Diodes Incorporated APX803L-47SA-7

Overview

APX803L-47SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring V_CC supply integrity in battery-powered and low-power digital systems. It features a fixed 4.7V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms built-in recovery delay - enabling reliable power-on reset and brownout protection in portable instrumentation and embedded controllers.

For engineers reviewing the APX803L-47SA-7 datasheet, APX803L-47SA-7 pinout, APX803L-47SA-7 application, or APX803L-47SA-7 equivalent, this device serves as a precision, ultra-low-quiescent-current reset supervisor with validated SOT23-3 packaging, confirmed timing behavior across -40°C to +85°C, and direct compatibility with 1.8V–5.5V logic interfaces requiring fast (<20µs) reset assertion.

Technical Context

The APX803L-47SA-7 implements a precision bandgap-based voltage reference and comparator architecture to detect when V_CC falls below 4.7V ±1.5%, triggering an open-drain active-low RESET signal within 20µs. Its internal hysteresis (0.01×V_TH) prevents oscillation during slow-rising or noisy supply transitions.

It integrates a fixed 220ms timeout period after V_CC recovers above threshold before releasing RESET, eliminating external RC timing components. The device operates from 0.9V to 5.5V supply and supports sink currents up to 20mA on the RESET pin at V_OL ≤ 0.4V (I_SINK = 3.5mA).

Key Specifications

Pinout & Package

SOT23-3 package: 3-pin, small-outline transistor outline with gull-wing leads; JEDEC MS-012AC compliant; thermal resistance θ_JA = 200°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803E47DBZR and MAX809SEUR+T, the APX803L-47SA-7 delivers optimal balance of ultra-low ICC (1µA), production-proven hysteresis (0.01×V_TH), and industrial-grade temperature support - making it ideal for cost-sensitive, battery-constrained designs where long-term reliability outweighs marginal accuracy gains.

Availability

APX803L-47SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and automotive body control units requiring stable component supply across multi-year production cycles.

Supply support for APX803L-47SA-7 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.

The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power supervisory functions in battery-operated and energy-conscious embedded systems.

FAQ

What is the exact reset threshold voltage for APX803L-47SA-7?

The APX803L-47SA-7 has a factory-trimmed detection threshold of 4.7V with ±1.5% accuracy over temperature (–40°C to +85°C), corresponding to a min/max range of 4.63V to 4.77V at +25°C. This value is fixed internally and not adjustable via external components.

Can APX803L-47SA-7 operate with a 1.8V supply rail?

No - the APX803L-47SA-7 requires V_CC ≥ 0.9V to function, but its 4.7V threshold is intended for monitoring higher-voltage rails (e.g., 5V systems). To supervise a 1.8V rail, a resistive divider must be used to scale the monitored voltage to match the 4.7V input range, ensuring divider current remains negligible versus the 1µA ICC.

Is an external pull-up resistor required on the RESET pin?

Yes - the RESET pin is open-drain and active-low, so an external pull-up resistor to the host logic rail (e.g., 3.3V or 5V) is mandatory. Typical values range from 10kΩ to 100kΩ; lower values improve noise immunity but increase static current, while higher values reduce current but may slow rise time on long traces.

Does APX803L-47SA-7 support AEC-Q100 qualification?

The APX803L-47SA-7 itself is not AEC-Q100 qualified; however, Diodes Incorporated offers automotive-grade variants (e.g., APX803L-47SA-7Q) in the same SOT23-3 package with PPAP documentation, AEC-Q100 Grade 2 stress testing, and IATF 16949 manufacturing certification - contact Aetrix for qualified part numbers and qualification reports.