Infineon Technologies C161PILM3VCAFXUMA1

Overview

C161PILM3VCAFXUMA1 from Infineon Technologies is a 16-bit single-chip microcontroller in the C166 family, featuring a 4-stage pipeline CPU with 80 ns instruction cycle at 25 MHz, 10-bit ADC (7.8 µs conversion), on-chip PLL clock generation (1:1.5 to 1:5), and 100-pin MQFP/TQFP packaging. It integrates 1 KB IRAM, 2 KB XRAM, dual serial channels, I²C interface (400 kHz), and real-time clock - deployed in industrial motor control and embedded automation systems.

For engineers reviewing the C161PILM3VCAFXUMA1 datasheet, C161PILM3VCAFXUMA1 pinout, C161PILM3VCAFXUMA1 application, or C161PILM3VCAFXUMA1 equivalent, key selection criteria include its 100-pin package compatibility, 10-bit ADC timing specification, PLL-based clock flexibility, and interrupt-driven PEC for deterministic peripheral data transfer in real-time control loops.

Technical Context

The C161PILM3VCAFXUMA1 implements a high-performance 16-bit CPU core with register-based architecture, single-cycle context switching, and 16 MByte linear address space. Its peripheral event controller (PEC) enables single-cycle, interrupt-driven data transfers across eight channels, decoupling CPU load from time-critical I/O operations.

On-chip clock generation uses a programmable PLL with selectable multiplication ratios (1.5×–5×), prescaler, or direct external clock input. The 10-bit successive-approximation ADC supports programmable conversion times down to 7.8 µs and up to four analog inputs mapped to Port 5 pins (AN0–AN3).

Key Specifications

Pinout & Package

Package: 100-pin MQFP (Metric Quad Flat Package) and TQFP (Thin Quad Flat Package), both RoHS-compliant, lead-free, and rated for industrial temperature range (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with C161PILM3VCAFXUMA1, the C167CR-LM offers greater compute headroom and memory but sacrifices I²C and increases cost and footprint; the C164CI-LM adds CAN at the expense of RTC and XRAM - making C161PI optimal for mixed-interface, cost-sensitive industrial control where I²C and timekeeping are integral.

Availability

C161PILM3VCAFXUMA1 is available at Aetrix Electronics and suitable for industrial motor control, embedded HVAC systems, programmable logic relays, and environmental data loggers requiring stable component supply and long-term lifecycle support.

Supply support for C161PILM3VCAFXUMA1 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 manufacturing and R&D infrastructure.

The C166 family - including the C161PI - was engineered for cost-effective, high-reliability industrial control applications demanding real-time responsiveness, mixed-signal integration, and robust peripheral sets without external glue logic.

FAQ

What is the maximum operating frequency of the C161PILM3VCAFXUMA1 CPU core?

The C161PILM3VCAFXUMA1 CPU operates at up to 25 MHz, delivering an 80 ns instruction cycle time. This frequency is achieved using the on-chip PLL with a 5× multiplication ratio applied to a 5 MHz crystal, or directly from a 25 MHz external clock source applied to XTAL1. The core sustains 8 million instructions per second under typical conditions.

Does the C161PILM3VCAFXUMA1 support external memory expansion?

Yes - it supports up to 8 MBytes of external address space for both code and data. Five programmable chip-select signals (CS0–CS4) allow independent configuration of memory-mapped peripherals, with flexible bus timing, 8-/16-bit data width, and multiplexed/demultiplexed address/data bus options. External wait-state insertion via READY signal is fully supported.

Can the on-chip ADC operate independently of CPU intervention?

Yes - the 10-bit ADC can be triggered by hardware events (e.g., timer overflow or external pin edge) and store results directly into memory via the Peripheral Event Controller (PEC). This enables fully autonomous, interrupt-driven sampling sequences without CPU involvement until completion or error condition.

Is the C161PILM3VCAFXUMA1 pin-compatible with earlier C161RI variants?

Yes - the C161PILM3VCAFXUMA1 is a direct functional successor to the C161RI and maintains identical pinout, package dimensions, and electrical characteristics. The datasheet explicitly states it replaces the C161RI, with enhancements including updated ADC timing, improved clock generation description, and added FOUT signal functionality on pin P3.15.