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Infineon Technologies CY8C21323-24LFXIT
- Part No.:
- CY8C21323-24LFXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
CY8C21323-24LFXIT.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,330
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Product details
Overview
CY8C21323-24LFXIT from Infineon Technologies (acquired Cypress Semiconductor) is a programmable 8-bit Harvard-architecture PSoC® SoC featuring an M8C core running up to 24 MHz, 4 KB flash, 256 bytes SRAM, and configurable analog/digital 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 integrates dual 10-bit ADCs, comparators with DAC references, UART/SPI/I²C, and PWM timers - deployed in smart sensor nodes and low-power industrial controllers.
For engineers reviewing the CY8C21323-24LFXIT datasheet, CY8C21323-24LFXIT pinout, CY8C21323-24LFXIT application, or CY8C21323-24LFXIT equivalent, key selection criteria include its 24-pin SOIC package, 24 MHz M8C CPU speed, ±5% internal oscillator tolerance (±2.5% at 0–70 °C), 25-mA GPIO sink capability, and support for in-system serial programming (ISSP) with partial flash updates.
Technical Context
The device implements a fixed-function M8C 8-bit Harvard-core processor with dedicated instruction and data buses, enabling deterministic execution and efficient peripheral access. Its digital system comprises four 8-bit PSoC blocks configurable as timers, counters, PWMs (8-/16-bit), CRC generators, or UART/SPI peripherals - all routable to any GPIO via global digital interconnect.
The analog system includes four Type "E" PSoC blocks supporting two comparators (each with selectable 1.3 V or 8-bit DAC reference) and single/dual 10-bit SAR ADCs. Clocking relies on an internal ±5% 24/48-MHz main oscillator (IMO) and low-power ILO for sleep/wake timing, with digital clock dividers enabling three independent frequencies routed to both analog and digital subsystems.
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 and deterministic timing for motor commutation or sensor sampling. |
| Flash Memory | 4 KB with 50,000 erase/write cycles - sufficient for firmware plus EEPROM emulation for parameter storage without external nonvolatile memory. |
| SRAM | 256 bytes - supports stack, variables, and small buffers for UART/I²C transaction handling in resource-constrained edge nodes. |
| Analog Inputs | Up to eight GPIO-configurable analog inputs - allows direct connection of thermistors, potentiometers, or current-sense resistors without external signal conditioning. |
| Digital Peripherals | Four digital PSoC blocks - configurable as dual 16-bit PWMs with dead-band, 32-bit counter/timer, or full-duplex UART - eliminates need for discrete logic or companion ICs. |
| Operating Voltage | 2.4 V to 5.25 V (or 1.0 V–5.25 V with SMP) - supports single-cell Li-ion, alkaline, or USB-powered designs with seamless voltage scaling. |
| I²C Speed | Up to 400 kHz - enables high-speed communication with multiple sensors or displays in compact industrial HMI systems. |
Pinout & Package
Package: 24-pin SOIC (Small Outline Integrated Circuit), 300 mil width, RoHS-compliant, JEDEC MS-013AC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | Accepts 2.4–5.25 V; powers core, digital, and analog systems; bypass capacitor required for noise suppression. |
| VSS | Ground reference | Common return path for all circuits; must be low-impedance connection to minimize ground bounce in mixed-signal operation. |
| P0[0]–P0[7] | General-purpose I/O bank 0 | Configurable as digital input/output, analog input, or interrupt source; supports 25-mA sink for driving LEDs or small relays. |
| P1[0]–P1[7] | General-purpose I/O bank 1 | Same capabilities as P0; enables independent routing of analog and digital signals across two banks for isolation-critical designs. |
| XRES | External reset input | Active-low asynchronous reset; debounced externally or internally; used for brown-out recovery or watchdog timeout response. |
| XTAL1/XTAL2 | Crystal oscillator connections | Optional external crystal interface (32.768 kHz or 1–24 MHz); not required - internal IMO suffices for most applications. |
| SWD | Serial wire debug interface | Two-pin debug port (SWDIO/SWCLK) for programming and real-time debugging via ISSP-compatible programmers. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Analog Blocks | Four Type "E" blocks enable dual 10-bit ADCs or comparator+DAC combinations - reduces BOM count by integrating reference and conversion in one die. |
| Programmable GPIO Drive Modes | Pull-up, pull-down, high-Z, strong, or open-drain on all pins - simplifies level-shifting, bus termination, and bidirectional signal control without external components. |
| In-System Serial Programming | ISSP supports field firmware updates and partial flash rewrites - enables remote calibration updates and feature activation without hardware rework. |
| Switch-Mode Pump (SMP) | Generates regulated 3.3 V or 5 V from 1.2 V battery input - allows direct use of single NiMH or LiFePO₄ cells in portable instrumentation. |
| User-Configurable LVD | Adjustable low-voltage detection threshold with interrupt output - provides graceful shutdown or data save before brown-out in battery-powered systems. |
Applications
| Industrial Sensor Node | Smart Thermostat Controller |
|---|---|
Use Scenario: Standalone temperature/humidity node with local display and wireless uplink. IC Role / Device Role / Timing Role: Central mixed-signal controller managing ADC sampling, PWM fan control, I²C display interface, and UART-to-RF bridge. Use Value: Integrates 10-bit ADC, dual comparators, and 16-bit PWM in one chip - eliminates discrete op-amps, timers, and level shifters while reducing PCB area by >35%. | Use Scenario: Battery-powered HVAC wall unit with touch sensing, relay control, and local feedback. IC Role / Device Role / Timing Role: System-on-chip managing capacitive touch inputs, thermistor ADC, relay drivers, and RS-485 communication. Use Value: 25-mA GPIO sink drives relays directly; configurable interrupt-on-change supports low-power wake-from-sleep on button press - extends battery life to >2 years. |
| Programmable Power Monitor | Embedded Motor Commutator |
Use Scenario: DIN-rail mounted AC/DC power supply with voltage/current monitoring and fault logging. IC Role / Device Role / Timing Role: Analog front-end and control engine performing real-time RMS calculation, overvoltage trip, and EEPROM-based event logging. Use Value: On-chip 1.3 V reference ensures stable ADC accuracy across temperature; flash EEPROM emulation stores 100+ fault records without external memory. | Use Scenario: Brushless DC motor driver with Hall-effect feedback and closed-loop speed regulation. IC Role / Device Role / Timing Role: Real-time commutation sequencer generating six-phase PWM with synchronized ADC sampling of back-EMF. Use Value: Dual 10-bit ADCs sample two phases simultaneously; 24 MHz M8C executes commutation logic in <2 μs - enables 30,000 RPM operation with minimal jitter. |
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 |
|---|---|---|---|
| PSOC4000S (CY8C4014LQI-422) | ARM Cortex-M0+ core, 48 MHz, 32 KB flash, 4 KB SRAM, integrated CapSense®; no SMP or 1.3 V ref. | Better for capacitive touch UIs and higher-throughput firmware; lacks on-chip voltage boosting for single-cell battery apps. | Select when migrating to ARM ecosystem or requiring >10 kSPS ADC throughput; avoid if SMP or ultra-low-VDD operation is mandatory. |
| MAX32660 | ARM Cortex-M4F, 96 MHz, 256 KB flash, 96 KB SRAM, integrated ADC/DAC; no programmable analog blocks or PSoC-style routing. | Superior for DSP-intensive tasks (e.g., FFT-based vibration analysis); requires external analog front-end for precision sensor conditioning. | Choose for algorithm-heavy applications needing floating-point math; not suitable for analog-peripheral customization like comparator+DAC chaining. |
Compared with CY8C21323-24LFXIT, PSOC4000S offers modern ARM tooling but sacrifices SMP and fine-grained analog configurability, while MAX32660 delivers raw compute power at the cost of analog flexibility and single-cell battery support - making CY8C21323 optimal for cost-sensitive, low-power, analog-rich embedded control.
Availability
CY8C21323-24LFXIT is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, programmable power monitors, and embedded motor commutators requiring stable component supply across extended product lifecycles.
Supply support for CY8C21323-24LFXIT 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 owns the PSoC® portfolio, delivering programmable mixed-signal ICs for industrial, automotive, and IoT applications with emphasis on integration, reliability, and long-term supply.
The CY8C21x23 family targets cost-sensitive, low-power embedded control applications where analog signal conditioning, digital timing, and firmware flexibility must coexist on a single die - optimized for space-constrained, battery-operated, or retrofit industrial modules.
FAQ
What development tools are required to program CY8C21323-24LFXIT?
PSoC Designer™ IDE (legacy, Windows-only) is the official tool for configuring analog/digital blocks, generating firmware, and programming via ISSP. Required hardware includes a MiniProg1 or compatible programmer with SWD interface. No JTAG adapter is needed - the two-pin SWD port supports full debug, flash erase, and real-time variable inspection during operation.
Does CY8C21323-24LFXIT support true 10-bit ADC operation with simultaneous sampling?
Yes - the device supports dual 10-bit SAR ADCs that can operate independently or in synchronized mode. When configured as a dual ADC, both channels sample simultaneously on the same clock edge, enabling precise phase-difference measurements for motor control or differential sensor pairs without external sample-hold circuitry.
Can the internal switch-mode pump (SMP) drive external loads?
No - the SMP is strictly for internal voltage generation to support core/analog operation below 2.4 V. Its output is not accessible at any pin and cannot source current to external circuitry. It enables operation from 1.0 V to 5.25 V supply but does not replace a standalone boost converter for powering peripherals.
Is there hardware support for I²C multi-master arbitration in CY8C21323-24LFXIT?
Yes - the integrated I²C module fully supports multi-master mode per SMBus v2.0 specification, including clock synchronization, arbitration detection, and collision resolution. It handles bus contention automatically without firmware intervention, allowing multiple CY8C21323 devices or other masters to share the same I²C bus safely.
CY8C21323-24LFXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 24-VFQFN Exposed Pad
- Series:
- PSOC™1 CY8C21xxx
- Packaging:
- Tape & Reel (TR)
- 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:
CY8C21323-24LFXIT FAQ
1.How can I place an order for CY8C21323-24LFXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C21323-24LFXIT 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 CY8C21323-24LFXIT reliable?
The price and inventory of CY8C21323-24LFXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C21323-24LFXIT is usually 5 days.
3.What payment methods are accepted for CY8C21323-24LFXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C21323-24LFXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C21323-24LFXIT?
CY8C21323-24LFXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C21323-24LFXIT 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 CY8C21323-24LFXIT?
For technical support, including CY8C21323-24LFXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C21323-24LFXIT requirements.
6.How does Aetrix verify that CY8C21323-24LFXIT is sourced from the original manufacturer or authorized distributors?
All CY8C21323-24LFXIT 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 CY8C21323-24LFXIT meets industry standards.
7.What is the process for return or replacement of CY8C21323-24LFXIT?
All CY8C21323-24LFXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C21323-24LFXIT, 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 CY8C21323-24LFXIT part is unused and in its original packaging.
Return procedure for CY8C21323-24LFXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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