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Infineon Technologies C161KLMHAFXQMA1
- Part No.:
- C161KLMHAFXQMA1
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
C161KLMHAFXQMA1.pdf
- Description:
- IC MCU 16BIT ROMLESS 80MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,692
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Product details
Overview
C161KLMHAFXQMA1 from Infineon Technologies is a 16-bit single-chip microcontroller in the C166 family, featuring 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 targets cost-sensitive industrial control and embedded automation systems.
For engineers reviewing the C161KLMHAFXQMA1 datasheet, C161KLMHAFXQMA1 pinout, C161KLMHAFXQMA1 application, or C161KLMHAFXQMA1 equivalent, key selection criteria include its 80-pin MQFP package, 20 MHz max operating frequency (design step HA), 2 chip-select outputs, 4 external interrupt inputs, and support for 3 V/5 V supply variants - all confirmed in Infineon's V2.0 (Jan. 2001) datasheet.
Technical Context
The C161KLMHAFXQMA1 implements a register-based 16-bit CPU with single-cycle context switching, Boolean bit manipulation extensions, and HLL/OS-supporting instructions. Its memory architecture provides 16 MByte linear address space, with programmable external bus timing and demultiplexed/multiplexed 8-/16-bit data bus options.
Peripheral integration includes an 8-channel Peripheral Event Controller (PEC) for interrupt-driven single-cycle data transfers, a programmable watchdog timer, idle/power-down modes, and bidirectional reset functionality. Clock generation supports prescaler division or direct external clock input up to 25 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | C166-family 16-bit RISC-like core with 4-stage pipeline and 80 ns instruction cycle at 25 MHz |
| Max Operating Frequency | 20 MHz (design step HA, confirmed in Derivative Synopsis Table 1) |
| On-Chip RAM | 1 KB IRAM - sufficient for real-time task stacks and small data buffers without external SRAM |
| External Bus Interface | Two chip-select signals (CS0, CS1) - supports dual peripheral or memory mapping in compact systems |
| Interrupt System | 16-priority-level, 20-source interrupt controller with 40 ns sample rate - enables deterministic response in motor control loops |
| I/O Capability | Up to 63 general-purpose I/O lines across Ports 0–6 - configurable as input/output with open-drain support on P2/P3/P6 |
| Power Supply | 4.5–5.5 V operation - compatible with standard TTL/CMOS logic rails and legacy industrial power domains |
Pinout & Package
Package: 80-pin MQFP (0.65 mm pitch), lead-free per RoHS-compliant manufacturing (Infineon standard for 2001-era industrial-grade parts).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (pins 41, 45, 46, 79) | Primary power supply | 4.5–5.5 V core and I/O rail; multiple pins reduce impedance and improve noise immunity |
| VSS (pins 1, 20, 47, 77) | Ground reference | Dedicated ground pins per quadrant minimize return-path inductance in high-speed digital operation |
| XTAL1 / XTAL2 (pins 2, 80) | Crystal oscillator interface | Supports fundamental-mode quartz crystals up to 25 MHz; internal feedback resistor enables minimal external components |
| P0L.0–P0L.7 / P0H.0–P0H.7 (pins 29–36, 38–40, 42–44, 46–47) | Lower/upper byte of 16-bit multiplexed AD bus | Address/data time-multiplexed interface for external memory or peripherals; requires external latch on ALE |
| EA (pin 28) | External access enable | Low = fetch code from external memory; high = execute from on-chip ROM (if present) or internal vectors |
| RSTIN / RSTOUT (pins 65, 66) | Bidirectional reset I/O | Accepts external reset pulse; drives reset signal to other system components when configured as output |
| P3.10 / P3.11 (pins 73, 72) | UART0 transmit/receive | Full-duplex asynchronous serial interface - supports RS-232 level-shifting with external transceivers |
| CS0 / CS1 (pins 69, 70) | Chip select outputs | Active-low enables for two independent external devices; timing programmable via BUSCON registers |
Key Features
| Feature | Design Value |
|---|---|
| Single-cycle context switching | Enables deterministic RTOS task scheduling with ≤1 µs latency between interrupt and handler execution |
| Peripheral Event Controller (PEC) | 8-channel DMA-like engine that moves data without CPU intervention - frees CPU for computation in sensor acquisition |
| Programmable watchdog timer | Configurable timeout period and reset/restart behavior - critical for fail-safe recovery in unattended equipment |
| Open-drain I/O on P2/P3/P6 | Allows wired-AND bus signaling and level translation - supports shared interrupt lines and I²C-compatible protocols |
| Idle and power-down modes | Reduces current draw to <100 µA in power-down - extends battery life in portable diagnostic tools |
Applications
| Industrial Motor Control | Factory Automation I/O Module |
|---|---|
Use Scenario: Closed-loop speed regulation of 3-phase AC induction motors using PWM outputs and analog feedback. IC Role / Device Role / Timing Role: Real-time controller executing PID algorithm at 1 kHz, managing timer-triggered ADC sampling and gate-driver PWM updates. Use Value: 20 MHz CPU clock and 40 ns interrupt sampling ensure jitter-free timing for 10 µs PWM resolution and synchronized current sensing. | Use Scenario: Distributed digital input/output expansion node communicating via RS-485 to PLC master. IC Role / Device Role / Timing Role: Protocol handler and I/O aggregator - receives Modbus RTU frames, validates CRC, and updates 32-channel status registers. Use Value: Dual UARTs allow simultaneous host communication and local debug port; 63 GPIOs support mixed sourcing/sinking for 24 V DC sensors and actuators. |
| Legacy Equipment Retrofit Controller | Test & Measurement Front-End |
Use Scenario: Replacement controller for aging benchtop power supplies requiring analog voltage/current setpoint control and safety interlocks. IC Role / Device Role / Timing Role: System supervisor - monitors front-panel buttons, reads DACs, drives LED indicators, and asserts hardware shutdown on overvoltage. Use Value: Bidirectional reset I/O allows coordinated power sequencing with external supervisors; 1 KB IRAM stores calibration coefficients and fault logs. | Use Scenario: Signal conditioning and digitization module for oscilloscope auxiliary channels (temperature, humidity, auxiliary triggers). IC Role / Device Role / Timing Role: Data acquisition coordinator - triggers ADC conversions via timer match events and buffers samples using PEC transfers to internal RAM. Use Value: PEC offloads 95% of data movement overhead; 16 MByte address space permits future expansion with external FIFO or flash storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAB-C161K-LM | Same die, identical pinout and electrical specs; differs only in marking and packaging (tape-and-reel vs. tray) | No functional difference - interchangeable in PCB layout and firmware | Select based on logistics preference and volume pricing tiers |
| C167CR-LM | Enhanced C166 derivative with 2 KB IRAM, 4 CS outputs, and SAF-CAPIN support - not pin-compatible | Required for designs needing >1 KB RAM or additional chip selects for multi-peripheral systems | Choose only if upgrading memory or peripheral count; requires PCB redesign |
Compared with SAB-C161K-LM, C161KLMHAFXQMA1 offers identical functionality with traceability to Infineon's HA design step; versus C167CR-LM, it trades RAM and chip-select capacity for lower BOM cost and footprint - optimal for fixed-function, resource-constrained controllers.
Availability
C161KLMHAFXQMA1 is available at Aetrix Electronics and suitable for industrial motor control, factory automation I/O modules, and legacy equipment retrofit requiring stable component supply and long-term obsolescence management.
Supply support for C161KLMHAFXQMA1 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 C161K/O series belongs to Infineon's C166 microcontroller family, designed specifically for cost-sensitive, real-time embedded applications demanding deterministic interrupt response, integrated peripherals, and robust industrial temperature operation.
FAQ
What is the maximum operating frequency supported by C161KLMHAFXQMA1?
The C161KLMHAFXQMA1 is rated for a maximum operating frequency of 20 MHz, as specified in Infineon's Derivative Synopsis (Table 1, V2.0 datasheet). Although the C161K-L25M variant supports 25 MHz, this specific ordering code corresponds to the 20 MHz HA design step and must not be operated beyond that limit without validation.
Does C161KLMHAFXQMA1 include on-chip flash or ROM memory?
No, the C161KLMHAFXQMA1 contains no on-chip non-volatile program memory. It relies on external code storage via its 16 MByte address space and EA pin control. On-chip resources are limited to 1 KB IRAM and 1024 bytes of special function registers - consistent with mask-ROM or EPROM-based C161K derivatives of this era.
Can C161KLMHAFXQMA1 operate from a 3.3 V supply?
No - C161KLMHAFXQMA1 is specified only for 4.5–5.5 V operation. The 3 V variants (e.g., C161K-LM3V) use different internal voltage regulation and are distinct ordering codes. Applying 3.3 V will result in undefined behavior, insufficient noise margin, and potential failure to meet timing specifications.
Is the C161KLMHAFXQMA1 pin-compatible with C161O derivatives?
No - while sharing the same 80-pin MQFP package, C161KLMHAFXQMA1 lacks several C161O-specific signals including CAPIN, T4EUD, EX5IN–EX7IN, and two additional chip-select outputs (CS2, CS3). Pinouts differ in Port 1 high-byte, Port 5, and Port 6 assignments; PCB layout is not interchangeable without redesign.
C161KLMHAFXQMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 80-QFP
- Series:
- C16xx
- Packaging:
- Tray
- 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):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
C161KLMHAFXQMA1 FAQ
1.How can I place an order for C161KLMHAFXQMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for C161KLMHAFXQMA1 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 C161KLMHAFXQMA1 reliable?
The price and inventory of C161KLMHAFXQMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for C161KLMHAFXQMA1 is usually 5 days.
3.What payment methods are accepted for C161KLMHAFXQMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for C161KLMHAFXQMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for C161KLMHAFXQMA1?
C161KLMHAFXQMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your C161KLMHAFXQMA1 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 C161KLMHAFXQMA1?
For technical support, including C161KLMHAFXQMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your C161KLMHAFXQMA1 requirements.
6.How does Aetrix verify that C161KLMHAFXQMA1 is sourced from the original manufacturer or authorized distributors?
All C161KLMHAFXQMA1 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 C161KLMHAFXQMA1 meets industry standards.
7.What is the process for return or replacement of C161KLMHAFXQMA1?
All C161KLMHAFXQMA1 units undergo pre-shipment inspection (PSI). If there is an issue with C161KLMHAFXQMA1, 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 C161KLMHAFXQMA1 part is unused and in its original packaging.
Return procedure for C161KLMHAFXQMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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