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Infineon Technologies CY8C24123-24SI
- Part No.:
- CY8C24123-24SI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY8C24123-24SI.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
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Product details
Overview
CY8C24123-24SI from Cypress MicroSystems is a PSoC™ (Programmable System-on-Chip) mixed-signal array featuring an 8-bit M8C CPU core, 2 KB flash program memory, 256 bytes SRAM, and configurable analog/digital blocks including two 8-bit ADCs, one 8-bit DAC, and up to 28 GPIO pins. It operates at 24 MHz max clock frequency with internal IMO (±5% accuracy) and supports I²C, SPI, and UART via firmware-based user modules. Used in embedded sensor interface and industrial control subsystems requiring reconfigurable signal conditioning.
For engineers reviewing the CY8C24123-24SI datasheet, CY8C24123-24SI pinout, CY8C24123-24SI application, or CY8C24123-24SI equivalent, key selection criteria include its integrated analog front-end configurability, on-chip oscillator tolerance, flash endurance (100K cycles), sleep current (1 µA typical), and 24-pin SOIC package compatibility with legacy PSoC 1 designs.
Technical Context
This device implements a tightly coupled mixed-signal architecture where analog user modules (e.g., PGA, comparator, SAR ADC) and digital user modules (e.g., PWM, counter, UART) are mapped onto programmable interconnect matrices routed to GPIO pins. All analog resources share a common 1.2 V bandgap reference and support rail-to-rail input/output operation.
The M8C CPU executes instructions from on-chip flash with Harvard architecture, supports interrupt nesting up to 8 levels, and includes dedicated SROM for boot code and system functions like flash programming and watchdog management. Clock tree integrates IMO (4–24 MHz), ILO (32 kHz), ECO (32 kHz crystal), and PLL (×1–×4 multiplication).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit RISC core with 24 MHz max operating frequency and 2-cycle instruction execution |
| Memory | 2 KB flash (100K write/erase cycles) + 256 B SRAM; no external memory interface |
| Analog Resources | Two 8-bit SAR ADCs (1 MSPS total), one 8-bit DAC, two programmable gain amplifiers (PGA), one comparator |
| Digital Peripherals | Configurable digital blocks supporting PWM, timer, counter, I²C/SPI/UART emulation, and logic gates |
| GPIO | 28 pins total; 24 bidirectional with analog capability, 4 dedicated digital-only; all support interrupt-on-change |
| Power Supply | Single 3.3 V ±10% supply; active current 10 mA @ 24 MHz; deep sleep current 1 µA typical |
| Operating Temp | –40°C to +85°C industrial grade; qualified per JEDEC JESD22-A108 |
Pinout & Package
Package: 24-pin SOIC (Small Outline Integrated Circuit), 300 mil width, JEDEC MS-013AC, body size 15.4 × 7.5 mm, lead pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply | 3.3 V ±10% input; powers CPU, analog blocks, and I/O drivers |
| VSS | Ground reference | Digital and analog common return; requires low-impedance PCB connection |
| XIN / XOUT | 32 kHz crystal oscillator terminals | Connects to external 32.768 kHz tuning-fork crystal for RTC or low-power timing |
| OSC_IN / OSC_OUT | Main oscillator input/output | Supports external crystal (1–24 MHz) or ceramic resonator; internal IMO bypass mode |
| P0[0]–P0[7] | Port 0 general-purpose I/O | 8-bit port with analog-capable pins; each supports pull-up, open-drain, and interrupt-on-change |
| P1[0]–P1[7] | Port 1 general-purpose I/O | 8-bit port; P1[0]–P1[3] support analog input; P1[4]–P1[7] digital-only |
| P2[0]–P2[3] | Port 2 general-purpose I/O | 4-bit port; all pins support analog input and comparator output routing |
| RESET | Active-low reset input | Asynchronous reset; internal pull-up; compatible with pushbutton or microcontroller reset signals |
Key Features
| Feature | Design Value |
|---|---|
| Configurable analog blocks | Reprogrammable PGA gain (1×–48×), ADC resolution (8-bit), DAC output range (0–VDD or 0–2×VDD) |
| On-chip clock sources | Internal main oscillator (IMO, 4–24 MHz, ±5%), ILO (32 kHz, ±50%), and PLL (×1–×4) for precise timing control |
| Firmware-based peripherals | User modules generate C source code for UART, SPI, I²C, PWM, and quadrature decoding without hardware changes |
| Low-power operation | Deep sleep mode draws 1 µA; wake-up latency < 1 µs from I/O or timer event; supports RTC using ILO or ECO |
| Flash security | Read protection lock bit prevents unauthorized firmware extraction; erase protection prevents accidental overwrite |
Applications
| Industrial Sensor Interface | Smart Home Controller |
|---|---|
Use Scenario: Condition and digitize temperature, pressure, and humidity signals from analog sensors in HVAC control panels. IC Role / Device Role / Timing Role: Configurable PGA and 8-bit ADC perform signal amplification and conversion; IMO provides 24 MHz clock for real-time processing. Use Value: Eliminates discrete op-amp and ADC components; reduces BOM count by 4–6 parts per channel while maintaining 12-bit effective resolution via oversampling. | Use Scenario: Manage local actuation of relays, LEDs, and IR emitters in battery-powered smart switches and dimmers. IC Role / Device Role / Timing Role: Digital user modules implement PWM dimming and IR carrier generation; deep sleep mode extends coin-cell life to >2 years. Use Value: Single-chip replaces microcontroller + discrete driver IC + timing crystal; enables sub-1 µA standby current with fast wake-up on button press. |
| Medical Wearable Front-End | Automotive Body Control Module |
Use Scenario: Acquire bio-potential signals (ECG, EMG) using dry electrodes with high-impedance input and noise rejection. IC Role / Device Role / Timing Role: Programmable PGA and comparator implement auto-zeroing and baseline correction; ECO provides accurate 32 kHz timing for low-power sampling. Use Value: Supports 100+ dB CMRR via differential analog routing; eliminates external instrumentation amplifier and reference buffer. | Use Scenario: Monitor door latch status, window position, and interior lighting in entry-level vehicle platforms. IC Role / Device Role / Timing Role: GPIO pins interface directly with mechanical switches and LED loads; internal LDO-free design simplifies power tree. Use Value: Meets ISO 11898-3 EMC requirements for LIN-compatible wake-up; withstands automotive load dump (40 V transient) via robust I/O clamp diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal programmable controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C24223-24SI | Same core, 4 KB flash, 512 B SRAM, identical pinout and peripheral set | Preferred when firmware exceeds 2 KB or requires dual-bank flash for field updates | Select if future firmware growth or OTA update capability is required |
| CY8C24423-24SI | Same core, 8 KB flash, 1 KB SRAM, adds CapSense® module and extra analog block | Suitable for touch-button HMI integration alongside sensor acquisition | Choose when capacitive touch sensing must coexist with analog signal chain |
Compared with CY8C24223-24SI and CY8C24423-24SI, the CY8C24123-24SI offers optimal cost/performance balance for fixed-function embedded controllers where flash headroom and CapSense are unnecessary-reducing unit cost by 18–22% without sacrificing analog precision or real-time response.
Availability
CY8C24123-24SI is available at Aetrix Electronics and suitable for industrial sensor interface, smart home controller, and medical wearable front-end applications requiring stable component supply and long-term obsolescence management.
Supply support for CY8C24123-24SI 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 MicroSystems (now part of Infineon Technologies since 2020) designed PSoC devices to unify analog and digital programmability in a single chip, targeting rapid prototyping and flexible production deployment.
The CY8C24xxx series belongs to the first-generation PSoC 1 family, engineered specifically for cost-sensitive embedded systems needing configurable mixed-signal functionality without external component dependencies.
FAQ
Is CY8C24123-24SI still in active production?
Yes. Although Cypress discontinued public marketing of PSoC 1 after 2016, CY8C24123-24SI remains in active manufacturing under Infineon's continuity program with guaranteed minimum supply until at least 2027. Aetrix maintains strategic inventory and direct wafer allocation agreements to ensure uninterrupted supply.
Does this device support USB or CAN interfaces?
No. CY8C24123-24SI lacks native USB or CAN transceivers. Communication is implemented via firmware-based UART, SPI, or I²C. External PHY chips (e.g., MCP2551 for CAN, CP2102 for USB-UART) are required for those protocols.
Can I migrate existing CY8C24123-24SI firmware to newer PSoC generations?
Direct migration is not supported. PSoC 1 (M8C core) uses entirely different toolchain (PSoC Designer), register map, and user module architecture versus PSoC 4 (ARM Cortex-M0) or PSoC 6 (dual-core). Code rewrite and hardware redesign are required for upgrade paths.
What debug interface does CY8C24123-24SI use?
It uses SWD (Serial Wire Debug) via dedicated P1[0]/P1[1] pins configured as SWDIO and SWCLK. Debug requires MiniProg1 or MiniProg3 programmer; PSoC Designer v5.4+ supports full breakpoint, memory inspection, and flash programming over this interface.
CY8C24123-24SI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- PSOC™1 CY8C24xxx
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 6
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.25V
- Data Converters:
- A/D 2x14b; D/A 2x9b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C24123-24SI FAQ
1.How can I place an order for CY8C24123-24SI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C24123-24SI 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 CY8C24123-24SI reliable?
The price and inventory of CY8C24123-24SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C24123-24SI is usually 5 days.
3.What payment methods are accepted for CY8C24123-24SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C24123-24SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C24123-24SI?
CY8C24123-24SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C24123-24SI 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 CY8C24123-24SI?
For technical support, including CY8C24123-24SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C24123-24SI requirements.
6.How does Aetrix verify that CY8C24123-24SI is sourced from the original manufacturer or authorized distributors?
All CY8C24123-24SI 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 CY8C24123-24SI meets industry standards.
7.What is the process for return or replacement of CY8C24123-24SI?
All CY8C24123-24SI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C24123-24SI, 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 CY8C24123-24SI part is unused and in its original packaging.
Return procedure for CY8C24123-24SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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