Infineon Technologies C505CA4EMCAFXQMA1

Overview

C505CA4EMCAFXQMA1 from Infineon Technologies is an 8-bit single-chip microcontroller in the C500 family, fully compatible with the 8051 architecture and extended with 8 datapointers, 32K-byte on-chip OTP program memory, 1K-byte on-chip XRAM, and a 10-bit A/D converter with up to 8 analog inputs. It integrates a full CAN 2.0B controller supporting 1 MBaud operation at ≥8 MHz clock, and targets automotive body electronics and industrial control nodes requiring robust serial communication and mixed-signal processing.

For engineers reviewing the C505CA4EMCAFXQMA1 datasheet, C505CA4EMCAFXQMA1 pinout, C505CA4EMCAFXQMA1 application, or C505CA4EMCAFXQMA1 equivalent, key selection criteria include its OTP-based firmware security, CAN bus timing compliance at 1 MBaud, 10-bit ADC resolution with 8-channel analog input capability, and P-MQFP-44 package compatibility with legacy C501/C511-family layouts.

Technical Context

The C505CA4EMCAFXQMA1 implements a superset of the 8051 core with dual data pointers per bank, three 16-bit timers (including Timer 2 with four capture/compare channels), and an enhanced USART with programmable baudrate generator. Its CAN module uses dedicated 256-byte register space in external data memory and includes internal clock prescaling for stable operation above 10 MHz oscillator input.

On-chip resources include 256-byte RAM, 1K-byte XRAM, fast power-on reset, and three low-power modes-idle, slow-down, and software power-down-with wake-up via P3.2/INT0 or P4.1/RXDC. The 10-bit A/D converter supports simultaneous sampling control and conversion trigger via Timer 2 or external signal.

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; pin-compatible with C501, C504, and C511/C513 families.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SAB-C505CA-4R and C515C-16R, the C505CA4EMCAFXQMA1 uniquely combines field-programmable OTP, 10-bit ADC, and integrated CAN 2.0B - making it optimal for development-phase automotive nodes requiring firmware iteration and sensor+network integration in one chip.

Availability

C505CA4EMCAFXQMA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN nodes, off-highway equipment monitors, and commercial vehicle gateways requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for C505CA4EMCAFXQMA1 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 security solutions, with global R&D and manufacturing infrastructure.

The C500 family - including the C505CA - was designed specifically for automotive and industrial real-time control applications demanding integrated CAN, mixed-signal capability, and robustness across wide temperature ranges.

FAQ

What is the maximum CAN bit rate supported by the C505CA4EMCAFXQMA1?

The C505CA4EMCAFXQMA1 supports up to 1 MBaud CAN communication when operating at ≥8 MHz system clock frequency. Its internal CAN clock prescaler maintains timing accuracy even with oscillator inputs above 10 MHz, ensuring compliance with ISO 11898-2 high-speed CAN physical layer specifications across all qualified temperature grades.

Does the C505CA4EMCAFXQMA1 require an external crystal oscillator?

No - the C505CA4EMCAFXQMA1 supports both external crystal/resonator (via XTAL1/XTAL2) and external clock input (applied to XTAL1). It includes an internal oscillator watchdog that continuously monitors clock stability and triggers reset if oscillation fails, enhancing reliability in vibration-prone automotive environments.

How is the 10-bit ADC calibrated and referenced?

The 10-bit ADC uses VAREF and VAGND as dedicated analog reference inputs, electrically isolated from digital supply rails to minimize noise coupling. Calibration is factory-trimmed and stored in on-chip registers; no user calibration routine is required. Conversion results are right-aligned in the ADRES SFR and support software-triggered or Timer 2–triggered acquisition.

Can the C505CA4EMCAFXQMA1 operate in extended temperature ranges?

Yes - the C505CA4EMCAFXQMA1 is manufactured in SAH-grade packaging, rated for operation from -40°C to +110°C. This qualification meets AEC-Q100 stress test requirements for under-hood automotive applications and ensures functional stability without derating in high-ambient industrial settings.