Analog Devices Inc. ADM1815-R22AKSZ-RL

Overview

ADM1815-R22AKSZ-RL from Analog Devices is an active-low, open-drain microprocessor reset circuit with internal pull-up resistor, designed to monitor 2.18 V (typical) supply voltage in low-voltage embedded systems. It delivers a 150 ms reset timeout after power-up, sinks up to 8 mA at V_OUT = 0.4 V, and operates across −40°C to +105°C for industrial-grade reliability in microcontroller-based power management.

For engineers reviewing the ADM1815-R22AKSZ-RL datasheet, ADM1815-R22AKSZ-RL pinout, ADM1815-R22AKSZ-RL application, or ADM1815-R22AKSZ-RL equivalent, this page provides verified specifications, SC70 package details, functional block context, real-world use cases, and two validated alternative parts for 2.18 V threshold monitoring in space-constrained designs.

Technical Context

The ADM1815-R22AKSZ-RL implements a precision voltage comparator with built-in hysteresis and a fixed 150 ms power-up delay timer. Its reset assertion is triggered when V_CC falls below 2.12–2.25 V (min–max), and it maintains reset for ≥100 ms after V_CC rises above threshold.

This device belongs to the ADM1815/ADM1816/ADM1817/ADM1818 family of open-drain reset monitors with internal pull-up resistors (5.5 kΩ typical). Unlike push-pull variants, it requires no external pull-up and supports manual reset via push-button connection between RST and GND.

Key Specifications

Pinout & Package

ADM1815-R22AKSZ-RL is housed in a 3-lead SC70 (KS-3) package - compact, surface-mount, JEDEC-compliant, with 0.65 mm lead pitch and coplanarity ≤0.10 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM1815-R22AKSZ-RL, ADM1816-R22AKSZ-RL offers identical functionality and form factor, while TPS3808G12DBVR trades push-button capability and internal pull-up for lower current and higher threshold accuracy - making the former ideal for direct replacements and the latter better suited for new ultra-low-I_Q designs.

Availability

ADM1815-R22AKSZ-RL is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and portable medical devices requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.

Supply support for ADM1815-R22AKSZ-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 engineered specifically for robust, low-cost power supply monitoring in microprocessor-based systems - emphasizing precision threshold stability, minimal external components, and wide temperature operation.

FAQ

What is the exact reset threshold voltage for ADM1815-R22AKSZ-RL?

The ADM1815-R22AKSZ-RL has a guaranteed reset threshold range of 2.12 V (minimum) to 2.25 V (maximum), with 2.18 V typical at 25°C. This specification applies across the full operating temperature range of −40°C to +105°C and is validated per Analog Devices' Rev. F datasheet Table 1.

Does ADM1815-R22AKSZ-RL require an external pull-up resistor?

No. ADM1815-R22AKSZ-RL integrates a 3.1–7.5 kΩ internal pull-up resistor on its open-drain RST pin, eliminating the need for an external component. This simplifies design, reduces BOM count, and saves PCB area - confirmed in the "INTERNAL PULL-UP RESISTOR" section of the datasheet.

Can ADM1815-R22AKSZ-RL be used with a manual reset button?

Yes. ADM1815-R22AKSZ-RL supports manual reset: connecting a push-button between RST and GND pulls the output low, and upon release, the device holds RST low for 100–250 ms (typical 150 ms). This behavior is explicitly documented in the "ADM1813 AND ADM1818" section and Figure 12 timing diagram.

What package type is used for ADM1815-R22AKSZ-RL?

ADM1815-R22AKSZ-RL uses the SC70-3 (KS-3) package - a 3-lead, thin shrink small-outline transistor package measuring 2.00 mm × 1.25 mm with 0.65 mm lead pitch. Package dimensions and JEDEC compliance are detailed in Figure 16 and Page 8 of the Rev. F datasheet.

How does ADM1815-R22AKSZ-RL behave during power-down?

During V_CC falling edge, ADM1815-R22AKSZ-RL asserts reset within 10 µs after crossing the threshold (Table 1). It remains asserted until V_CC rises above the threshold and sustains a 100–250 ms timeout - ensuring clean reset initiation and preventing premature release during supply collapse.