Analog Devices Inc. ADM6316CY29ARJZ-R7

Overview

ADM6316CY29ARJZ-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 2.93 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 operates down to VCC = 1 V - used in embedded controllers requiring reliable brownout recovery and fail-safe restart.

For engineers reviewing the ADM6316CY29ARJZ-R7 datasheet, ADM6316CY29ARJZ-R7 pinout, ADM6316CY29ARJZ-R7 application, or ADM6316CY29ARJZ-R7 equivalent, key selection criteria include reset threshold accuracy at temperature extremes, guaranteed reset validity below 1.2 V, watchdog pulse width tolerance (50 ns min), MR input glitch rejection (100 ns), and compatibility with 5-lead SOT-23 PCB footprints.

Technical Context

The ADM6316CY29ARJZ-R7 implements a precision bandgap-based voltage reference with 40 ppm/°C temperature coefficient and 3 mV hysteresis to ensure stable reset assertion during VCC transients. Its watchdog detector clears on any logic transition (low-to-high or high-to-low) on WDI, supporting robust software supervision without requiring precise timing margins.

Reset generation combines three independent triggers: undervoltage detection (VCC < 2.93 V), manual reset assertion (MR low ≥1 µs), and watchdog timeout (1.6 s typical). The push-pull RESET output drives low to ≤0.3 V at 1.2 mA sink current (VCC ≥ 2.7 V) and high to ≥0.8×VCC at 500 µA source current, ensuring TTL/CMOS compatibility across its 1 V–5.5 V operating range.

Key Specifications

Pinout & Package

ADM6316CY29ARJZ-R7 is housed in a RoHS-compliant 5-lead SOT-23 package (JEDEC MO-178-AA), measuring 2.90 mm × 1.60 mm × 1.15 mm, with gull-wing leads and 0.95 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT29D3+ and TPS3808G33DBVR, the ADM6316CY29ARJZ-R7 uniquely combines 2.93 V precision reset, integrated watchdog with 1.6 s timeout, manual reset input with internal pull-up, and guaranteed operation down to 1 V - making it optimal for compact, self-contained fail-safe supervision in resource-constrained embedded systems.

Availability

ADM6316CY29ARJZ-R7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, automotive body control modules, and smart energy meters requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for ADM6316CY29ARJZ-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, with design centers worldwide and a legacy of precision power management innovation.

The ADM63xx family was engineered specifically for robust microprocessor supervision in harsh environments - delivering guaranteed reset validity at ultra-low VCC, high noise immunity, and flexible watchdog/manual reset configuration for industrial, medical, and automotive applications.

FAQ

What is the exact reset threshold voltage of ADM6316CY29ARJZ-R7 and how does it vary with temperature?

The ADM6316CY29ARJZ-R7 has a nominal reset threshold of 2.93 V at +25°C, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). Its temperature coefficient is 40 ppm/°C, meaning threshold drift is bounded and predictable - for example, at −40°C it remains within 2.857 V to 3.000 V, enabling accurate brownout margining in thermal cycling applications.

Does ADM6316CY29ARJZ-R7 require external components to operate, and if so, which ones?

The ADM6316CY29ARJZ-R7 operates autonomously with no external components required for basic function: its MR pin includes a 52 kΩ internal pull-up, WDI is disabled when floating, and RESET is push-pull. However, an optional 0.1 µF bypass capacitor on VCC improves transient immunity, and a 100 kΩ pull-down on RESET may extend valid output down to VCC = 0 V in ultra-low-power designs.

How does the watchdog timer in ADM6316CY29ARJZ-R7 respond to microcontroller failures, and what is its timeout behavior?

The ADM6316CY29ARJZ-R7 watchdog timer resets the microcontroller if no logic transition occurs on WDI for 1.6 s (typical). It clears on every edge (low-to-high or high-to-low), tolerating pulses as short as 50 ns. If the MCU freezes mid-instruction or enters an infinite loop without toggling WDI, the timer expires and asserts RESET - returning the system to a known state without external intervention.

Can ADM6316CY29ARJZ-R7 be used in systems with supply voltages below 2.93 V, and what happens to reset output behavior?

Yes - the ADM6316CY29ARJZ-R7 operates from VCC = 1 V to 5.5 V and guarantees valid RESET output down to 1 V. Below 2.93 V, RESET is asserted low; above 2.93 V, it deasserts after the 140 ms timeout. Even at VCC = 1.1 V, RESET sinks ≤0.3 V at 50 µA, ensuring compatible logic levels for low-voltage MCUs like ARM Cortex-M0+ running at 1.2 V core.

What packaging and environmental specifications apply to ADM6316CY29ARJZ-R7?

ADM6316CY29ARJZ-R7 is supplied in a RoHS-compliant 5-lead SOT-23 package (JEDEC MO-178-AA), rated for −40°C to +85°C operation. It features 270°C/W thermal impedance, 300°C maximum soldering temperature (10 sec), and ESD protection per JEDEC JS-001 (HBM >2 kV). The "R7" suffix denotes 3,000-piece tape-and-reel packaging with lead-free finish.