Overview
The ADM1232ARNZ, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed to monitor and protect microprocessor systems from various failure conditions. This component is pin-compatible with the MAX1232, DS1232LP, and DS1232, making it a versatile option for system designers. It can monitor the microprocessor supply voltage, detect if the microprocessor has locked up, and handle external interrupts. The ADM1232ARNZ is available in several package types, including 8-lead MSOP, 8-lead PDIP, 16-lead wide SOIC, and 8-lead narrow SOIC.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC-8, MSOP-8, PDIP-8, SOIC-16 |
| Pins | 8 (for SOIC-8, MSOP-8, PDIP-8), 16 (for SOIC-16) |
| Temperature Range | -40°C to +85°C |
| Supply Voltage | 4.5 V and 4.75 V options |
| Voltage Tolerance | 5% or 10% selectable |
| Strobe Timeout | 150 ms, 600 ms, or 1.2 sec options |
| Reset Output | Active High Logic Output |
| Reset Inverse Output | Open-drain output |
| Push-Button Reset | Debounced input, ignores pulses < 1 ms, responds to pulses > 20 ms |
| RoHS Compliance | Yes |
Key Features
- Pin-compatible with MAX1232 and Dallas DS1232
- Adjustable precision voltage monitor with 4.5 V and 4.75 V options
- Adjustable strobe monitor with 150 ms, 600 ms, or 1.2 sec options
- No external components required
- Push-button reset input with internal debounce circuit
- Watchdog timer to detect microprocessor lock-up
- Specified from -40°C to +85°C
Applications
- Microprocessor systems
- Portable equipment
- Computers
- Controllers
- Intelligent instruments
- Automotive systems
Q & A
- What is the ADM1232ARNZ used for? The ADM1232ARNZ is used as a microprocessor supervisory circuit to monitor and protect microprocessor systems from various failure conditions.
- What are the package options for the ADM1232ARNZ? The ADM1232ARNZ is available in 8-lead MSOP, 8-lead PDIP, 16-lead wide SOIC, and 8-lead narrow SOIC packages.
- What are the voltage monitoring options for the ADM1232ARNZ? The component can monitor supply voltages of 4.5 V and 4.75 V with selectable tolerance of 5% or 10%.
- How does the strobe timeout work? The strobe timeout can be set to 150 ms, 600 ms, or 1.2 seconds to monitor the activity of the microprocessor.
- Does the ADM1232ARNZ have a push-button reset feature? Yes, it has a debounced push-button reset input that ignores pulses less than 1 ms and responds to pulses greater than 20 ms.
- Is the ADM1232ARNZ RoHS compliant? Yes, the ADM1232ARNZ is RoHS compliant.
- What is the temperature range for the ADM1232ARNZ? The component is specified to operate from -40°C to +85°C.
- What types of systems can the ADM1232ARNZ be used in? It can be used in microprocessor systems, portable equipment, computers, controllers, intelligent instruments, and automotive systems.
- Does the ADM1232ARNZ require external components? No, the ADM1232ARNZ does not require any external components.
- How does the watchdog timer function? The watchdog timer detects if the microprocessor has locked up and asserts a reset if no high-to-low transitions are detected within the set time period.
