Overview
The ADM708AN is a microprocessor supervisory circuit produced by Analog Devices Inc. This component is designed to monitor the power supply status and ensure the proper functioning of microprocessors in various electronic systems. It is part of the ADM708 series and is available in an 8-lead Plastic Dual In-Line Package (PDIP-8).
The ADM708AN is known for its high reliability and multifunctional capabilities, making it an excellent choice for a wide range of electronic projects, including microprocessor systems, computers, controllers, and intelligent instruments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Type | Voltage Supervisory | |
| Package / Case | PDIP-8 | |
| Number of Inputs Monitored | 1 Input | |
| Output Type | Active Low, Push-Pull | |
| Manual Reset | Manual Reset | |
| Watchdog Timers | No Watchdog | |
| Battery Backup Switching | No Backup | |
| Supply Voltage - Max | 5.5 V | V |
| Minimum Operating Temperature | -40°C | °C |
| Maximum Operating Temperature | +85°C | °C |
| Reset Delay Time | 280 ms | ms |
| Operating Supply Current | 250 µA | µA |
| Overvoltage Threshold | 4.5 V | V |
| Undervoltage Threshold | 4.25 V | V |
| Power Fail Detection | Yes | |
| Height | 3.43 mm | mm |
| Length | 9.27 mm | mm |
| Width | 7.24 mm | mm |
| Unit Weight | 0.032805 oz | oz |
Key Features
- Voltage Monitoring: The ADM708AN monitors the power supply voltage and provides a reset signal if the voltage falls below the specified threshold (4.40 V for ADM708AN).
- Manual Reset Input: It features a debounced TTL/CMOS manual reset input (MR) that can be driven from TTL, CMOS logic, or a manual reset switch.
- Power-Fail Detection: The component includes a power-fail input (PFI) and output (PFO) for detecting low battery or power-fail conditions.
- Active High Reset Output: The ADM708AN provides an active high reset output, which is operational even when VCC is as low as 1 V.
- Operating Temperature Range: It operates over a temperature range of -40°C to +85°C, making it suitable for various environmental conditions.
Applications
- Microprocessor Systems: Ideal for monitoring the power supply in microprocessor-based systems to ensure reliable operation.
- Computers and Controllers: Used in computer systems, controllers, and other electronic devices that require power supply monitoring.
- Intelligent Instruments: Suitable for intelligent instruments and critical microprocessor supply monitoring applications.
- Automotive Systems: Can be used in automotive systems where reliable power supply monitoring is crucial.
Q & A
- What is the primary function of the ADM708AN?
The primary function of the ADM708AN is to monitor the power supply status and provide a reset signal if the voltage falls below the specified threshold.
- What is the package type of the ADM708AN?
The ADM708AN is available in an 8-lead Plastic Dual In-Line Package (PDIP-8).
- What is the operating temperature range of the ADM708AN?
The operating temperature range of the ADM708AN is -40°C to +85°C.
- Does the ADM708AN have a watchdog timer function?
No, the ADM708AN does not have a watchdog timer function. Instead, it provides an active high reset output.
- What is the reset delay time of the ADM708AN?
The reset delay time of the ADM708AN is 280 ms.
- How does the manual reset input work on the ADM708AN?
The manual reset input (MR) is debounced and can be driven from TTL, CMOS logic, or a manual reset switch. It generates a reset signal when taken below 0.8 V.
- What is the power-fail detection mechanism in the ADM708AN?
The ADM708AN includes a power-fail input (PFI) and output (PFO) for detecting low battery or power-fail conditions. PFO goes low when PFI is less than 1.25 V.
- What is the maximum operating supply voltage for the ADM708AN?
The maximum operating supply voltage for the ADM708AN is 5.5 V.
- What is the typical operating supply current of the ADM708AN?
The typical operating supply current of the ADM708AN is 250 µA.
- In what types of systems is the ADM708AN commonly used?
The ADM708AN is commonly used in microprocessor systems, computers, controllers, intelligent instruments, and automotive systems.
