Analog Devices Inc. ADM6319B31ARJZ-RL7

Overview

ADM6319B31ARJZ-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 3.08 V reset threshold (±2.5% over −40°C to +85°C), 20 ms minimum reset timeout, no watchdog timer, and operates down to VCC = 1 V. It ensures reliable power-on reset in embedded controllers and portable instrumentation.

For engineers reviewing the ADM6319B31ARJZ-RL7 datasheet, ADM6319B31ARJZ-RL7 pinout, ADM6319B31ARJZ-RL7 application, or ADM6319B31ARJZ-RL7 equivalent, key selection criteria include reset threshold accuracy, industrial temperature operation, manual reset input timing, dual active-low/active-high output staging, and SOT-23 footprint compatibility.

Technical Context

The ADM6319B31ARJZ-RL7 implements a precision bandgap-based voltage reference and comparator to monitor VCC against its factory-trimmed 3.08 V threshold. Its reset generator asserts both RESET and RESET outputs simultaneously for ≥20 ms after VCC rises above threshold or MR deasserts.

It includes an internal 52 kΩ pull-up on the MR input, supports 1 µs minimum MR pulse width, and guarantees valid logic levels on both reset outputs down to VCC = 1 V - enabling brownout detection and controlled restart in low-voltage microcontroller systems.

Key Specifications

Pinout & Package

ADM6319B31ARJZ-RL7 is housed in a 5-lead SOT-23 package (JEDEC MO-178-AA compliant), with 1.3 mm × 2.9 mm footprint and 1.15 mm height - suitable for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM6319B25ARJZ-R7 and TPS3808G33DBVR, the ADM6319B31ARJZ-RL7 offers precise 3.08 V threshold alignment with standard 3.3 V supplies, guaranteed dual-output timing coherence, and zero-component MR interface - reducing design risk in industrial and portable embedded systems.

Availability

ADM6319B31ARJZ-RL7 is available at Aetrix Electronics and suitable for microprocessor power monitoring, industrial controller supervision, and portable instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for ADM6319B31ARJZ-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 ADM63xx family was engineered specifically for reliable power-supply supervision in microprocessor-based systems, emphasizing precision threshold accuracy, low power, and robust noise immunity in harsh environments.

FAQ

What is the reset threshold voltage of the ADM6319B31ARJZ-RL7?

The ADM6319B31ARJZ-RL7 has a factory-trimmed reset threshold of 3.08 V, with ±2.5% tolerance over the full industrial temperature range (−40°C to +85°C). This value is confirmed in Table 5 of the Rev. I datasheet under Reset Threshold Number 31, and applies directly to the ADM6319B31ARJZ-RL7 variant.

Does the ADM6319B31ARJZ-RL7 include a watchdog timer?

No, the ADM6319B31ARJZ-RL7 does not include a watchdog timer. Per Table 1 and the Ordering Guide, the ADM6319 series is defined by "No Watchdog, Yes Manual Reset, Push-pull / Push-pull" output configuration. The 'B' suffix denotes 20 ms reset timeout, and absence of watchdog-related ordering codes (W/X/Y/Z) confirms this functionality is omitted.

What are the functions of Pins 1 and 3 on the ADM6319B31ARJZ-RL7?

Pin 1 is the active-low push-pull RESET output; Pin 3 is the active-high push-pull RESET output. Both are asserted simultaneously during power-on, brownout, or manual reset events, and deassert together after the 20 ms timeout. Their complementary logic states eliminate need for external inverters or level shifters in multi-rail systems.

What is the minimum pulse width required on the MR pin of the ADM6319B31ARJZ-RL7?

The MR input requires a minimum low pulse width of 1 µs to trigger a reset, as specified in Table 2 (test condition: MR Input Pulse Width) and confirmed in Figure 15 (Manual Reset Minimum Pulse Width vs. Temperature). This timing is guaranteed across the full −40°C to +85°C operating range.

Is the ADM6319B31ARJZ-RL7 RoHS compliant and what is its packaging format?

Yes, the ADM6319B31ARJZ-RL7 is RoHS compliant, indicated by the 'Z' suffix in the part number per Figure 22. It ships in a 3,000-piece tape-and-reel format ('RL7' = 3000 PIECE REEL), housed in a 5-lead SOT-23 package (RJ-5), with JEDEC MO-178-AA outline dimensions.