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RTC-72421 (4-bit Real Time Clock Module)
- Built-in crystal unit allows adjustment-free
efficient operation. - 24h /12h changeable and leap year automatically adjustable
(Gregorian calendar).
NOTE
- 7242series does not have complete compatibility
ability for the "old product RTC-6242 series" - When replace to 7242series from 6242 series, confirm
the technical information of RTC7242 latest manual by all means.
Block diagram
Specifications *Refer to application manual for details.
Absolute Max. rating
Item | Symbol | Condition | Min. | Max. | Unit |
---|---|---|---|---|---|
Supply voltage | VDD | Ta=+25°C | -0.3 | +7.0 | V |
Input voltage | VI/O | Ta=+25°C | GND-0.3 | VDD+0.3 | |
Storage temperature * | TSTG | - | -55 | +85 | °C |
* Stored as bare product after unpacking
Operating range
Item | Symbol | Condition | Min. | Max. | Unit |
---|---|---|---|---|---|
Power voltage | VDD | - | 4.5 | 5.5 | V |
Clock voltage | VCLK | - | 2.0 | 5.5 | |
Operating temperature | TOPR | - | -10 | +70 | °C |
* Stored as bare product after unpacking
Frequency characteristics
Item | Symbol | Condition | Range | Unit | |
---|---|---|---|---|---|
Frequency precision | Δf/f | Ta=+25°C VDD=5.0V |
72421A | ±10 | ×10-6 |
72421B | ±50 | ||||
Frequency temperature characteristics |
TOP | -10°C to +70°C (+25°C) | +10 / -120 | ||
-40°C to +85°C(+25°C) | +10 / -220 | ||||
Frequency voltage characteristics |
f/V | Ta=+25°C,VDD=2.0V to 5.5V | ±5.0 Max. | ×10-6/V | |
Aging | fa | Ta=+25°C,VDD=5.0V,First year | ±5.0 Max. | ×10-6/year |
DC characteristics
Item | Symbol | Condition | Min. | Typ. | Max. | Unit | Applicable terminal | |
---|---|---|---|---|---|---|---|---|
Current consumption | IDD1 | CS1= 0V Exclude input/ output current |
VDD=5V | - | 1 | 10 | µA | - |
IDD2 | VDD=2V | 0.9 | 5 | - | ||||
HIGH input voltage (1) | VIH1 | - | 2.2 | - | - | V | All inputs other than CS1 | |
LOW input voltage (1) | VIL1 | - | 0.8 | |||||
LOW output voltage (1) | VOL1 | IOL=2.5mA | - | 0.4 | V | D0 to D3 | ||
HIGH output voltage | VOH | IOH=-400µA | 2.4 | - | ||||
LOW output voltage (2) | VOL2 | IOL=2.5mA | - | 0.4 | STD.P | |||
OFF leak current | IOFFLK | V1=VDD/0V | 10/-10 | µA | ||||
Input capacity | C1 | Input frequency 1MHz | 10 | - | pF | Input other than D0 to D3 | ||
20 | D0 to D3, STD.P | |||||||
HIGH input voltage (2) | VIH2 | VDD=2.0V to 5.5V | 4/5VDD | - | V | CS1 | ||
LOW input voltage (2) | VIL2 | - | 1/5VDD | |||||
Input leak current (1) | ILK1 | V1=VDD/0V | - | 1/-1 | µA | Input other than D0 to D3 | ||
Input leak current (2) | ILK2 | 10/-10 | D0 to D3 |
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.