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RX-4035SA (SPI-Bus Real Time Clock Module)
- Built in 32.768 kHz crystal unit
Frequency adjusted for high accuracy.(±5x10-6/Ta=+25°C)
- Interface Type
SPI-Bus (1MHz)
- Operating voltage range
2.4V to 5.5V
- Timekeeping voltage range
1.0V to 5.5V
- Low backup current
350nA(SA) 400nA(LC)/ 3V(Typ.)
- Event detection and Time stamp
One-shot full timestamp and interrupt.
- Dual event detection ports
Each terminal has a de-bounce circuit.
- Auto power switching functions
When VDD deteriorates than 2.4V,internal source is switched to VBAT.
Application Manual
(ETM36E-07) (1.4MB)
Design Support Data Download
Block diagram
Overview
- The event detection and Timestamp function
- Dual event detection terminals.
- Selectable de-bounce period 35ms or 2s.
- Available event detection interrupt output.
- Power switching functions.
- When VDD is less than 2.4V, an internal source is switched to VBAT.
- Note: When the supply from VBAT, SPI interface are disabled.
- Alarm, Periodic interrupt, 32.768kHz clock output.
- Available monthly-alarm and weekly-alarm.
- Interrupt period are selectable from 2Hz to Monthly.
- CLKOUT outputs 32.768kHz clock powered by VDD.
Specifications (characteristics) *Refer to application manual for details.
Recommend Operating Conditions
Item | Symbol | Conditions | Min. | Typ. | Max. | Unit |
---|---|---|---|---|---|---|
Operating voltage | VACCESS | VDD | 2.4 | 3.0 | 5.5 | V |
Time keeping voltage | VCLK | VBAT | 1.0 | 3.0 | 5.5 | V |
Operating temperature | TOPR | - | -40 | +25 | +85 | °C |
Storage temperature | TSTG | - | -55 | - | +125 | °C |
Frequency characteristics
Item | Symbol | Conditions | Rating | Unit |
---|---|---|---|---|
Frequency tolerance | Δ f/f | Ta=+25°C VBAT=3.0V | B: 5±23 *1) AA: 5±5 *2) AC: 0±5 *2) |
×10-6 |
Oscillation start-up time | tSTA | Ta=+25°C VDD=3.0V | 1 Max. | s |
Frequency/voltage characteristics | f/V | Ta = +25°C VDD=2.4V to 5.5V | ±1 Max. | ×10-6 |
*1) Equivalent to ±1 minute of monthly deviation (excluding offset.)
*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 | lBAT | RX-4035SA VBAT=3.0V, VDD=0.0V CE=0V, CLKOUT=open |
- | 350 | 1200 | nA |
IDD | VDD=3.0V CE=0V CLKOUT=open | - | 1.40 | 2.50 | µA |
Power supply detection voltage
Ta=-40°C to +85°C
Item | Symbol | Condition | Min. | Typ. | Max. | Unit |
---|---|---|---|---|---|---|
VBAT detect voltage | VLOW | - | 1.10 | 1.25 | 1.40 | V |
Power switching voltage (VDD to VBAT) |
VD2B | +25°C | 2.328 | 2.40 | 2.472 | V |
Pin function
Signal Name | Input/Output | Functions |
---|---|---|
VBAT | - | Power supply for backup. |
Vout | Output | Switched power out.(maximum output current 20mA) |
CE | Input | SPI chip enable. |
CLK | Input | SPI serial clock. |
SO | Input | SPI data out. |
SI | Input | SPI data in. |
GND | - | Ground |
EVIN1 | Input | Event detection input 1 |
EVIN2 | Input | Event detection input 2 |
/ INT | Output | Interrupt out. |
CLKOUT | Output | 32.768kHz output. (CMOS. Can not inhibit.) |
N.C. | - | Do not connect. |
VDD | - | Main power supply. |
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).