RX-8025NB (High-Stability I2C-Bus Interface Real Time Clock Module)
RX-8025NB
- 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
- *The I2C-Bus is a trademark of NXP Semiconductors
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 )
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)
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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.) |
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VDD | - | Connected to a positive power supply. | |||||||||||||||||||||
GND | - | Connected to a ground. |
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 | - | 1.7 | 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 |