Analog Devices Inc. ADM8616MCYAKSZ-RL7

Overview

ADM8616MCYAKSZ-RL7 from Analog Devices is a low-voltage supervisory circuit with integrated watchdog timer, designed to monitor VCC supply integrity and microprocessor code execution in embedded systems. It features a 4.38 V reset threshold, 140 ms reset timeout, 1.6 s watchdog timeout, push-pull active-low RESET output, and operates across −40°C to +85°C in portable microcontroller applications.

For engineers reviewing the ADM8616MCYAKSZ-RL7 datasheet, ADM8616MCYAKSZ-RL7 pinout, ADM8616MCYAKSZ-RL7 application, or ADM8616MCYAKSZ-RL7 equivalent, key selection criteria include reset threshold accuracy (±130 mV), guaranteed RESET validity down to VCC = 1 V, glitch-immune transient rejection, and SC70 package compatibility for space-constrained PCB layouts.

Technical Context

The ADM8616MCYAKSZ-RL7 implements a precision bandgap reference-based voltage detector with 40 ppm/°C temperature coefficient and 2×VTH hysteresis, ensuring stable reset assertion during brownout recovery. Its watchdog timer clears on any WDI logic transition (≥50 ns pulse width) and supports three timeout options-here configured for 1.6 s typical-enabling robust detection of firmware hangs.

RESET generation follows dual triggers: undervoltage on VCC below 4.38 V (with 140 ms minimum timeout after VCC rise), or WDI inactivity beyond watchdog period. The push-pull output drives low to ≤0.3 V at 1.2 mA sink current (VCC ≥ 2.7 V) and high to ≥0.8×VCC, eliminating external pull-up requirements.

Key Specifications

Pinout & Package

ADM8616MCYAKSZ-RL7 is housed in a 4-lead SC70 (KS-4) package measuring 2.20 mm × 1.35 mm × 0.90 mm, optimized for high-density portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM8616MCYAKSZ-RL7, MAX6326UT43D3+ offers identical reset timing but omits watchdog supervision, while TPS3808G33DBVR provides lower quiescent current tolerance but fails to meet the required 4.38 V threshold and lacks hardware watchdog capability-making both unsuitable drop-in replacements.

Availability

ADM8616MCYAKSZ-RL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, and automotive body control modules requiring stable component supply with guaranteed long-term availability.

Supply support for ADM8616MCYAKSZ-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, communications, automotive, and healthcare markets.

The ADM8616/ADM8617 product line delivers precision voltage supervision and hardware watchdog protection for microprocessor-based systems where reliability under brownout, noise, and firmware failure is critical.

FAQ

What is the exact reset threshold voltage of ADM8616MCYAKSZ-RL7?

The ADM8616MCYAKSZ-RL7 has a nominal reset threshold of 4.38 V, with a guaranteed range of 4.25 V (min) to 4.50 V (max) over temperature. This value is laser-trimmed during production and specified in Table 1 of the Rev. C datasheet under the "ADM861xM" designation, confirming its suitability for monitoring 3.3 V systems with adequate noise margin.

Does ADM8616MCYAKSZ-RL7 support watchdog functionality, and what is its timeout setting?

Yes, ADM8616MCYAKSZ-RL7 includes a hardware watchdog timer with a 1.6 s typical timeout period (suffix "Y" per ordering guide). The timer resets on any WDI pin transition and asserts RESET if unattended beyond this interval. This configuration is verified in the Ordering Guide entry for ADM8616MCYAKSZ-RL7 and Figure 6's normalized timing characterization.

What is the RESET output structure of ADM8616MCYAKSZ-RL7, and why does it matter?

ADM8616MCYAKSZ-RL7 features a push-pull active-low RESET output, unlike the open-drain variant ADM8617. This means it actively drives both high and low states without requiring an external pull-up resistor. As confirmed in the Functional Block Diagram and Pin Function Descriptions, this simplifies PCB layout and improves noise immunity in high-speed digital systems.

Can ADM8616MCYAKSZ-RL7 operate reliably at very low supply voltages?

Yes, ADM8616MCYAKSZ-RL7 guarantees valid RESET output behavior down to VCC = 1 V, as explicitly stated in the General Description and Specifications table. Its push-pull output maintains VOL ≤ 0.3 V at 1.2 mA sink current even at VCC = 2.7 V, enabling safe microcontroller reset sequencing during deep brownout conditions.

What package type and footprint does ADM8616MCYAKSZ-RL7 use?

ADM8616MCYAKSZ-RL7 uses a 4-lead SC70 package (package code KS-4), with dimensions of 2.20 mm × 1.35 mm × 0.90 mm. This is confirmed in the Outline Dimensions section (Figure 16) and Ordering Guide, and matches the "CYAKSZ" suffix indicating SC70 packaging and RoHS compliance.