Infineon Technologies CY8C23533-24LQXIT

Overview

CY8C23533-24LQXIT from Infineon Technologies (formerly Cypress) is a programmable 8-bit Harvard-architecture PSoC® SoC featuring an M8C core running at up to 24 MHz, 8 KB flash, 256 bytes SRAM, four digital PSoC blocks, and four analog PSoC blocks - used in motor control, sensor interface, and embedded system integration where mixed-signal reconfigurability and on-chip ADC/DAC are required.

For engineers reviewing the CY8C23533-24LQXIT datasheet, CY8C23533-24LQXIT pinout, CY8C23533-24LQXIT application, or CY8C23533-24LQXIT equivalent, key selection criteria include its 8-bit SAR ADC (300 kSPS), programmable gain amplifiers, 16-bit PWMs with dead-band, I²C/SPI/UART support, and industrial temperature range (–40 °C to +85 °C).

Technical Context

The device integrates a configurable analog system centered on an 8-bit SAR ADC optimized for motor control, with monotonicity guaranteed and up to 300 kSPS sampling. Four switched-capacitor and continuous-time analog blocks support filters, comparators, 6-/9-bit DACs, and high-current (30 mA) analog outputs.

Digital functionality is built around four 8-bit PSoC blocks that combine into 8–32-bit peripherals: timers, counters, PWMs (with dead-band), CRC generators, PRS modules, full-duplex UART, and SPI masters/slaves - all routable to any GPIO via global digital interconnect.

Key Specifications

Pinout & Package

Package: 32-pin QFN (5 mm × 5 mm, 0.5 mm pitch), exposed thermal pad - optimized for compact industrial PCB layouts with efficient heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C23533-24LQXIT, PSOC4000S offers modern ARM architecture but sacrifices analog configurability, while STM32F072 provides larger memory and USB but lacks integrated analog signal processing - making CY8C23533 optimal for compact, analog-intensive embedded control where hardware reuse across variants matters.

Availability

CY8C23533-24LQXIT is available at Aetrix Electronics and suitable for brushless motor control, industrial sensor nodes, smart lighting systems, and home appliance UI subsystems requiring stable component supply and long-term manufacturability.

Supply support for CY8C23533-24LQXIT 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 secure connectivity solutions.

CY8C23533 belongs to the legacy PSoC 1 family - designed for cost-sensitive, analog-intensive embedded applications where hardware reconfigurability and rapid prototyping reduce time-to-market without ARM licensing overhead.

FAQ

Does CY8C23533-24LQXIT support in-system programming without external hardware?

Yes - it supports In-System Serial Programming (ISSP) using only two GPIO pins (P1[0] and P1[1]) and a simple serial interface. No dedicated programmer is required; firmware updates can be performed in the field via UART or custom bootloader, enabling remote maintenance and version rollbacks without board removal.

What is the maximum sampling rate of the SAR ADC and under what conditions is monotonicity guaranteed?

The 8-bit SAR ADC achieves up to 300 kSPS with guaranteed monotonicity across its full range at VDD ≥ 4.5 V and ambient temperature ≤ 85 °C. Monotonicity is maintained independent of input signal slew rate or reference voltage stability, verified per datasheet test condition AC11 on page 30.

Can the internal 24 MHz oscillator meet timing requirements for UART communication at 115.2 kbps?

Yes - the internal main oscillator (IMO) has ±5% accuracy over –40 °C to +85 °C, yielding worst-case error of ±5.76 kbps at 115.2 kbps, well within UART's typical ±10% tolerance. For tighter baud rate accuracy, the optional 32.768 kHz crystal + PLL configuration delivers ±0.1% system clock stability.

How many analog input channels can be simultaneously sampled, and are they multiplexed internally?

Up to eight analog inputs are accessible via GPIO pins (P0[0]–P0[7], P2[0]–P2[1]), with two additional analog inputs restricted to specific pins (P0[6], P0[7]). All analog inputs feed into a single 8-bit SAR ADC with internal multiplexer - simultaneous sampling is not supported, but sequential conversion at 300 kSPS enables effective pseudo-simultaneous acquisition across 8 channels in <27 μs.