ELM7C3793xxxxA CMOS voltage detector with dual input watchdog timer
ELM7C3793 series is an integrated circuit to monitor power voltage; it incorporates a watchdog timer. A reset signal is output when the power is cut or falls abruptly. When the power recovers normally after resetting, a power-on reset signal is output to microprocessor units (MPUs). An internal watchdog timer with two inputs for system operation diagnosis can provide a fail-safe function for various application systems. The standard detection voltages are 3.0V, 3.7V, 4.2V and 4.5V; ELM7C3793 series can also be made as semi-custom IC within the range of 1.6V to 5.0V by 0.1V step.
| Detection voltage with hysteresis function. | |
|---|---|
| Integrated dual input watchdog timer. | |
| Watchdog timer with stop function(inhibit pin). | |
| Independent setting on watchdog monitoring time and reset time. | |
| Detect accurate supply voltage drop | ±2.5% |
| Low current consumption | Typ.31µV |
| Package | SOP-8 150mil SOP-8 208mil SON8-3x3 |
| Datasheet | ELM7C3793Series |
- Application
- Reset for Microprocessor, etc.
- Power voltage monitoring IC (Reset IC) ELM 7C series)
- This product is alternative parts that “C” company have discontinued a selling.Please contact us once, if you have trouble with parts procurement.
- In addition, since ELM7C3771xxxA/ELM7C377342xA is new product developed in-house, the power consumption is a quarter of the conventional product.
Absolute Maximum Ratings
| Parameter | Symbol | Limit | Unit |
|---|---|---|---|
| Power supply | Vcc | 6.5 | V |
| Input voltage:CK1 | Vck1 | Vss-0.3 to Vcc+0.3 | V |
| Input voltage:CK2 | Vck2 | Vss-0.3 to Vcc+0.3 | V |
| Input voltage:INH | Vinh | Vss-0.3 to Vcc+0.3 | V |
| Reset output voltage (RESET_B) | Voh,Vol | Vss-0.3 to Vcc+0.3 | V |
| Reset output current (RESET_B) | Ioh, Iol | -10 to 10 | mA |
| Power dissipation | Pd | 300(SOP-8 150mil) 300(SOP-8 208mil) 500(SON8-3x3) | mW |
| Operating temperature | Top | -40 to +85 | °C |
| Storage temperature | Tstg | -55 to +125 | °C |
Block diagram
