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Product Detailed Parameters
- Description：IC MCU 8BIT 8KB FLASH 32QFN
- Series：PSOC™1 CY8C21xxx
- Mfr：Infineon Technologies
- Package：Tray
- Core Processor：M8C
- Core Size：8-Bit
- Speed：24MHz
- Connectivity：I2C, SPI, UART/USART
- Peripherals：POR, PWM, WDT
- Number of I/O：28
- Program Memory Size：8KB (8K x 8)
- Program Memory Type：FLASH
- EEPROM Size：-
- RAM Size：512 x 8
- Voltage - Supply (Vcc/Vdd)：2.4V ~ 5.25V
- Data Converters：A/D 28x8b
- Oscillator Type：Internal
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：32-QFN (5x5)
- Package / Case：32-XFQFN Exposed Pad
- Grade：-
- Qualification：-
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Overview
The CY8C21434B-24LQXI is an 8-bit microcontroller from the Infineon PSoC 1 family, utilizing the M8C core. It features 8KB of Flash memory and operates within a voltage range of 2.4V to 5.25V. The device supports a maximum clock frequency of 24 MHz and includes 24 CapSense I/O pins. It integrates a Delta-Sigma ADC with 10-bit resolution at 5.9 ksps sampling rate. The component is housed in a 24-pin package and functions across a temperature range of -40°C to 85°C.
Feature Summary
- Integrates CapSense technology for capacitive touch sensing applications
- Includes a Delta-Sigma analog-to-digital converter module
- Supports programmable digital and analog blocks via PSoC Designer software
Applications
- Capacitive touch interface controllers
- Low-power embedded control systems
- Battery-operated devices requiring analog signal acquisition
Procurement Notes
Verify end-of-life status before procurement as the component is marked as discontinued. Confirm availability through authorized distributors or surplus channels. Ensure compatibility with existing design infrastructure given the legacy nature of the PSoC 1 architecture. Check for moisture sensitivity levels and storage requirements if sourcing from non-original packaging.
Selection Notes
Select this component for designs requiring integrated CapSense capabilities alongside basic analog conversion in an 8-bit environment. Consider the M8C core performance limits and available development tools like PSoC Designer. Evaluate pin count and package constraints against board layout requirements. Assess long-term supply chain stability due to product termination status.
Part Context
This part belongs to the Infineon PSoC 1 series, known for its programmable mixed-signal architecture. The CY8C21434B variant specifically targets applications needing simple touch sensing and moderate processing power. It represents an earlier generation of PSoC devices compared to the Cortex-M based PSoC 3/4/5LP families.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status, direct pin-to-pin replacements may require architectural migration to newer PSoC generations such as PSoC 4 or PSoC 5LP, necessitating firmware and hardware redesign.
