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RTC-8564NB (Low Current Consumption I2C-Bus Interface Real Time Clock Module)
- Built in frequency adjusted 32.768kHz crystal unit.
- Interface Type
I2C-Bus Interface (400kHz)
- Operating voltage range
1.8V to 5.5V
- Timekeeper voltage range
1.0V to 5.5V / -20°C to +70°C
- Low backup current
275nA / 3.0V(Typ.)
- 32.768kHz frequency output function
C-MOS output With Control Pin
- The various functions include full calendar, alarm, timer,
- and power supply voltage monitoring function
Application Manual
(ETM11E-05) (724kB)
Design Support Data Download
Block diagram
Overview
- Interface Type
- I2C-Bus Interface.(Hi-speed bus specifications 400kHz)
- * I2C-Bus slave address : read A3h and write A2h
- Low Timekeeper voltage range
- 1.0V to 5.5V / Ta=-20° to +70°C
- 1.1V to 5.5V / Ta=-40° to +85°C
- 32.768kHz frequency output function
- CLKOUT pin output (C-MOS output ), CL=30pF
- CLKOE pin enables output on/off control.
- Output selectable
- < 32.768kHz, 1024Hz, 32Hz, 1Hz >
- The various interrupt function
- Timer function can be set up between 1/4096second and 255minutes.
- Alarm function can be set to any combination of day of week, hour, or minute.
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 | - | VLOW | 3.0 | 5.5 | V |
Operating temperature | TOPR | - | -40 | +25 | +85 | °C |
Low voltage detection
Item | Symbol | Condition | Typ. | Max. | Unit |
---|---|---|---|---|---|
Low voltage detection | VLOW | Ta=-20°C to +70°C | 0.9 | 1.0V | V |
Ta=-40°C to +85°C | 0.9 | 1.1V | V |
Frequency characteristics
Item | Symbol | Condition | Rating | Unit |
---|---|---|---|---|
Frequency tolerance | Δ f/f | Ta=+25°C VDD=3.0V |
5±23 * | ×10-6 |
* Please ask for tighter tolerance. (Equivalent to ±1 minute of monthly deviation)
Current consumption characteristics
Ta=-40°C to +85°C
Item | Symbol | Conditions | Min. | Typ. | Max. | Unit | |
---|---|---|---|---|---|---|---|
Current Consumption | lBK |
fSCL=0Hz CLKOE=GND CLKOUT;output OFF(LOW) |
VDD=5V | 330 | 800 | nA | |
VDD=3V | 275 | 700 | |||||
l32k |
fSCL=0Hz CLKOE=VDD CLKOUT;32.768kHz output ON (Output=OPEN ; CL=0pF) |
VDD=5V | 2.5 | 3.4 | µA | ||
VDD=3V | 1.5 | 2.2 |
Pin function
Signal Name | Input/Output | Function | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SCL | Input | Serial clock input pin. | ||||||||||||||||||
SDA | Bi-directional | Data input and output pin. | ||||||||||||||||||
CLKOUT | Output | 32.768kHz clock output pin with the output control function. (C-MOS) CLKOE pin control the condition of CLKOUT with FE-bit, etc.
|
||||||||||||||||||
CLKOE | Input | |||||||||||||||||||
/INT | Output | Interrupt output (N-ch open drain) | ||||||||||||||||||
VDD | - | Connected to a positive power supply. | ||||||||||||||||||
GND | - | Connected to a ground. |
Terminal connection / External dimensions
(Unit: mm)
The metal case inside of the molding compound may be exposed on the top or bottom of this product.
This purely cosmetic and does not have any effect on quality, reliability or electrical specs.
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).