Infineon Technologies C161OLMHAFXQMA1

Overview

C161OLMHAFXQMA1 from Infineon Technologies is a 16-bit single-chip microcontroller in the C166 family, designed for cost-sensitive embedded control applications. It features a 4-stage pipeline CPU delivering 12.5 MIPS at 25 MHz, 2 KB on-chip IRAM, dual multi-functional timer units (5 timers total), two serial channels (asynchronous/synchronous/HS-synchronous), and operates from 4.5–5.5 V supply. Used in industrial motor control and power supply management systems.

For engineers reviewing the C161OLMHAFXQMA1 datasheet, C161OLMHAFXQMA1 pinout, C161OLMHAFXQMA1 application, or C161OLMHAFXQMA1 equivalent, key selection criteria include its 80-pin MQFP package, 25-MHz timing granularity (2 ns), 16-priority interrupt system with 40-ns sample rate, and support for multiplexed/demultiplexed 8-/16-bit external buses with four chip-selects.

Technical Context

The C161OLMHAFXQMA1 implements a register-based 16-bit CPU with single-cycle context switching, enhanced Boolean bit manipulation, and HLL/OS-supporting instructions. Its peripheral event controller (PEC) enables interrupt-driven, single-cycle data transfers across eight channels.

It supports multiple clock generation modes-including prescaler division and direct external clock input-and includes a programmable watchdog timer, idle/power-down modes, and bootstrap loader functionality. The device integrates SAF-C161O-L25M derivative features: 25 MHz max operation, 2 KB IRAM, 4 chip-selects, 7 external interrupt inputs, and CAPIN-capable capture input on P3.2.

Key Specifications

Pinout & Package

80-pin MQFP (Metric Quad Flat Package) with 0.65 mm lead pitch, thermally optimized for industrial ambient conditions (–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 SAB-C161O-L25M, C161OLMHAFXQMA1 offers RoHS-compliant lead-free packaging without performance trade-off; versus C167CR-LM, it provides lower-cost entry-level control with dedicated CAPIN for time-critical edge capture - ideal where precision timing outweighs raw compute headroom.

Availability

C161OLMHAFXQMA1 is available at Aetrix Electronics and suitable for industrial motor control, switch-mode power supply design, and programmable logic controller I/O modules requiring stable component supply across extended product lifecycles.

Supply support for C161OLMHAFXQMA1 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 C161O derivative - was engineered for deterministic real-time control in cost-constrained industrial environments, emphasizing interrupt latency, peripheral integration, and long-term supply stability.

FAQ

What is the maximum operating temperature range for C161OLMHAFXQMA1?

The C161OLMHAFXQMA1 is rated for industrial temperature operation from –40°C to +85°C. This range is validated per Infineon's qualification standards and applies to all electrical specifications in the datasheet. Thermal derating is not required within this envelope, and the device maintains full timing compliance at the upper limit when powered at 4.5–5.5 V.

Does C161OLMHAFXQMA1 support in-system programming (ISP)?

No - C161OLMHAFXQMA1 does not support ISP. It contains mask-ROM for program storage, meaning firmware is fixed at fabrication. However, it includes an on-chip bootstrap loader that enables serial reprogramming of external Flash via UART, provided the target memory supports command-based write protocols and is mapped into the external bus space.

Can the PEC transfer data between external peripherals and internal RAM without CPU involvement?

Yes - the Peripheral Event Controller (PEC) can autonomously move data between external memory-mapped peripherals (e.g., ADC registers at 0x8000) and internal IRAM (e.g., 0x0000–0x07FF) using channel descriptors. Each transfer completes in one bus cycle per word, with no CPU cycles consumed beyond initial setup and completion interrupt servicing.

Is the CAPIN function on P3.2 compatible with 3.3 V logic levels?

No - CAPIN on P3.2 is TTL/CMOS 5 V compatible only. Its input threshold is defined relative to VDD (4.5–5.5 V), with VIH ≥ 2.0 V and VIL ≤ 0.8 V. Applying 3.3 V signals risks marginal recognition; level-shifting is required when interfacing with 3.3 V sensors or FPGAs.