RX-8581SA (I2C-Bus Interface Real Time Clock Module)
RX-8581SA
- Built-in frequency adjusted 32.768kHz crystal unit.
- Interface Type
I2C-Bus Interface(400kHz) - Operating voltage range
1.8V to 5.5V - Wide Timekeeper voltage range
1.6V to 5.5V - Low backup current
0.45µA / 3V(Typ.) - 32.768kHz frequency output function
C-MOS output With Control Pin - The various functions include full calendar, alarm, timer.
* The I2C-Bus is a trademark of NXP Semiconductors
Block diagram
Overview
- Interface Type
- I2C-Bus interface. (Hi-speed bus specifications 400kHz)
* I2C-Bus slave address : read A3h and write A2h
- I2C-Bus interface. (Hi-speed bus specifications 400kHz)
- 32.768kHz frequency output function
- FOUT pin output (C-MOS output ), CL=30pF
- 32.768kHz clock frequency output. (Duty 50 ±5 %)
- Timer function
- Timer interrupt function can be set up between 1/4096second and 4095minutes.
- It is recorded automatic to TF-bit at the time of event
occurrence,and possible to output with /TIRQ pin output
(N-ch open-drain output).
- Interrupt function
- Alarm interrupt function, Time update interrupt function.
Terminal connection / External dimensions
(Unit: mm)
Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec.
Specifications *Refer to application manual for details.
Recommend Operating Conditions
Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
---|---|---|---|---|---|---|
Power voltage | VDD | - | 1.8 | 3.0 | 5.5 | V |
Clock voltage | VCLK | - | 1.6 | 3.0 | 5.5 | V |
Operating temperature | TOPR | - | -40 | +25 | +85 | °C |
Frequency characteristics
Item | Symbol | Condition | Rating | Unit |
---|---|---|---|---|
Frequency tolerance | Δ f/f | Ta=+25°C VDD=3.0V |
5±23 * | ×10-6 |
FOUT output Duty | tw/t | Ta=-40°C to +85°C VDD=2.4V to 5.5V |
50±5 | % |
* Please ask for tighter tolerance.( Equivalent to 1 minute of monthly deviation )
Current consumption characteristics
Item | Symbol | Conditions | Min. | Typ. | Max. | Unit | |
---|---|---|---|---|---|---|---|
Current Consumption |
lBK | fSCL=0Hz FOE=GND FOUT;output OFF(LOW) |
VDD=5V | - | 0.65 | 1.2 | µA |
VDD=3V | - | 0.45 | 0.8 | ||||
l32k | fSCL=0Hz FOE=VDD FOUT;32.768kHz output ON CL=30pF |
VDD=5V | - | 8.0 | 20.0 | µA | |
VDD=3V | - | 5.0 | 12.0 |