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RX-8025SA (High-Stability I2C-Bus Interface Real Time Clock Module)
- Built-in 32.768kHz crystal unit
Frequency adjusted for high accuracy(±5×10-6 / Ta=+25°C)
- Interface Type
I2C-Bus Interface (400kHz)
- Operating voltage range
1.70V to 5.5V
- Wide voltage for timekeeping
1.15V to 5.5V
- Various detection Functions
Ex. Oscillation stop detection function
- Low backup current
0.48µA / 3V(Typ.)
- 32.768kHz frequency output function
C-MOS output with OE pin
- The various functions include full calendar,Dual alarm, Periodic interruption
Application Manual
(ETM10-04) (741kB)
Design Support Data Download
Block diagram
Overview
- Features built-in 32.768kHz crystal unit
- Frequency adjusted for high accuracy.
(±5×10-6 / Ta=+25°C)
(Equivalent to 13 seconds of monthly deviation)
- Frequency adjusted for high accuracy.
- The various detection function
- Power supply voltage monitoring function
(with selectable detection threshold) - Stop detection function
- Power-on reset detection function
- Power supply voltage monitoring function
- Alarm function and Periodic interrupt function
- The periodic interrupt outputs
- Dual Alarm function.
(Date of the week , Hour , minute)
(Month, Day, Hour, Minute )
Specifications *Refer to application manual for details.
Recommend Operating Conditions
Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
---|---|---|---|---|---|---|
Power voltage | VDD | - | 1.7 | 3.0 | 5.5 | V |
Clock voltage | VCLK | - | 1.15 | 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 |
AA: 5±5 *1) AC: 0±5 *2) |
×10-6 |
Oscillation start-up time | tSTA | Ta=+25°C VDD=2.0V |
1 Max. | s |
Frequency voltage characteristics | f/V | Ta=+25°C VDD=2.0V to 5.5V |
±1 Max. | ×10-6 |
*1) 2) Equivalent to ±13 seconds of monthly deviation (excluding offset).
Current consumption characteristics
Ta=-40°C to +85°C
Item | Symbol | Conditions | Min. | Typ. | Max. | Unit | |
---|---|---|---|---|---|---|---|
Current Consumption | lBK | fSCL=0Hz FOE=GND FOUT;output OFF(LOW) |
VDD=5V | - | 0.60 | 1.80 | µA |
VDD=3V | - | 0.48 | 1.20 | ||||
l32k | fSCL=0Hz VDD,FOE=5.5V FOUT;output ON (Output=OPEN;CL=0pF) |
VDD=5.5V | - | 3.0 | 6.5 | µA |
Power supply detection voltage
Ta=-30°C to +70°C
Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
---|---|---|---|---|---|---|
High-voltage mode | VDETH | VDD pin | 1.90 | 2.10 | 2.30 | V |
Low-voltage mode | VDETL | VDD pin | 1.15 | 1.30 | 1.45 | V |
Pin function
Signal Name | Input/Output | Function | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
SCL | Input | Serial clock input pin | |||||||||||||||||||||
SDA | Bi-directional | Data input and output pin | |||||||||||||||||||||
FOUT | Output | 32.768kHz clock output pin with the output control function. (C-MOS)
|
|||||||||||||||||||||
FOE | Input | ||||||||||||||||||||||
/ INTA | Output | Interrupt output A pin (N-ch open drain) | |||||||||||||||||||||
/ INTB | Output | Interrupt output B pin (N-ch open drain) | |||||||||||||||||||||
TEST | - | *Used by the manufacture for testing. (Do not connect externally.) |
|||||||||||||||||||||
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).