PT8A2511PE

Programmable Timers And Oscillators Overview

The PT8A2511PE is a Toaster Controller manufactured by Diodes Incorporated, designed for fixed-timer applications in toasting systems. It operates on a 3.5V to 5.5V supply voltage and supports an operating temperature range of 0°C to +85°C. The device features dedicated inputs for Defrost and Reheat functions, which can also serve as status indicators. It includes a built-in oscillator requiring external components (R1=56kΩ, C1=223) to generate a 1024Hz frequency. The controller drives a relay output directly and provides specific pulse outputs (RX, CX) synchronized with Reheat and Defrost activations. This component is marked as obsolete and discontinued.

Programmable Timers And Oscillators Feature Summary

• Dedicated Defrost and Reheat function control with indicator outputs
• Built-in RC oscillator generating 1024Hz nominal frequency
• Direct Relay drive output capable of sourcing up to 15mA
• Automatic power-off timer functionality for safety

Programmable Timers And Oscillators Applications

• Toaster timer control systems
• Fixed-time heating appliance controllers

Programmable Timers And Oscillators Procurement Notes

The PT8A2511PE is officially listed as Obsolete and Discontinued by Diodes Incorporated. Sourcing new units from authorized distributors is not possible. Verification of stock availability through secondary market channels or alternative suppliers is required. Designers should consider the end-of-life status when planning long-term production.

Programmable Timers And Oscillators Selection Notes

This component is specifically engineered for toaster applications requiring Defrost and Reheat capabilities. It requires an external NTC thermistor and heater circuit for operation. Engineers must account for the discontinuation status and evaluate replacement options within the PT8A25xx series or equivalent universal timer controllers that support similar pinouts and functionalities.

Programmable Timers And Oscillators Part Context

The PT8A2511 belongs to the PT8A25xx family of Universal Timer Controllers produced by Diodes Incorporated (formerly Pericom Semiconductor). These mixed-signal CMOS LSI chips are designed to drive external relays for safety power control in AC-powered appliances. The family typically supports various timer durations and package types such as DIP-8 and SOIC-8.

Programmable Timers And Oscillators Replacement Considerations

As the PT8A2511 is discontinued, engineers should review other models in the PT8A25xx series or consult Diodes Incorporated for current equivalents. Substitution requires verifying compatibility with the existing 8-pin DIP/SOIC footprint, voltage requirements (3.5V-5.5V), and specific timer duration needs.