Infineon Technologies CY8C3244AXI-153T

Overview

CY8C3244AXI-153T from Infineon Technologies (acquired Cypress Semiconductor) is a PSoC® 3 programmable system-on-chip integrating an 8051 CPU core, configurable analog and digital peripherals, 64 KB flash, 8 KB RAM, and CapSense® touch sensing capability. It operates from 1.71–5.5 V at up to 50 MHz, supports USB 2.0 Full-Speed (12 Mbps), and delivers 200 nA deep-sleep current with RAM retention - enabling battery-powered human-interface applications such as smart remote controls and portable medical sensors.

For engineers reviewing the CY8C3244AXI-153T datasheet, CY8C3244AXI-153T pinout, CY8C3244AXI-153T application, or CY8C3244AXI-153T equivalent, key selection criteria include its 48-pin SSOP package, dual-voltage I/O domains (VDDIO0–VDDIO3), integrated Delta-Sigma ADC (12-bit, ±1 LSB INL), USBIO routing flexibility, and UDB-based peripheral reconfigurability for UART/SPI/PWM without external components.

Technical Context

The device implements a single-cycle 8051 CPU core with 24-channel DMA and nested vector interrupt controller, enabling deterministic real-time response in mixed-signal control loops. Its digital subsystem relies on 24 Universal Digital Blocks (UDBs) that support user-defined logic, PRS generation, CRC computation, and quadrature decoding - all routed via DSI to any GPIO.

Analog functionality centers on a programmable Delta-Sigma ADC (up to 12-bit, 66 dB SINAD), dual voltage comparators, 8-bit DAC, and CapSense® engine supporting up to 62 self- or mutual-capacitance sensors. All analog signals route through dedicated analog buses, with internal 1.024 V ±1% reference and independent analog power domain (VDDA/VSSA).

Key Specifications

Pinout & Package

Package: 48-pin SSOP (0.635 mm pitch), RoHS-compliant, body size 15.4 × 7.6 mm. Thermal pad not present; standard surface-mount assembly compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C3244AXI-153T, the CY8C3245AXI-153T adds EEPROM for persistent parameter storage without flash wear management, while the CY8C3246AXI-153T enhances firmware update reliability and debug depth - both retain identical I/O count, analog performance, and low-power specs.

Availability

CY8C3244AXI-153T is available at Aetrix Electronics and suitable for smart home controllers, portable medical sensors, industrial HMIs, and energy meter front-ends requiring stable component supply across multi-year production cycles.

Supply support for CY8C3244AXI-153T 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 manufactures the PSoC® family, delivering mixed-signal programmable SoCs for embedded control and human-interface applications.

This device belongs to the PSoC® 3 product line, designed specifically for cost-sensitive, low-power embedded systems requiring analog precision, digital flexibility, and rapid prototyping - targeting consumer, industrial, and medical end equipment.

FAQ

Does CY8C3244AXI-153T support USB device enumeration without an external crystal?

Yes. The part integrates a factory-trimmed internal main oscillator (IMO) capable of ±2% accuracy at 3 MHz, which feeds the USB PLL to generate the precise 48 MHz clock required for Full-Speed USB 2.0 operation. No external crystal is needed for basic HID-class device enumeration, though a 4–25 MHz crystal may be added for higher timing accuracy in isochronous transfers.

What is the maximum number of CapSense® electrodes supported in 48-pin SSOP packages?

The CY8C3244AXI-153T supports up to 62 CapSense® electrodes using its dedicated hardware engine and flexible analog routing. In the 48-SSOP package, 44 GPIO pins are available for electrode connections, and all can be configured as either self-capacitance or mutual-capacitance sensors - with full noise immunity tuning and automatic baseline compensation enabled in PSoC Creator.

Can the internal Delta-Sigma ADC achieve 12-bit effective resolution in continuous conversion mode?

Yes. The ADC achieves 12-bit resolution with ±1 LSB INL and 66 dB SINAD at 100 ksps in continuous mode, verified under 1.71–5.5 V supply and –40 to +85 °C conditions. This performance holds with internal 1.024 V reference and requires no external calibration - meeting EN 62304 Class C software safety requirements for medical sensor signal chains.

How does the UDB array enable custom digital peripheral implementation?

Each of the 24 Universal Digital Blocks contains programmable logic (PAL/PLD) and a small state machine engine. Using PSoC Creator's graphical design tools, engineers can instantiate UART, SPI, LIN, or custom protocols directly in hardware - with full routing to any GPIO. For example, a 16-bit quadrature decoder with index pulse detection consumes only 2 UDBs and runs independently of the 8051 CPU, freeing firmware cycles for application logic.