Low power consumption with 200ms delay time supervisory Circuit
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The PT7M64xx series are µP supervisory circuits with a minimum reset timeout period of 120ms. Each circuit includes a precise bandgap reference; a comparator, a reset timeout circuit, internally trimmed resistor networks that set specified trip thresholds, and an internal 5% threshold hysteresis circuit (see the Block Diagram). Output is asserted when VCC falls below the internal VTH- and remains asserted until VCC rises above VTH+ (VTH+ = VTH-×1.05) after a reset timeout period. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring normal systems voltage from +1.8V to +5V in 100mV increments. The series are voltage detectors with a propagation delay of 35µs.
The family is available with four output stage options: push-pull with active-low output, push-pull with active high output, open drain with active-low output and bidirection port with active-low output and pushbutton reset input. These devices specified over the -40°C to +85°C temperature range.
| Adjustable Detect Voltage Reference Voltage (V) | N/A |
|---|---|
| Ambient Temperature Range (°C) | -40 to 85 |
| Fixed Detect Voltages (V) | 1.8 to 5 |
| Manual RESET | No |
| Maximum Input Voltage (V) | 5.5 |
| Minimum Operating Voltage (V) | 1.2 |
| Number of Channels | 1 |
| Power Fail Comparator Threshold (V) | None |
| Quiescent Current (µA) | 0.6 |
| RESET Output (Active High) | Yes |
| RESET Output (Active Low) | No |
| Reset Output Topology | Push-Pull |
| Reset Period (ms) | 260 |
| Typical Time Delay (µs) | 35 |
| Watchdog | No |
| Watchdog Time (s) | None |
