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Discontinued Product
RX-4575LC (Built-in External Event Detection. Serial Interface Real Time Clock
Module)
- Built in frequency adjusted 32.768kHz crystal unit.
- Interface Type
3-wire serial interface
- Operating voltage range
1.6V to 5.5V
- Wide Timekeeper voltage range
1.3V to 5.5V
- Low backup current
0.35µA / 3V(Typ.)
- External event detection
Chattering free input port *2.
- (The various functions include full calendar, alarm, timer.)
Block diagram
Overview
- Event detection.
- Selectable Hi detection or Lo detection.
- Recognition of detection is available both the hardware
interrupt and the monitor via software. - Automatic interrupt release mode is available.
- The all 'OR' interrupt output is possible via alarm, timer and event detection.
- Performance of event input terminal.
- As for the chattering filter,
following are prepared for. ( 8ms, 31ms, 62ms, 125ms ) - Built-in resistor connect and release is possible via software.
Selectable pull-up or pull-down.
- As for the chattering filter,
- Timer function
- Built in 12bit counter.
- Timing period are 1min, 1s, 64Hz, 4096Hz.
- Alarm function
- Alarm setting is possible by combination of a day, hours, and minutes.
Pin function
Signal Name | Input/Output | Function |
---|---|---|
EINA EINB |
Input | External event input pin. |
CE 0 CE 1 |
Input | Interface is possible when both CE0 and CE1 is high level. |
CLK | Input | Serial Clock input pin. |
DATA | Bi-directional | Data input and output pin. |
FOUT | Output | 32.768kHz clock output pin (C-MOS). Output is Hi-Z when OFF. |
FOE | Input | 32kHz is output when input is Hi, 32kHz is OFF when input is Lo. |
/ EIRQ | Output | Interrupt output pin. (N-ch open drain). |
/ IRQ | Output | Interrupt output pin. (N-ch open drain). |
VDD | - | Connected to a positive power supply. |
GND | - | Connected to a ground. |
Terminal connection / External dimensions
(Unit: mm)
Specifications *Refer to application
Recommend Operating Conditions
Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
---|---|---|---|---|---|---|
Power voltage | VDD | - | 1.6 | 3.0 | 5.5 | V |
Clock voltage | VCLK | - | 1.3 | 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 |
Oscillation start-up time | tSTA | Ta=+25°C VDD=1.6V |
1Max. | s |
Ta=-40°C to +85°C VDD=1.6V |
3Max. | s |
* Equivalent to 1minute of monthly deviation
Current consumption characteristics
*Ta=-40°C to +85°C
Item | Symbol | Conditions | Min. | Typ. | Max. | Unit | |
---|---|---|---|---|---|---|---|
Current Consumption |
lBK | CE0, CE1=GND / IRQ, / EIRQ= OFF FOUT: output OFF Event detection OFF |
VDD=5V | 0.45 | 0.9 | µA | |
VDD=3V | 0.35 | 0.7 | |||||
l32k | CE0,CE1=GND / IRQ, / EIRQ= OFF FOUT ; CL=30pF 32.768kHz output ON |
VDD=5V | 8.0 | 20.0 | µA | ||
VDD=3V | 5.0 | 12.0 |