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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

Diodes Incorporated PT8A3254PE

Name: PT8A3254PE
Brand: Diodes Incorporated
SKU: PT8A3254PE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT8A3254PE

Manufacturer:: Diodes Incorporated

Category:: Power Management - Specialized

Package:: 16-DIP (0.300", 7.62mm)

Datasheet:: PT8A3254PE.pdf

Description:: HEATER CONTROLLER DIP-16

Quantity:: RFQ Add To RFQ list

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Inventory:3,485

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Product details

Overview

PT8A3254PE from Pericom Semiconductor is a ceramic heating controller IC with integrated SCR gate driver, 5-level temperature setpoint selection (130°C to 190°C), full internal temperature compensation, and over-temperature protection at 250°C. It operates from 4.0–6.0 V, drives heaters directly via high-current GATE output, and uses heater-self sensing without external thermistors.

For engineers reviewing the PT8A3254PE datasheet, PT8A3254PE pinout, PT8A3254PE application, or PT8A3254PE equivalent, this device supports rapid thermal cycling in ceramic cooktops, precise TCR-adaptive control for alumina heaters, and LED-status feedback for user interface design in safety-critical domestic appliances.

Technical Context

The PT8A3254PE implements a dual-reference comparator architecture with REF1 and REF2 inputs, enabling adjustable voltage thresholds corresponding to five discrete temperature setpoints (130°C–190°C) derived from PTC sensor voltage. Its internal oscillator synchronizes to AC line frequency via CLK input for timer-based operation.

It integrates logic control for three tactile keys (L1/L2/L3), LED scan drivers (C1/C2/L1–L4), and safety-critical outputs: active-high GATE for SCR triggering and open-drain OT for over-temperature shutdown. VB provides regulated sampling power for the PTC network, while VDD1/VDD2 support dual-supply robustness.

Key Specifications

Parameter	Value and Actual Design Meaning
Temperature Setpoints	Five fixed levels: 130°C, 145°C, 160°C, 175°C, 190°C - mapped to internal comparator thresholds (e.g., VT130 = 0.467×(VB−REF2))
GATE Output Drive	−15 mA high / +4.0 mA low - sufficient to directly trigger medium-power SCRs in 110–220 VAC ceramic heater systems
Operating Voltage	4.0–6.0 V - supports stable operation across industrial-grade supply rails with POR activation at 1.5–2.5 V
Over-Temp Threshold	250°C - triggers OT output to disable heating and initiate fuse-melting safety action
Input Sensitivity	L1/L2/L3 threshold: 0.4×VDD low / 0.8×VDD high - compatible with standard mechanical pushbutton interfaces
Power Consumption	≤400 µA - enables low-quiescent operation during standby and key-scan cycles

Pinout & Package

PT8A3254PE is supplied in lead-free DIP-16 package per JEDEC MS-001D/BB, with 2.54 mm pitch, 19.0 mm body length, and 7.6 mm body width.

Pin/Terminal	Circuit Role	Design Meaning
1 L4	I/O	Shared LED output and adjustment input - used for calibration trim or status indication
2 C1 / 3 C2	O	LED common cathode drivers - enable multiplexed scanning of 5 LEDs with minimal external components
4 REF2 / 5 REF1	O / I	Fixed and adjustable reference inputs - define comparator hysteresis and temperature scaling for PTC feedback
6 PTC	I	Heater self-sensing input - accepts voltage from PTC-resistor network on heater element, eliminating external sensor
7 GATE	O	Active-high SCR trigger - delivers −15 mA sink current to fire phase-controlled triac/SCR in AC heating path
8 OT	O	Open-drain over-temperature flag - pulls low when PTC voltage exceeds 250°C threshold, initiating fail-safe shutdown
9 CLK	I	AC line synchronization input - accepts 50/60 Hz zero-crossing signal for timing-critical functions including auto-shutoff
10 GND	GND	Signal and power return - shared reference for all analog comparators and digital logic
11 VB	O	PTC bias supply - regulated ~5 V source for PTC resistor network, ensuring stable sensor excitation
12 VDD2 / 13 VDD1	Power	Dual VDD pins - improve noise immunity and current distribution for analog and digital sections independently
14 L1 / 15 L2 / 16 L3	I/O	Key input and LED output pins - support On/Off, Up, Down functions with integrated LED drive for UI feedback

Key Features

Feature	Design Value
Heater-self temperature sensing	Eliminates need for external NTC/PTC sensors by using heater element as resistive temperature probe
Wide external temperature range adjustability	100°C to 250°C via series resistance on REF1 - enables field calibration for diverse ceramic plate materials
Full environmental temperature compensation	Internal circuitry rejects ambient drift - maintains setpoint accuracy across −20°C to +85°C ambient
Integrated 5-LED status interface	L1–L4 and C1/C2 pins drive all indicators with no external drivers - reduces BOM count and layout area
Over-temperature fail-safe action	OT output activates at 250°C to force SCR-triggered fuse blow - meets IEC 60335-1 thermal cutoff requirements

Applications

Ceramic Cooktop Control

Alumina Heater Management

Use Scenario: Domestic induction-free cooking surface requiring precise, responsive thermal control without external sensors.

IC Role / Device Role / Timing Role: Primary heater controller managing SCR firing angle, temperature setpoint selection, and real-time PTC feedback loop.

Use Value: Enables 5 distinct cooking temperatures (130–190°C) with <±2°C repeatability and automatic recovery after thermal overshoot.

Use Scenario: High-watt-density industrial alumina heating elements used in lab ovens and semiconductor process tools.

IC Role / Device Role / Timing Role: Closed-loop thermal regulator adapting to heater-specific TCR via REF1 adjustment and VB-stabilized PTC biasing.

Use Value: Maintains ±1.5°C stability across 100–250°C range despite ambient shifts from 15°C to 70°C.

Smart Appliance UI Integration

Safety-Critical Thermal Shutdown

Use Scenario: User-facing kitchen appliance with tactile buttons and visual LED feedback for temperature mode selection.

IC Role / Device Role / Timing Role: Embedded UI controller handling On/Off, Up, Down key decoding and synchronized 5-LED status display.

Use Value: Reduces MCU GPIO count by 8 pins - all key inputs and LED outputs managed internally with scan logic.

Use Scenario: Overheat protection in sealed ceramic heating modules where thermal runaway must trigger irreversible shutdown.

IC Role / Device Role / Timing Role: Independent safety monitor asserting OT output at 250°C to drive external SCR/fuse circuit.

Use Value: Meets Class II insulation and thermal cutoff requirements per UL 1278 and IEC 60335-1 Annex G.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ceramic heating controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PT8A3252PE	Includes internal 1-hour (60 Hz) / 1.2-hour (50 Hz) auto power-off timer; otherwise identical pinout, features, and specs	Required where timed heating cycles are mandated (e.g., consumer safety standards)	Select PT8A3252PE if auto-shutoff is required; PT8A3254PE is preferred for continuous-duty or externally timed systems
ST7FLITE29F2	8-bit MCU with ADC, timers, and GPIO - requires firmware development, external PTC interface, and SCR driver circuit	Offers programmable setpoints, data logging, and communication interfaces not available in PT8A3254PE	Choose ST7FLITE29F2 only when flexibility, customization, or multi-zone control outweighs cost and time-to-market constraints

Compared with PT8A3252PE, PT8A3254PE removes the auto-shutoff timer for uninterrupted operation; versus ST7FLITE29F2, it delivers turnkey ceramic heating control with zero firmware investment but fixed functionality.

Availability

PT8A3254PE is available at Aetrix Electronics and suitable for ceramic cooktops, alumina heater modules, smart appliance UI subsystems, and safety-critical thermal shutdown circuits requiring stable component supply and long-term manufacturability.

Supply support for PT8A3254PE 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 Corporation was a fabless provider of high-performance interface, timing, and power management ICs, later acquired by Diodes Incorporated in 2016.

The PT8A325x series belongs to Pericom's dedicated thermal control product line, engineered specifically for ceramic and alumina heating applications requiring self-sensing, multi-level temperature regulation, and integrated safety logic.

FAQ

What is the function of the VB pin on PT8A3254PE?

VB supplies a regulated ~5 V bias voltage to the external PTC resistor network, ensuring consistent excitation independent of VDD fluctuations. This stabilizes temperature measurement accuracy and enables reliable heater-self sensing across supply variations and load conditions.

Can PT8A3254PE be used with 220 VAC heating elements?

Yes - the IC itself operates on low-voltage DC (4–6 V), while its GATE output drives an external SCR or triac rated for 220 VAC. External resistor values (e.g., RS1 = 5.6–12 kΩ for 220 V) must be selected per the application circuit to scale PTC voltage correctly.

How does PT8A3254PE achieve temperature compensation without external sensors?

It uses the heater element itself as a PTC sensor, measuring resistance changes directly. Internal circuitry compensates for ambient temperature drift by referencing dual comparator inputs (REF1/REF2) and regulating VB, making the system insensitive to environment temperature shifts.

Is PT8A3254PE pin-compatible with PT8A3252PE?

Yes - both share identical DIP-16 and SOIC-16 footprints, pin assignments, electrical characteristics, and functional blocks. The sole difference is the absence of the internal auto power-off timer in PT8A3254PE, making them hardware-interchangeable in PCB layouts.

PT8A3254PE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 16-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Applications:: Heating Controller

Current - Supply:: -

Voltage - Supply:: 4V ~ 6V

Operating Temperature:: -20°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 16-PDIP

PT8A3254PE FAQ

1.How can I place an order for PT8A3254PE through Aetrix?

Please submit a Request for Quotation (RFQ) for PT8A3254PE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PT8A3254PE reliable?

The price and inventory of PT8A3254PE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT8A3254PE is usually 5 days.

3.What payment methods are accepted for PT8A3254PE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT8A3254PE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PT8A3254PE?

PT8A3254PE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PT8A3254PE order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PT8A3254PE?

For technical support, including PT8A3254PE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT8A3254PE requirements.

6.How does Aetrix verify that PT8A3254PE is sourced from the original manufacturer or authorized distributors?

All PT8A3254PE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PT8A3254PE meets industry standards.

7.What is the process for return or replacement of PT8A3254PE?

All PT8A3254PE units undergo pre-shipment inspection (PSI). If there is an issue with PT8A3254PE, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PT8A3254PE part is unused and in its original packaging.

Return procedure for PT8A3254PE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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