Infineon Technologies CY8C3446LTI-073

Overview

CY8C3446LTI-073 from Infineon Technologies (formerly Cypress) is a programmable 8-bit PSoC® 3 system-on-chip featuring an 8051 CPU core, 64 KB flash, 8 KB RAM, full CAN 2.0b interface, USB 2.0 Full-Speed peripheral, and configurable analog/digital peripherals. It operates from 1.71–5.5 V across –40 to +85 °C, supports up to 50 MHz clocking via internal PLL, and integrates CapSense® for touch sensing in embedded control applications.

For engineers reviewing the CY8C3446LTI-073 datasheet, CY8C3446LTI-073 pinout, CY8C3446LTI-073 application, or CY8C3446LTI-073 equivalent, this device is selected for mixed-signal embedded systems requiring integrated analog front-ends, real-time communication (CAN/USB/I²C), low-power operation, and field-programmable logic without external glue logic.

Technical Context

The CY8C3446LTI-073 implements a tightly coupled architecture where the 8051 CPU subsystem coordinates programmable digital resources-including 24 Universal Digital Blocks (UDBs)-and analog resources-including delta-sigma ADC, dual DACs, opamps, and comparators-via shared interconnect buses. Its routing flexibility enables any peripheral function to be assigned to any GPIO.

It features three independent clock domains: IMO (3–62 MHz, ±2% at 3 MHz), external crystal (4–25 MHz), and low-power ILO (1/33/100 kHz), with 12 programmable dividers feeding peripherals. Power management includes Active (1.2 mA @ 6 MHz), Sleep (1 µA), and Hibernate (200 nA with RAM retention) modes across up to six voltage domains.

Key Specifications

Pinout & Package

Package: 68-pin QFN (9 × 9 mm, 0.5 mm pitch), thermally enhanced with exposed pad for improved heat dissipation in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C3446LTI-073, CY8C3866AXI-063 offers expanded I/O and LCD support at the expense of size and cost, while STM32F072CBT6 trades analog programmability for ARM ecosystem advantages-making CY8C3446LTI-073 optimal for rapid mixed-signal prototyping with minimal external components.

Availability

CY8C3446LTI-073 is available at Aetrix Electronics and suitable for industrial motor control, medical patient monitoring, automotive body electronics, and smart home sensor hubs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for CY8C3446LTI-073 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 ICs, and embedded security solutions with broad industrial and automotive qualification.

The CY8C34 family belongs to Infineon's PSoC® 3 programmable SoC product line, designed specifically for ultra-low-power, mixed-signal embedded control applications where analog configurability, communication flexibility (CAN/USB/I²C), and rapid hardware-software co-design are critical.

FAQ

Does CY8C3446LTI-073 support USB device enumeration without external crystal?

Yes. The device includes an internal oscillator certified for USB 2.0 Full-Speed operation (TID#40770053), enabling plug-and-play USB device enumeration using only the internal 48-MHz clock-no external crystal required for basic HID or CDC class devices.

What is the maximum resolution and sampling rate of the delta-sigma ADC?

The delta-sigma ADC is configurable from 8 to 12 bits with programmable oversampling. At 12-bit resolution, it achieves up to 125 kSPS; at 8-bit, up to 1 MSPS. Effective number of bits (ENOB) exceeds 11.5 bits at 12-bit mode with internal 1.024 V reference.

Can CapSense® operate reliably in noisy industrial environments?

Yes. CapSense® uses shielded sensing, adjacent channel suppression, and adaptive thresholding algorithms. Tested per IEC 61000-4-3 (radiated RF immunity) and IEC 61000-4-6 (conducted RF immunity), it maintains stable operation up to 10 V/m radiated fields and 10 V conducted noise.

Is the CAN controller compliant with ISO 11898-1:2015?

Yes. The integrated CAN 2.0b controller supports bit rates up to 1 Mbps and conforms to ISO 11898-1:2015 physical layer timing requirements when paired with a compliant transceiver (e.g., Infineon TLE6250). All register-level behavior matches the Bosch CAN specification v2.0B.