Analog Devices Inc. ADM13307-25ARZ-RL7

Overview

ADM13307-25ARZ-RL7 from Analog Devices is a triple voltage supervisor IC designed to monitor three independent supply rails-specifically 3.3 V (SENSE1), 2.5 V (SENSE2), and an adjustable 1.25 V reference (SENSE3)-in microprocessor and DSP systems. It features push-pull active-high and active-low RESET outputs, 140 ms minimum reset timeout, operation from 2.0 V to 5.5 V VDD, and −40°C to +85°C temperature range. Used in industrial control units requiring reliable power-on reset sequencing.

For engineers reviewing the ADM13307-25ARZ-RL7 datasheet, ADM13307-25ARZ-RL7 pinout, ADM13307-25ARZ-RL7 application, or ADM13307-25ARZ-RL7 equivalent, key selection criteria include fixed 2.5 V and 3.3 V thresholds with one adjustable 1.25 V input, low 40 μA supply current, VDD ≥ 1.1 V reset assertion, and SOIC_N package compatibility for space-constrained embedded designs.

Technical Context

The ADM13307-25ARZ-RL7 implements three independent undervoltage detection channels with pretrimmed internal thresholds: SENSE1 = 2.93 V (for 3.3 V rail), SENSE2 = 2.25 V (for 2.5 V rail), and SENSE3 = 1.25 V (adjustable via external resistor divider). Each channel includes hysteresis (20 mV at 2.25 V, 30 mV at 2.93 V) and supports glitch-immune sensing with ≥6 μs minimum pulse width.

It integrates dual push-pull reset outputs (RESET active low, RESET active high), a manual reset (MR) input with 100 ns minimum pulse width, and a reset timeout timer with 140–280 ms delay. The device asserts RESET during power-up when VDD ≥ 1.1 V and maintains reset until all sensed voltages exceed their rising thresholds and the timeout expires.

Key Specifications

Pinout & Package

ADM13307-25ARZ-RL7 is housed in an 8-lead narrow-body SOIC (SOIC_N, package code R-8), JEDEC MS-012-AA compliant, with 1.27 mm lead pitch and 5.00 mm × 4.00 mm body dimensions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar triple-supervisor applications.

Compared with MAX6816TPA+T and TPS3808G33DBVR, ADM13307-25ARZ-RL7 delivers integrated triple-rail supervision with dual-polarity outputs and adjustable reference in a single SOIC-8, reducing PCB area by >60% and eliminating inter-device timing skew in multi-processor reset coordination.

Availability

ADM13307-25ARZ-RL7 is available at Aetrix Electronics and suitable for industrial automation controllers, medical handheld diagnostics, and wireless infrastructure equipment requiring stable component supply and long-term manufacturability.

Supply support for ADM13307-25ARZ-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 ADM13307 family was developed to address demand for compact, low-power triple-supervisor solutions in space-constrained DSP and microcontroller systems where multi-rail sequencing and reliability are critical.

FAQ

What is the exact function of SENSE3 in ADM13307-25ARZ-RL7?

SENSE3 in ADM13307-25ARZ-RL7 accepts the internal 1.25 V reference and is designed for external resistor-divider configuration to monitor custom voltage rails (e.g., 1.0 V, 1.8 V). Unlike SENSE1 and SENSE2, which have fixed thresholds, SENSE3 enables flexible supervision of non-standard supplies while maintaining the same hysteresis and timing behavior as the other channels. This functionality is confirmed in the Ordering Guide and General Description sections of the ADM13307-25ARZ-RL7 datasheet.

Does ADM13307-25ARZ-RL7 support simultaneous reset assertion from all three sense inputs?

Yes, ADM13307-25ARZ-RL7 asserts RESET and RESET whenever any of SENSE1, SENSE2, or SENSE3 falls below its respective falling threshold (VIT−), regardless of the state of the other inputs. The Functional Truth Table (Table 7) confirms that RESET goes low if any SENSEv input is low (0), and remains low until all three inputs exceed their rising thresholds and the 140 ms timeout completes. This behavior is intrinsic to the device's logic architecture and applies identically across all ADM13307 variants.

Can ADM13307-25ARZ-RL7 operate with VDD = 1.8 V?

No, ADM13307-25ARZ-RL7 requires VDD ≥ 2.0 V per the Absolute Maximum Ratings and Operating Specifications tables. At 1.8 V, the internal comparators and reset timer do not function reliably; the Power-Up Reset Voltage specification states RESET becomes active only when VDD ≥ 1.1 V, but full operational compliance begins at 2.0 V. Attempting operation below 2.0 V may result in undefined output states or failure to assert reset during undervoltage events.

What is the maximum sink/source current capability of the RESET and RESET outputs in ADM13307-25ARZ-RL7?

The RESET (active-low) output can sink up to 3 mA at VDD = 5.5 V (VOL = 0.4 V), and the RESET (active-high) output can source up to 3 mA at VDD = 5.5 V (VOH = VDD − 0.4 V), as specified in Table 1 under "Low Level Output Voltage" and "High Level Output Voltage." These drive strengths are sufficient to directly interface with standard CMOS inputs and most microcontroller reset pins without external buffering.

Is ADM13307-25ARZ-RL7 RoHS compliant and lead-free?

Yes, ADM13307-25ARZ-RL7 is RoHS compliant and lead-free. The "Z" suffix in the part number (per the Ordering Guide footnote 1) explicitly denotes RoHS-compliant packaging. The device meets EU Directive 2011/65/EU and is manufactured using lead-free solderable terminations, with JEDEC-standard SOIC_N (R-8) packaging fully compliant with IPC/JEDEC J-STD-609A Class 3 marking requirements.