Infineon Technologies C505CA4EMCABXUMA1

Overview

C505CA4EMCABXUMA1 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 ADC 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 body control modules requiring robust serial communication and mixed-signal integration.

For engineers reviewing the C505CA4EMCABXUMA1 datasheet, C505CA4EMCABXUMA1 pinout, C505CA4EMCABXUMA1 application, or C505CA4EMCABXUMA1 equivalent, key selection criteria include CAN bus timing compliance at 1 MBaud, OTP programmability for production firmware lock-in, 10-bit ADC resolution for sensor signal conditioning, and P-MQFP-44 package compatibility with legacy C501/C511 designs.

Technical Context

The C505CA4EMCABXUMA1 integrates a full CAN 2.0B controller licensed from Robert Bosch, with 256 bytes of dedicated CAN register space mapped into external data memory and internal prescaling enabling 1 MBaud operation at ≥8 MHz system clock. Its 10-bit successive-approximation ADC supports up to eight channels with configurable reference (VAREF) and conversion trigger sources including timer overflows and external pins.

It implements three 16-bit timers (Timer 0/1 compatible with standard 8051; Timer 2 with four capture/compare channels), an enhanced USART with programmable baud rate generator, and on-chip emulation support via Infineon's Enhanced Hooks Technology™ for real-time debugging without external probes.

Key Specifications

Pinout & Package

Packaged in P-MQFP-44 (plastic metric quad flat pack, 10 × 10 mm, 0.8 mm pitch), this device features 44 leads with thermal pad exposed on underside for improved heat dissipation in automotive under-hood environments.

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 SAF-C505CA-4E, C505CA4EMCABXUMA1 uniquely combines OTP programmability, extended temperature rating (-40°C to +125°C), and P-MQFP-44 packaging - making it optimal for under-hood automotive nodes requiring post-manufacture firmware updates and thermal resilience.

Availability

C505CA4EMCABXUMA1 is available at Aetrix Electronics and suitable for automotive body electronics, door module controllers, and roof actuation systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for C505CA4EMCABXUMA1 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.

This part belongs to the C500 family of 8-bit microcontrollers designed specifically for cost-sensitive, real-time automotive body electronics applications requiring integrated CAN and mixed-signal peripherals.

FAQ

What is the maximum CAN bit rate supported by C505CA4EMCABXUMA1?

The device supports up to 1 MBaud CAN communication when operating at a minimum system clock frequency of 8 MHz. At 20 MHz, the internal CAN prescaler ensures accurate timing alignment with ISO 11898-1 specifications, enabling reliable high-speed messaging in automotive networks without external timing components.

Does C505CA4EMCABXUMA1 require an external crystal oscillator?

No - it includes an internal oscillator circuit compatible with external quartz crystals (1–20 MHz) or ceramic resonators. XTAL1 and XTAL2 pins connect directly to the selected timing source; no external oscillator IC is needed, simplifying board layout and reducing BOM count for cost-sensitive automotive modules.

How is the 10-bit ADC referenced and calibrated?

The ADC uses an external reference voltage applied to the VAREF pin, allowing ratiometric measurements against sensor supplies or precision references. No factory calibration data is stored; offset/gain errors are compensated in firmware using two-point calibration routines executed during startup or service mode.

Can C505CA4EMCABXUMA1 operate in low-power modes while maintaining CAN receive capability?

Yes - in software power-down mode, the CAN controller remains active and can wake the CPU via interrupt on message reception. Current draw drops below 10 µA while retaining full CAN bus listening functionality, enabling always-on network presence in sleep-state vehicle architectures.