Diodes Incorporated AP1701EWL-7

Overview

AP1701EWL-7 from Diodes Incorporated is a 3-pin active-low microprocessor reset supervisor IC in SC59 package, featuring 2.93V reset threshold, 240ms minimum reset timeout, 20µA typical supply current, and guaranteed reset validity down to VCC = 1V. It monitors +3.0V digital power rails in embedded controllers and portable systems to prevent erroneous code execution during brownout or power-up.

For engineers reviewing the AP1701EWL-7 datasheet, AP1701EWL-7 pinout, AP1701EWL-7 application, or AP1701EWL-7 equivalent, key selection criteria include precise 2.93V threshold tolerance (±0.06V), push-pull output drive capability (1.2mA sink), immunity to sub-100µs VCC transients, and lead-free SC59-3L packaging compliant with RoHS Directive Annex Notes 5 and 7.

Technical Context

The AP1701EWL-7 implements a precision bandgap-based voltage comparator with 30 ppm/°C tempco and internal 240ms delay timer. Its push-pull RESET output asserts low when VCC drops below 2.93V and holds for ≥240ms after VCC recovers above threshold.

Designed for single-supply operation from 1.0V to 5.5V, it guarantees correct logic state at VCC ≥ 1V and ignores fast transients via built-in glitch immunity-no external capacitor required for basic operation.

Key Specifications

Pinout & Package

AP1701EWL-7 uses the SC59-3L (SOT-23 compatible) 3-pin surface-mount package with gull-wing leads, 1.9mm × 2.9mm body, and 0.95mm height. Thermal pad not present; JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor reset supervision applications.

Compared with APX809S29-7 and TPS3808G33DBVR, AP1701EWL-7 delivers fixed 240ms reset hold time and guaranteed VCC=1V operation-critical for legacy 3.0V designs where boot timing margins are tight and brownout depth unpredictable.

Availability

AP1701EWL-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body electronics, and smart energy meters requiring stable component supply under extended temperature and long-lifecycle conditions.

Supply support for AP1701EWL-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 for power management, signal integrity, and protection applications.

The AP170x series belongs to Diodes' microprocessor supervisory product line, engineered specifically for cost-sensitive, space-constrained embedded systems requiring high-accuracy voltage monitoring and robust reset generation without external components.

FAQ

What is the function of the RESET pin on AP1701EWL-7?

The RESET pin is an active-low push-pull output that asserts logic low when VCC falls below 2.93V and remains low for ≥240ms after VCC rises above threshold. It drives µP reset inputs directly without external pull-up, sinking up to 1.2mA while maintaining VOL ≤0.3V at VCC ≥1V.

Can AP1701EWL-7 operate with a 2.5V supply?

No. AP1701EWL-7 requires VCC ≥1.0V to assert valid reset, but its 2.93V threshold is designed for +3.0V systems. At 2.5V, VCC remains below threshold continuously, causing permanent RESET assertion-making it unsuitable for 2.5V rails without external level-shifting or alternative supervisors like AP1701GWL-7 (2.25V).

Is AP1701EWL-7 pin-compatible with APX809S29-7?

No. Although both use SC59/SOT23-3 packages and share identical pinout (GND-VCC-RESET), AP1701EWL-7 has fixed 240ms timeout and higher quiescent current (20µA vs. 1.6µA), while APX809S29-7 requires external capacitor for delay extension and offers tighter threshold tolerance (±1.5%).

Why does the datasheet state "NOT RECOMMENDED FOR NEW DESIGN"?

Diodes Incorporated issued this notice because APX809/810 series offer lower IQ (1.6µA), tighter threshold accuracy (±1.5%), and improved ESD performance (4kV HBM). AP1701EWL-7 remains fully supported for existing designs, with no obsolescence timeline published as of January 2007 revision.