Infineon Technologies C505CA4EMCAKXQMA1

Overview

C505CA4EMCAKXQMA1 from Infineon Technologies is an 8-bit single-chip microcontroller based on the enhanced 8051 architecture, featuring a full CAN 2.0B controller, 32 KB on-chip OTP program memory, 1 KB on-chip XRAM, and a 10-bit A/D converter with up to 8 analog inputs. It operates at up to 20 MHz (300 ns instruction cycle), supports four priority-level interrupts, and targets automotive and industrial embedded control systems requiring robust real-time communication.

For engineers reviewing the C505CA4EMCAKXQMA1 datasheet, C505CA4EMCAKXQMA1 pinout, C505CA4EMCAKXQMA1 application, or C505CA4EMCAKXQMA1 equivalent, key selection criteria include CAN 2.0B compliance, 10-bit ADC resolution, OTP memory security, P-MQFP-44 package compatibility, and support for slow-down/idle/power-down low-power modes in harsh-temperature environments.

Technical Context

The C505CA4EMCAKXQMA1 integrates a full-CAN controller compliant with ISO 11898-1:2003 (CAN 2.0B), with 256 bytes of dedicated CAN register/data space mapped into external data memory and configurable bit timing supporting up to 1 MBaud at ≥8 MHz system clock. Its 10-bit successive-approximation ADC includes programmable sampling rate and conversion trigger sources including timer overflows and external events.

It implements three 16-bit timers (Timer 0/1 compatible with standard 8051; Timer 2 with four independent capture/compare channels), eight datapointers for efficient memory access, and on-chip emulation support via Infineon's Enhanced Hooks Technology™ for real-time debugging without external probes.

Key Specifications

Pinout & Package

P-MQFP-44 (Plastic Metric Quad Flat Package, 44-pin, 10 mm × 10 mm, 0.8 mm pitch) with thermal pad. Pinout fully compatible with C501/C504/C511/C513 families for drop-in migration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit CAN microcontroller applications.

Compared with SAB80C537-L, C505CA4EMCAKXQMA1 reduces system complexity through integrated CAN and eliminates external transceiver timing skew; versus TC1766, it offers lower power, smaller footprint, and proven qualification for legacy automotive platforms without safety certification overhead.

Availability

C505CA4EMCAKXQMA1 is available at Aetrix Electronics and suitable for automotive body control modules, industrial CAN gateways, engine sensor interfaces, and off-highway telematics nodes requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for C505CA4EMCAKXQMA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and microcontrollers, with global R&D and manufacturing facilities.

The C500 family-including the C505CA-was designed specifically for cost-sensitive, high-reliability automotive and industrial control applications requiring CAN 2.0B connectivity, analog sensing, and extended temperature operation without external peripherals.

FAQ

What is the maximum CAN bit rate supported by C505CA4EMCAKXQMA1?

The C505CA4EMCAKXQMA1 supports up to 1 MBaud CAN bit rate when operating at ≥8 MHz system clock frequency. Its internal CAN clock prescaler allows stable operation even at system clock frequencies above 10 MHz, maintaining accurate bit timing across the full temperature range (–40 °C to +125 °C).

Does C505CA4EMCAKXQMA1 require an external crystal, or can it use an RC oscillator?

C505CA4EMCAKXQMA1 requires an external crystal or ceramic resonator connected to XTAL1/XTAL2 pins; it does not include an internal RC oscillator. The oscillator circuit supports fundamental-mode crystals from 1 MHz to 20 MHz and includes an oscillator watchdog to detect crystal failure and force safe reset.

How is program memory protected on the C505CA4EMCAKXQMA1 OTP variant?

The C505CA4EMCAKXQMA1 uses one-time-programmable (OTP) memory with hardware lock bits that permanently disable further programming and read-out after final firmware burn. This prevents reverse engineering and unauthorized firmware modification, meeting basic IP protection requirements for automotive Tier-1 suppliers.

Can Port 1 pins be used simultaneously as digital I/O and analog inputs?

No - Port 1 pins (P1.0–P1.7) are multiplexed: they function as general-purpose digital I/O by default, but must be configured exclusively as analog inputs when used with the 10-bit ADC. Concurrent digital output while sampling analog signals is not supported and may cause measurement errors or port contention.