Analog Devices Inc. ADM6316AY27ARJZ-R7

Overview

ADM6316AY27ARJZ-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 2.7 V reset threshold, 1 ms minimum reset timeout, 1.6 sec typical watchdog timeout, push-pull active-low RESET output, and operates across −40°C to +85°C in 5-lead SOT-23. It is used in embedded controllers where reliable power-on reset and fault recovery are critical.

For engineers reviewing the ADM6316AY27ARJZ-R7 datasheet, ADM6316AY27ARJZ-R7 pinout, ADM6316AY27ARJZ-R7 application, or ADM6316AY27ARJZ-R7 equivalent, key selection considerations include its precise 2.7 V reset threshold tolerance (±2.5% over temperature), guaranteed reset validity down to VCC = 1 V, low 5 µA typical supply current at 3.6 V, glitch-immune MR input with 52 kΩ internal pull-up, and compatibility with microprocessor reset assertion timing requirements.

Technical Context

The ADM6316AY27ARJZ-R7 implements a precision bandgap-based voltage reference for reset threshold detection, with 40 ppm/°C temperature coefficient and 3 mV hysteresis. Its watchdog timer clears on any WDI logic transition (min. 50 ns pulse width) and times out after 1.6 sec (typical), supporting robust software fault detection in real-time systems.

Reset generation is triggered by VCC falling below 2.7 V (±2.5% over −40°C to +85°C), MR assertion, or watchdog timeout - with reset held active for ≥1 ms after VCC recovery. The push-pull active-low RESET output drives logic-low levels ≤0.3 V at 1.2 mA sink current (VCC ≥ 2.7 V), ensuring compatibility with standard CMOS microprocessor reset inputs.

Key Specifications

Pinout & Package

ADM6316AY27ARJZ-R7 is housed in a RoHS-compliant 5-lead SOT-23 (RJ-5) package per JEDEC MO-178-AA, with 0.95 mm lead pitch and 2.90 mm × 1.60 mm footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326T27D2+T and TPS3808G33DBVR, ADM6316AY27ARJZ-R7 uniquely combines 2.7 V precision reset, integrated watchdog with 1.6 sec timeout, manual reset input, and push-pull output - making it the only option among the three that satisfies concurrent brownout detection, software fault recovery, and direct MCU reset drive in space-constrained industrial designs.

Availability

ADM6316AY27ARJZ-R7 is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, smart energy meters, and automotive body control modules requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for ADM6316AY27ARJZ-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 and manufacturing expertise spanning precision sensing, power management, and reliability-critical ICs.

The ADM6316 family was engineered specifically for microprocessor-based systems needing robust power-supply supervision, watchdog-based fault recovery, and manual reset capability - targeting industrial, medical, and automotive applications demanding guaranteed reset timing and wide-temperature operation.

FAQ

What is the exact reset threshold voltage and tolerance for ADM6316AY27ARJZ-R7?

The ADM6316AY27ARJZ-R7 has a nominal reset threshold of 2.7 V, with a tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). At 25°C, the threshold is specified as 2.66 V to 2.74 V. This precision enables reliable brownout detection for 3.3 V or 2.8 V rails without margin violation, and the 40 ppm/°C temperature coefficient ensures stability across operating conditions.

Does ADM6316AY27ARJZ-R7 support manual reset, and how is the MR pin configured?

Yes, ADM6316AY27ARJZ-R7 includes a manual reset (MR) input on Pin 3. It is an active-low input with an internal 52 kΩ pull-up resistor, requiring a ≥1 µs low pulse to assert reset. The MR pin rejects fast glitches (<100 ns), and its threshold scales with VCC (0.3×VCC to 0.7×VCC for VTH < 4.0 V), ensuring compatibility across supply voltages. No external components are needed for basic push-button implementation.

What is the watchdog timeout behavior of ADM6316AY27ARJZ-R7, and how is it cleared?

The ADM6316AY27ARJZ-R7 features a typical watchdog timeout of 1.6 sec (suffix Y), cleared by any logic transition (low-to-high or high-to-low) on the WDI pin (Pin 4) with minimum pulse width of 50 ns. The timer also resets automatically upon VCC undervoltage or MR assertion. Leaving WDI floating disables the watchdog function entirely, allowing flexible use in systems where software strobing is not required.

Can ADM6316AY27ARJZ-R7 operate reliably at very low supply voltages?

Yes, ADM6316AY27ARJZ-R7 guarantees functional reset assertion down to VCC = 1 V, with the RESET output remaining valid (logic low ≤0.3 V at 1.2 mA sink) across this range. This enables safe operation during deep brownout events and battery depletion scenarios. Supply current remains low (≤20 µA at 5.5 V), supporting extended runtime in energy-constrained applications.

What package type and footprint does ADM6316AY27ARJZ-R7 use?

ADM6316AY27ARJZ-R7 uses a 5-lead SOT-23 package (JEDEC MO-178-AA, package code RJ-5), measuring 2.90 mm × 1.60 mm with 0.95 mm lead pitch. It is RoHS-compliant and supplied on a 3,000-piece tape-and-reel (R7). The pinout is standardized across the ADM6316 series: RESET (1), GND (2), MR (3), WDI (4), VCC (5), enabling drop-in layout reuse for other variants.