Diodes Incorporated PT8A3514BWEX

Overview

PT8A3514BWEX from Pericom Semiconductor is a dedicated smart electric iron controller IC with integrated shunt regulator, AC-line-synchronized timer (±1% accuracy), movement/position sensor interface, relay and buzzer drivers, and open-drain LED output. It supports 50Hz/60Hz line-frequency clocking, delivers 30s horizontal timeout and 10min vertical timeout, and operates across 120V/240V AC systems in household iron safety control.

For engineers reviewing the PT8A3514BWEX datasheet, PT8A3514BWEX pinout, PT8A3514BWEX application, or PT8A3514BWEX equivalent, key selection criteria include AC-synchronized timing accuracy, dual-position timeout logic, low-power standby (<1W), SOIC-8 lead-free/Green packaging, and direct relay/buzzer/LED drive capability without external logic.

Technical Context

The PT8A3514BWEX implements a fixed-function safety controller architecture centered on AC-line frequency (50Hz) as its primary timing reference, eliminating need for crystal or RC oscillator calibration. Its sensor signal processor uses Schmitt-triggered SW input to distinguish horizontal vs. vertical iron orientation via external mechanical/IR sensor signals.

Internal blocks include a 4.5–5.5V shunt-regulated power supply, 30s/10min timer with ±1% error, logic-controlled RELAY (active-high, 5mA sink), DISC/BUZ (4kHz buzzer drive), and open-drain LED output (10mA sink) with 1Hz flash-on-timeout behavior - all operating within -10°C to +85°C ambient range.

Key Specifications

Pinout & Package

PT8A3514BWEX is supplied in an 8-pin SOIC package (JEDEC MS-012E/AA compliant), measuring 4.7–5.1mm × 3.8–4.0mm × 1.35–1.75mm, with lead-free and RoHS-compliant Green finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PT8A3514BWEX, PT8A3515BWEX reduces vertical timeout to 8min for stricter thermal management, while PT8A3519BWEX retains 10min timing but limits buzzer duration - both maintain identical pin compatibility, ACCLK interface, and standby power performance.

Availability

PT8A3514BWEX is available at Aetrix Electronics and suitable for household appliance safety control, AC-powered thermal shutoff systems, and cost-sensitive embedded iron controller designs requiring stable component supply and long lifecycle support.

Supply support for PT8A3514BWEX 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 provider of high-performance interface, timing, and power management ICs for consumer, computing, and industrial applications.

The PT8A351x series belongs to Pericom's Smart Appliance Controller product line, designed specifically for deterministic, low-cost, hardware-based safety functions in AC-powered thermal appliances without microcontroller dependency.

FAQ

What is the function of the TEST pin on PT8A3514BWEX?

The TEST pin (Pin 5) is a logic-low-activated input that enables accelerated functional verification mode. When held low, it scales down all timeouts proportionally - e.g., 30s becomes 3s and 10min becomes 9.6s - allowing rapid bench validation without waiting for full operational durations. This mode does not affect normal operation when pin is left floating or pulled high.

Can PT8A3514BWEX operate directly from rectified 240VAC?

No - PT8A3514BWEX requires a regulated 4.5–5.5V DC supply. Its internal shunt regulator accepts higher unregulated DC (e.g., ~12–20V derived from rectified 240VAC via resistor-capacitor dropper), then regulates down to VCC. External components (R1, C1, D1 in Figure 5) form the required dropper network; direct 240VAC connection would destroy the IC.

How does the SW pin detect iron orientation?

The SW pin uses a Schmitt-triggered input to interpret voltage level from an external mechanical or infrared sensor. A high logic level indicates horizontal placement (e.g., iron resting flat), triggering 30s timeout; a low level indicates vertical orientation (e.g., iron upright in stand), activating the 10min timeout. Sensor debouncing and noise immunity are handled internally.

Is PT8A3514BWEX pin-compatible with other PT8A351x variants?

Yes - all PT8A351x devices (A/B suffixes, 14–19 numbers) share identical 8-pin SOIC or DIP packages and pin assignments. Timing behavior (vertical timeout duration, buzzer pattern) is determined solely by part number; no PCB redesign is needed when substituting within the family for qualification or regional compliance adjustments.