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Infineon Technologies CY8C21323-24LFXI
- Part No.:
- CY8C21323-24LFXI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
CY8C21323-24LFXI.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,062
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Product details
Overview
CY8C21323-24LFXI from Cypress Semiconductor is a programmable 8-bit Harvard-architecture PSoC® SoC featuring an M8C core running at up to 24 MHz, 4 KB flash, 256 bytes SRAM, and integrated analog/digital configurable blocks for mixed-signal embedded control. It operates from 2.4 V to 5.25 V (or down to 1.0 V with on-chip switch-mode pump), supports industrial temperature range (–40 °C to +85 °C), and targets low-power sensor interface and motor control applications.
For engineers reviewing the CY8C21323-24LFXI datasheet, CY8C21323-24LFXI pinout, CY8C21323-24LFXI application, or CY8C21323-24LFXI equivalent, key selection criteria include its 24-pin SOIC package, dual 10-bit ADC capability, four digital PSoC blocks supporting PWM/timers/UART/SPI/I²C, and flexible GPIO drive modes (25 mA sink, 10 mA source) with analog input support on up to eight pins.
Technical Context
The CY8C21323-24LFXI implements a fully configurable mixed-signal architecture centered on the M8C CPU core and two independent subsystems: a digital system with four 8-bit PSoC blocks supporting user-defined peripherals (e.g., 8–32-bit timers, 8/16-bit PWMs, UART, SPI, I²C master/slave/multi-master), and an analog system with four Type "E" PSoC blocks enabling dual 10-bit ADCs and two comparators with DAC or 1.3 V reference.
System-level resources include internal ±5% 24/48 MHz IMO and low-power ILO clocks, on-chip switch-mode pump (SMP) for 1.0 V operation, precision 1.3 V voltage reference, configurable LVD, POR, and global digital/analog interconnect routing-allowing any signal to be routed to any GPIO pin without fixed peripheral pin constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| M8C Core Speed | Up to 24 MHz - enables real-time control loops with sub-μs interrupt latency in embedded motor/sensor systems. |
| Flash / SRAM | 4 KB flash (50k erase/write cycles), 256 bytes SRAM - supports firmware updates and small runtime data buffers for standalone operation. |
| Analog Peripherals | Dual 10-bit ADC (8-to-1 mux), two comparators with 1.3 V or 8-bit DAC reference - enables simultaneous voltage/current sensing and threshold detection. |
| Digital Peripherals | Four digital PSoC blocks: configurable 8–32-bit timers/counters, 8/16-bit PWMs, full-duplex UART, SPI master/slave, I²C up to 400 kHz - eliminates need for external logic or communication ICs. |
| GPIO Capability | 16 GPIO pins (24-pin SOIC), each with 25 mA sink / 10 mA source, pull-up/pull-down/high-Z/open-drain, and analog input support - simplifies board-level interfacing and reduces external biasing components. |
| Operating Voltage | 2.4 V to 5.25 V standard; 1.0 V minimum with SMP - enables single-cell battery operation (e.g., LiFePO₄ or NiMH) without external regulators. |
| Temperature Range | –40 °C to +85 °C industrial grade - qualified for use in automotive cabin modules, industrial PLC I/O, and outdoor sensor nodes. |
Pinout & Package
Package: 24-pin SOIC (Small Outline Integrated Circuit), 300 mil width, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Main supply rail (2.4–5.25 V); connects to decoupling capacitor near pin for noise suppression. |
| VSS | Ground reference | Digital/analog common ground; requires low-impedance connection to PCB ground plane. |
| P0[0]–P0[7] | General-purpose I/O | Configurable as digital input/output, analog input, or peripheral function (e.g., UART RX/TX, SPI SCLK/MOSI/MISO). |
| P1[0]–P1[7] | General-purpose I/O | Same configurability as P0; supports interrupt-on-change and analog input (up to eight total across both ports). |
| XRES | External reset input | Active-low asynchronous reset; internal pull-up ensures reliable startup if left unconnected. |
| XTAL1/XTAL2 | Crystal oscillator terminals | Supports optional external crystal (e.g., 32.768 kHz) for precise timing; unused when relying on internal IMO/ILO. |
| SWD | Serial wire debug | Two-pin debug interface (SWDIO/SWCLK) for programming and real-time debugging via ISSP. |
Key Features
| Feature | Design Value |
|---|---|
| In-system serial programming (ISSP) | Enables field firmware updates without removing the device; uses SWD pins and requires no external programmer hardware beyond USB bridge. |
| Configurable analog blocks | Four Type "E" analog blocks allow dynamic reconfiguration of ADC, comparator, and reference paths - supports multi-sensor calibration without hardware change. |
| Global digital interconnect | Any digital block output can route to any GPIO pin - eliminates fixed peripheral pin conflicts and accelerates prototype iteration. |
| Switch-mode pump (SMP) | Generates regulated 3.3 V or 5 V from 1.2 V input - enables direct integration with single-cell alkaline/NiMH batteries in portable devices. |
| User-module-based design | PSoC Designer™ auto-generates register configuration and API code for selected peripherals - reduces firmware development time by >40% vs. bare-metal register coding. |
Applications
| Motor Control Interface | Sensor Signal Conditioning |
|---|---|
Use Scenario: Brushless DC motor commutation using hall-effect sensors and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Central controller executing commutation logic, generating synchronized 16-bit PWMs, sampling hall sensor inputs via GPIO-interrupt, and monitoring current sense ADC. Use Value: Eliminates discrete logic and microcontroller + ADC + PWM IC combo; achieves <10 μs timing jitter between hall edge detection and PWM update. | Use Scenario: Multi-channel environmental sensor node measuring temperature, humidity, and ambient light with local calibration. IC Role / Device Role / Timing Role: Analog front-end aggregator converting sensor outputs to digital via dual 10-bit ADCs, applying offset/gain correction in firmware, and transmitting over I²C. Use Value: Single-chip solution replaces op-amp conditioning stages and external ADC; supports 12-bit effective resolution through oversampling and digital filtering. |
| Industrial I/O Module | Low-Power Battery Monitor |
Use Scenario: DIN-rail mounted PLC expansion module with isolated digital inputs and relay outputs. IC Role / Device Role / Timing Role: Isolation interface controller managing opto-coupler input sampling, watchdog-timed relay actuation, and RS-485 communication via UART+transceiver. Use Value: Integrates timing-critical watchdog, UART, and GPIO control in one die - reduces BOM count by 3 ICs and improves EMI immunity via minimized trace lengths. | Use Scenario: Coin-cell powered asset tracker logging voltage, temperature, and motion every 5 minutes. IC Role / Device Role / Timing Role: Ultra-low-power supervisor monitoring battery voltage via LVD, waking from deep sleep on motion interrupt (accelerometer), and performing ADC conversion before returning to 1.0 V sleep mode. Use Value: Achieves 10-year coin-cell life via 1.0 V operation (SMP disabled), 1 μA deep-sleep current, and hardware-accelerated wake-on-motion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F030F4P6 | ARM Cortex-M0 core, 48 MHz, 16 KB flash, no integrated analog blocks - requires external ADC/comparator for sensor interface. | Better suited for pure digital control with high-speed communication (USB, higher baud UART); lacks on-chip analog configurability. | Select when needing ARM ecosystem compatibility and higher clock speed, but accept added BOM cost and layout complexity for analog functions. |
| TI MSP430G2553 | 16-bit RISC core, 16 MHz, 16 KB flash, 512 B RAM, integrated 10-bit ADC and comparator - no programmable digital logic blocks or global interconnect. | Ideal for ultra-low-power analog-centric designs with fixed peripheral set; cannot synthesize custom timers or PWM waveforms. | Select when power budget is <1 μA active and analog channel count is low (<4); avoid when requiring flexible PWM dead-time or multi-protocol serial support. |
Compared with STM32F030F4P6 and MSP430G2553, CY8C21323-24LFXI uniquely delivers field-programmable analog/digital logic within a single 8-bit MCU die - enabling rapid adaptation to changing sensor topologies or control algorithms without PCB respin.
Availability
CY8C21323-24LFXI is available at Aetrix Electronics and suitable for industrial I/O modules, battery-powered sensor nodes, motor control interfaces, and low-cost programmable logic replacements requiring stable component supply and long-term lifecycle support.
Supply support for CY8C21323-24LFXI 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
Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable embedded solutions, memory, and connectivity products for industrial, automotive, and consumer markets.
CY8C21323 belongs to the PSoC® 1 family - designed specifically to replace multiple discrete analog/digital components with a single, field-configurable SoC for cost-sensitive, low-to-mid complexity embedded control applications.
FAQ
Is CY8C21323-24LFXI pin-compatible with other CY8C21x23 variants?
Yes - all CY8C21x23 devices in the 24-pin SOIC package (e.g., CY8C21223-24LFXI, CY8C21123-24LFXI) share identical pinouts and footprint. Differences lie in flash size (4 KB vs. 2 KB vs. 1 KB), SRAM (256 B vs. 128 B), and available PSoC block count, but pin mapping and electrical characteristics are fully compatible.
Does CY8C21323-24LFXI support in-application programming (IAP)?
Yes - it supports partial flash updates via ISSP without full chip erase. Firmware can overwrite designated sections while preserving calibration constants or user data stored in protected flash regions, enabling secure over-the-air (OTA) updates in deployed systems.
Can the internal 24 MHz oscillator meet timing-critical UART baud rates?
Yes - the internal main oscillator (IMO) has ±5% accuracy over –40 °C to +85 °C, sufficient for UART operation up to 115.2 kbps at 3.3 V. For higher precision (e.g., 1 Mbps), use the IMO with automatic baud rate calibration or add an external crystal on XTAL1/XTAL2.
What development tools are required to program CY8C21323-24LFXI?
PSoC Designer™ IDE (discontinued but still supported) is mandatory for configuring PSoC blocks and generating firmware. Programming requires a MiniProg1 or MiniProg3 programmer/debugger connected via SWD; no JTAG adapter is needed. Free drivers and example projects are available from Infineon's legacy PSoC 1 archive.
CY8C21323-24LFXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 24-VFQFN Exposed Pad
- Series:
- PSOC™1 CY8C21xxx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 16
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.4V ~ 5.25V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C21323-24LFXI FAQ
1.How can I place an order for CY8C21323-24LFXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C21323-24LFXI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY8C21323-24LFXI reliable?
The price and inventory of CY8C21323-24LFXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C21323-24LFXI is usually 5 days.
3.What payment methods are accepted for CY8C21323-24LFXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C21323-24LFXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C21323-24LFXI?
CY8C21323-24LFXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C21323-24LFXI order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY8C21323-24LFXI?
For technical support, including CY8C21323-24LFXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C21323-24LFXI requirements.
6.How does Aetrix verify that CY8C21323-24LFXI is sourced from the original manufacturer or authorized distributors?
All CY8C21323-24LFXI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY8C21323-24LFXI meets industry standards.
7.What is the process for return or replacement of CY8C21323-24LFXI?
All CY8C21323-24LFXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C21323-24LFXI, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY8C21323-24LFXI part is unused and in its original packaging.
Return procedure for CY8C21323-24LFXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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