Infineon Technologies CY8C3245LTI-163

Overview

CY8C3245LTI-163 from Infineon Technologies (acquired Cypress Semiconductor) is a programmable 8-bit PSoC® 3 mixed-signal SoC featuring an enhanced 50 MHz single-cycle 8051 CPU, 32 KB flash, 2 KB EEPROM, and configurable analog/digital peripherals including Delta-Sigma ADC (12-bit), dual comparators, 8-bit DAC, USB 2.0 FS interface, and CapSense® support for up to 62 sensors - deployed in industrial HMI, medical sensor nodes, and battery-powered control systems.

For engineers reviewing the CY8C3245LTI-163 datasheet, CY8C3245LTI-163 pinout, CY8C3245LTI-163 application, or CY8C3245LTI-163 equivalent, key selection criteria include its 48-pin SSOP package, 1.71–5.5 V operation, 200 nA hibernate mode with RAM retention, USBIO routing capability, and UDB-based reconfigurable digital logic for custom protocol implementation.

Technical Context

The CY8C3245LTI-163 implements a tightly integrated mixed-signal architecture where the 8051 CPU core operates at up to 50 MHz via PLL-driven clock tree, with DMA-controlled data movement across 24 Universal Digital Blocks (UDBs) and dedicated TCPWM, I²C, and USB 2.0 FS modules. Its analog subsystem centers on a rail-to-rail Delta-Sigma ADC with ±1 LSB INL/DNL, 1.024 V ±1% internal reference, and two voltage comparators with SIO-capable inputs.

Digital signal routing is managed by the Digital System Interconnect (DSI), enabling any peripheral output-including USB D+/D−, PWM, UART, or PRS-to be assigned to any GPIO or SIO pin. Power management includes four independent VDDIO domains, a 0.5–5.0 V boost regulator (VBOOST), and three low-power states: active (1.2 mA @ 6 MHz), sleep (1 µA), and hibernate (200 nA with RAM retention).

Key Specifications

Pinout & Package

This device is packaged in a 48-pin SSOP (Shrink Small Outline Package) with 0.635 mm pitch, lead-free finish, and thermal pad not present. Pin functions are validated per Cypress document #001-92498 (Fig. 2-3) and include dedicated USBIO (P15[6]/P15[7]), SIO (P12[0]–P12[3]), and multi-function GPIOs with configurable drive strength and thresholds.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal SoC applications.

Compared with CY8C3245LTI-163, the CY8C3246LTI-164 offers scalable memory for future firmware growth, while the CY8C4014LQI-422 trades USB and analog depth for lower static power and Cortex-M0 ecosystem alignment - making the CY8C3245LTI-163 optimal for legacy-compatible, USB-integrated, analog-rich embedded control.

Availability

CY8C3245LTI-163 is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical sensor nodes, and smart home energy monitors requiring stable component supply across long-lifecycle production programs.

Supply support for CY8C3245LTI-163 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 mixed-signal solutions for industrial, automotive, and IoT applications with emphasis on integration and power efficiency.

The CY8C32 series belongs to the PSoC® 3 product line, designed specifically for 8-bit embedded control applications demanding high analog precision, USB connectivity, and field-reconfigurable logic - targeting cost-sensitive yet functionally rich systems where ASIC development is impractical.

FAQ

Does CY8C3245LTI-163 support USB device enumeration without an external crystal?

Yes. The device integrates a factory-trimmed 48 MHz internal main oscillator (IMO) that meets USB full-speed timing requirements (±0.25% tolerance) when used with the on-chip PLL. This eliminates the need for an external 12 MHz crystal, reducing BOM count and PCB layout complexity while maintaining USB compliance per TID#40770053 certification.

Can the Delta-Sigma ADC operate simultaneously with USB data transfer?

Yes. The ADC and USB subsystems operate on independent clock domains and share no critical resources. DMA channels can autonomously move ADC conversion results to memory while the CPU handles USB packet assembly - verified in AN57821 and confirmed by simultaneous operation testing in CY8CKIT-030 evaluation platform documentation.

What is the maximum sustained current capability of SIO pins in sink mode?

Each SIO pin supports up to 25 mA DC sink current, with total group current limited to 100 mA per VDDIO domain (per Fig. 2-2, datasheet #001-92498). This is validated under 1.71–5.5 V supply and –40°C to +85°C ambient conditions, making it suitable for direct LED driving or relay coil control without external drivers.

Is CapSense® functionality available on all GPIO pins, including those shared with USBIO?

No. CapSense® is supported on all standard GPIO pins (e.g., P0[0]–P0[7], P1[0]–P1[7], P2[3]–P2[7]) but not on USBIO pins (P15[6]/P15[7]) when configured for USB D+/D− operation. When USBIO pins are repurposed as general-purpose GPIO, CapSense® is enabled - however, this disables USB functionality and requires careful routing to avoid noise coupling into sensitive analog measurements.