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Infineon Technologies C161KLM3VHAFXUMA1
- Part No.:
- C161KLM3VHAFXUMA1
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
C161KLM3VHAFXUMA1.pdf
- Description:
- IC MCU 16BIT ROMLESS 80MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,439
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Product details
Overview
C161KLM3VHAFXUMA1 from Infineon Technologies is a 16-bit single-chip microcontroller in the C166 family, designed for cost-sensitive embedded control applications operating at 20 MHz with 3.0–3.6 V supply. It integrates 1 KB on-chip IRAM, two general-purpose timer units (3 timers total), two serial channels (asynchronous/synchronous), and supports up to 63 GPIO lines in an 80-pin MQFP package.
For engineers reviewing the C161KLM3VHAFXUMA1 datasheet, C161KLM3VHAFXUMA1 pinout, C161KLM3VHAFXUMA1 application, or C161KLM3VHAFXUMA1 equivalent, key selection considerations include its 3 V operation, 20 MHz max frequency, 1 KB IRAM, dual serial interfaces, and programmable watchdog timer for industrial motor control, power supply monitoring, and sensor interface systems.
Technical Context
The C161KLM3VHAFXUMA1 implements a 4-stage pipelined 16-bit CPU delivering 12.5 MIPS at 20 MHz, with single-cycle context switching and register-based architecture optimized for real-time interrupt handling. Its peripheral event controller (PEC) enables interrupt-driven, single-cycle data transfers across 8 channels.
It features a bidirectional reset input (RSTIN/RSTOUT), open-drain capability on Port 2 and Port 3 pins, and supports both multiplexed and demultiplexed external bus configurations with two chip-select signals and 4 external interrupt inputs - all configured for low-voltage 3 V operation without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | C166-family 16-bit pipelined CPU with 4-stage pipeline and Boolean bit manipulation support |
| Max Clock Frequency | 20 MHz - defines maximum instruction throughput and real-time response latency |
| Supply Voltage | 3.0–3.6 V - enables direct integration into 3 V system rails without regulators |
| On-Chip RAM | 1 KB IRAM - sufficient for small RTOS stacks and local variable storage in compact firmware |
| Timers | One timer unit with 3 timers - supports PWM generation, input capture, and time-base scheduling |
| Serial Interfaces | Two channels: UART + synchronous SPI-like (SCLK, MRST, MTSR) - enables dual-protocol communication |
| External Bus | Two chip-selects, 4 external interrupts, 16-bit address/data multiplexing - supports simple memory-mapped peripherals |
| Package | 80-pin MQFP, 0.65 mm pitch - surface-mount compatible with standard reflow profiles |
Pinout & Package
Package: 80-pin MQFP (Metric Quad Flat Package), 0.65 mm lead pitch, body size 14 × 20 mm, thermally enhanced for industrial ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply (3.0–3.6 V) | Primary core and I/O voltage rail; multiple VDD pins ensure stable distribution |
| VSS | Ground reference | Dedicated ground pins per functional block reduce noise coupling in mixed-signal operation |
| XTAL1/XTAL2 | Crystal oscillator input/output | Supports external crystal (1–20 MHz) or ceramic resonator for precise clock source |
| RSTIN/RSTOUT | Bidirectional reset I/O | Allows master reset assertion and synchronized reset propagation to external peripherals |
| P0L.0–P0L.7 / AD0–AD7 | Lower byte of multiplexed address/data bus | Shared function enables compact 8-bit external memory interface with ALE strobe |
| P3.10/P3.11 | UART0 TXD0/RXD0 | Asynchronous serial interface for host debugging, sensor telemetry, or HMI communication |
| P3.13 | SCLK | Master clock output for synchronous serial peripheral interface (SPI-compatible mode) |
| P6.0/P6.1 | CS0/CS1 | Chip-select outputs for enabling external memory or peripheral devices on separate address ranges |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation | 3.0–3.6 V supply enables direct use in battery-powered or energy-efficient industrial systems |
| Single-cycle context switching | Reduces interrupt latency to predictable minimum, critical for deterministic motor control loops |
| Peripheral Event Controller (PEC) | Offloads CPU by automating 8-channel data transfers (e.g., ADC reads, DAC writes) without software intervention |
| Programmable watchdog timer | Configurable timeout period prevents system lockup in unattended embedded deployments |
| Open-drain I/O on P2/P3 | Enables wired-AND logic, level translation, and shared-bus signaling (e.g., I²C emulation, reset sharing) |
Applications
| Industrial Motor Control | Switch-Mode Power Supply Monitoring |
|---|---|
Use Scenario: Closed-loop speed regulation of BLDC motors using hall-effect feedback and PWM output. IC Role / Device Role / Timing Role: Real-time execution of PID algorithm, timer-triggered PWM generation, and UART-based fault reporting. Use Value: 20 MHz CPU and single-cycle context switching ensure sub-100 µs loop execution; 3 V operation simplifies auxiliary power design. | Use Scenario: Monitoring output voltage/current, thermal status, and fault flags in 3 V auxiliary power rails. IC Role / Device Role / Timing Role: Analog sensing via external ADC, digital signal conditioning, and serial alert transmission over UART. Use Value: Dual serial interfaces allow simultaneous telemetry upload and configuration update; low-voltage operation matches PSU control rail. |
| Smart Sensor Interface Module | Legacy Industrial Fieldbus Node |
Use Scenario: Aggregating temperature, pressure, and humidity readings from analog/digital sensors for Modbus RTU transmission. IC Role / Device Role / Timing Role: Sensor polling via GPIO/timers, data formatting, and UART-based protocol framing. Use Value: 1 KB IRAM holds protocol stack buffers; open-drain P2/P3 pins enable RS-485 half-duplex bus control without external transceivers. | Use Scenario: Bridging legacy 20 mA current-loop or RS-422 field devices to modern controllers via custom protocol translation. IC Role / Device Role / Timing Role: Bit-banged serial interface with precise timing control, GPIO-based line state detection, and watchdog-secured operation. Use Value: Programmable external bus and two chip-selects allow direct connection to discrete logic or PROM-based protocol lookup tables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| C161KLM3VHAFBMA1 | Same die, tape-and-reel packaging (vs. tray); identical electrical specs and pinout | No functional difference; suited for automated SMT assembly | Select when high-volume pick-and-place placement is required |
| C161KLM3VHAFQMA1 | Same die, QFP-80 package with different moisture sensitivity level (MSL3 vs MSL2) | Identical performance; requires adjusted reflow profile for humidity-sensitive handling | Select when conforming to specific J-STD-020 moisture classification requirements |
Compared with C161KLM3VHAFXUMA1, the BMA1 variant offers optimized logistics for SMT lines, while the QMA1 variant meets stricter moisture sensitivity protocols - both retain identical 3 V, 20 MHz, 1 KB IRAM functionality and pin compatibility.
Availability
C161KLM3VHAFXUMA1 is available at Aetrix Electronics and suitable for industrial motor control, switch-mode power supply monitoring, smart sensor interface modules, and legacy fieldbus node designs requiring stable component supply across extended production lifecycles.
Supply support for C161KLM3VHAFXUMA1 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 C161K series belongs to Infineon's legacy C166 microcontroller product line, engineered for deterministic real-time control in cost-constrained industrial equipment where 3 V operation and peripheral integration are essential.
FAQ
What is the maximum operating frequency of the C161KLM3VHAFXUMA1?
The C161KLM3VHAFXUMA1 operates at a maximum frequency of 20 MHz under 3.0–3.6 V supply conditions. This is confirmed in Table 1 of the Infineon C161K/O Data Sheet V2.0 (Jan. 2001), which lists SAF-C161K-LM3V and SAB-C161K-LM3V derivatives with 20 MHz rating and 3 V operation. The device does not support 25 MHz at 3 V.
Does the C161KLM3VHAFXUMA1 support external memory expansion?
Yes, it supports up to 4 MBytes of external address space using a programmable external bus with two chip-select signals (CS0/CS1), multiplexed or demultiplexed 8-/16-bit data bus, and configurable wait-state generation. Pin assignments for address/data lines (P0L.x/ADx, P0H.x/ADx, P1H.x/Ax) and control signals (ALE, EA, RD, WR/WRL) are defined in the MQFP pinout diagram.
Is there on-chip flash or ROM in this microcontroller?
No, the C161KLM3VHAFXUMA1 contains no on-chip non-volatile program memory. It relies on external code storage via the parallel bus interface. On-chip memory consists solely of 1 KB of RAM (IRAM). Mask-ROM versions existed (e.g., SAF-C161K-LM3V), but this ordering code denotes a ROMless variant with bootstrap loader support for external program loading.
What development tools are supported for this microcontroller?
Infineon officially supported C-compilers (e.g., Tasking C166), macro-assemblers, in-circuit emulators (e.g., Lauterbach TRACE32), evaluation boards, HLL debuggers, simulators, and programming boards. The on-chip bootstrap loader enables in-system programming via UART, eliminating need for external EPROM programmers.
C161KLM3VHAFXUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 80-QFP
- Series:
- C16xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- C166
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- EBI/EMI, SPI, UART/USART
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 63
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
C161KLM3VHAFXUMA1 FAQ
1.How can I place an order for C161KLM3VHAFXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for C161KLM3VHAFXUMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for C161KLM3VHAFXUMA1 reliable?
The price and inventory of C161KLM3VHAFXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for C161KLM3VHAFXUMA1 is usually 5 days.
3.What payment methods are accepted for C161KLM3VHAFXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for C161KLM3VHAFXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for C161KLM3VHAFXUMA1?
C161KLM3VHAFXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your C161KLM3VHAFXUMA1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for C161KLM3VHAFXUMA1?
For technical support, including C161KLM3VHAFXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your C161KLM3VHAFXUMA1 requirements.
6.How does Aetrix verify that C161KLM3VHAFXUMA1 is sourced from the original manufacturer or authorized distributors?
All C161KLM3VHAFXUMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that C161KLM3VHAFXUMA1 meets industry standards.
7.What is the process for return or replacement of C161KLM3VHAFXUMA1?
All C161KLM3VHAFXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with C161KLM3VHAFXUMA1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The C161KLM3VHAFXUMA1 part is unused and in its original packaging.
Return procedure for C161KLM3VHAFXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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