Analog Devices Inc. ADM6305D3ARJZ1-RL7

Overview

ADM6305D3ARJZ1-RL7 from Analog Devices is a dual-input programmable supervisory IC designed to monitor two independent voltage rails and generate an active-low open-drain reset signal for microprocessor systems. It features 0.4 V adjustable reset thresholds on both RST IN1 and RST IN2 inputs, 140 ms minimum reset timeout, 5 µA typical supply current, and operates across −40°C to +125°C - enabling use in battery-powered industrial controllers.

For engineers reviewing the ADM6305D3ARJZ1-RL7 datasheet, ADM6305D3ARJZ1-RL7 pinout, ADM6305D3ARJZ1-RL7 application, or ADM6305D3ARJZ1-RL7 equivalent, key selection considerations include its dual 0.4 V threshold configuration, SOT-23-5 package compatibility, reset timeout stability over temperature, and low-power operation in multivoltage embedded systems.

Technical Context

The ADM6305D3ARJZ1-RL7 implements two independent high-impedance (±25 nA) comparator inputs with fixed 0.4 V thresholds, each capable of monitoring separate supply rails via external resistor dividers. Its reset generator asserts RESET low when either input falls below threshold and holds it for 140 ms (min) after both inputs recover.

VCC is unmonitored power supply input; RESET output remains valid down to VCC = 0.9 V and uses open-drain topology with guaranteed VOL ≤ 0.3 V at ISINK = 500 µA. No internal hysteresis exists on 0.4 V inputs - instead, a time-based glitch filter rejects transients ≤ 0.1 µs.

Key Specifications

Pinout & Package

ADM6305D3ARJZ1-RL7 is housed in a RoHS-compliant 5-lead SOT-23 (RJ-5) package with JEDEC MO-178-AA outline dimensions: 2.90 mm × 1.60 mm × 1.15 mm, 10° lead angle, and C2 pin 1 orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply supervisory applications.

Compared with ADM6305D3ARJZ-RL7, the ADM6305D3ARJZ1-RL7 enables lower-voltage rail supervision without external components, while TPS3808G33DBVR offers lower ICC but cannot replace dual-rail functionality - making ADM6305D3ARJZ1-RL7 uniquely suited for compact multivoltage systems requiring 0.4 V threshold precision.

Availability

ADM6305D3ARJZ1-RL7 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical wearables, smart energy meters, and battery-operated microprocessor systems requiring stable component supply across extended temperature ranges.

Supply support for ADM6305D3ARJZ1-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 ADM6305 family delivers dual-rail voltage supervision with programmable thresholds and fixed timeouts, engineered specifically for space- and power-constrained microprocessor-based systems in industrial, automotive, and portable applications.

FAQ

What is the exact reset threshold voltage for each input on ADM6305D3ARJZ1-RL7?

The ADM6305D3ARJZ1-RL7 has a confirmed 0.40 V ±1% reset threshold on both RST IN1 and RST IN2 inputs across −40°C to +125°C. This value is factory-set and does not require external calibration; typical deviation is ±0.004 V at 25°C, tightening to ±0.01 V over full temperature range per datasheet Table 1.

Does ADM6305D3ARJZ1-RL7 monitor its own VCC supply?

No, ADM6305D3ARJZ1-RL7 does not monitor VCC. The VCC pin serves only as the unmonitored power supply input; reset assertion depends solely on RST IN1 and RST IN2 voltages falling below their 0.4 V thresholds. Valid RESET output is guaranteed as long as VCC remains ≥0.9 V.

What is the minimum reset timeout period specified for ADM6305D3ARJZ1-RL7?

The ADM6305D3ARJZ1-RL7 has a minimum reset timeout period of 140 ms, with typical value 200 ms and maximum 280 ms over −40°C to +125°C (per Table 7). This timeout begins after both monitored inputs rise above threshold and ensures reliable system initialization before processor release.

Can ADM6305D3ARJZ1-RL7 be used with a 1.2 V supply rail without external resistors?

No - the 0.4 V threshold requires external resistor dividers to scale higher supply voltages. For a 1.2 V rail, use R1 = 2×R2 (e.g., 200 kΩ + 100 kΩ) to present 0.4 V to RST IN1. Direct connection of 1.2 V would permanently assert RESET since 1.2 V > 0.4 V threshold.

Is the RESET output of ADM6305D3ARJZ1-RL7 compatible with 1.8 V microcontrollers?

Yes - the open-drain RESET output of ADM6305D3ARJZ1-RL7 supports mixed-voltage interfaces. When pulled up to 1.8 V, VOL remains ≤0.3 V at ISINK = 500 µA (per Table 1), satisfying 1.8 V logic low requirements. No level-shifting circuitry is needed.