Analog Devices Inc. ADM1815-R23ARTZ-RL

Overview

ADM1815-R23ARTZ-RL from Analog Devices is a precision active-low microprocessor reset circuit in SOT-23 package, monitoring 2.31 V (typical) supply voltage with 150 ms reset timeout, ±1.5% trip accuracy over −40°C to +105°C, and 9–16 µA quiescent current - used for safe power-on initialization in industrial microcontroller systems.

For engineers reviewing the ADM1815-R23ARTZ-RL datasheet, ADM1815-R23ARTZ-RL pinout, ADM1815-R23ARTZ-RL application, or ADM1815-R23ARTZ-RL equivalent, key selection criteria include reset threshold tolerance, push-pull output drive capability, temperature-stable delay timing, and RoHS-compliant SOT-23 footprint compatibility with space-constrained embedded designs.

Technical Context

The ADM1815-R23ARTZ-RL implements a bandgap-based voltage reference with comparator hysteresis and internal 150 ms power-up delay timer. Its active-low push-pull output drives microprocessor RESET inputs directly without external pull-up resistors.

It operates across 1.2 V to 5.5 V supply range, supports full industrial temperature operation (−40°C to +105°C), and features guaranteed reset assertion during brownout conditions with 10 µs response on VCC fall and 150 ms typical timeout on VCC rise.

Key Specifications

Pinout & Package

ADM1815-R23ARTZ-RL is housed in a 3-lead SOT-23 (RT-3) package, 2.90 mm × 1.30 mm × 1.02 mm, JEDEC TO-236-AB compliant, with gull-wing leads and 0.95 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage monitor reset applications.

Compared with MAX6326-L23T and TPS3808G125DBVR, ADM1815-R23ARTZ-RL delivers tighter threshold accuracy, lower quiescent current, and true push-pull output - enabling simpler, more robust reset control in high-reliability industrial and automotive applications without external components.

Availability

ADM1815-R23ARTZ-RL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply with full industrial temperature support and RoHS compliance.

Supply support for ADM1815-R23ARTZ-RL 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 ADM181x series was designed specifically for cost-sensitive, space-constrained microprocessor reset applications demanding precision voltage monitoring and guaranteed power-on reset timing across harsh environments.

FAQ

What is the exact reset threshold voltage for ADM1815-R23ARTZ-RL?

The ADM1815-R23ARTZ-RL has a nominal reset threshold of 2.31 V (typical), with guaranteed limits of 2.25 V (min) and 2.37 V (max) over −40°C to +105°C, as specified in Table 1 of the Rev. F datasheet. This precise trip point targets 2.5 V supply rails where early brownout detection is critical.

Does ADM1815-R23ARTZ-RL require an external pull-up resistor on the RST pin?

No. ADM1815-R23ARTZ-RL features an active-low push-pull output stage, meaning its RST pin can both sink up to 8 mA and source 350 µA - eliminating the need for any external pull-up resistor and enabling direct connection to standard microprocessor RESET inputs.

What is the power-up reset timeout duration of ADM1815-R23ARTZ-RL?

The ADM1815-R23ARTZ-RL guarantees a minimum reset timeout of 100 ms and a typical value of 150 ms after VCC rises above the threshold, with a maximum of 250 ms. This fixed internal timer ensures consistent power supply stabilization time before releasing the reset signal.

Is ADM1815-R23ARTZ-RL compatible with 3.3 V microcontrollers?

Yes. Although ADM1815-R23ARTZ-RL monitors a 2.31 V supply, its RST output is fully compatible with 3.3 V logic systems: the push-pull structure drives low to <0.4 V and high to VCC − 0.1 V, satisfying standard 3.3 V CMOS input thresholds across its 1.2 V–5.5 V operating range.

What package type and lead finish does ADM1815-R23ARTZ-RL use?

ADM1815-R23ARTZ-RL uses the 3-lead SOT-23 (RT-3) package with gull-wing leads and is RoHS-compliant (Z-suffix), featuring lead-free, halogen-free terminations per EU Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1.