Analog Devices Inc. ADM6319C29ARJ-RL7

Overview

ADM6319C29ARJ-RL7 from Analog Devices is a supervisory circuit with manual reset and dual push-pull reset outputs, designed for microprocessor supply voltage monitoring. It features a 2.93 V reset threshold (±2.5% over −40°C to +85°C), 140 ms minimum reset timeout, guaranteed reset validity down to VCC = 1 V, and 5 µA typical supply current at 3.6 V. It is used in portable controllers where reliable power-on reset and user-initiated recovery are required.

For engineers reviewing the ADM6319C29ARJ-RL7 datasheet, ADM6319C29ARJ-RL7 pinout, ADM6319C29ARJ-RL7 application, or ADM6319C29ARJ-RL7 equivalent, key selection criteria include reset threshold accuracy, industrial temperature operation, dual active-low/active-high output capability, manual reset input with internal 52 kΩ pull-up, and SOT-23-5 package compatibility with space-constrained embedded designs.

Technical Context

The ADM6319C29ARJ-RL7 implements a precision bandgap-based voltage reference and comparator to monitor VCC against a fixed 2.93 V threshold, with ±2.5% tolerance across −40°C to +85°C and 40 ppm/°C temperature coefficient. Its dual push-pull RESET and RESET outputs are asserted simultaneously during undervoltage, manual reset assertion, or after reset timeout expiration.

Unlike watchdog-equipped variants, ADM6319 lacks WDI functionality and relies solely on VCC monitoring and MR input for reset generation. Its manual reset input accepts pulses ≥1 µs, includes integrated debounce and 100 ns glitch rejection, and features an internal 52 kΩ pull-up resistor - eliminating external components in basic push-button implementations.

Key Specifications

Pinout & Package

ADM6319C29ARJ-RL7 is housed in a 5-lead SOT-23 (RJ-5) package per JEDEC MO-178-AA, with 0.95 mm lead pitch and 2.8–3.0 mm body length. The package supports reflow soldering and is RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326T29D2+T and TPS3808G33DBVR, ADM6319C29ARJ-RL7 uniquely delivers dual-polarity push-pull reset outputs without external components, enabling direct interface to heterogeneous reset architectures while maintaining ultra-low power and precise 2.93 V threshold accuracy across industrial temperature range.

Availability

ADM6319C29ARJ-RL7 is available at Aetrix Electronics and suitable for industrial controller monitoring, portable medical instrument reset, smart energy meter power sequencing, and automotive body control module subsystems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for ADM6319C29ARJ-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, with design centers worldwide and a legacy of precision power management innovation since 1965.

The ADM63xx family was engineered specifically for microprocessor-based systems requiring robust, low-power supply supervision with flexible reset output configurations - targeting industrial automation, portable instrumentation, and automotive electronics where reliability under voltage stress is non-negotiable.

FAQ

What is the exact reset threshold voltage of ADM6319C29ARJ-RL7 and how does it vary with temperature?

The ADM6319C29ARJ-RL7 has a nominal reset threshold of 2.93 V, with ±2.5% tolerance over the full industrial temperature range (−40°C to +85°C). Its temperature coefficient is 40 ppm/°C, meaning the threshold shifts by approximately ±0.012 V across the operating range. This specification ensures consistent brownout detection in 3.3 V systems even under thermal stress, and is validated per Table 5 and Table 2 in the Rev. I datasheet.

Does ADM6319C29ARJ-RL7 include a watchdog timer function?

No, ADM6319C29ARJ-RL7 does not include a watchdog timer. Per Table 1 and the Ordering Guide, ADM6319 is explicitly defined as the "No Watchdog, Yes Manual Reset, Push-pull/Push-pull" variant. Its functionality is limited to VCC monitoring, manual reset input (MR), and dual push-pull reset outputs - making it ideal for applications where code execution integrity is managed externally or not required.

What are the electrical characteristics of the MR input on ADM6319C29ARJ-RL7?

The MR input on ADM6319C29ARJ-RL7 is an active-low signal with an internal 52 kΩ pull-up resistor, threshold levels of 0.3×VCC (min) and 0.7×VCC (max) when VTH < 4.0 V, and a minimum pulse width requirement of 1 µs. It features 100 ns glitch rejection and debounced response, allowing direct connection to a momentary switch without external RC filtering - verified in Figure 11 and Table 4 of the datasheet.

Can ADM6319C29ARJ-RL7 operate reliably below 1.8 V supply voltage?

Yes, ADM6319C29ARJ-RL7 is fully specified to operate down to VCC = 1 V, with guaranteed reset output validity (both RESET and RESET) across that range. Its supply current remains stable at ~7 µA at 1.5 V (Figure 7), and reset assertion is maintained even during deep brownout - a key differentiator for battery-depleted portable devices where other supervisors fail to assert reset cleanly.

What is the package type and lead finish for ADM6319C29ARJ-RL7?

ADM6319C29ARJ-RL7 uses a 5-lead SOT-23 package (JEDEC MO-178-AA, Analog Devices package code RJ-5), with lead finish compliant to RoHS Directive 2011/65/EU. The "RL7" suffix indicates a 3,000-piece tape-and-reel packaging format, and the device is marked "N0S" on the top surface per the Ordering Guide on page 13 of the Rev. I datasheet.