Diodes Incorporated PT8A3514BWE

Overview

PT8A3514BWE from Pericom Semiconductor is a dedicated smart electric iron controller IC with integrated shunt regulator, sensor signal processor, 30s horizontal timeout and 10-minute vertical timeout, AC 60Hz clock input, and open-drain LED/buzzer/relay drive outputs in SOIC-8 package. It enables automatic power cutoff for safety-critical household iron applications.

For engineers reviewing the PT8A3514BWE datasheet, PT8A3514BWE pinout, PT8A3514BWE application, or PT8A3514BWE equivalent, this device supports dual-voltage (120V/240V) systems, offers ±1% timer accuracy, low standby power (<1W), test mode activation, and precise movement/static position detection via external sensor interface.

Technical Context

The PT8A3514BWE implements a sensor-based safety control architecture using AC line frequency (60Hz) as its primary timing reference, eliminating need for external crystal. Its internal logic interprets SW pin voltage level to distinguish horizontal vs. vertical iron orientation and triggers corresponding timeout intervals.

It integrates a shunt-regulated 5V supply (4.5–5.5V), Schmitt-triggered ACCLK input, and three independent output drivers: active-high RELAY (20mA sink), open-drain LED (10mA sink), and DISC/BUZ (20mA sink, 4kHz buzzer tone on timeout). Power-on reset and system oscillator are fully on-chip.

Key Specifications

Pinout & Package

PT8A3514BWE is housed in a lead-free, RoHS-compliant SOIC-8 package (JEDEC MS-012E/AA), measuring 4.7–5.1 mm × 3.8–4.0 mm × 1.35–1.75 mm, with 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart iron controller applications.

Compared with PT8A3514BWE, PT8A3515BWE shortens vertical timeout for faster thermal shutdown, while PT8A3517BWE modifies buzzer behavior to reduce acoustic duration-both retain identical pinout, supply, and sensor interface, enabling drop-in replacement with firmware-free hardware reuse.

Availability

PT8A3514BWE is available at Aetrix Electronics and suitable for electric iron safety control, dual-voltage household appliance timer systems, and energy-efficient standby mode implementations requiring stable component supply and long-term lifecycle support.

Supply support for PT8A3514BWE 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

Pericom Semiconductor (now part of Diodes Incorporated) is a fabless semiconductor company specializing in timing, interface, and power management solutions for consumer and industrial electronics.

The PT8A351x series belongs to Pericom's Smart Appliance Controller product line, designed specifically for safety-critical, low-cost, single-function household appliances requiring autonomous motion-aware shutdown logic.

FAQ

What is the function of the ACCLK pin?

The ACCLK pin accepts a 60Hz AC line signal (Schmitt-triggered) and serves as the precision timing reference for all internal timeouts. It eliminates the need for an external crystal oscillator and ensures ±1% accuracy across temperature and voltage variations. The signal is internally divided and synchronized to generate exact 30-second and 10-minute intervals without software intervention.

How does the PT8A3514BWE detect iron orientation?

Orientation detection relies on the SW (Sensor) input pin: a high logic level indicates horizontal position, while low indicates vertical position. This signal originates from an external mechanical or MEMS sensor circuit that converts iron tilt into a clean digital voltage threshold. The IC's internal logic uses this state to select between 30s (horizontal) or 10min (vertical) timeout modes.

Can the PT8A3514BWE operate on both 120V and 240V mains?

Yes-the IC itself operates from a regulated 5V supply derived from the mains via external resistor-capacitor dropper networks shown in Figures 5–8. Application circuits for 120V/60Hz and 240V/50Hz are explicitly provided, with only R1/R2 value changes required. The PT8A3514BWE variant is rated for 60Hz operation and supports both voltage systems through proper front-end design.

What happens during test mode activation?

When the TEST pin is held low, the device enters functional test mode: all timeouts scale down by a factor of 10 (e.g., 10-minute vertical timeout becomes 9.6 seconds). This allows rapid verification of relay cutoff, LED flashing, and buzzer tone without waiting for full operational durations-ideal for production line testing and debug.