Microchip Technology CANADAPT28

Overview

CANADAPT28 from Atmel is a passive PLCC28-to-PLCC44 socket adapter designed to mount the T89C51CC02 microcontroller (28-pin PLCC) into a PLCC44 footprint intended for the T89C51CC01. It provides mechanical and electrical compatibility between the two packages, supports 5V operation, maintains pin-aligned signal routing per documented mapping, and enables reuse of existing PLCC44-based development or production sockets.

For engineers reviewing the CANADAPT28 datasheet, CANADAPT28 pinout, CANADAPT28 application, or CANADAPT28 equivalent, this adapter addresses legacy MCU migration, socket consolidation in test fixtures, and rapid prototyping of T89C51CC02-based designs on T89C51CC01-compatible PCBs without layout revision.

Technical Context

The CANADAPT28 implements a fixed, one-to-one pin translation from the 28-pin PLCC package of the T89C51CC02 to the 44-pin PLCC footprint of the T89C51CC01. It routes all 28 functional signals-including I/O ports P0–P4, interrupts INT0/INT1, timers T0/T1, UART RxD/TxD, and oscillator XTAL1/XTAL2-while leaving 16 PLCC44 pins unconnected (NC), as confirmed by the official pin mapping table.

No active circuitry, level shifting, or voltage conversion is included. The adapter operates within the same 5V supply range and temperature specifications as the T89C51CC02, and requires no external power or configuration. Signal integrity relies entirely on the host board's PLCC44 socket and trace design.

Key Specifications

Pinout & Package

Package: PLCC-28 female socket (receptacle) mounted on a rigid, non-conductive substrate with PLCC-44 male pins (header) for insertion into standard PLCC44 sockets. Dimensions conform to JEDEC MO-047B outline.

Key Features

Applications

Availability

CANADAPT28 is available at Aetrix Electronics and suitable for production programming fixtures, legacy board repair, development test sockets, and prototyping platforms requiring stable component supply and long-term socket compatibility.

Supply support for CANADAPT28 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

Atmel Corporation (now part of Microchip Technology) is a semiconductor company specializing in microcontrollers, nonvolatile memory, and programmable logic devices.

CANADAPT28 belongs to Atmel's legacy MCU support tooling product line, developed specifically to extend the usability of the T89C51CC02 in systems originally built around the T89C51CC01.

FAQ

Does CANADAPT28 require any external power or configuration?

No. CANADAPT28 is a fully passive adapter with no active components, regulators, or configuration circuitry. It draws zero current and requires no power supply, jumpers, or firmware. All signal routing is hardwired per the official Atmel pin mapping, and operation is transparent to the host system when used with the T89C51CC02.

Is CANADAPT28 compatible with other PLCC28 microcontrollers besides the T89C51CC02?

CANADAPT28 is specifically designed and validated for the T89C51CC02. Its pin mapping reflects that device's unique I/O assignment (e.g., P4.0/TxDC, P1.x/ANx/CEXx). Using it with other PLCC28 MCUs may result in incorrect signal routing or unconnected critical pins, as no universal PLCC28-to-PLCC44 mapping exists. CANADAPT28 must be used only with the T89C51CC02.

Can CANADAPT28 be used in place of a T89C51CC01 on a PLCC44 socket without modifications?

Yes - but only functionally, not electrically identical. CANADAPT28 allows the T89C51CC02 to physically fit and electrically connect to a PLCC44 socket, yet 16 PLCC44 pins remain unconnected (e.g., P0.x/ADx, A8–A15, PSEN, ALE). System-level compatibility depends on whether the host design uses those unmapped pins. CANADAPT28 does not emulate missing functions.

What is the maximum operating temperature rating for CANADAPT28?

CANADAPT28 has no intrinsic thermal rating, as it contains no active components. Its operational temperature range follows the T89C51CC02 specification: −40°C to +85°C. The adapter's materials and construction are qualified to sustain this range without degradation, consistent with Atmel's industrial-grade PLCC socket standards.

Where can I find the official pin mapping and mechanical drawings for CANADAPT28?

The definitive pin mapping, mechanical dimensions, and usage instructions for CANADAPT28 are published in the "PLCC28 Adapter for T89C51CC02 User Guide", document number 4219A–CAN–01/03, issued by Atmel in 2003. This guide includes the full PLCC44-to-PLCC28 signal table, physical layout diagrams, and socket mounting guidance - all directly applicable to CANADAPT28.