Analog Devices Inc. ADM8616ZCYAKSZ-RL7

Overview

ADM8616ZCYAKSZ-RL7 from Analog Devices is a low-voltage supervisory circuit with integrated watchdog timer in 4-lead SC70 package, designed to monitor VCC supply voltage and detect microprocessor code execution faults. It features a 2.32 V reset threshold, 140 ms reset timeout, 1.6 s watchdog timeout, push-pull active-low RESET output, and guaranteed operation down to VCC = 1 V - used in portable microcontroller systems requiring reliable power-on reset and fail-safe recovery.

For engineers reviewing the ADM8616ZCYAKSZ-RL7 datasheet, ADM8616ZCYAKSZ-RL7 pinout, ADM8616ZCYAKSZ-RL7 application, or ADM8616ZCYAKSZ-RL7 equivalent, key selection criteria include reset threshold accuracy (±1.5% over temperature), watchdog pulse immunity (50 ns minimum WDI transition width), glitch rejection for fast transients, and compatibility with 1.8 V–5 V logic domains in space-constrained embedded designs.

Technical Context

The ADM8616ZCYAKSZ-RL7 implements a precision bandgap-based voltage reference with 40 ppm/°C temperature coefficient and 2×VTH hysteresis to prevent oscillation during brownout conditions. Its internal watchdog timer clears on any WDI logic transition (low-to-high or high-to-low) and asserts RESET if no transition occurs within 1.6 s.

RESET generation is dual-triggered: undervoltage detection below 2.32 V (with 4.6 mV hysteresis) or watchdog timeout. 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, enabling direct interface with 1.8 V, 3.3 V, and 5 V microcontrollers without external pull-ups.

Key Specifications

Pinout & Package

ADM8616ZCYAKSZ-RL7 is housed in a 4-lead SC70 (KS-4) package measuring 2.2 mm × 1.35 mm × 0.9 mm, optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT23D3+ and TPS3808G125DBVR, the ADM8616ZCYAKSZ-RL7 uniquely combines precise 2.32 V threshold, integrated 1.6 s watchdog, push-pull output, and 5 µA quiescent current in SC70 - making it optimal for battery-powered microcontrollers needing both voltage and code-execution supervision in minimal footprint.

Availability

ADM8616ZCYAKSZ-RL7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical wearable sensor hubs, automotive cabin controllers, smart home edge nodes, and portable instrumentation requiring stable component supply across extended product lifecycles.

Supply support for ADM8616ZCYAKSZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving industrial, automotive, communications, and healthcare markets.

The ADM8616/ADM8617 family was engineered for microprocessor-based systems needing compact, low-power, dual-function supervision - combining precision voltage monitoring and watchdog timer functionality in a single 4-pin SC70 device.

FAQ

What is the exact reset threshold voltage of the ADM8616ZCYAKSZ-RL7?

The ADM8616ZCYAKSZ-RL7 has a nominal reset threshold of 2.32 V, with a guaranteed range of 2.25 V to 2.38 V at +25°C and ±1.5% variation over −40°C to +85°C. This value is laser-trimmed during production and specified in Table 1 of the Rev. C datasheet under the "ADM861xZ" row for reset threshold voltage.

Does the ADM8616ZCYAKSZ-RL7 require an external pull-up resistor on the RESET pin?

No, the ADM8616ZCYAKSZ-RL7 does not require an external pull-up resistor because it features a push-pull active-low RESET output. The internal driver actively pulls the pin low during reset assertion and drives it high (to ≥0.8×VCC) when deasserted - enabling direct connection to microcontroller nRST inputs without additional components.

How is the watchdog timeout configured on the ADM8616ZCYAKSZ-RL7?

The watchdog timeout on the ADM8616ZCYAKSZ-RL7 is factory-configured to 1.6 seconds (typical), as indicated by the "Y" suffix in the ordering code. It cannot be adjusted externally; the timer resets on any logic transition (low-to-high or high-to-low) at the WDI pin and asserts RESET if no transition occurs within the fixed 1.6 s period.

Can the ADM8616ZCYAKSZ-RL7 operate reliably at VCC = 1.2 V?

Yes, the ADM8616ZCYAKSZ-RL7 is fully functional and guarantees valid RESET output states down to VCC = 1 V. At 1.2 V, the push-pull output delivers VOL ≤ 0.3 V (at 50 µA sink) and VOH ≥ 0.8×VCC, satisfying logic-level requirements for ultra-low-voltage microcontrollers such as the MSP430FR series.

What package type and marking code does the ADM8616ZCYAKSZ-RL7 use?

The ADM8616ZCYAKSZ-RL7 uses a 4-lead SC70 package (EIAJ SC82 / Analog Devices KS-4 outline), with physical dimensions of 2.2 mm × 1.35 mm × 0.9 mm. Its top-side marking code is "N0F", as confirmed in the Ordering Guide table on page 10 of the Rev. C datasheet.