ADM6819ARJZ-REEL7

Overview

The ADM6819ARJZ-REEL7 is a voltage sequencer and supervisory circuit manufactured by Analog Devices Inc. It operates within a supply voltage range of 0.9 V to 5.5 V, with a typical operating current of 350 µA. The device features two monitored inputs and an NFET driver output type. It includes a fixed reset delay time of 200 ms and utilizes an adjustable overvoltage threshold. The component is housed in a SOT-23-6 package and supports surface mount installation. It functions without manual reset or watchdog timer capabilities.

Feature Summary

• Monitors main power via internal comparator and enables external N-channel FETs through integrated charge pump gate drive
• Provides fixed 200 ms timeout delay for secondary power sequencing when both primary and secondary voltages are valid
• Supports cascading multiple units for controlling more than two power rails in complex multi-voltage systems

Applications

• Multi-voltage system power sequencing
• Dual voltage microprocessor, FPGA, ASIC, and DSP initialization
• Telecommunications and data communication equipment
• Personal computer and server power management

Procurement Notes

Verify the specific suffix REEL7 corresponds to the required tape and reel packaging configuration for automated assembly lines. Confirm that the SOT-23-6 footprint matches the target PCB design constraints. Ensure the fixed 200 ms delay aligns with system startup timing requirements, as this parameter cannot be adjusted externally unlike the ADM6820 variant.

Selection Notes

Select this component when a fixed delay sequence is sufficient for dual-rail power-up scenarios. It is suitable for applications requiring low quiescent current and compact SOT-23-6 packaging. Consider the ADM6820 if capacitor-adjustable delay times are necessary instead of the fixed 200 ms interval provided by this model.

Part Context

This part belongs to the ADM6819/ADM6820 family of simple power sequencers designed for enhancing N-channel MOSFETs. These devices monitor a primary supply voltage and control the enable/disable state of secondary supplies. The series is pin-compatible with older MAX6819/MAX6820 designs, facilitating direct upgrades in existing hardware architectures while offering improved integration in small packages.

Replacement Considerations

Public confirmed substitute part numbers include ADM6820ARJZ-REEL7 for adjustable delay variants, and legacy compatible parts such as MAX6819UTM+T.