Infineon Technologies C161KLMHABXUMA1

Overview

C161KLMHABXUMA1 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, 1 KB on-chip IRAM, dual serial channels (asynchronous/synchronous), and two general-purpose timer units with three timers total. It operates from 4.5–5.5 V and uses an 80-pin MQFP package.

For engineers reviewing the C161KLMHABXUMA1 datasheet, C161KLMHABXUMA1 pinout, C161KLMHABXUMA1 application, or C161KLMHABXUMA1 equivalent, key selection considerations include its 20 MHz max operating frequency (HA design step), 2-chip-select interface for external memory expansion, 4-channel external interrupt capability, and support for idle/power-down low-power modes in industrial motor control and power supply management systems.

Technical Context

The C161KLMHABXUMA1 implements the C166 CPU core with register-based architecture, single-cycle context switching, and enhanced Boolean bit manipulation instructions optimized for real-time control firmware. Its peripheral event controller (PEC) enables interrupt-driven, single-cycle data transfers across eight channels, decoupling CPU load from I/O servicing.

It supports multiple clock generation modes-including prescaler-divided internal oscillator and direct external clock input-and provides programmable bus timing for external memory access with demultiplexed 16-bit address/data bus capability. The device includes a programmable watchdog timer and bidirectional reset functionality with NMI support.

Key Specifications

Pinout & Package

Package: 80-pin MQFP (0.65 mm pitch), thermally enhanced plastic quad flat pack suitable for surface-mount reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with C161KLMHABXUMA1, the C167CR-LM adds CAN and doubles IRAM but increases BOM cost and layout complexity; the SAB-C161K-L25M offers +5 MHz headroom at same pinout but requires stricter power delivery and clock routing - both demand PCB redesign validation.

Availability

C161KLMHABXUMA1 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 and long-term lifecycle support.

Supply support for C161KLMHABXUMA1 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 microcontrollers, with global R&D and manufacturing infrastructure.

The C166 family - including the C161K derivative - was engineered for deterministic real-time control in industrial automation, power conversion, and motor drive applications where predictable interrupt latency and peripheral integration are critical.

FAQ

What is the maximum operating frequency supported by C161KLMHABXUMA1?

The C161KLMHABXUMA1 is rated for a maximum operating frequency of 20 MHz, as confirmed in Table 1 (Derivative Synopsis) of the V2.0 datasheet. This applies to the HA design step and assumes operation within the specified 4.5–5.5 V supply range and industrial temperature grade. Exceeding 20 MHz may result in timing violations or undefined behavior.

Does C161KLMHABXUMA1 include on-chip flash or ROM memory?

No, the C161KLMHABXUMA1 contains no on-chip non-volatile program memory. It relies on external code storage via its 16-bit multiplexed bus interface (using EA pin control). On-chip memory consists solely of 1 KB of RAM (IRAM) and 1 KB of special function register (SFR) space. Bootloader execution requires external EPROM or Flash.

Can C161KLMHABXUMA1 operate from a 3.3 V supply?

No - the C161KLMHABXUMA1 is a 5 V-only device. Its ordering code suffix "LM" denotes 4.5–5.5 V operation. The 3 V variants (e.g., LM3V) are separate part numbers with different internal voltage regulators and are not interchangeable. Using 3.3 V will cause functional failure or permanent damage.

Is there hardware CAN interface support on this microcontroller?

No, the C161KLMHABXUMA1 does not include a CAN controller or transceiver. CAN capability was introduced in later derivatives like the C167CR. This device provides two serial channels supporting UART, SPI, and synchronous protocols only - CAN implementation would require external CAN controller ICs and associated physical layer components.