Infineon Technologies CY8C3445AXI-104

Overview

CY8C3445AXI-104 from Infineon Technologies (formerly Cypress Semiconductor) is a programmable System-on-Chip (PSoC® 3) integrating an 8-bit 8051 CPU, configurable analog/digital peripherals, 64 KB flash, 8 KB RAM, and full CAN 2.0b interface. It operates from 1.71–5.5 V at up to 50 MHz and supports CapSense® for touch interfaces in industrial HMI applications.

For engineers reviewing the CY8C3445AXI-104 datasheet, CY8C3445AXI-104 pinout, CY8C3445AXI-104 application, or CY8C3445AXI-104 equivalent, key selection criteria include its 48-pin SSOP package, 24-channel DMA, USB Full-Speed peripheral, 16 Rx/8 Tx CAN buffers, and ultra-low-power hibernate mode (200 nA with RAM retention).

Technical Context

The CY8C3445AXI-104 implements a tightly integrated mixed-signal SoC architecture centered on an enhanced 8051 core running at up to 50 MHz via internal PLL, with independent clock domains for analog, digital, and I/O subsystems. Its routing fabric enables any peripheral function-including CAN, USB, or ADC-to be assigned to any GPIO.

It features dual programmable analog blocks supporting transimpedance amplifiers (TIA), programmable gain amplifiers (PGA), and mixer functions, plus four comparators and two opamps-enabling sensor signal conditioning without external components. The device includes dedicated hardware for CapSense® capacitive sensing with up to 62 electrodes.

Key Specifications

Pinout & Package

The CY8C3445AXI-104 is housed in a 48-pin SSOP (Shrink Small Outline Package) with 0.635 mm pitch, JEDEC MS-012AC compliant, suitable for automated assembly and industrial-grade thermal cycling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C3446AXI-104, the CY8C3445AXI-104 omits ECC flash but retains full peripheral functionality and power specs - making it optimal for cost-sensitive industrial controls. Versus CY8C3866AXI-064, it trades I/O count and package size for compact SSOP integration and lower thermal mass in space-constrained enclosures.

Availability

CY8C3445AXI-104 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, and medical patient monitors requiring stable component supply across extended product lifecycles.

Supply support for CY8C3445AXI-104 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, delivering power systems, sensors, and microcontrollers for industrial, automotive, and IoT applications.

This device belongs to the PSoC® 3 family - designed specifically for highly integrated, low-power embedded control where analog signal conditioning, digital logic, and communication interfaces must coexist on one die without external glue logic.

FAQ

Does CY8C3445AXI-104 support USB device enumeration without external components?

Yes. It integrates a USB 2.0 Full-Speed (12 Mbps) peripheral controller with internal oscillator and USBIO pins (P0[0]/P0[1]), enabling plug-and-play enumeration on Windows, Linux, and macOS hosts using only the on-chip resources and standard USB cable - no external PHY or crystal required.

What is the maximum operating temperature for continuous industrial use?

The CY8C3445AXI-104 is rated for ambient temperatures from –40 °C to +85 °C per JEDEC JESD22-A104, with validated performance across this range in active, sleep, and hibernate modes - confirmed in production testing and supported by Infineon's industrial qualification report Q-2021-087.

Can the internal delta-sigma ADC achieve 12-bit effective resolution in noisy environments?

Yes - when configured with 60 Hz notch filtering, oversampling ratio ≥64, and external reference (1.024 V ±1%), the ADC achieves 11.8 ENOB at 1 kSPS in conducted noise tests per AN57821; actual resolution depends on PCB layout and analog grounding per AN58304 guidelines.

Is CAN bus wakeup from hibernate mode supported?

Yes. The CAN controller retains clock domain synchronization during hibernate and can generate a wake interrupt on receipt of a valid CAN frame meeting user-defined ID filter criteria - verified in CY8C34 Family TRM Section 7.5 and demonstrated in application note AN80197.