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Infineon Technologies CY8C21434-24LTXI — Microcontrollers & Processors (MCU / MPU / DSP)

CY8C21434-24LTXI Infineon PSOC®1 8-bit MCU, 24 MHz

MPNCY8C21434-24LTXI
End of Life

Infineon PSOC®1 CY8C21xxx series 8-bit M8C MCU, 24 MHz, 8 KB Flash, 512 x 8 RAM, 28 I/O, I²C/SPI/UART/USART, 28x8b ADC, 2.4 V to 5.25 V, -40°C to 85°C, 32-VFQFN Exposed Pad.

$6.63Ref. price · indicative, final on quote
Packaging32-VFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesPSOC®1 CY8C21xxx
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CY8C21434-24LTXI specifications
ParameterValue
SeriesPSOC®1 CY8C21xxx
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.4V ~ 5.25V
Operating temperature-40°C ~ 85°C (TA)
Speed24MHz
PackageTray
RAM size512 x 8
Core size8-Bit
PeripheralsPOR, PWM, WDT
ConnectivityI²C, SPI, UART/USART
Number of i (O)28
Core processorM8C
Case32-VFQFN Exposed Pad
Data convertersA/D 28x8b
Program memory size8KB (8K x 8)

Product details

What this 8-bit PSOC®1 MCU brings to the BOM

The Infineon CY8C21434-24LTXI is an 8-bit M8C-core microcontroller from the PSOC®1 CY8C21xxx family, clocked at 24 MHz. On-chip peripherals include POR, PWM, and WDT for basic housekeeping, plus I²C, SPI, and UART/USART serial interfaces for connecting to sensors, displays, or a host controller.

Supply voltage and power rail fit

Memory budget — what 8 KB Flash and 512 x 8 RAM can hold

8 KB of Flash and 512 x 8 bytes of RAM handle a dedicated control task with a serial stack and application code.

It is ROHS3 compliant. No last-time-buy or end-of-life notices are on file. For dual-sourcing resilience, the CY8C29466-24PVXI is a functional peer within the PSOC®1 M8C family — same core, same 24 MHz speed, same serial interfaces and POR/PWM/WDT peripherals — though it offers more memory and a different package.

Frequently asked questions

What is the difference between CY8C21434-24LTXI and CY8C21434-24PVXI?

The CY8C21434-24PVXI is the same M8C core, 24 MHz, 8 KB Flash, and peripheral set, but packaged in a 28-pin SSOP (5.3 mm body) versus the 32-QFN (5x5 mm) of the -24LTXI. The QFN variant offers 28 I/O versus 24 on the SSOP, and the QFN's exposed pad improves thermal dissipation. They are not pin-compatible — the PCB footprint and pinout differ.

Can CY8C21434-24LTXI be a replacement for CY8C21434-24PVXI?

No — they are not pin-compatible. The -24LTXI is a 32-QFN package with 28 I/O, while the -24PVXI is a 28-pin SSOP with 24 I/O. A PCB redesign is required to swap between them. Functionally they share the same core, memory, and peripherals, so firmware can be ported with minimal changes.