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RX-4045NB (High-Stability Frequency)
- Built-in 32.768 kHz crystal unit
- Frequency adjusted for high accuracy.
- Interface Type
4-Wire SPI
- Operating voltage range
1.7V to 5.5V
- Wide Timekeeper voltage range
1.15V to 5.5V
- Low backup current
0.48 mA / 3 V (Typ.)
- Various detection Functions
Oscillation stop detection function etc.
- 32.768 kHz clock frequency output : N-ch open drain output
- Function of time and calendar, the various detection function,
and interrupt function etc.
Application Manual
(ETM01E-03) (876KB)
Design Support Data Download
Block diagram
Overview
- Features built-in 32.768 kHz crystal unit.
- Frequency adjusted for high accuracy
(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.
- Equipped with alarm and timer
- Timer function produces a periodic interruption signal.As for the Alarm function an optional combination is produced. (Date of the week , time , minute)
Specifications(characteristics) 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 |
Cloak 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) AA: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 | Condition | Min. | Typ. | Max. | Unit | |
---|---|---|---|---|---|---|---|
Current Consumption | lBK | CE=GND FOUT;Output OFF(Hi-z) |
VDD=5V | - | 0.60 | 1.80 | µA |
VDD=3V | - | 0.48 | 1.20 | ||||
I32k | CE=GND FOUT;32.768kHz Output ON |
VDD=3V | - | 0.65 | 2.00 | 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 |
---|---|---|
CE | Input | The chip enabled input pin. (built-in pull-down resistance) At the "H"level, access becomes possible. |
CLK | Input | The shift clock input pin for serial data transfer. |
Dl | Input | The data input pin for serial data transfer. |
DO | Output | The data output pin for serial data transfer. |
FOUT | Output | 32.768 kHz clock output pin with the output control function ( N-ch open drain ) High impedance at the time of output off. |
/INT | Output | Interrupt output ( N-ch open drain ) |
TEST | - | * Used by the manufacturer 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).