Infineon Technologies CY7C63823-SXCT

Overview

CY7C63823-SXCT from Cypress Semiconductor is an enCoRe™ II 8-bit flash microcontroller with integrated low-speed USB 2.0 and PS/2 interface, Harvard architecture M8C CPU running up to 24 MHz, 8 KB flash, 256 bytes RAM, and crystalless internal oscillator certified to USB-IF TID #40000085. It serves as a peripheral controller in HID devices requiring minimal external components.

For engineers reviewing the CY7C63823-SXCT datasheet, CY7C63823-SXCT pinout, CY7C63823-SXCT application, or CY7C63823-SXCT equivalent, key selection criteria include USB/PS/2 dual-mode auto-configuration, integrated 3.3 V USB PHY regulator, 20 GPIO with configurable drive strength (up to 50 mA sink), capture timer for RF input timing, and in-system reprogrammability without external programming hardware.

Technical Context

The device implements a dedicated low-speed USB Serial Interface Engine (SIE) supporting one device address, one control endpoint (EP0), and two data endpoints (EP1, EP2), all compliant with USB Specification v2.0 and HID v1.1. Its internal 24 MHz oscillator achieves ±1.5% accuracy during USB traffic, optionally lockable to external 12/24 MHz clock for tighter timing.

It features dual-mode interface logic that automatically detects and configures for USB or PS/2 operation without GPIO mode-control pins or external circuitry. The integrated 3.3 V regulator powers both the USB transceiver (including D– pull-up) and external 3.3 V peripherals (125 mA capability), while four dedicated 3.3 V I/O pins support CMOS/TTL levels with open-drain, pull-up, and high-Z modes.

Key Specifications

Pinout & Package

CY7C63823-SXCT is packaged in a 24-pin SOIC (Small Outline Integrated Circuit) with 300 mil body width, RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-speed USB peripheral controller applications.

Compared with CY7C63822-SXCT, this part offers double flash capacity for complex HID descriptors or multi-protocol firmware; compared with CY7C63823-PC, it delivers the same performance in surface-mount form factor for automated assembly and space-constrained PCBs.

Availability

CY7C63823-SXCT is available at Aetrix Electronics and suitable for optical mouse design, wireless remote receiver development, POS barcode scanner integration, and security dongle production requiring stable component supply and long-term lifecycle assurance.

Supply support for CY7C63823-SXCT 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 U.S.-based semiconductor company specializing in programmable system-on-chip (PSoC) solutions, USB controllers, and mixed-signal ICs for embedded applications.

This device belongs to the enCoRe™ II family-designed specifically to reduce component count in low-speed USB HID peripherals by integrating oscillator, regulators, pull-ups, and dual-mode interface logic into a single 8-bit MCU.

FAQ

Does CY7C63823-SXCT require an external crystal for USB operation?

No. It features a crystalless internal oscillator certified to USB timing accuracy (±1.5% at 24 MHz during traffic). An external 12 MHz or 24 MHz clock may be applied to XTALIN for higher precision, but is optional-not required for USB-IF compliance.

Can CY7C63823-SXCT operate in both USB and PS/2 modes simultaneously?

No. It auto-configures to either USB or PS/2 mode at startup based on host handshake-only one mode is active at a time. The switch is automatic and requires no firmware or GPIO control; both modes share the same physical I/O pins and endpoint structure.

What is the maximum sink current capability of its GPIO pins?

Eight designated GPIO pins (including P0.0–P0.3 and P1.0–P1.3) support configurable sink current: 8 mA or 50 mA per pin. All 20 GPIO pins provide 2 mA source current. Drive strength is set per-port via configuration registers-not per-pin.

Is in-system firmware update supported without external hardware?

Yes. It includes a factory-programmed USB bootloader (AN6075 documented) enabling firmware updates over USB using standard HID-class host software-no external programmer, JTAG, or SWD interface is needed.