Infineon Technologies CY7C63823-SXC

Overview

CY7C63823-SXC from Cypress Semiconductor is an 8-bit flash-programmable enCoRe™ II low-speed USB peripheral controller with integrated USB transceiver, crystalless 24 MHz oscillator (±1.5%), dual 3.3 V regulators (125 mA main, dedicated USB PHY), and support for USB HID v1.1 and PS/2 dual-mode operation in a 24-pin SOIC package. It targets HID peripherals requiring minimal external components.

For engineers reviewing the CY7C63823-SXC datasheet, CY7C63823-SXC pinout, CY7C63823-SXC application, or CY7C63823-SXC equivalent, key selection criteria include its USB 2.0 compliance (TID #40000085), 20 GPIO pins with configurable 50 mA sink on designated pins, 8 KB flash + 256 B RAM, 12-bit programmable interval timer, and sleep current of 10 µA.

Technical Context

The device implements a Harvard-architecture M8C CPU running at up to 24 MHz, with internal clock tuning synchronized to USB traffic for ±1.5% accuracy. Its USB Serial Interface Engine (SIE) handles all protocol-layer tasks including endpoint 0 control transfers and dual data endpoints (IN/OUT), eliminating host-side firmware complexity.

It integrates dual voltage regulation: a 125 mA 3.3 V regulator for external peripherals and a dedicated 3.3 V USB PHY regulator enabling compliant D– line pull-up without external components. The 3.3 V I/O bank (4 pins) supports CMOS/TTL inputs, open-drain outputs, and internal pull-ups - critical for direct PS/2 bus interfacing.

Key Specifications

Pinout & Package

Package: 24-pin SOIC (Small Outline Integrated Circuit), 300 mil width, RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C63822-SXC, this part enables larger firmware and data retention; compared with CY7C63823-PC, it offers higher density and reflow-compatible packaging for modern SMT production - making it optimal for volume-manufactured USB peripherals.

Availability

CY7C63823-SXC is available at Aetrix Electronics and suitable for optical mice, gaming controllers, barcode scanners, and POS terminal keypads requiring stable component supply across industrial and consumer electronics programs.

Supply support for CY7C63823-SXC 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 solutions, USB connectivity, and mixed-signal ICs.

The enCoRe™ II product line was designed specifically for cost-sensitive, low-speed USB peripheral applications - integrating USB PHY, regulators, oscillator, and HID firmware infrastructure to eliminate discrete support components.

FAQ

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

No. It features a crystalless 24 MHz internal oscillator tuned to USB timing requirements (±1.5%) using USB packet timing feedback. An external 12 MHz or 24 MHz clock may be used for higher precision, but is optional - not required for USB-IF certification or basic enumeration.

Can CY7C63823-SXC 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 detection - not simultaneous operation. Mode switching requires hardware reset and re-enumeration; however, no external components or GPIO pins are needed to manage the transition.

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

Five designated GPIO pins support configurable 50 mA sink current (in addition to standard 2 mA source). This is confirmed in the DC Characteristics table (Section 74) and enables direct drive of LEDs, small relays, or buzzer circuits without external transistors.

Is in-system reprogramming supported over USB?

Yes. The device supports USB-based bootloader functionality (AN6075), allowing firmware updates in the field without requiring a dedicated programmer. Flash memory is organized to support safe dual-bank updates with rollback capability.