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Infineon Technologies CY7C63743C-SXCT
- Part No.:
- CY7C63743C-SXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY7C63743C-SXCT.pdf
- Description:
- IC MCU 8K LS USB/PS-2 24-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,190
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Product details
Overview
CY7C63743C-SXCT from Cypress Semiconductor is an 8-bit RISC one-time-programmable (OTP) microcontroller integrating low-speed USB 2.0 and PS/2 dual-mode peripheral control, featuring 8 KB EPROM, 256 bytes RAM, internal 6-MHz oscillator, and 16 GPIO pins with 50 mA sink capability per pin. It eliminates external crystal, pull-up resistors, and mode-switching components for mice, gamepads, and joysticks.
For engineers reviewing the CY7C63743C-SXCT datasheet, CY7C63743C-SXCT pinout, CY7C63743C-SXCT application, or CY7C63743C-SXCT equivalent, key selection criteria include dual-mode auto-configuration without GPIO overhead, integrated 3.3V regulator for D– pull-up, USB HID 1.1 compliance, and 24-pin SOIC/QSOP/PDIP package compatibility.
Technical Context
The CY7C63743C implements a Harvard-architecture RISC core running at 12 MHz CPU clock derived from internal 6-MHz oscillator (±1.5% USB-tuned accuracy) or optional external 6-MHz ceramic resonator. Its USB Serial Interface Engine (SIE) supports one device address and three endpoints (Control, Interrupt, Bulk), with D+/D– pins multiplexed as PS/2 SCLK/SDATA.
It integrates four 8-bit input capture timers (two per P0.0/P0.1), a 12-bit free-running timer with 128-μs/1.024-ms interrupt outputs, maskable GPIO interrupts on all 16 I/O pins, and internal brown-out reset at 3.75 V. Operating voltage is 4.0–5.5 VDC; temperature range is 0°C to 70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 2.0 low-speed (1.5 Mbps); HID 1.1 compliant - enables plug-and-play operation with host OS without custom drivers |
| Memory | 8 KB OTP EPROM + 256 bytes RAM - sufficient for full HID descriptor, report handling, and PS/2 protocol stack in single firmware image |
| GPIO | 16 programmable I/O pins (P0[7:0], P1[7:0]), 50 mA sink per pin - drives LEDs, switches, and RF receiver modules directly without external buffers |
| Internal Oscillator | 6-MHz ±1.5% (USB-tuned) - eliminates external crystal/resonator, reducing BOM count and board area by ≥2 components |
| USB Pull-up | Integrated 3.3V regulator on VREG/P2.0 - powers 1.3-kΩ D– pull-up resistor internally, removing need for external LDO or resistor network |
| Capture Timers | Four 8-bit registers (two per P0.0/P0.1) - captures edge timestamps for wireless RF signal decoding without CPU polling |
| Supply Range | 4.0 V to 5.5 VDC - compatible with standard 5 V rail in PS/2 peripherals and USB bus-powered designs |
Pinout & Package
CY7C63743C-SXCT is available in 24-pin SOIC, 24-pin PDIP, and 24-pin QSOP packages. All variants share identical pin mapping and electrical characteristics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 21, 22, 23, 24 | P0.0–P0.7 | Port 0 GPIO; P0.0/P0.1 feed Capture Timers A/B - enables direct RF pulse timing for wireless peripherals |
| 5, 6, 7, 8, 17, 18, 19, 20 | P1.0–P1.7 | Port 1 GPIO; all pins support maskable interrupts and 50 mA sink - suitable for button matrix scanning and LED drive |
| 13, 14 | D+/SCLK, D–/SDATA | USB differential pair / PS/2 bidirectional data clock - auto-configures mode via traffic detection; no external mode-select logic required |
| 11 | VCC | Main power supply (4.0–5.5 V) - powers core, USB transceiver, and I/O banks |
| 9, 10 | VSS | Dual ground pins - reduces noise coupling between analog (USB transceiver) and digital (core/I/O) sections |
| 12 | VREG/P2.0 | 3.3V regulated output for USB D– pull-up; also functions as general-purpose input - removes external regulator and resistor |
| 15 | XTALIN/P2.1 | Optional 6-MHz resonator input or general-purpose input - used only if higher clock precision than internal oscillator is required |
| 16 | XTALOUT | Oscillator output - left unconnected when using internal oscillator mode |
| 10 | VPP | Programming voltage pin - grounded during normal operation; required only during OTP programming |
Key Features
| Feature | Design Value |
|---|---|
| Crystalless USB operation | Internal 6-MHz oscillator meets USB low-speed timing tolerance (±1.5%) - eliminates crystal, load capacitors, and layout sensitivity |
| Dual-mode auto-configuration | USB/PS/2 mode selected automatically by host handshake - no firmware GPIO management or external mode-switching circuitry needed |
| Integrated 3.3V USB pull-up regulator | VREG pin delivers stable 3.3V to 1.3-kΩ D– pull-up - removes discrete LDO, feedback resistors, and decoupling caps |
| High-drive GPIO | 50 mA sink per pin across all 16 I/O - directly drives RGB LEDs, buzzer coils, or optocoupler inputs without external drivers |
| Input capture timers | Four 8-bit registers tied to P0.0/P0.1 - captures RF carrier timing edges for wireless mouse/gamepad synchronization without CPU overhead |
Applications
| Wireless Optical Mouse | Gaming Gamepad |
|---|---|
|
Use Scenario: Battery-powered optical mouse with 2.4 GHz RF link to PC. IC Role / Device Role / Timing Role: Dual-mode peripheral controller managing USB HID report generation and PS/2 fallback; captures RF packet timing via P0.0/P0.1. Use Value: Eliminates crystal and pull-up resistor, reducing PCB area by 3.2 mm² and BOM cost by $0.18; internal wake-up timer enables <100 μA suspend current. |
Use Scenario: Multi-button, analog-stick gamepad supporting both USB and legacy PS/2 ports. IC Role / Device Role / Timing Role: Single-chip interface translating button/stick states into HID reports or PS/2 scan codes; uses P1.x for tactile switch scanning. Use Value: No mode-selection hardware or firmware GPIO arbitration - host-initiated protocol negotiation ensures zero-latency mode switching. |
| Industrial Joystick | POS Peripheral Keyboard |
|
Use Scenario: Ruggedized joystick for factory HMI with ESD-prone environment. IC Role / Device Role / Timing Role: Robust I/O controller with 50 mA sink per pin driving mechanical limit switches and status LEDs; USB HID Class-compliant reporting. Use Value: High-current GPIO tolerates contact bounce and ESD transients up to ±8 kV (HBM); internal brown-out reset prevents lockup during 5 V rail sag. |
Use Scenario: Point-of-sale keyboard with mixed membrane and mechanical keys. IC Role / Device Role / Timing Role: Scan matrix of 64 keys and generate PS/2 scancodes or USB HID keyboard reports based on host enumeration. Use Value: Shared D+/D– pins reduce connector count; internal pull-ups on SCLK/SDATA eliminate 2 external 10-kΩ resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-speed USB and PS/2 peripheral controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C63723C | 18-pin SOIC/PDIP; 8 GPIO (P0[7:0] only); no P1 port; same core, memory, and USB/PS/2 engine | Limited to simpler peripherals (e.g., basic mice) due to fewer I/O pins and no capture timers on P1 | Select when design requires ≤8 GPIO and minimal PCB area; not suitable for multi-function gamepads or RF timing capture |
| AN1181 (Microchip) | 8-bit PIC16F631-based; USB 1.1 only; no PS/2 mode; requires external 48-MHz oscillator for USB clock synthesis | Supports USB HID only; lacks native PS/2 fallback and auto-configuration logic | Choose only for USB-only designs where PS/2 compatibility is unnecessary and external clocking is acceptable |
Compared with CY7C63723C and AN1181, CY7C63743C-SXCT uniquely delivers full 16-GPIO flexibility, dual-mode auto-detection without firmware intervention, and integrated timing capture-enabling single-firmware wireless peripherals with USB/PS/2 interoperability and reduced component count.
Availability
CY7C63743C-SXCT is available at Aetrix Electronics and suitable for industrial human-machine interfaces, gaming peripherals, and point-of-sale terminals requiring stable component supply and long-term lifecycle support.
Supply support for CY7C63743C-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 fabless semiconductor company specializing in USB, memory, and programmable system-on-chip solutions for embedded applications.
CY7C63743C belongs to the enCoRe™ USB family, designed specifically to minimize external components in dual-mode USB/PS/2 peripherals while maintaining full HID compliance and real-time I/O responsiveness.
FAQ
Is CY7C63743C-SXCT still recommended for new designs?
No. Cypress explicitly marks CY7C63743C as "Not Recommended for New Designs" in its official datasheet (Rev. *D, October 2010). This reflects end-of-life planning and lack of ongoing process node migration. Aetrix Electronics maintains limited legacy stock for replacement and maintenance programs but advises evaluating Infineon's XMC1000 or EZ-USB™ FX3 families for new projects requiring USB 2.0 functionality.
Does CY7C63743C-SXCT require an external crystal for USB operation?
No. The device features an internal 6-MHz oscillator tuned to ±1.5% accuracy, meeting USB low-speed timing requirements without any external crystal or resonator. An external 6-MHz ceramic resonator is optional and only used when tighter clock precision is needed - it connects to XTALIN/P2.1 and XTALOUT pins.
How does dual-mode USB/PS/2 auto-configuration work without GPIO control?
The USB Serial Interface Engine (SIE) detects host-initiated traffic on D+/D– lines to determine protocol: USB reset signaling triggers USB mode; PS/2 clock/data handshaking activates PS/2 mode. Internal logic routes signals and enables appropriate pull-ups and interrupt handlers - no firmware GPIO manipulation or external mode-select circuitry is required.
What is the function of the VREG/P2.0 pin?
VREG/P2.0 provides a regulated 3.3V output (±5%) to drive the mandatory 1.3-kΩ pull-up resistor on the USB D– line. During normal operation, it sources ~250 µA. When unused, it can serve as a general-purpose input (P2.0). It must not be loaded beyond its specified current limit to maintain USB compliance.
CY7C63743C-SXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- enCoRe™
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 3.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
CY7C63743C-SXCT FAQ
1.How can I place an order for CY7C63743C-SXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C63743C-SXCT 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 CY7C63743C-SXCT reliable?
The price and inventory of CY7C63743C-SXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C63743C-SXCT is usually 5 days.
3.What payment methods are accepted for CY7C63743C-SXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C63743C-SXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C63743C-SXCT?
CY7C63743C-SXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C63743C-SXCT 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 CY7C63743C-SXCT?
For technical support, including CY7C63743C-SXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C63743C-SXCT requirements.
6.How does Aetrix verify that CY7C63743C-SXCT is sourced from the original manufacturer or authorized distributors?
All CY7C63743C-SXCT 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 CY7C63743C-SXCT meets industry standards.
7.What is the process for return or replacement of CY7C63743C-SXCT?
All CY7C63743C-SXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C63743C-SXCT, 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 CY7C63743C-SXCT part is unused and in its original packaging.
Return procedure for CY7C63743C-SXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C63743C-SXCT Tags
-
CYPD3175-24LQXQ
Infineon Technologies
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SLB9672VU20FW1523XTMA1
Infineon Technologies
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SLB9670VQ20FW785XTMA1
Infineon Technologies
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SLB9672XU20FW1523XTMA1
Infineon Technologies
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SLB9673XU20FW2613XTMA1
Infineon Technologies
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CYPD3125-40LQXIT
Infineon Technologies
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AT97SC3204-U2A1A-20
Microchip Technology
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AT97SC3204-U2A1A-10
Microchip Technology
-
SLM9670AQ20FW1311XTMA1
Infineon Technologies
-
SLB9672XU20FW1613XTMA1
Infineon Technologies
-
SLB9672AU20FW1613XTMA1
Infineon Technologies
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SLB9673AU20FW2613XTMA1
Infineon Technologies
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