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Infineon Technologies CY9AF121LWQN-G-JNE2
- Part No.:
- CY9AF121LWQN-G-JNE2
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
CY9AF121LWQN-G-JNE2.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,568
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Product details
Overview
CY9AF121LWQN-G-JNE2 from Infineon Technologies (formerly Cypress) is a 32-bit ARM® Cortex®-M3 microcontroller with 64 KB Flash, 4 KB SRAM, 40 MHz max CPU frequency, 12-bit ADC (8 ch), and 10-bit DAC (1 ch), used in motor control and industrial embedded systems requiring integrated timing, analog conversion, and LIN/UART/I²C interfaces.
For engineers reviewing the CY9AF121LWQN-G-JNE2 datasheet, CY9AF121LWQN-G-JNE2 pinout, CY9AF121LWQN-G-JNE2 application, or CY9AF121LWQN-G-JNE2 equivalent, this page delivers verified technical context, package mapping to QFN-64, validated peripheral roles (LIN master/slave, PWM timer, RTC), and real-world selection guidance for FM3-family migration and low-power industrial controller design.
Technical Context
This MCU implements the ARM Cortex-M3 r2p1 core with nested vectored interrupt controller supporting 48 peripheral interrupts and 16 priority levels. It integrates dual watchdog timers (hardware + software), clock supervisor (CSV) for external oscillator failure detection, and 2-stage low-voltage detector (LVD1/LVD2) with interrupt and reset outputs.
The peripheral set includes eight base timers configurable as 16-/32-bit PWM/PPG/reload/PWC units, multi-function serial interface with four channels supporting UART/CSIO/LIN/I²C modes, and real-time clock with leap-year correction and date/time alarm interrupt capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 r2p1, 40 MHz max - enables deterministic real-time task scheduling in motor control loops |
| Flash Memory | 64 KB, 0-wait-state read - supports fast ISR execution and firmware updates without performance penalty |
| SRAM | 4 KB on-chip - sufficient for stack, heap, and peripheral buffer storage in standalone embedded applications |
| ADC | 12-bit, 8-channel, 0.8 μs conversion @5 V - meets resolution and speed requirements for current sensing in BLDC drives |
| DAC | 10-bit R-2R, 1 channel - provides analog reference or bias voltage generation for sensor conditioning circuits |
| LIN Support | LIN 2.1 compliant, master/slave mode, programmable break field (13–16 bit) - enables direct integration into automotive body electronics networks |
| Power Supply | 2.7 V to 5.5 V - allows operation across industrial 3.3 V and legacy 5 V bus systems without level-shifting |
Pinout & Package
Package: QFN-64 (10 mm × 10 mm, 0.5 mm pitch, exposed thermal pad). Pin assignment conforms to CY9A120L Series Pin Assignment (Document 002-05669 Rev. *D, Page 8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC / VSS | Power supply / Ground | Multiple dedicated pins ensure stable core/peripheral rail decoupling and low-noise analog domain separation |
| XTAL / EXTAL | Main crystal oscillator input/output | Supports 4–48 MHz external crystal - enables precise timing for communication baud rates and PWM carrier generation |
| RTCXTAL / RTCXTAL | 32.768 kHz RTC crystal terminals | Enables autonomous timekeeping during Stop/RTC low-power modes with ±20 ppm accuracy |
| PA0–PA15, PB0–PB15, etc. | Multi-function GPIO with port relocate | 51 total high-speed I/O pins; per-pin pull-up and direct read capability simplify hardware abstraction layer development |
| TXD0 / RXD0 | UART0 transmit/receive | Full-duplex double-buffered interface with parity/framing error detection - suitable for debug console and host communication |
| CSIO0_SCLK / CSIO0_MOSI | CSIO0 clock/data output | Configurable as SPI master/slave - supports sensor interface or flash memory expansion without additional logic |
Key Features
| Feature | Design Value |
|---|---|
| IGBT Mode Peripheral Set | PWM output + dead-time insertion + DTIF emergency stop interrupt - enables safe, certified motor gate drive without external logic |
| Real-Time Clock (RTC) | Year/Month/Day/Hour/Minute/Second/Weekday with leap-year correction and alarm interrupt - eliminates need for external RTC IC in data loggers |
| Multi-function Serial Interface | Four independent channels, each switchable between UART/CSIO/LIN/I²C - reduces BOM count by consolidating protocol-specific PHYs |
| Low-Power Modes | Sleep/Timer/RTC/Stop with sub-μA RTC current - extends battery life in wireless sensor nodes and portable HMI devices |
| Unique Device ID | 41-bit factory-programmed value - enables secure device authentication and firmware binding in IoT edge nodes |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blowers and pump controllers. IC Role / Device Role / Timing Role: Real-time PWM waveform generator with dead-time control and A/D-triggered current feedback loop. Use Value: Integrated IGBT mode eliminates external gate driver logic and reduces PCB area by 35% versus discrete solutions. | Use Scenario: Door module node communicating over LIN bus with central body controller. IC Role / Device Role / Timing Role: LIN 2.1 master node managing window lift, mirror fold, and interior lighting functions. Use Value: On-chip LIN transceiver support and programmable break field enable compliance with OEM-specific physical layer requirements. |
| Smart Energy Meters | Programmable Logic Controllers (PLC) |
Use Scenario: Tamper-resistant electricity meter with time-of-use billing and RTC-backed data logging. IC Role / Device Role / Timing Role: Secure timekeeping engine with calendar-aware interrupt and flash-protected firmware update handler. Use Value: Built-in RTC with leap-year correction and LVD2 reset ensures accurate billing intervals even after power interruption. | Use Scenario: Compact remote I/O module for factory automation with analog sensor inputs and digital actuator outputs. IC Role / Device Role / Timing Role: Analog front-end controller with 12-bit ADC scanning, 10-bit DAC output, and isolated UART diagnostics. Use Value: Simultaneous 8-channel ADC scan with FIFO buffering achieves 10 kSPS effective throughput for vibration monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 32-bit ARM Cortex-M3 microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F103C8T6 | 72 MHz Cortex-M3, 64 KB Flash, no LIN, only USART (no native LIN framing) | Lacks hardware LIN 2.1 support; requires software bit-banging or external transceiver | Select when cost-sensitive general-purpose control is needed and LIN is not required |
| RL78/F13 | 16-bit RL78 core, 128 KB Flash, built-in LIN, but no Cortex-M3 instruction compatibility | Lower performance (24 MHz), different toolchain and RTOS porting effort | Select for ultra-low-power (<1 μA RTC mode) and legacy Renesas ecosystem continuity |
Compared with STM32F103C8T6 and RL78/F13, CY9AF121LWQN-G-JNE2 uniquely combines ARM Cortex-M3 architecture, native LIN 2.1 hardware, and IGBT-mode peripherals - making it optimal for cost-constrained, safety-aware motor control where protocol offload and deterministic timing are critical.
Availability
CY9AF121LWQN-G-JNE2 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart energy metering, and programmable logic controller applications requiring stable component supply and long-term lifecycle support.
Supply support for CY9AF121LWQN-G-JNE2 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 is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive, and industrial control ICs with strong focus on reliability and functional safety.
CY9AF121LWQN-G-JNE2 belongs to the FM3 family of 32-bit microcontrollers, designed specifically for cost-optimized, low-power embedded control in motor drives, building automation, and automotive subsystems.
FAQ
Is CY9AF121LWQN-G-JNE2 pin-compatible with other CY9A120L series devices?
Yes, CY9AF121LWQN-G-JNE2 uses the same QFN-64 package and shares identical pin assignment with CY9A120L-series members such as CY9A121LWQN-G-JNE2 and CY9A122LWQN-G-JNE2. Pin functions are consistent across the series, enabling drop-in replacement within the same memory configuration tier.
Does this MCU support JTAG debugging?
Yes, CY9AF121LWQN-G-JNE2 features a Serial Wire JTAG Debug Port (SWJ-DP) compliant with ARM CoreSight standards. It supports full boundary-scan, real-time trace, and flash programming via standard tools including Segger J-Link and Cypress Programmer.
What is the maximum operating temperature range for this part?
CY9AF121LWQN-G-JNE2 is rated for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 12.2 "Recommended Operating Conditions" of datasheet 002-05669 Rev. *D, and applies to all QFN-64 packaged variants in the CY9A120L series.
Can the internal 10-bit DAC drive an external op-amp directly?
Yes, the R-2R 10-bit DAC output is buffered and specified for driving loads ≥10 kΩ. It can directly interface with high-input-impedance op-amps for sensor biasing or reference voltage generation without external amplification, per Section 12.6 of the datasheet.
CY9AF121LWQN-G-JNE2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 64-WFQFN Exposed Pad
- Series:
- FM3 MB9A120L
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 40MHz
- Connectivity:
- CSIO, I2C, LINbus, SPI, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 8x12b; D/A 1x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY9AF121LWQN-G-JNE2 FAQ
1.How can I place an order for CY9AF121LWQN-G-JNE2 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY9AF121LWQN-G-JNE2 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 CY9AF121LWQN-G-JNE2 reliable?
The price and inventory of CY9AF121LWQN-G-JNE2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY9AF121LWQN-G-JNE2 is usually 5 days.
3.What payment methods are accepted for CY9AF121LWQN-G-JNE2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY9AF121LWQN-G-JNE2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY9AF121LWQN-G-JNE2?
CY9AF121LWQN-G-JNE2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY9AF121LWQN-G-JNE2 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 CY9AF121LWQN-G-JNE2?
For technical support, including CY9AF121LWQN-G-JNE2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY9AF121LWQN-G-JNE2 requirements.
6.How does Aetrix verify that CY9AF121LWQN-G-JNE2 is sourced from the original manufacturer or authorized distributors?
All CY9AF121LWQN-G-JNE2 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 CY9AF121LWQN-G-JNE2 meets industry standards.
7.What is the process for return or replacement of CY9AF121LWQN-G-JNE2?
All CY9AF121LWQN-G-JNE2 units undergo pre-shipment inspection (PSI). If there is an issue with CY9AF121LWQN-G-JNE2, 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 CY9AF121LWQN-G-JNE2 part is unused and in its original packaging.
Return procedure for CY9AF121LWQN-G-JNE2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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