Infineon Technologies CY9AF421KPMC1-G-JNE2

Overview

CY9AF421KPMC1-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, CAN 2.0A/B interface (1 Mbps), and 12-bit ADC (0.8 μs conversion @5 V), designed for embedded motor control and industrial automation systems.

For engineers reviewing the CY9AF421KPMC1-G-JNE2 datasheet, CY9AF421KPMC1-G-JNE2 pinout, CY9AF421KPMC1-G-JNE2 application, or CY9AF421KPMC1-G-JNE2 equivalent, key selection criteria include its dual watchdog timers (HW/SW), RTC with leap-year support, 51 GPIOs in 64-pin LQFP, IGBT-mode PWM with dead-time control, and 2.7–5.5 V wide supply range.

Technical Context

The device implements an ARM Cortex-M3 r2p1 core with NVIC supporting 48 peripheral interrupts and 16 priority levels, paired with a 24-bit SysTick timer for RTOS scheduling. Its clock system integrates five sources - including 4–48 MHz main oscillator, 32.768 kHz sub-clock, and dual CR oscillators - supervised by Clock Super Visor (CSV) for fail-safe reset on external clock anomaly.

Peripheral integration includes one CAN channel with 32-message buffer, four multi-function serial interfaces (UART/CSIO/LIN/I²C), eight-channel 12-bit ADC with scan/priority modes and FIFO, and a 10-bit R-2R DAC. Low-power operation spans Sleep, Timer, RTC, and Stop modes, with hardware watchdog active even in Stop mode via 100 kHz CR oscillator.

Key Specifications

Pinout & Package

This device is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad, optimized for industrial PCB assembly and thermal dissipation in motor drive applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C8T6 and RA4M1, CY9AF421KPMC1-G-JNE2 uniquely balances CAN 2.0B support, RTC calendar, and IGBT-mode PWM in a cost-optimized 64-pin LQFP - making it optimal for established industrial motor and body electronics designs where CAN 2.0 suffices and BOM simplicity is critical.

Availability

CY9AF421KPMC1-G-JNE2 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart energy meters, and compact PLC modules requiring stable component supply across extended product lifecycles.

Supply support for CY9AF421KPMC1-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 MCUs, and industrial control solutions.

This part belongs to the FM3 family of 32-bit ARM Cortex-M3 microcontrollers, engineered specifically for cost-sensitive, real-time embedded applications demanding integrated analog peripherals, CAN connectivity, and robust low-power operation in harsh environments.

FAQ

Is CY9AF421KPMC1-G-JNE2 pin-compatible with other CY9A420L series devices?

Yes - it shares identical 64-pin LQFP mechanical footprint and core peripheral pin mapping with CY9A420L-series variants such as CY9AF420KPMC1-G-JNE2. However, specific peripheral enablement (e.g., CAN channel count, ADC channel availability) varies by suffix; always verify pin function tables in the FM3 Peripheral Manual before substitution.

Does this MCU support JTAG debugging in all low-power modes?

No - SWJ-DP (Serial Wire JTAG Debug Port) remains accessible only in Active and Sleep modes. Debug access is disabled in Timer, RTC, and Stop modes to preserve power integrity; wake-up via external interrupt or RTC alarm is required to re-enable debugging.

What is the maximum operating temperature range for CY9AF421KPMC1-G-JNE2?

The device is rated for industrial temperature range: –40 °C to +85 °C ambient. This is validated per JEDEC JESD22-A104 and confirmed in Section 12.2 (Recommended Operating Conditions) of datasheet 002-05659 Rev. *D, with derating applied above 70 °C for sustained 40 MHz operation.

Can the internal 10-bit DAC drive a 1 kΩ load directly?

No - the DAC output is buffered but not rail-to-rail; typical output impedance is ~100 Ω, and loading beyond 100 µA causes measurable gain error. For 1 kΩ loads, use an external op-amp buffer to maintain linearity and full-scale accuracy as specified in Section 12.6 of the datasheet.