Infineon Technologies C161PILF3VCABXUMA1

Overview

C161PILF3VCABXUMA1 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 8-channel ADC (7.8 µs conversion), on-chip PLL clock generation (1:1.5 to 1:5), 1 KB IRAM + 2 KB XRAM, and I²C interface (400 kHz, 10-bit addressing). It serves as a main control unit in industrial motor drives requiring deterministic real-time response and analog sensing.

For engineers reviewing the C161PILF3VCABXUMA1 datasheet, C161PILF3VCABXUMA1 pinout, C161PILF3VCABXUMA1 application, or C161PILF3VCABXUMA1 equivalent, key selection criteria include its 100-pin TQFP package, 16-priority interrupt system with 40 ns sample rate, peripheral event controller (PEC) for single-cycle data transfers, and support for external bus expansion up to 8 MB with five programmable chip-selects.

Technical Context

The C161PILF3VCABXUMA1 implements a high-performance 16-bit CPU core with register-based architecture, multiple variable register banks, and single-cycle context switching-enabling efficient task scheduling in real-time OS environments. Its PLL supports selectable multiplication ratios (1.5×–5×) of the crystal input, and the clock generator includes prescaler and direct clock input options.

Peripheral integration includes two multi-functional timer units (5 timers total), dual serial channels (asynchronous/synchronous/HS-synchronous), and an I²C interface with two multiplexed channels. The 10-bit ADC features programmable conversion time down to 7.8 µs and uses Port 5 pins (AN0–AN3) as analog inputs with Schmitt-trigger digital fallback.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with C161PILF3VCABXUMA1, the C167CR-LM offers higher performance and CAN but increases system cost and complexity, while the SAB-C161CS-LM sacrifices critical features like PLL and I²C-making it viable only in minimal-functionality replacements.

Availability

C161PILF3VCABXUMA1 is available at Aetrix Electronics and suitable for industrial motor drives, factory automation PLCs, energy metering gateways, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for C161PILF3VCABXUMA1 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 designed for deterministic real-time control in cost-sensitive industrial applications, emphasizing peripheral integration, low-latency interrupt handling, and robust analog-digital co-processing.

FAQ

What is the maximum operating frequency of the C161PILF3VCABXUMA1 CPU core?

The C161PILF3VCABXUMA1 CPU operates at up to 25 MHz, delivering an 80 ns instruction cycle time. Its on-chip PLL supports multiplication ratios from 1.5× to 5× the crystal input, enabling internal CPU clocks up to 25 MHz even with lower-frequency crystals (e.g., 5 MHz crystal × 5 = 25 MHz). This frequency is specified across the full industrial temperature range (–40°C to +85°C) and validated in the 1999-07 preliminary datasheet.

Does the C161PILF3VCABXUMA1 support external memory expansion, and what bus widths are configurable?

Yes, the C161PILF3VCABXUMA1 supports up to 8 MB of external code/data memory via a flexible parallel bus. It allows 8-bit or 16-bit data bus widths, multiplexed or demultiplexed address/data buses, and five independent programmable chip-select signals with configurable wait-state timing per region. This enables direct interfacing with standard SRAM, NOR flash, and FPGA configuration memory without glue logic.

How many analog input channels does the integrated ADC support, and what is its resolution?

The C161PILF3VCABXUMA1 integrates a 10-bit successive-approximation ADC with eight channels, four of which (AN0–AN3) are mapped to Port 5 pins (P5.0–P5.3). Minimum conversion time is 7.8 µs, and the ADC supports programmable sampling windows and automatic channel sequencing. Reference voltage inputs (VAREF/VAGND) are provided separately for precision measurement.

Is the C161PILF3VCABXUMA1 pin-compatible with other members of the C166 family, such as the C167CR-LM?

No, the C161PILF3VCABXUMA1 is not pin-compatible with the C167CR-LM. While both use 100-pin packages, pin assignments differ significantly-for example, the C167CR-LM relocates CAN_TX/RX to Port 10, adds dedicated CAN control pins, and reassigns several timer and serial function pins. Direct substitution requires PCB redesign and firmware adaptation due to incompatible peripheral mappings.