The ADM823/ADM824/ADM825 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. In addition to providing power-on reset signals, an on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. A reset signal can also be asserted by an external push-button, through a manual reset input. The three parts feature different combinations of watchdog input, manual reset input, and output stage configuration, as shown in Table 1.
These parts are available in a choice of seven reset threshold options ranging from 2.19 V to 4.63 V. The reset and watchdog timeout periods are fixed at 140 ms (minimum) and 1.6 sec (typical), respectively.
The ADM823/ADM824/ADM825 are available in 5-lead SC70 and SOT-23 packages and typically consume only 5 μA, making them suitable for use in low power, portable applications.
Features and Benefits
| Power Management |
| Document | note |
| ADM823/ADM824/ADM825: Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23 Data Sheet (Rev. D) | PDF 454 kB |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| ADM825LYRJZ-R7 Production | 5 ld SOT-23 | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADM825MYKSZ-R7 Last Time Buy | 5 ld SC70 | REEL 3000 | -40 to 125C | 0 | 0.56 | Y |
| ADM825MYRJ-R7 Last Time Buy | 5 ld SOT-23 | REEL 3000 | -40 to 125C | 0 | 0.6 | N |
| ADM825RYRJZ-R7 Production | 5 ld SOT-23 | REEL 3000 | -40 to 125C | 0 | 0.51 | Y |
| ADM825SYKSZ-R7 Production | 5 ld SC70 | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADM825SYRJZ-R7 Production | 5 ld SOT-23 | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADM825TYKSZ-R7 Production | 5 ld SC70 | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADM825TYRJZ-R7 Production | 5 ld SOT-23 | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
| ADM825ZYKSZ-R7 Production | 5 ld SC70 | REEL 3000 | -40 to 125C | 0 | 0.6 | Y |
