規格
| 屬性 | 價值 |
| Package | Tube,Tube |
| ProductStatus | Obsolete |
| Type | Battery Backup Circuit |
| NumberofVoltagesMonitored | 1 |
| Voltage-Threshold | 4.65V |
| Output | Push-Pull, Totem Pole |
| Reset | Active Low |
| ResetTimeout | 35ms Minimum |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Through Hole |
| Package/Case | 8-DIP (0.300, 7.62mm) |
概述
Description
ADM690AN is Analog Devices’ microprocessor reset/voltage supervisor IC. It monitors the system supply (Vcc) and, if the voltage is too low or during power-up, asserts a clean reset to the microcontroller or MPU. Key points:
- Provides a guaranteed power-on reset pulse and undervoltage reset when Vcc falls below a threshold.
- Outputs a reset signal (typically active-low) to hold the CPU in reset until the supply is stable.
- May include a manual/user reset input (to force a reset).
- Variants differ in threshold options and timing; check the datasheet for exact values and pinout.
- Commonly used in embedded systems to ensure proper startup and brown-out protection; implemented in small packages (e.g., 8-pin).
Note: For precise thresholds, timing, and package options, refer to the ADM690AN datasheet.
- Provides a guaranteed power-on reset pulse and undervoltage reset when Vcc falls below a threshold.
- Outputs a reset signal (typically active-low) to hold the CPU in reset until the supply is stable.
- May include a manual/user reset input (to force a reset).
- Variants differ in threshold options and timing; check the datasheet for exact values and pinout.
- Commonly used in embedded systems to ensure proper startup and brown-out protection; implemented in small packages (e.g., 8-pin).
Note: For precise thresholds, timing, and package options, refer to the ADM690AN datasheet.
Equivalent
Equivalents depend on reset threshold and watchdog features. Common alternatives:
- Maxim MAX690/MAX691
- TI TPS3700/TPS3800
- Microchip MCP1314/MCP1316
- On Semiconductor NCP301/NCP3800
- Analog Devices ADM706/ADM707
Choose a variant with the same supply range, reset threshold, and delay/watchdog behavior as ADM690AN.
- Maxim MAX690/MAX691
- TI TPS3700/TPS3800
- Microchip MCP1314/MCP1316
- On Semiconductor NCP301/NCP3800
- Analog Devices ADM706/ADM707
Choose a variant with the same supply range, reset threshold, and delay/watchdog behavior as ADM690AN.
Features
ADM690AN is an Analog Devices microprocessor reset/ watchdog supervisor. Key features:
- Monitors supply and provides a safe reset during power-up and brown-out events (POR).
- Includes an integrated watchdog timer to reset the CPU if the software does not “kick” it in time.
- Manual reset input for external hardware reset control.
- Reset output (typically active-low) to drive the processor reset line.
- Wide single-supply operation suitable for 2.7 V to 5.5 V systems.
- Available in an 8-pin package (DIP-8/SOIC-8) for a small footprint.
- Low quiescent current for power-sensitive applications.
- No external components required for basic reset/monitoring functionality.
Notes: exact timing, input/output pinout, and thermal range depend on the specific package variant and revision; consult the data sheet for precise electrical specifications.
- Monitors supply and provides a safe reset during power-up and brown-out events (POR).
- Includes an integrated watchdog timer to reset the CPU if the software does not “kick” it in time.
- Manual reset input for external hardware reset control.
- Reset output (typically active-low) to drive the processor reset line.
- Wide single-supply operation suitable for 2.7 V to 5.5 V systems.
- Available in an 8-pin package (DIP-8/SOIC-8) for a small footprint.
- Low quiescent current for power-sensitive applications.
- No external components required for basic reset/monitoring functionality.
Notes: exact timing, input/output pinout, and thermal range depend on the specific package variant and revision; consult the data sheet for precise electrical specifications.
Pinout
- Pin count: 8 pins (DIP-8/SO-8)
- Function: Microprocessor supervisor with watchdog. Monitors supply voltage and watchdog input; asserts an active-low RESET output when Vcc is out of spec or the watchdog times out, ensuring proper MCU reset on power-up/power-down.
- Function: Microprocessor supervisor with watchdog. Monitors supply voltage and watchdog input; asserts an active-low RESET output when Vcc is out of spec or the watchdog times out, ensuring proper MCU reset on power-up/power-down.
Manufacturer
- Manufacturer: Analog Devices, Inc. (ADI).
- What kind of company: A multinational American semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits for various industries (industrial, automotive, communications, consumer).
- What kind of company: A multinational American semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits for various industries (industrial, automotive, communications, consumer).
Application
ADM690AN is a voltage supervisor and reset generator. It monitors Vcc and provides deterministic reset signals to a microprocessor, microcontroller, DSP or other logic. Applications include:
- Power-on/reset/brown-out protection in embedded systems
- Watchdog-style monitoring of CPU activity with a manual reset input
- Deterministic reset timing for data acquisition/instrumentation
- Single-supply embedded and portable devices
- Consumer electronics, telecom and industrial control equipment requiring reliable reset control
- Power-on/reset/brown-out protection in embedded systems
- Watchdog-style monitoring of CPU activity with a manual reset input
- Deterministic reset timing for data acquisition/instrumentation
- Single-supply embedded and portable devices
- Consumer electronics, telecom and industrial control equipment requiring reliable reset control
Package
ADM690AN comes in an 8-pin plastic DIP (PDIP) package.
