Infineon Technologies C161PILM3VCABXUMA1

Overview

C161PILM3VCABXUMA1 from Infineon Technologies is a 16-bit single-chip microcontroller in the C166 family, serving as a high-performance embedded control unit with integrated 1 KB IRAM, 2 KB XRAM, 10-bit ADC (7.8 µs conversion), dual serial channels, I²C interface (400 kHz), and on-chip PLL clock generation (1:1.5–5). It operates at up to 25 MHz CPU clock (80 ns instruction cycle) and targets cost-sensitive industrial motor control and power electronics.

For engineers reviewing the C161PILM3VCABXUMA1 datasheet, C161PILM3VCABXUMA1 pinout, C161PILM3VCABXUMA1 application, or C161PILM3VCABXUMA1 equivalent, key selection considerations include its 100-pin TQFP/MQFP package, 16-priority interrupt system with 27 sources, single-cycle context switching, programmable watchdog timer, and real-time clock - all critical for deterministic real-time firmware execution in resource-constrained systems.

Technical Context

The C161PILM3VCABXUMA1 implements a 4-stage pipelined 16-bit CPU with register-based architecture, supporting HLL and OS primitives via enhanced Boolean bit manipulation and additional instructions. Its memory map spans 16 MB linear address space, with configurable external bus (8/16-bit data width, multiplexed/demultiplexed) and five programmable chip-select signals.

Peripheral integration includes two multi-functional general-purpose timer units (5 timers total), 8-channel peripheral event controller (PEC) for interrupt-driven single-cycle data transfers, and dual serial interfaces - one supporting synchronous/asynchronous modes plus high-speed synchronous, the other dedicated to I²C (10-bit addressing, 400 kHz).

Key Specifications

Pinout & Package

Package: 100-pin MQFP (Metric Quad Flat Package) / TQFP (Thin Quad Flat Package), RoHS-compliant, lead-free, body size 20 × 14 mm, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C161PILM3VCABXUMA1, the C167CR-LM offers higher compute headroom at increased footprint and cost, while the SAB-C161CS-LM sacrifices integrated peripherals and memory to reduce price - making the C161PI the optimal balance for mid-tier industrial control where I²C, RTC, and PEC are essential.

Availability

C161PILM3VCABXUMA1 is available at Aetrix Electronics and suitable for industrial motor drives, switch-mode power supplies, programmable logic controller I/O modules, and automotive body control modules requiring stable component supply across extended product lifecycles.

Supply support for C161PILM3VCABXUMA1 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 electronics, and industrial control ICs, with global R&D and manufacturing infrastructure.

The C161PI belongs to the legacy C166 microcontroller family, designed specifically for deterministic real-time embedded control in cost-sensitive industrial and automotive applications where integration, reliability, and toolchain maturity are prioritized over raw performance.

FAQ

What is the maximum operating frequency and corresponding instruction cycle time for C161PILM3VCABXUMA1?

The C161PILM3VCABXUMA1 supports a maximum CPU clock frequency of 25 MHz, delivering an 80 ns instruction cycle time. This timing is achieved using the on-chip PLL configured for 1:2 or 1:2.5 multiplication of a 10–12.5 MHz crystal, and is validated across the industrial temperature range (−40°C to +85°C) per the 1999 datasheet AC characteristics.

Does C161PILM3VCABXUMA1 support in-system programming (ISP) or bootloading?

Yes, the C161PILM3VCABXUMA1 includes an on-chip bootstrap loader accessible via UART (P3.10/P3.11), enabling firmware updates without external programming hardware. The loader supports Intel HEX file format and requires no external ROM; it resides in protected on-chip ROM and activates on power-up when RSTIN is held low for >100 ms.

How many analog input channels does the integrated ADC support, and what are their pin mappings?

The 10-bit ADC supports four analog input channels mapped exclusively to Port 5 pins: P5.0/AN0, P5.1/AN1, P5.2/AN2, and P5.3/AN3. These are Schmitt-trigger inputs with dedicated sample-and-hold circuitry, and conversion time is programmable down to 7.8 µs - confirmed in Section 25 of the 1999 datasheet.

Is C161PILM3VCABXUMA1 pin-compatible with earlier C161RI derivatives?

Yes, the C161PILM3VCABXUMA1 is a direct functional and pin-for-pin replacement for the C161RI, as stated in the datasheet revision history: "The C161PI is the successor of the C161RI. Therefore this data sheet also replaces the C161RI data sheet." All 100-pin MQFP/TQFP packages share identical pinout, electrical characteristics, and memory map.