: 32.768 kHz / 1024 Hz / 1 Hz） |
| /INT | Output | Interrupts output by Alarm and Timer events （N-ch. open drain） |
| VDD | - | Power-supply pin. It can input the voltage unlike VIO |
| VIO | - | Interface power supply pin. Input to supply the voltage same as a host |
| VOUT | - | Internal voltage output pin. Connect smoothing capacitor of 1.0 µF surely |
| VBAT | - | This is a power supply pin for backup battery Connect a EDLC, secondary battery, a primary battery In the backup voltage range, supplied to IC, from this pin |
| GND | - | Ground pin |
Terminal connection/External dimensions
（Unit: mm）
Footprint （Recommended）
（Unit: mm）
To maintain stable operation, provide a 0.1uF by-pass capacitor
at a location as near as possible to the power source terminal of the crystal product （between Vcc - GND）
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