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Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

Infineon Technologies CY7C63743-PC

Name: CY7C63743-PC
Brand: Infineon Technologies
SKU: CY7C63743-PC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY7C63743-PC

Manufacturer:: Infineon Technologies

Category:: Application Specific Microcontrollers

Package:: 24-DIP (0.300", 7.62mm)

Datasheet:: CY7C63743-PC.pdf

Description:: IC MCU 8K LS USB/PS-2 24-DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CY7C63743-PC from Cypress Semiconductor is an 8-bit RISC one-time-programmable (OTP) microcontroller integrating low-speed USB 2.0 and PS/2 interface logic, 8 KB EPROM, 256 bytes RAM, and a crystalless internal oscillator. It supports auto-configurable dual-mode operation (USB or PS/2) without external mode-switching components, delivers 50 mA sink per GPIO pin, and operates from 4.0 V to 5.5 V at 0°C to 70°C - deployed in wired/wireless human-interface devices like optical mice and gamepads.

For engineers reviewing the CY7C63743-PC datasheet, CY7C63743-PC pinout, CY7C63743-PC application, or CY7C63743-PC equivalent, key selection criteria include dual-mode interface autonomy, integrated 3.3 V USB pull-up regulator, 16 GPIO with edge-triggered capture timers, internal wake-up timer for suspend recovery, and OTP programmability for cost-sensitive HID peripherals.

Technical Context

The CY7C63743-PC implements a Harvard-architecture 8-bit RISC core with 12 MHz internal CPU clock and 6 MHz USB-tuned oscillator (±1.5% accuracy), eliminating external crystals. Its integrated USB Serial Interface Engine (SIE) supports one device address and three endpoints (control, interrupt, bulk), while PS/2 mode uses shared D+/D– pins as SCLK/SDATA with internal pull-ups and activity detection interrupt.

It features two 8-bit I/O ports (P0.0–P0.7, P1.0–P1.7), four 8-bit input capture registers tied to P0.0/P0.1, and a 12-bit free-running timer generating 128 µs and 1.024 ms interrupts. The internal 3.3 V regulator (VREG/P2.0) powers the USB D– pull-up resistor, and brown-out reset activates at 3.75 V during suspend.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	8-bit RISC Harvard architecture with 14-bit program counter supporting 8 KB EPROM
USB Compliance	Low-speed USB 2.0 and HID 1.1 compliant; single device address, three endpoints
Operating Voltage	4.0 V to 5.5 V DC - enables direct connection to standard 5 V supply rails without LDO
GPIO Capability	16 total pins (Port 0 + Port 1); each sinks 50 mA, configurable as CMOS/open-drain/pull-up/high-Z
Timing Resources	12-bit free-running timer (1 MHz clock), four 8-bit input capture registers, programmable prescalers
Power Management	Internal wake-up timer for suspend mode; low-voltage reset at 3.75 V; brown-out reset in suspend
Package Options	24-pin SOIC, 24-pin PDIP, 24-pin QSOP - all with identical pinout and thermal profile

Pinout & Package

Available in 24-pin SOIC, PDIP, and QSOP packages (0.300" wide SOIC, 0.300" wide PDIP, 0.154" wide QSOP). All variants share identical pin mapping and thermal characteristics.

Pin/Terminal	Circuit Role	Design Meaning
VCC (Pin 14)	Primary power supply	4.0–5.5 V DC input; powers core, I/O, and USB transceiver
VSS (Pins 9, 10)	Digital ground	Dual ground pins reduce noise coupling and improve EMI performance
D+/SCLK (Pin 13)	USB D+ / PS/2 clock	Bidirectional signal; auto-switches function based on detected bus protocol
D–/SDATA (Pin 12)	USB D– / PS/2 data	Bidirectional signal; includes internal 3.3 V regulator output (VREG) for D– pull-up
VREG/P2.0 (Pin 11)	3.3 V regulated output / GPIO	Provides 1.3 kΩ pull-up current for USB D–; also functions as general-purpose input
P0.0–P0.7 (Pins 1–4, 21–24)	Port 0 GPIO	Eight programmable I/O; P0.0 and P0.1 feed capture timers A/B for RF or encoder timing
P1.0–P1.7 (Pins 5–8, 17–20)	Port 1 GPIO	Eight additional GPIO; all support maskable interrupts and edge-polarity configuration
XTALIN/P2.1 (Pin 12)	Oscillator input / GPIO	Accepts 6 MHz ceramic resonator or external clock; defaults to internal oscillator when unconnected
XTALOUT (Pin 13)	Oscillator output	Drives external resonator; unused in crystalless mode; may be repurposed as GPIO if needed
VPP (Pin 10)	Programming voltage	12.5 V input during OTP programming; grounded during normal operation

Key Features

Feature	Design Value
Crystalless USB oscillator	Eliminates external crystal/resonator; achieves ±1.5% USB timing accuracy via internal tuning
Dual-mode auto-detection	Hardware-level USB/PS/2 protocol recognition without firmware polling or GPIO mode control
Integrated 3.3 V USB regulator	Dedicated VREG pin supplies precise 3.3 V for D– pull-up resistor - no external LDO required
Input capture timers	Four 8-bit registers (two per P0.0/P0.1) enable precise edge-timing measurement for RF receivers or encoders
Suspend-mode wake-up timer	Internal low-power timer generates periodic interrupts during USB suspend - zero external components needed
High-drive GPIO	All 16 pins sink 50 mA individually - directly drive LEDs, small relays, or optocouplers without buffers

Applications

Optical Mouse

Gaming Controller

Use Scenario: Wired optical mouse with scroll wheel and multiple buttons, requiring plug-and-play compatibility across Windows, macOS, and Linux.

IC Role / Device Role / Timing Role: Primary HID controller managing optical sensor data, button state, and USB/PS/2 protocol translation.

Use Value: Dual-mode support enables single-BOM design for global markets; internal oscillator reduces BOM count by one component versus crystal-based alternatives.

Use Scenario: USB/PS/2-compatible gamepad with analog stick, trigger buttons, and vibration feedback.

IC Role / Device Role / Timing Role: Real-time HID report generation engine with low-latency GPIO response and endpoint buffering.

Use Value: 50 mA GPIO drive capability powers haptic motor drivers directly; capture timers synchronize with encoder pulses for precise analog stick position tracking.

Wireless Keyboard Dongle

Industrial Keypad Interface

Use Scenario: 2.4 GHz RF dongle translating proprietary keyboard telemetry into standard USB HID reports.

IC Role / Device Role / Timing Role: RF packet decoder and USB HID translator with wake-on-keypress from suspend.

Use Value: Input capture timers decode RF carrier timing; internal wake-up timer enables sub-100 ms resume latency after key press detection.

Use Scenario: Ruggedized industrial keypad used in factory HMIs with metal enclosure and ESD-prone environment.

IC Role / Device Role / Timing Role: ESD-hardened interface controller handling matrix scanning, debounce, and USB/PS/2 reporting.

Use Value: High-current GPIO drives LED indicators through long traces; open-drain mode supports 5 V tolerant inputs for legacy panel integration.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-speed USB + PS/2 peripheral controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY7C63723-PC	18-pin SOIC/PDIP; only 10 GPIO (P0.0–P0.7, P1.0–P1.1); no P1.2–P1.7 or P0.4–P0.5	Limited I/O count restricts use to simpler HID devices (e.g., basic mice without side buttons or RGB LEDs)	Select when BOM cost and board space are critical and full 16-GPIO functionality is unnecessary.
AN10832 (Microchip)	8-bit PIC16F-based; requires external 6 MHz crystal; no integrated USB pull-up regulator; separate PS/2 firmware stack	Higher component count and firmware complexity; lacks hardware-level dual-mode auto-detection	Choose only if existing PIC toolchain and codebase justify added design effort and validation overhead.

Compared with CY7C63723-PC, the CY7C63743-PC adds six GPIO and full port flexibility for multi-function HID; versus AN10832, it eliminates crystal, regulator, and PS/2 mode management code - reducing time-to-market and test burden.

Availability

CY7C63743-PC is available at Aetrix Electronics and suitable for optical mice, gaming controllers, wireless dongles, and industrial keypads requiring stable component supply, long-lifecycle support, and consistent OTP programming yield.

Supply support for CY7C63743-PC 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) designs high-performance mixed-signal ICs for USB, memory, and programmable systems, with headquarters in San Jose, CA.

The enCoRe™ USB product line targets cost-sensitive human-interface peripherals, emphasizing component reduction, dual-protocol autonomy, and production-ready OTP firmware deployment.

FAQ

Does CY7C63743-PC require an external crystal for USB operation?

No. The device integrates a crystalless oscillator tuned to ±1.5% accuracy for USB low-speed timing. An external 6 MHz ceramic resonator is optional for tighter tolerance but not required. Internal oscillator mode enables faster wake-up from suspend and eliminates BOM cost and layout area associated with crystals.

How does dual-mode USB/PS/2 switching work without GPIO control?

Hardware-level bus detection determines mode: presence of USB reset signaling activates USB SIE; absence triggers PS/2 mode with internal pull-ups on D+/D– (used as SCLK/SDATA) and dedicated PS/2 activity interrupt. No firmware intervention or GPIO pin assignment is needed for mode selection.

What is the maximum sink current per GPIO pin, and can it drive LEDs directly?

Each GPIO pin sinks up to 50 mA continuously. This allows direct driving of standard 20 mA LEDs (with appropriate series resistors) or small indicator lamps without external drivers. Total package current remains within safe limits when ≤8 pins operate at full sink simultaneously.

Is CY7C63743-PC still in active production and supported for new designs?

Yes. Though introduced in 2004, CY7C63743-PC remains actively manufactured and stocked by Infineon and authorized distributors. Aetrix Electronics maintains full traceable inventory and provides lifecycle coordination, including last-time-buy planning and OTP programming support for new HID product introductions.

CY7C63743-PC Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: enCoRe™

Package/Case:: 24-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Applications:: USB Microcontroller

Core Processor:: M8B

Program Memory Type:: OTP (8kB)

Controller Series:: CY7C637xx

RAM Size:: 256 x 8

Interface:: PS/2, USB

Number of I/O:: 16

Voltage - Supply:: 4V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 24-PDIP

CY7C63743-PC FAQ

1.How can I place an order for CY7C63743-PC through Aetrix?

Please submit a Request for Quotation (RFQ) for CY7C63743-PC 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 CY7C63743-PC reliable?

The price and inventory of CY7C63743-PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C63743-PC is usually 5 days.

3.What payment methods are accepted for CY7C63743-PC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C63743-PC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY7C63743-PC?

CY7C63743-PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY7C63743-PC 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 CY7C63743-PC?

For technical support, including CY7C63743-PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C63743-PC requirements.

6.How does Aetrix verify that CY7C63743-PC is sourced from the original manufacturer or authorized distributors?

All CY7C63743-PC 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 CY7C63743-PC meets industry standards.

7.What is the process for return or replacement of CY7C63743-PC?

All CY7C63743-PC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C63743-PC, 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 CY7C63743-PC part is unused and in its original packaging.

Return procedure for CY7C63743-PC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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