Diodes Incorporated PT8A3514BPE

Overview

PT8A3514BPE from Pericom Semiconductor is a dedicated smart electric iron controller IC with integrated shunt regulator, AC-line-synchronized timer (60Hz), 30s horizontal timeout and 10min vertical timeout, open-drain LED driver, active-high relay output, and buzzer tone generation at 4kHz. It enables automatic power cutoff in static positions for safety compliance in 120V/60Hz household iron systems.

For engineers reviewing the PT8A3514BPE datasheet, PT8A3514BPE pinout, PT8A3514BPE application, or PT8A3514BPE equivalent, key selection criteria include AC clock input architecture, dual-mode timeout timing accuracy (±1%), sensor signal conditioning for tilt/motion detection, low-standby-power operation (<1W system-level), and DIP-8 lead-free packaging compatibility with legacy iron PCB layouts.

Technical Context

The PT8A3514BPE uses AC 60Hz line frequency as its primary timing reference via Schmitt-triggered ACCLK input, eliminating external crystal or RC timing components. Its internal logic decodes sensor movement (SW pin) and orientation to trigger either 30s (horizontal) or 10min (vertical) auto-shutoff sequences with ±1% timing accuracy.

It integrates a 4.5–5.5V on-chip shunt regulator for stable VCC supply, supports both 120V and 240V mains-compatible application circuits, and delivers active-high RELAY drive (≤20mA sink), open-drain LED control (10mA sink), and 4kHz buzzer output (DISC/BUZ pin) upon timeout - all with <400µA quiescent current at 4V.

Key Specifications

Pinout & Package

DIP-8 (lead-free, JEDEC MS-001D/BA compliant) package with 2.54mm pitch; 9.0–9.4mm body width, 6.2–6.6mm body length, 3.71–4.31mm height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PT8A3514BPE, PT8A3515BPE offers tighter vertical shutoff for space-constrained designs, while PT8A3517BPE trades continuous buzzer output for burst-mode alert-both maintain identical sensor interface, ACCLK synchronization, and low-power operation.

Availability

PT8A3514BPE is available at Aetrix Electronics and suitable for electric iron auto-shutoff systems, thermal safety controllers, and AC-mains-powered appliance timing modules requiring stable component supply across global OEM manufacturing cycles.

Supply support for PT8A3514BPE 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, engineered specifically for electromechanical safety functions in AC-powered household appliances - emphasizing reliability, low BOM cost, and integration of timing, sensing, and drive functions in a single 8-pin IC.

FAQ

What is the function of the ACCLK pin on PT8A3514BPE?

The ACCLK pin accepts 60Hz AC line voltage (via internal Schmitt trigger) to serve as the primary timing reference for all internal timers. This eliminates external crystal or RC timing components and ensures ±1% accuracy by locking to mains frequency - essential for safety-critical auto-shutoff in 120V/60Hz regions.

How does the PT8A3514BPE detect horizontal versus vertical iron position?

It uses the SW (sensor) input pin: a logic-high signal indicates horizontal orientation, while logic-low indicates vertical. Internal hardware debouncing and threshold logic process the raw sensor output to reject vibration noise and ensure reliable static-state detection before initiating timeout sequences.

Can the PT8A3514BPE operate directly from 120V AC without external regulation?

No - it requires a DC supply of 4.5–5.5V. In practice, this is derived from 120V AC using an external resistor-capacitor dropper network and rectification, followed by the IC's internal shunt regulator which stabilizes VCC. The datasheet confirms system standby power <1W using this topology.

What is the purpose of the TEST pin, and how is it used?

The TEST pin enables a factory functional test mode when pulled low: it scales down all timeout durations by ~10× (e.g., 10min → 9.6s), allowing rapid verification of relay, LED, and buzzer responses without waiting for full operational timing - critical for high-volume production line testing.