Analog Devices Inc. ADM6316CY46ARJ-RL7

Overview

ADM6316CY46ARJ-RL7 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 4.63 V reset threshold (±2.5% over −40°C to +85°C), 140 ms minimum reset timeout, and 1.6 s typical watchdog timeout, operating in a 5-lead SOT-23 package with push-pull active-low RESET output.

For engineers reviewing the ADM6316CY46ARJ-RL7 datasheet, ADM6316CY46ARJ-RL7 pinout, ADM6316CY46ARJ-RL7 application, or ADM6316CY46ARJ-RL7 equivalent, key selection considerations include its guaranteed reset validity down to VCC = 1 V, power supply glitch immunity, low 5 µA supply current at 3.6 V, and industrial temperature range suitability for embedded control and portable systems.

Technical Context

The ADM6316CY46ARJ-RL7 implements a precision bandgap-based reset threshold detector with 40 ppm/°C temperature coefficient and 3 mV hysteresis, paired with a digitally timed watchdog circuit cleared by logic transitions on WDI. Its reset generator asserts active-low output for ≥140 ms after VCC rises above 4.63 V or MR deasserts.

This variant includes manual reset input (MR) with 52 kΩ internal pull-up and 100 ns glitch rejection, and watchdog input (WDI) accepting 50 ns minimum pulses with 120–160 µA input current depending on logic level - all while maintaining guaranteed operation across VCC = 1 V to 5.5 V.

Key Specifications

Pinout & Package

ADM6316CY46ARJ-RL7 is housed in a JEDEC-compliant 5-lead SOT-23 (RJ-5) package with 0.95 mm lead pitch and 2.80–3.00 mm body length. Pin 1 is RESET (active-low push-pull), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is WDI (watchdog input), and Pin 5 is VCC (monitored supply).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT46D3+ and TPS3808G33DBVR, ADM6316CY46ARJ-RL7 uniquely combines 4.63 V threshold, 140 ms reset timeout, 1.6 s watchdog, and push-pull output in a single 5-pin SOT-23 - eliminating external components while supporting both brownout and code-execution failure recovery in 5 V microprocessor systems.

Availability

ADM6316CY46ARJ-RL7 is available at Aetrix Electronics and suitable for industrial control, portable medical devices, automotive body electronics, and smart metering applications requiring stable component supply and long-term lifecycle support.

Supply support for ADM6316CY46ARJ-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.

The ADM6316 family was engineered specifically for microprocessor-based systems needing deterministic power-on reset, brownout protection, and watchdog-based firmware fault recovery - targeting industrial, computing, and portable equipment markets.

FAQ

What is the exact reset threshold voltage of the ADM6316CY46ARJ-RL7 and how does it vary with temperature?

The ADM6316CY46ARJ-RL7 has a nominal reset threshold of 4.63 V at +25°C, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). Its temperature coefficient is 40 ppm/°C, resulting in a maximum deviation of approximately ±11.6 mV across the operating range - verified per Table 2 and Figure 9 in the Rev. I datasheet.

Does the ADM6316CY46ARJ-RL7 require an external pull-up resistor on the RESET pin?

No, the ADM6316CY46ARJ-RL7 features a push-pull active-low RESET output, so no external pull-up resistor is required. The output actively drives low during reset and high during normal operation, unlike open-drain variants such as ADM6320. This simplifies PCB layout and reduces BOM count.

How does the manual reset (MR) input behave when left unconnected on the ADM6316CY46ARJ-RL7?

When left unconnected, the MR input on ADM6316CY46ARJ-RL7 is pulled high internally by a 52 kΩ resistor, keeping the device in normal operation. No external pull-up is needed. A momentary low pulse ≥1 µs on MR will assert RESET for the full 140 ms timeout period, enabling push-button recovery without debounce circuitry.

What is the watchdog timeout behavior of the ADM6316CY46ARJ-RL7 and how is it cleared?

The ADM6316CY46ARJ-RL7 has a typical watchdog timeout of 1.6 s. It is cleared by any logic transition (low-to-high or high-to-low) on the WDI pin, with minimum pulse width of 50 ns. The timer also resets automatically when VCC falls below 4.63 V or when MR is asserted - ensuring coordinated recovery across power and software faults.

Can the ADM6316CY46ARJ-RL7 operate reliably at VCC = 1.2 V, and what is the RESET output voltage under that condition?

Yes, the ADM6316CY46ARJ-RL7 guarantees valid RESET output down to VCC = 1 V. At VCC = 1.2 V with ISINK = 100 µA, the RESET output voltage is specified at ≤0.3 V (logic low), and at ISOURCE = 150 µA, it reaches ≥0.8 × VCC (≥0.96 V, logic high) - confirming functional reset signaling even during deep brownout.