Analog Devices Inc. ADM6316CY26ARJZ-R7

Overview

ADM6316CY26ARJZ-R7 from Analog Devices is a supervisory circuit with integrated watchdog timer and manual reset input, designed for microprocessor supply voltage monitoring and code execution integrity assurance. It features a 2.63 V reset threshold (±2.5% over −40°C to +85°C), 140 ms minimum reset timeout, 1.6 s typical watchdog timeout, push-pull active-low RESET output, and consumes ≤12 µA at 3.6 V. It is used in embedded controllers where reliable power-on reset and fail-safe recovery from software lockup are required.

For engineers reviewing the ADM6316CY26ARJZ-R7 datasheet, ADM6316CY26ARJZ-R7 pinout, ADM6316CY26ARJZ-R7 application, or ADM6316CY26ARJZ-R7 equivalent, key selection criteria include reset threshold accuracy across temperature, guaranteed RESET validity down to VCC = 1 V, glitch-immune MR input with internal 52 kΩ pull-up, and compatibility with low-power portable systems requiring stable brownout detection and watchdog supervision.

Technical Context

The ADM6316CY26ARJZ-R7 implements a precision bandgap-based voltage reference for reset threshold generation, with 40 ppm/°C temperature coefficient and 3 mV hysteresis. Its watchdog detector clears on any WDI logic transition (≥50 ns pulse width) and times out after 1.6 s (typical), resetting the host microprocessor if unattended.

Reset assertion occurs when VCC falls below 2.63 V, when MR is pulled low ≥1 µs, or when WDI remains static beyond watchdog timeout. The push-pull RESET output drives low to ≤0.3 V (at ISINK = 1.2 mA, VCC ≥ 2.7 V) and high to ≥0.8 × VCC (at ISOURCE = 500 µA, VCC ≥ 2.7 V), ensuring valid logic levels across its 1 V to 5.5 V operating range.

Key Specifications

Pinout & Package

ADM6316CY26ARJZ-R7 is housed in a 5-lead SOT-23 (RJ-5) package per JEDEC MO-178-AA, with 0.95 mm lead pitch and 2.80–3.00 mm body length.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT26+T and TPS3808G33DBVR, ADM6316CY26ARJZ-R7 uniquely combines adjustable 2.63 V threshold, integrated watchdog with 1.6 s timeout, and push-pull RESET in a single 5-lead SOT-23-enabling compact, self-contained supervision without external components or trade-offs in fault coverage.

Availability

ADM6316CY26ARJZ-R7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, and automotive body control modules requiring stable component supply with guaranteed long-term availability.

Supply support for ADM6316CY26ARJZ-R7 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.

The ADM6316 family was engineered specifically for robust microprocessor supervision in harsh environments, delivering precision voltage monitoring, glitch-immune reset generation, and configurable watchdog protection in minimal footprint packages.

FAQ

What is the exact reset threshold voltage of ADM6316CY26ARJZ-R7 and how does it vary with temperature?

The ADM6316CY26ARJZ-R7 has a nominal reset threshold of 2.63 V at +25°C, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). Its temperature coefficient is specified at 40 ppm/°C, meaning the threshold drifts predictably with ambient changes-e.g., a 40°C rise causes ~4.2 mV shift-ensuring consistent brownout detection across operating conditions without calibration.

Does ADM6316CY26ARJZ-R7 require external components to function as a complete supervisor?

No, ADM6316CY26ARJZ-R7 operates autonomously with no external components required: it includes an internal 52 kΩ pull-up on MR, a precision voltage reference, and a push-pull RESET output. Only VCC decoupling (recommended 0.1 µF ceramic) and optional MR debounce capacitor (0.1 µF) are suggested-no resistors, capacitors, or diodes are mandatory for basic supervision or watchdog operation.

How does the watchdog timer in ADM6316CY26ARJZ-R7 respond to MCU software failures?

The ADM6316CY26ARJZ-R7 watchdog timer resets the MCU if the WDI pin remains static (high or low) for >1.6 s (typical). It clears on every logic transition-even 50 ns pulses-so a stuck loop that fails to toggle WDI will trigger reset. Unlike simple timers, it also clears during VCC undervoltage or MR assertion, ensuring coordinated recovery across all fault modes.

Can ADM6316CY26ARJZ-R7 assert a valid reset signal when VCC drops below 2.0 V?

Yes, ADM6316CY26ARJZ-R7 guarantees valid RESET output down to VCC = 1 V: the push-pull stage drives low to ≤0.3 V (at ISINK = 1.2 mA) and high to ≥0.8 × VCC (at ISOURCE = 500 µA) even at 1 V supply. This ensures deterministic reset assertion during deep brownout-critical for preserving register state and avoiding undefined MCU behavior before power collapse.

What is the MR input behavior during power-up and noise exposure?

The MR input of ADM6316CY26ARJZ-R7 features an internal 52 kΩ pull-up, ensuring it defaults high at power-up-no external resistor needed. It rejects fast transients <100 ns (typical) and requires ≥1 µs low pulse to trigger reset. An external 0.1 µF capacitor between MR and GND further suppresses EMI, making it robust in electrically noisy industrial or automotive environments.