Diodes Incorporated PT8A3517BPE

Overview

PT8A3517BPE from Pericom Semiconductor is a dedicated smart electric iron controller IC with integrated shunt regulator, AC-line-synchronized timer (60Hz), 8-minute vertical timeout, 30-second horizontal timeout, buzzer drive (4kHz), and relay/LED control outputs in DIP-8 package. It detects iron position via external sensor input and supports 120V/240V systems.

For engineers reviewing the PT8A3517BPE datasheet, PT8A3517BPE pinout, PT8A3517BPE application, or PT8A3517BPE equivalent, key selection criteria include AC clock frequency compatibility (60Hz), vertical timeout duration (8 min), buzzer behavior (continual tone on timeout), and open-drain LED drive capability.

Technical Context

This IC implements a safety-critical timing architecture using AC line frequency (60Hz) as its primary timebase, achieving ±1% timer accuracy without crystal. Its sensor signal processor handles debounce and inclination-based movement detection with Schmitt-triggered SW and ACCLK inputs.

The chip integrates a 5V shunt regulator (4.5–5.5V output), logic control block for relay/LED/buzzer sequencing, power-on reset, and system oscillator. All outputs - RELAY (active-high), DISC/BUZ (4kHz active-high), and LED (open-drain, active-low) - are designed for direct interface with discrete driver transistors in iron control circuits.

Key Specifications

Pinout & Package

DIP-8 (lead-free, JEDEC MS-001D/BA compliant) with 2.54 mm pitch; body dimensions 9.0–9.4 mm × 6.2–6.6 mm × 3.2–3.6 mm height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PT8A3517BPE, PT8A3515BPE offers identical timing but different buzzer behavior (6-pulse vs. continual), while PT8A3517APE maintains full functional parity except for AC clock frequency - making it suitable only for 50Hz infrastructure.

Availability

PT8A3517BPE is available at Aetrix Electronics and suitable for electric iron safety shutdown, AC-powered appliance timing, smart iron status indication, and buzzer-enabled appliance alert applications requiring stable component supply across global manufacturing programs.

Supply support for PT8A3517BPE 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 interface, timing, and power management solutions for consumer and industrial electronics.

The PT8A351x series belongs to Pericom's Smart Appliance Controller product line, engineered specifically for cost-sensitive, safety-critical household appliances requiring reliable, crystal-free timing and position-aware shutdown logic.

FAQ

What is the function of the TEST pin on PT8A3517BPE?

The TEST pin enables a diagnostic mode when pulled low. In this mode, all timeout durations scale linearly: 30s becomes 3s, 8min becomes 9.6s, and so on. This allows rapid functional verification without waiting for full timeout periods during bench testing or production calibration.

Can PT8A3517BPE operate directly from rectified 120VAC or 240VAC?

No - PT8A3517BPE requires a regulated 4.5–5.5V DC supply. Typical application circuits use resistor-capacitor dropper networks followed by a Zener or shunt regulator stage to derive VCC. The internal shunt regulator stabilizes the core voltage but does not replace the need for external AC-to-DC conversion.

How does PT8A3517BPE detect iron orientation?

It uses the SW (Sensor) input pin, which receives a logic-level signal from an external mechanical or infrared sensor assembly. A high level on SW indicates horizontal orientation (triggering 30s timeout); low level indicates vertical orientation (enabling 8min timeout). Internal Schmitt triggering ensures noise immunity.

Is PT8A3517BPE pin-compatible with other PT8A351x variants?

Yes - all PT8A351x variants (A/B suffixes, 14–19 numbers) share identical DIP-8 and SOIC-8 pinouts and electrical characteristics. Differences are limited to internal timer configuration (50Hz/60Hz, timeout durations, buzzer pattern), programmed at wafer sort and non-field-programmable.