Infineon Technologies C161PILMCABXUMA1

Overview

C161PILMCABXUMA1 from Infineon Technologies is a 16-bit single-chip microcontroller in the C166 family, featuring a 4-stage pipeline CPU delivering 8 MIPS at 25 MHz, integrated 10-bit ADC (7.8 µs conversion), dual serial channels (including I²C at 400 kHz), and on-chip PLL clock generation with selectable multiplication ratios (1.5× to 5×). It serves as a cost-optimized control unit for industrial motor drives and embedded automation systems requiring deterministic real-time response.

For engineers reviewing the C161PILMCABXUMA1 datasheet, C161PILMCABXUMA1 pinout, C161PILMCABXUMA1 application, or C161PILMCABXUMA1 equivalent, this page provides verified technical context, validated pin functions, confirmed peripheral timing constraints, and documented alternative selection guidance for legacy C166-based designs.

Technical Context

The C161PILMCABXUMA1 implements a Harvard-architecture 16-bit CPU with register-based design, single-cycle context switching, and 16 MByte linear address space. Its interrupt system supports 27 sources across 16 priority levels, with minimum sample rate of 40 ns and hardware-assisted PEC for single-cycle data transfers.

On-chip peripherals include two multi-functional timer units (5 timers total), dual synchronous/asynchronous serial interfaces, and an I²C controller supporting 10-bit addressing. Clock generation uses an internal PLL with programmable dividers, enabling stable 25 MHz operation from a 5–10 MHz crystal input.

Key Specifications

Pinout & Package

The C161PILMCABXUMA1 is housed in a 100-pin MQFP (Metric Quad Flat Package) with 0.5 mm lead pitch and thermally enhanced construction. Pin assignments are identical between MQFP and TQFP variants per Infineon's 1999-07 datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C161PILMCABXUMA1, the C167CR-LM adds CAN and processing headroom at the cost of board redesign, while the SAB-C161PI-LF offers identical functionality in a RoHS-compliant, thermally robust package-making it the optimal drop-in replacement for production continuity.

Availability

C161PILMCABXUMA1 is available at Aetrix Electronics and suitable for industrial motor drives, automated test equipment, energy metering interfaces, and legacy PLC module replacements requiring stable component supply and long-term obsolescence mitigation.

Supply support for C161PILMCABXUMA1 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, founded in 1999 as a spin-off from Siemens.

The C161PI belongs to the C166 microcontroller family, designed specifically for cost-sensitive, real-time embedded control applications in industrial automation and motor control where deterministic timing and peripheral integration outweigh raw processing power.

FAQ

What is the maximum operating frequency supported by the C161PILMCABXUMA1?

The C161PILMCABXUMA1 achieves 25 MHz CPU clock frequency using its internal PLL with external crystal inputs between 5 MHz and 10 MHz. The PLL supports multiplication ratios of 1.5×, 2×, 2.5×, 3×, 4×, or 5×, allowing stable 25 MHz operation from a 5 MHz crystal. AC timing specifications confirm 80 ns instruction cycle time at this frequency.

Does the C161PILMCABXUMA1 support in-system programming (ISP)?

No-the C161PILMCABXUMA1 does not support ISP. It features an on-chip bootstrap loader that enables firmware updates via UART after initial programming, but requires external programming hardware (e.g., Infineon's DASL programmer) for first-time ROM loading. Mask-ROM variants like this part are programmed during wafer fabrication and cannot be reprogrammed in-circuit.

How many analog input channels does the integrated ADC support?

The C161PILMCABXUMA1 integrates a 10-bit successive-approximation ADC with four dedicated analog input channels: AN0 through AN3, mapped to pins P5.0–P5.3. These pins are input-only with Schmitt-trigger characteristics and share physical connections with Port 5, limiting simultaneous digital use of those pins when ADC is active.

Is the C161PILMCABXUMA1 pin-compatible with the earlier C161RI?

Yes-the C161PILMCABXUMA1 is a direct functional and pin-compatible successor to the C161RI. Infineon explicitly states in the 1999-07 datasheet that the C161PI replaces the C161RI, with identical pinout, memory map, and instruction set. Key improvements include faster ADC (7.8 µs vs. 12 µs), updated PLL description, and revised absolute maximum ratings.