MIC1232
The MIC1232 is a multifunction circuit which monitors microprocessor activity, external reset and power supplies in microprocessor based systems. The circuit functions include a watchdog time, power supply monitor, microprocessor reset, and manual pushbutton reset input.
The power supply line is monitored with a comparator and an internal voltage reference. /RST is forced low when an out-of-tolerance condition exists and remains asserted for at least 250ms after VCC rises above the threshold voltage (4.5V or 4.75V). The /RST pin will remain logic low with VCC as low as 1.4V.
The Watchdog input (/ST) monitors µP activity and will assert /RST if no µP activity has occurred with in the watchdog timeout period. The watchdog timeout period is selectable with nominal period of 150, 600, 1200 milliseconds.
Features- Power OK/Reset time delay, 250ms min.
- Watchdog timer, 150ms, 600ms, or 1.2s typical
- Precision supply voltage monitor, select between 5% or 10% of supply voltage
- Available in 8-pin surface mount (SO)
- Debounced External reset input
- Low supply current, <18µA typical
| Parameter|
Parameter Name
Value
| Value | |
Watchdog Timer
Yes
|
Yes
| |
Typical Reset Pulse Width (ms)
250
|
250
| |
Reset Type
Active-High/Low Push-Pull
|
Active-High/Low Push-Pull
| |
Typical Supply Current (uA)
18
|
18
| |
Nominal Reset Voltage (V)
4.37, 4.62
|
4.37, 4.62
| |
Product Type
Single Voltage Monitor
|
Single Voltage Monitor
|
|
Documents
Ordering Information
| Part Number | Leads | Package Type | Temp Range | Packing | 1+ | 26+ | 100+ | 1000+ | 5000+ |
|---|
| MIC1232MY | 8 | SOIC | -40C to +85C | TUBE | 0.95 | 0.79 | 0.72 | 0.60 | 0.55 |
| MIC1232MY-TR | 8 | SOIC | -40C to +85C | T/R | 0.95 | 0.79 | 0.72 | 0.60 | 0.55 |
| MIC1232NY | 8 | PDIP | -40C to +85C | TUBE | 1.45 | 1.21 | 1.10 | 0.92 | 0.85 |
RoHS Information
| PartNumber | DeviceWeight | ShippingWeight | LeadCount | PackageType | PackageWidth | SolderComposition | JEDECIndicator | RoHS | ChinaEFUP |
|---|
| MIC1232NY | 0.486700 | 0.900000 | 8 | PDIP | .300in | Matte Tin | e3 |  |  |
| MIC1232MY | 0.075000 | 0.163265 | 8 | SOIC | 3.90mm(.150in) | NiPdAu | e4 | | |
| MIC1232MY-TR | 0.075000 | 0.250000 | 8 | SOIC | 3.90mm(.150in) | NiPdAu | e4 | | |
