Infineon Technologies CY8C4127AZQ-S455

Overview

CY8C4127AZQ-S455 from Infineon Technologies (acquired Cypress Semiconductor) is a programmable System-on-Chip (PSoC 4100S Plus) integrating an Arm® Cortex™-M0+ CPU, CapSense® capacitive sensing, CAN 2.0B interface, 12-bit 1-Msps SAR ADC, and eight 16-bit TCPWM blocks. It operates from 1.71–5.5 V, delivers 48 MHz performance, and supports Deep Sleep mode with 2.5 µA system current while maintaining analog functionality - deployed in industrial HMI, motor control interfaces, and secure embedded touch systems.

For engineers reviewing the CY8C4127AZQ-S455 datasheet, CY8C4127AZQ-S455 pinout, CY8C4127AZQ-S455 application, or CY8C4127AZQ-S455 equivalent, key selection criteria include its integrated CAN 2.0B block with TTCAN support, programmable analog (dual opamps + comparator + IDACs), CapSense sigma-delta architecture with >5:1 SNR, and PSoC Creator-based hardware/firmware co-design capability.

Technical Context

The device implements a tightly coupled MCU subsystem with 128 KB flash (Read Accelerator enabled), 16 KB zero-wait-state SRAM, and an 8-channel DMA engine. Its clock architecture includes a 4–33 MHz ECO, PLL for 48 MHz generation, 32-kHz WCO, ±2% IMO, and 32-kHz ILO - enabling precise timing across active, sleep, and Deep Sleep modes.

Analog resources comprise two reconfigurable opamps (operable in Deep Sleep), a 12-bit SAR ADC with differential/single-ended input and channel sequencer, two low-power comparators, and a capacitance-sensing block supporting 10-bit single-slope ADC. Digital flexibility is delivered via five reconfigurable SCBs (I²C/SPI/UART), eight TCPWM blocks with center-aligned/PWM/quad-decoder modes, and programmable logic blocks for Boolean port operations.

Key Specifications

Pinout & Package

Package: 64-pin TQFP (0.5 mm pitch), RoHS-compliant, moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C4127AZQ-S455, CY8C4247AZI-M485 trades CAN for USB and memory headroom, while STM32G474RET6 offers stronger compute but lacks native CapSense and consumes >4× more current in low-power monitoring - making CY8C4127AZQ-S455 optimal for CAN-linked, touch-centric, ultra-low-power embedded controllers.

Availability

CY8C4127AZQ-S455 is available at Aetrix Electronics and suitable for industrial HMI, motor control interfaces, secure IoT edge nodes, and medical device user interfaces requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across manufacturing lots.

Supply support for CY8C4127AZQ-S455 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 acquired Cypress Semiconductor in 2020 and now develops, manufactures, and supports the PSoC family - delivering programmable analog-digital mixed-signal solutions for embedded control and human interface applications.

CY8C4127AZQ-S455 belongs to the PSoC 4100S Plus product line, designed specifically for cost-sensitive, low-power applications demanding integrated capacitive sensing, CAN connectivity, and flexible reconfigurable peripherals in a single chip.

FAQ

Does CY8C4127AZQ-S455 support hardware-based secure boot?

No - CY8C4127AZQ-S455 does not implement a dedicated secure boot ROM or cryptographic signature verification engine. It supports flash protection and debug disable to prevent unauthorized access, but secure boot must be implemented in firmware using the on-chip TRNG for key generation and software-based signature checking against stored public keys.

What is the maximum operating temperature for continuous Deep Sleep mode?

The device is rated for industrial temperature range (–40°C to +85°C). All specifications, including Deep Sleep current of 2.5 µA, are guaranteed across this full range per the datasheet's Device Level Specifications table (page 15, Rev. *H). No derating is required up to +85°C ambient.

Can the SAR ADC perform simultaneous sampling on multiple channels?

No - the 12-bit SAR ADC has a single conversion core with a multiplexer. It supports sequential sampling via the channel sequencer with automatic averaging, but true simultaneous sampling across multiple inputs is not supported. For synchronized acquisition, external analog multiplexing or parallel ADCs are required.

Is the CAN block compatible with ISO 11898-2 physical layer?

No - the CAN block implements only the protocol layer (CAN 2.0B). An external CAN transceiver (e.g., TJA1042, SN65HVD230) is required to interface with ISO 11898-2 compliant physical buses. The device provides CAN TX/RX signals directly to the transceiver's input/output pins.