Analog Devices Inc. ADM6823ZYRJZ-RL7

Overview

ADM6823ZYRJZ-RL7 from Analog Devices is a precision low-voltage supervisory circuit with integrated watchdog timer and manual reset input, designed for microprocessor supply monitoring. It features a 2.32 V reset threshold, 140 ms minimum reset timeout, 1.6 sec typical watchdog timeout, push-pull active-low RESET output, and operates across −40°C to +125°C in portable and industrial control systems.

For engineers reviewing the ADM6823ZYRJZ-RL7 datasheet, ADM6823ZYRJZ-RL7 pinout, ADM6823ZYRJZ-RL7 application, or ADM6823ZYRJZ-RL7 equivalent, this device delivers guaranteed reset validity down to VCC = 1 V, low 7 μA quiescent current, power supply glitch immunity, and precise voltage supervision for reliable system boot and runtime integrity.

Technical Context

The ADM6823ZYRJZ-RL7 implements a fixed-threshold voltage monitor with internal reference (2.32 V ±1.5%), a monostable watchdog timer cleared by logic transitions on WDI, and a debounced manual reset input with 50 kΩ internal pull-up. Its reset generator asserts RESET when VCC falls below VTH, MR is pulled low, or WDI remains static beyond 1.6 sec.

It uses a push-pull active-low RESET output stage capable of sourcing up to 800 μA and sinking up to 3.2 mA, with VOL ≤ 0.4 V at ISINK = 3.2 mA (VCC ≥ 4.25 V) and VOH ≥ 0.8 × VCC at ISOURCE = 800 μA (VCC ≥ 4.75 V), ensuring robust interface with diverse microprocessor reset inputs.

Key Specifications

Pinout & Package

ADM6823ZYRJZ-RL7 is housed in a lead-free 5-lead SOT-23 package (JEDEC MO-178-AA, RJ-5), with 1.30 mm max height and 2.80 mm × 1.60 mm footprint - compatible with standard SMT assembly processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar supervisory circuit applications.

Compared with MAX6326T23+T and TPS3808G33DBVR, the ADM6823ZYRJZ-RL7 uniquely combines 2.32 V precision threshold, integrated watchdog timer, manual reset input, and push-pull output in a single 5-lead SOT-23 - delivering full supervisory functionality without external components or layout changes.

Availability

ADM6823ZYRJZ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply, long-lifecycle support, and guaranteed performance across extended temperature ranges.

Supply support for ADM6823ZYRJZ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADM682x family was developed specifically for microprocessor-based systems needing reliable power-on reset, brownout protection, and watchdog-based runtime fault recovery - targeting space-constrained, low-power, and high-reliability embedded applications.

FAQ

What is the exact reset threshold voltage of the ADM6823ZYRJZ-RL7?

The ADM6823ZYRJZ-RL7 has a nominal reset threshold voltage of 2.32 V, with a tolerance of ±1.5% over temperature and a temperature coefficient of 60 ppm/°C. This value is confirmed in Table 2 of the Rev. 0 datasheet under the "ADM682xZ" row and is laser-trimmed at wafer test to ensure precision without external calibration.

Does the ADM6823ZYRJZ-RL7 support manual reset functionality?

Yes, the ADM6823ZYRJZ-RL7 includes a dedicated manual reset (MR) input on Pin 3. It is an active-low input with an internal 50 kΩ pull-up resistor, accepts pulses as short as 1 μs, and features on-chip debounce to reject transients under 100 ns - enabling direct connection to a push-button switch without external components.

What is the watchdog timeout period for the ADM6823ZYRJZ-RL7?

The ADM6823ZYRJZ-RL7 features a fixed watchdog timeout period of 1.6 seconds (typical), with a specified range of 1.12 sec to 2.40 sec across temperature and supply voltage. The timer is cleared on any logic transition (low-to-high or high-to-low) at the WDI pin, and it is automatically disabled if WDI is left floating.

Can the ADM6823ZYRJZ-RL7 operate reliably at VCC = 1.2 V?

Yes, the ADM6823ZYRJZ-RL7 guarantees valid RESET output operation down to VCC = 1 V. At VCC = 1.2 V, the push-pull RESET output maintains VOL ≤ 0.3 V (ISINK = 100 μA) and VOH ≥ 0.8 × VCC (ISOURCE = 100 μA), ensuring interoperability with low-voltage microcontrollers even during deep brownout conditions.

What package type and lead finish does the ADM6823ZYRJZ-RL7 use?

The ADM6823ZYRJZ-RL7 uses a 5-lead SOT-23 package (JEDEC MO-178-AA, package code RJ-5) with lead-free (RoHS-compliant) terminations (denoted by "Z" in the part number). It ships on a 3,000-piece tape-and-reel (RL7) and features a 1.30 mm maximum package height for compact PCB layouts.