Diodes Incorporated PT8A2514APE

Overview

PT8A2514APE from Pericom Semiconductor is a dedicated CMOS LSI toaster controller IC with integrated power-on reset, key scan, timer, and dual-oscillator (internal 256 kHz + external R/C 7.8–8.6 kHz) circuits. It supports Defrost, Reheat, and Bagel functions with interlocked Defrost/Reheat inputs and independent Bagel input, operates from 3.5V to 5.5V, and drives relays and LEDs directly in an 8-pin DIP package for residential toaster control.

For engineers reviewing the PT8A2514APE datasheet, PT8A2514APE pinout, PT8A2514APE application, or PT8A2514APE equivalent, this page delivers verified functional roles per pin, real-world timing behavior (30s–10min adjustable via R/C), relay drive capability (I_OL = 4 mA on Defrost/Reheat), active-high Bagel output, and confirmed thermal limits (0°C to 85°C operating range).

Technical Context

The PT8A2514APE implements a state-machine-based logic control core that sequences function activation based on scanned key inputs and manages timer expiration to de-energize relays. Its dual-oscillator architecture uses an internal 256 kHz RC oscillator for key scanning and fault detection, while the external R/C oscillator (7.8–8.6 kHz, typ. 8.192 kHz with 47 kΩ/332 pF) sets precise timing resolution for the 30s–10min adjustable bake cycle.

Pin functionality is dynamically reconfigured: Defrost and Reheat pins serve as both negative-pulse inputs and active-low open-drain outputs driving relays; Bagel pin acts as positive-pulse input and active-high output; CX and RX are dedicated open-drain outputs tied to GND or VCC respectively during function execution to modulate oscillator frequency.

Key Specifications

Pinout & Package

PT8A2514APE is housed in a lead-free 8-pin DIP (Dual In-line Package) with 2.54 mm pitch, 9.01–10.16 mm body width, and JEDEC MS-001 BA compliant footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PT8A2515APE, PT8A2514APE trades Cancel/LED flexibility for lower gate count and reduced test complexity; versus PT8A2513APE, it adds Bagel support without increasing supply current or thermal load - making it optimal for mid-tier toasters needing three distinct functions with minimal component overhead.

Availability

PT8A2514APE is available at Aetrix Electronics and suitable for residential toaster control, compact dual-function appliance design, and energy-efficient small kitchen electronics requiring stable component supply and long-lifecycle availability.

Supply support for PT8A2514APE 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 analog and mixed-signal IC designer specializing in timing, interface, and power management solutions before its acquisition by Diodes Incorporated in 2016.

The PT8A2514APE belongs to Pericom's appliance-specific LSI controller product line, engineered for cost-sensitive, high-volume electromechanical cooking devices requiring deterministic timing, robust key scanning, and direct load driving without microcontroller intervention.

FAQ

What external components are mandatory for basic PT8A2514APE operation?

The PT8A2514APE requires an external R/C network (R1 = 47 kΩ, C1 = 332 pF) on the OSC pin to establish the 8.192 kHz system clock, a 10 µF decoupling capacitor on VCC, and pull-down resistors on Defrost/Reheat inputs for reliable negative-pulse detection. No crystal or external oscillator IC is needed due to the integrated R/C oscillator circuit.

How does the PT8A2514APE handle simultaneous Defrost and Reheat key presses?

The PT8A2514APE implements hardware-level interlock logic: if the Defrost key is pressed first, the Reheat input is disabled until Defrost completes or is canceled; vice versa. This prevents concurrent activation and ensures exclusive function execution - no firmware or external logic is required to enforce this behavior.

Can the PT8A2514APE drive a 12 V relay directly?

No - the PT8A2514APE is rated for 3.5–5.5 V operation and its Defrost/Reheat outputs sink only 4 mA at 0.5 V drop. Driving a 12 V relay requires an external NPN transistor (e.g., 8050) or relay driver IC. The datasheet reference design shows Q1 (8050) used for 220 VAC heater control, confirming external amplification is necessary for higher-voltage loads.

Is the internal 256 kHz oscillator used during normal operation or only at startup?

The internal 256 kHz oscillator remains active during normal operation to continuously monitor key inputs and verify external R/C oscillator integrity. It provides the clock for key scanning and fault detection, while the external 8.192 kHz oscillator exclusively controls timing-critical functions like timer counting and relay deactivation.