Analog Devices Inc. ADM6319C46ARJ-RL7

Overview

ADM6319C46ARJ-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 4.63 V reset threshold (±2.5% over −40°C to +85°C), 140 ms minimum reset timeout, no watchdog timer, and operates from 1 V to 5.5 V supply. It ensures reliable power-on reset in embedded controllers and portable instrumentation.

For engineers reviewing the ADM6319C46ARJ-RL7 datasheet, ADM6319C46ARJ-RL7 pinout, ADM6319C46ARJ-RL7 application, or ADM6319C46ARJ-RL7 equivalent, key selection criteria include reset threshold accuracy, dual active-low/active-high output capability, industrial temperature operation, SOT-23 footprint compatibility, and absence of watchdog functionality for simplified timing-critical systems.

Technical Context

The ADM6319C46ARJ-RL7 implements a precision bandgap-based voltage reference and comparator to monitor VCC against a factory-trimmed 4.63 V threshold. Its dual push-pull RESET/RESET outputs are guaranteed valid down to VCC = 1 V, with logic-low output voltage ≤0.3 V at 1.2 mA sink current and logic-high output voltage ≥0.8 × VCC at 500 µA source current.

It includes an internal 52 kΩ pull-up on the MR input, accepts 1 µs minimum manual reset pulses, and provides 100 ns glitch rejection on MR. The device lacks watchdog circuitry-confirmed by ordering code "C46" (no W/X/Y/Z suffix) and Table 1 showing ADM6319 as "No" for Watchdog-and supports only manual and power-fail reset assertion.

Key Specifications

Pinout & Package

ADM6319C46ARJ-RL7 is housed in a 5-lead SOT-23 (RJ-5) package per JEDEC MO-178-AA, with 0.95 mm lead pitch and 2.90 mm × 1.60 mm body dimensions. Pin 1 is marked by a dot or beveled edge.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM6319C46ARJ-RL7, the ADM6319C29ARJZ-RL7 offers identical supervision architecture but targets lower-voltage rails, while the MAX6326UR29+T reduces functionality to single open-drain output-making it less suitable for systems requiring simultaneous active-low and active-high reset signaling without added components.

Availability

ADM6319C46ARJ-RL7 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, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADM6319C46ARJ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The ADM63xx family was engineered for microprocessor-based systems requiring reliable power-on reset, brownout protection, and manual recovery-targeting industrial automation, portable instrumentation, and automotive electronics where deterministic reset behavior is safety-critical.

FAQ

What is the reset threshold voltage of the ADM6319C46ARJ-RL7?

The ADM6319C46ARJ-RL7 has a factory-trimmed reset threshold of 4.63 V, with tolerance of ±2.5% over the full industrial temperature range (−40°C to +85°C). This value is confirmed in Table 5 of the datasheet and corresponds to ordering code "C46", where "46" maps to 4.63 V. The threshold is referenced to the monitored VCC supply and remains stable across temperature and supply variations.

Does the ADM6319C46ARJ-RL7 include a watchdog timer?

No, the ADM6319C46ARJ-RL7 does not include a watchdog timer. Per Table 1 in the datasheet, the ADM6319 variant is explicitly designated as "No" for Watchdog. The ordering code "C46ARJ-RL7" contains no W/X/Y/Z suffix-only "C" (140 ms reset timeout) and "46" (4.63 V threshold)-further confirming absence of watchdog functionality. This distinguishes it from ADM6316/ADM6317/ADM6318 variants.

What are the functions of the two reset outputs on the ADM6319C46ARJ-RL7?

The ADM6319C46ARJ-RL7 provides two independent push-pull reset outputs: pin 1 (RESET) is active-low, and pin 3 (RESET) is active-high. Both assert simultaneously when VCC falls below 4.63 V, when MR is pulled low, or during the 140 ms reset timeout period. Each output meets specified sink/source drive strength down to VCC = 1 V, enabling direct interface to MCUs requiring either polarity without external logic.

What is the purpose of the MR pin on the ADM6319C46ARJ-RL7?

The MR (Manual Reset) pin on the ADM6319C46ARJ-RL7 is an active-low input with an internal 52 kΩ pull-up resistor. Driving MR low for ≥1 µs forces both RESET outputs into their active states, regardless of VCC level. This enables user-initiated system reset via a momentary switch to ground. The pin includes 100 ns glitch rejection and on-chip debounce, eliminating need for external filtering components in most implementations.

What package type and footprint does the ADM6319C46ARJ-RL7 use?

The ADM6319C46ARJ-RL7 uses a 5-lead SOT-23 package (JEDEC MO-178-AA, package code RJ-5), with 0.95 mm lead pitch and overall dimensions of 2.90 mm × 1.60 mm × 1.15 mm. Pin 1 is identified by a dot or beveled edge. This compact, surface-mount package supports automated assembly and is compatible with standard SOT-23 footprints used across Analog Devices' supervisory product line.