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Infineon Technologies CY8C3246AXI-138T
- Part No.:
- CY8C3246AXI-138T
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
CY8C3246AXI-138T.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 100TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,765
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Product details
Overview
CY8C3246AXI-138T from Infineon Technologies (acquired Cypress Semiconductor) is a programmable 8-bit PSoC® 3 system-on-chip integrating an enhanced 8051 CPU core, configurable analog and digital peripherals, 64 KB flash, 8 KB RAM, and 2 KB EEPROM. It operates from 1.71–5.5 V at up to 50 MHz, supports CapSense® touch sensing on up to 62 GPIOs, and includes USB 2.0 FS (12 Mbps), I²C, SPI, UART, and Delta-Sigma ADC (12-bit, <±1 LSB INL). It targets embedded control in industrial HMI, medical sensor interfaces, and battery-powered IoT endpoints.
For engineers reviewing the CY8C3246AXI-138T datasheet, CY8C3246AXI-138T pinout, CY8C3246AXI-138T application, or CY8C3246AXI-138T equivalent, key selection criteria include its mixed-signal configurability, USBIO routing capability, integrated boost regulator (0.5 V input), 200 nA hibernate mode with RAM retention, and UDB-based peripheral synthesis - all validated for production use in resource-constrained, low-power designs.
Technical Context
The device implements a single-cycle 8051 CPU with nested vector interrupt controller and 24-channel DMA, enabling zero-CPU-overhead data movement between peripherals and memory. Its digital subsystem relies on 24 Universal Digital Blocks (UDBs), each containing PAL/PLD logic and a state machine, supporting synthesizable functions including 8–32-bit timers, CRC, PRS, quadrature decoders, and LIN 2.0.
Analog resources include a 12-bit Delta-Sigma ADC (66 dB SINAD, <100 µV offset), dual voltage comparators, 8-bit DAC (1 Msps VDAC / 8 Msps IDAC), and 1.024 V ±1% internal reference. All analog and digital signals are fully routable to any GPIO via programmable interconnect, with dedicated SIO pins supporting 25 mA sink, overvoltage tolerance, and hot-swap operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Single-cycle 8051 running up to 50 MHz; enables deterministic real-time control with sub-µs interrupt latency. |
| Flash / RAM / EEPROM | 64 KB flash (with ECC support), 8 KB SRAM, 2 KB EEPROM; sufficient for complex firmware + persistent calibration data storage. |
| ADC Resolution & Accuracy | 12-bit Delta-Sigma ADC with ±1 LSB INL/DNL, 66 dB SINAD; suitable for precision sensor signal acquisition without external signal conditioning. |
| USB Interface | Full-speed USB 2.0 (12 Mbps) with integrated PHY and bootloader support; eliminates need for external USB transceiver in hostless applications. |
| Power Modes | 200 nA hibernate (RAM retention), 1 µA sleep (RTC active), 1.2 mA @ 6 MHz active; enables multi-year battery life in intermittent-sensing nodes. |
| I/O Flexibility | 48-pin SSOP package with 36 GPIOs + 4 SIOs + USBIO; all digital/analog peripherals fully routable to any pin via DSI. |
| Boost Regulator | Integrated synchronous boost converter accepting 0.5–5.5 V input; allows direct single-cell Li-ion or coin-cell operation without external PMIC. |
Pinout & Package
Package: 48-pin SSOP (Small Outline Integrated Circuit), body size 15.4 mm × 7.6 mm, 0.635 mm pitch, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO0–VDDIO3 | I/O supply domains | Four independent voltage domains (1.2–5.5 V) enable mixed-voltage interfacing without level shifters. |
| P0[0]–P2[7], P12[0–3], P15[0–7] | Configurable GPIO/SIO/USBIO | 36 general-purpose pins; 4 SIOs support 25 mA sink, programmable thresholds, comparator mode; 2 USBIO pins support D+/D− and SWD debug. |
| VDDA / VSSA | Analog power/ground | Separate analog supply (1.71–5.5 V) and ground reduce noise coupling into ADC/DAC paths. |
| XTAL_IN / XTAL_OUT | External crystal interface | Supports 4–25 MHz crystals for precise timing; optional 32.768 kHz RTC crystal input on P15[1]/P15[2]. |
| VBOOST | Boost regulator output | Provides regulated output (up to 5 V) from 0.5 V input; can power external circuitry like LCD bias or sensors. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Subsystem | Configurable Delta-Sigma ADC, dual comparators, 8-bit DAC, and 1.024 V ±1% reference enable sensor front-end design without discrete signal chain components. |
| UDB-Based Peripheral Synthesis | 24 Universal Digital Blocks allow hardware-level implementation of custom protocols (e.g., proprietary UART variants, CRC engines, PWM sequencers) without CPU overhead. |
| CapSense® Integration | Native support for up to 62 self- or mutual-capacitance touch sensors using only GPIOs; no external IC required for HMI button/slider/wheel interfaces. |
| Flexible Clock Architecture | Internal IMO (3–24 MHz, ±2%), PLL (up to 50 MHz), ILO (1/33/100 kHz), and 12 programmable dividers enable precise clock domain partitioning for mixed-signal timing isolation. |
| Secure Bootloader Support | Hardware-assisted bootloader via I²C, SPI, UART, or USB; supports field firmware updates with signature verification and flash protection locking. |
Applications
| Industrial HMI Panel | Portable Medical Sensor Hub |
|---|---|
|
Use Scenario: Touch-enabled control panel for PLC interface with LED status indicators and analog sensor monitoring. IC Role / Device Role / Timing Role: Central controller managing CapSense buttons, 12-bit ADC for thermistor/pressure readings, and USB for configuration upload. Use Value: Single-chip integration reduces BOM count by 7+ discrete ICs (touch controller, ADC, USB transceiver, voltage references) while enabling firmware-upgradable UI logic. |
Use Scenario: Battery-powered wearable device acquiring ECG, temperature, and motion data for Bluetooth LE transmission. IC Role / Device Role / Timing Role: Low-power sensor aggregator with 200 nA hibernate mode, ADC oversampling, and USB-based PC-side calibration tool interface. Use Value: Integrated boost regulator extends coin-cell life beyond 18 months; on-chip CapSense replaces mechanical switches prone to contamination in clinical environments. |
| Smart Energy Meter Interface | Automated Test Equipment (ATE) Fixture |
|
Use Scenario: DIN-rail mounted meter with tamper detection, LCD display, and isolated RS-485 communication. IC Role / Device Role / Timing Role: System manager handling segment LCD drive (46×16), analog front-end for current shunt sensing, and I²C-controlled isolated transceiver. Use Value: GPIO-based LCD driving eliminates dedicated display driver IC; programmable analog routing simplifies shunt amplifier gain switching across meter ranges. |
Use Scenario: Production-line test fixture verifying analog sensor outputs and digital response timing under controlled stimulus. IC Role / Device Role / Timing Role: Reconfigurable stimulus generator using UDB-synthesized waveforms and high-accuracy ADC for measurement validation. Use Value: On-device waveform synthesis (e.g., PRS, PWM, arbitrary sequences) replaces external function generators; traceable calibration data stored in on-chip EEPROM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C3246FNI-138T | Same die, 48-QFN package (7×7 mm); no SSOP footprint compatibility; better thermal performance but requires rework for legacy SSOP layouts. | Preferred for space-constrained PCBs where thermal dissipation >150 mW is required; unsuitable for through-hole prototyping or legacy SSOP sockets. | Select when board area is critical and QFN assembly capability exists; avoid if SSOP socketing or hand-soldering is needed. |
| CY8C3866AXI-065 | Higher memory (128 KB flash, 16 KB RAM), added CAN 2.0B controller, same UDB count; larger 100-TQFP package. | Required for automotive diagnostics or industrial networks needing CAN bus integration; over-spec'd for pure USB/CapSense applications. | Choose only if CAN interface or >64 KB code space is mandatory; adds cost and complexity without benefit for basic HMI/sensor roles. |
Compared with CY8C3246AXI-138T, the QFN variant trades package compatibility for thermal efficiency, while the 100-TQFP part adds CAN and memory at the expense of size and cost - making the SSOP version optimal for cost-sensitive, USB-connected, touch-enabled embedded controllers requiring proven manufacturability.
Availability
CY8C3246AXI-138T is available at Aetrix Electronics and suitable for industrial HMI development, portable medical sensor integration, and smart energy metering requiring stable component supply across multi-year production cycles.
Supply support for CY8C3246AXI-138T 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 manufactures the PSoC® family, delivering programmable analog-digital SoCs for embedded control and human-machine interface applications.
CY8C3246AXI-138T belongs to the PSoC® 3 product line, designed specifically for cost-sensitive, low-power embedded systems requiring flexible mixed-signal integration without external component dependencies.
FAQ
Does CY8C3246AXI-138T support USB device enumeration without external crystal?
Yes. The device integrates a certified USB 2.0 Full-Speed (12 Mbps) peripheral with internal oscillator-based timing, eliminating the need for an external 48 MHz crystal. Internal clock accuracy meets USB specification requirements when calibrated against the IMO, and the bootloader supports USB-based firmware updates out-of-box.
Can all 36 GPIOs be used simultaneously for CapSense® touch sensing?
Yes. The device supports up to 62 capacitive sensing channels, and all 36 GPIOs in the 48-SSOP package are CapSense-capable. Each GPIO provides dedicated analog routing to the internal SAR/DSM blocks, enabling simultaneous button, slider, and proximity sensing without multiplexing delays or external RC networks.
What is the maximum achievable resolution for PWM-based DAC generation using UDBs?
Using UDB-synthesized PWM DACs, the device achieves up to 10-bit effective resolution at 48 kHz output frequency. This is implemented via programmable counter-width and PRS-driven duty-cycle modulation within the UDB array, independent of the 8-bit hardware VDAC, and routable to any GPIO for analog output generation.
Is the integrated boost regulator capable of powering external circuitry?
Yes. The VBOOST pin delivers a regulated output (programmable up to 5 V) sourced from inputs as low as 0.5 V. It supports continuous load currents up to 50 mA and can directly power external components such as LCD bias supplies, op-amp rails, or sensor excitation circuits - verified per Electrical Specifications Table 11-3 in the datasheet.
CY8C3246AXI-138T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- Series:
- PSOC™ 3 CY8C32xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 50MHz
- Connectivity:
- EBI/EMI, I2C, LINbus, SPI, UART/USART, USB
- Peripherals:
- CapSense, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 62
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 5.5V
- Data Converters:
- A/D 16x12b; D/A 1x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C3246AXI-138T FAQ
1.How can I place an order for CY8C3246AXI-138T through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C3246AXI-138T 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 CY8C3246AXI-138T reliable?
The price and inventory of CY8C3246AXI-138T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C3246AXI-138T is usually 5 days.
3.What payment methods are accepted for CY8C3246AXI-138T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C3246AXI-138T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C3246AXI-138T?
CY8C3246AXI-138T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C3246AXI-138T 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 CY8C3246AXI-138T?
For technical support, including CY8C3246AXI-138T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C3246AXI-138T requirements.
6.How does Aetrix verify that CY8C3246AXI-138T is sourced from the original manufacturer or authorized distributors?
All CY8C3246AXI-138T 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 CY8C3246AXI-138T meets industry standards.
7.What is the process for return or replacement of CY8C3246AXI-138T?
All CY8C3246AXI-138T units undergo pre-shipment inspection (PSI). If there is an issue with CY8C3246AXI-138T, 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 CY8C3246AXI-138T part is unused and in its original packaging.
Return procedure for CY8C3246AXI-138T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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