Infineon Technologies C161PIL25MCABXUMA1

Overview

C161PIL25MCABXUMA1 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 time at 25 MHz, 10-bit ADC (7.8 µs conversion), I²C interface (400 kHz), and on-chip PLL supporting 1:1.5 to 1:5 multiplication ratios. It targets cost-sensitive industrial control and embedded motor drive applications.

For engineers reviewing the C161PIL25MCABXUMA1 datasheet, C161PIL25MCABXUMA1 pinout, C161PIL25MCABXUMA1 application, or C161PIL25MCABXUMA1 equivalent, key selection factors include its 100-pin TQFP package, 27-source interrupt system with 40 ns sample rate, 8-channel PEC for single-cycle data transfer, and dual serial channels supporting synchronous/asynchronous and high-speed synchronous modes.

Technical Context

The C161PIL25MCABXUMA1 implements a register-based 16-bit CPU architecture with multiple variable register banks and single-cycle context switching-enabling deterministic real-time task handling. Its peripheral event controller (PEC) supports interrupt-driven, single-cycle data transfers across eight channels, decoupling CPU load from peripheral I/O timing.

On-chip clock generation uses a configurable PLL with selectable division ratios (1:1.5 through 1:5), prescaler, or direct external clock input. The 10-bit ADC features programmable conversion time down to 7.8 µs and shares pins with Port 5, which operates as a Schmitt-trigger input-only port with analog channel capability (AN0–AN3) and timer external control inputs (T4EUD/T2EUD).

Key Specifications

Pinout & Package

Package: 100-pin TQFP (Thin Quad Flat Package), 14 × 14 mm, 0.5 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C161PIL25MCABXUMA1, the C167CR-LM offers greater processing headroom at the expense of legacy code compatibility and cost, while the XMC4500 introduces 32-bit performance and Ethernet but removes direct replacement feasibility due to architectural divergence and peripheral re-mapping.

Availability

C161PIL25MCABXUMA1 is available at Aetrix Electronics and suitable for industrial motor drive, smart sensor node, and PLC I/O module applications requiring stable component supply and long-term lifecycle support.

Supply support for C161PIL25MCABXUMA1 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 industrial microcontrollers, with global R&D and manufacturing infrastructure.

The C166 family-including the C161PI-was engineered for deterministic real-time control in cost-constrained industrial environments, emphasizing peripheral integration, low-latency interrupt handling, and robustness in electrically noisy settings.

FAQ

What is the maximum operating frequency of the C161PIL25MCABXUMA1?

The C161PIL25MCABXUMA1 operates at a maximum CPU clock frequency of 25 MHz, delivering an 80 ns instruction cycle time. Its on-chip PLL supports multiplication ratios from 1:1.5 to 1:5, enabling derived clocks up to 125 MHz for peripherals like timers and serial interfaces-though the core remains locked at 25 MHz.

Does the C161PIL25MCABXUMA1 support in-system programming (ISP)?

Yes-the device includes an on-chip bootstrap loader accessible via UART (P3.10/TxD0 and P3.11/RxD0). Firmware updates can be performed in-system using standard serial protocols without external programming hardware, provided the boot mode pins are configured correctly at reset.

How many analog input channels does the integrated ADC support?

The C161PIL25MCABXUMA1 integrates a 10-bit successive-approximation ADC with four dedicated analog input channels (AN0–AN3), all mapped to Port 5 pins (P5.0–P5.3). These share Schmitt-trigger input circuitry and accept reference voltages via VAREF and VAGND pins.

Is the C161PIL25MCABXUMA1 pin-compatible with earlier C161RI variants?

Yes-the C161PIL25MCABXUMA1 is a direct functional and pin-compatible successor to the C161RI, sharing identical 100-pin TQFP footprint, memory map, and peripheral register layout. The datasheet explicitly states it replaces the C161RI, including updated ADC timing and PLL documentation.