Analog Devices Inc. ADM8616YCYAKSZ-RL7

Overview

ADM8616YCYAKSZ-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 2.19 V reset threshold, 140 ms reset timeout, 1.6 s watchdog timeout, push-pull active-low RESET output, and operates from 1 V to 5.5 V with 5 µA typical supply current. It is used in portable microprocessor systems requiring reliable power-on reset and fault recovery.

For engineers reviewing the ADM8616YCYAKSZ-RL7 datasheet, ADM8616YCYAKSZ-RL7 pinout, ADM8616YCYAKSZ-RL7 application, or ADM8616YCYAKSZ-RL7 equivalent, key selection criteria include reset threshold accuracy (±1.5% over temperature), guaranteed RESET validity down to VCC = 1 V, glitch-immune transient rejection, watchdog pulse width tolerance (50 ns min), and SC70 package compatibility for space-constrained designs.

Technical Context

The ADM8616YCYAKSZ-RL7 implements a precision bandgap-based voltage reference with 40 ppm/°C temperature coefficient and 2×VTH hysteresis to ensure stable reset assertion/deassertion. Its watchdog detector clears on any WDI logic transition (low-to-high or high-to-low) and tolerates pulses as short as 50 ns.

RESET generation is triggered by either VCC falling below 2.19 V (with 4.4 mV hysteresis) or WDI inactivity exceeding 1.6 s. The push-pull output drives low to ≤0.3 V at 1.2 mA (VCC ≥ 2.7 V) and high to ≥0.8×VCC, enabling direct interface with CMOS inputs without pull-up resistors.

Key Specifications

Pinout & Package

ADM8616YCYAKSZ-RL7 is housed in a 4-lead SC70 (KS-4) package measuring 2.20 mm × 1.35 mm × 0.95 mm, optimized for high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT21-T and TPS3808G18DBVR, ADM8616YCYAKSZ-RL7 uniquely combines 2.19 V precision threshold, 140 ms reset hold, 1.6 s watchdog, and push-pull output in SC70 - making it optimal for compact, self-recovering 2.2 V embedded systems where both supply and code integrity must be enforced in hardware.

Availability

ADM8616YCYAKSZ-RL7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart energy meters, and automotive body control units requiring stable component supply and long-term lifecycle support.

Supply support for ADM8616YCYAKSZ-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 ultra-low-power, precision supervisory circuits with integrated watchdog timers for microprocessor-based systems where reliability, small footprint, and extended battery life are critical design requirements.

FAQ

What is the exact reset threshold voltage of ADM8616YCYAKSZ-RL7?

The ADM8616YCYAKSZ-RL7 has a nominal reset threshold of 2.19 V, with a guaranteed tolerance of ±1.5% over the −40°C to +85°C temperature range and a temperature coefficient of 40 ppm/°C. This value is confirmed in Table 1 of the Rev. C datasheet under the "ADM861xY" row, and corresponds to the "Y" suffix in the ordering code.

Does ADM8616YCYAKSZ-RL7 support watchdog functionality, and what is its timeout period?

Yes, ADM8616YCYAKSZ-RL7 includes a fully integrated watchdog timer with a nominal timeout period of 1.6 seconds, as specified by the "Y" suffix in the third position of its ordering code (ADM8616YCYAKSZ-RL7). The watchdog clears on any WDI pin transition and asserts RESET if no activity occurs within this period, providing hardware-level recovery from firmware lockup.

What is the RESET output configuration of ADM8616YCYAKSZ-RL7, and how does it affect system interfacing?

ADM8616YCYAKSZ-RL7 features a push-pull active-low RESET output, meaning it actively drives both logic low and logic high states without requiring an external pull-up resistor. This allows direct connection to CMOS inputs of microcontrollers, FPGAs, or ASICs, simplifying board layout and ensuring robust signal integrity across its full 1 V to 5.5 V operating range.

Can ADM8616YCYAKSZ-RL7 operate reliably during deep brownout conditions?

Yes, ADM8616YCYAKSZ-RL7 guarantees valid RESET output behavior down to VCC = 1 V, with VOL ≤ 0.3 V (at 1.2 mA sink) and VOH ≥ 0.8×VCC (at 500 µA source). This ensures deterministic reset signaling even during severe supply droop, supporting fail-safe shutdown and recovery in battery-backed or energy-harvesting systems.

What package type and dimensions does ADM8616YCYAKSZ-RL7 use, and is it RoHS compliant?

ADM8616YCYAKSZ-RL7 uses the 4-lead SC70 (KS-4) package, measuring 2.20 mm × 1.35 mm × 0.95 mm, with lead pitch of 0.65 mm. It is RoHS compliant, as indicated by the "Z" suffix in the part number, and qualified for standard Pb-free reflow soldering per JEDEC J-STD-020.