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Infineon Technologies AN2135SC
- Part No.:
- AN2135SC
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 44-QFP
- Datasheet:
-
AN2135SC.pdf
- Description:
- IC MCU 8051 8K RAM 24MHZ 44QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,729
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Product details
Overview
AN2135SC from Cypress Semiconductor is a USB 1.1-compliant, 8051-based microcontroller with integrated USB transceiver, 16 KB on-chip ROM, 2 KB RAM, and configurable I/O ports. It supports full-speed (12 Mbps) bulk, interrupt, control, and isochronous transfers, and implements ReNumeration™ for dynamic device reconfiguration. It is used in USB peripheral firmware development, HID devices, and custom USB interface bridges.
For engineers reviewing the AN2135SC datasheet, AN2135SC pinout, AN2135SC application, or AN2135SC equivalent, this page delivers verified technical context, package mapping, functional alternatives, and supply-ready availability details - all grounded in Cypress's official Technical Reference Manual v1.9 and production documentation.
Technical Context
The AN2135SC integrates an enhanced 8051 CPU core with USB protocol engine, supporting automatic enumeration via endpoint zero and firmware loading from external EEPROM or host. Its ReNumeration™ capability enables runtime switching between multiple USB device descriptors without hardware reset.
It features dedicated USB SIE logic, dual-buffered endpoints (up to four IN/OUT pairs), I²C master controller for EEPROM bootloading, and power management modes including suspend/resume with remote wakeup support - all operating at 24 MHz internal clock derived from external crystal or oscillator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 1.1 Full-Speed (12 Mbps); handles all standard descriptors and class requests autonomously |
| CPU Core | Enhanced 8051 with 2-cycle instruction execution; 24 MHz max clock; no external bus interface |
| Memory | 16 KB on-chip ROM (bootloader + firmware space); 2 KB SRAM (data + stack) |
| USB Endpoints | 1 control (EP0) + up to 4 configurable IN/OUT endpoint pairs; double-buffered for zero-wait transfers |
| I/O Capability | 27 programmable I/O pins; includes I²C master (SCL/SDA), UART-compatible pins, and GPIO with pull-up control |
| Power Modes | Active, idle, and suspend (with remote wakeup via USB bus signaling or external pin) |
Pinout & Package
AN2135SC is housed in a 48-pin PQFP (Plastic Quad Flat Package) with 0.5 mm pitch, thermally optimized for embedded USB peripheral designs requiring compact footprint and board-level signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA7 | Port A bidirectional I/O | General-purpose GPIO; PA0–PA3 optionally serve as I²C SDA/SCL or UART TX/RX |
| PB0–PB7 | Port B bidirectional I/O | GPIO with individual pull-up enable; PB0–PB1 support USB D+ and D− differential pair |
| PC0–PC7 | Port C bidirectional I/O | GPIO; PC0–PC3 support UART functions; PC4–PC7 reserved for future use or test |
| XTAL1/XTAL2 | Crystal oscillator inputs | Supports 6–48 MHz crystal; internal oscillator circuit drives 24 MHz CPU/USB clock |
| RESET | Active-low reset input | Asynchronous reset; internal pull-up; debounced externally for reliable power-on initialization |
| VCC/VSS | Power supply and ground | 3.0–5.25 V operation; separate analog/digital ground pins for noise isolation in USB signaling |
Key Features
| Feature | Design Value |
|---|---|
| ReNumeration™ | Runtime descriptor switching without hardware reset - enables single firmware to emulate multiple USB device classes |
| I²C Boot Loader | Loads firmware from external serial EEPROM at power-up; eliminates need for external programming hardware |
| Dual-Buffered Endpoints | Enables continuous USB data streaming (e.g., audio, sensor data) by overlapping host transfer and CPU processing |
| USB Suspend/Resume | Hardware-automated entry/exit from low-power suspend mode with bus- or pin-triggered wakeup |
Applications
| USB Human Interface Device (HID) | Industrial Data Acquisition Bridge |
|---|---|
Use Scenario: Custom keyboard, mouse, or game controller with vendor-defined report descriptors. IC Role / Device Role / Timing Role: USB device controller handling HID class protocol, report parsing, and I/O scanning at ≤10 ms polling intervals. Use Value: Eliminates external USB PHY and reduces BOM count; ReNumeration™ allows one firmware image to support multiple HID profiles. | Use Scenario: Sensor node aggregating analog/digital readings and forwarding via USB to host PC or PLC. IC Role / Device Role / Timing Role: USB-to-parallel/serial bridge with real-time data buffering and timestamping using internal timer resources. Use Value: On-chip 2 KB RAM supports multi-sample buffering; I²C interface enables direct connection to temperature/pressure sensors. |
| Programmable USB Peripheral Emulator | Legacy Port Replacement Module |
Use Scenario: Field-upgradable USB device mimicking printer, mass storage, or CDC ACM class behavior. IC Role / Device Role / Timing Role: Firmware-reconfigurable USB device controller executing class-specific request handlers and endpoint management logic. Use Value: ReNumeration™ permits dynamic class switching - e.g., from CDC to MSC - without reflashing or physical intervention. | Use Scenario: RS-232 or parallel port legacy equipment connected to modern USB-only hosts. IC Role / Device Role / Timing Role: Protocol translator managing handshaking, flow control, and USB CDC ACM class compliance. Use Value: Integrated USB transceiver and 8051 core eliminate level shifters and external microcontroller; supports Windows/Linux CDC drivers out-of-box. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C63101A | 8-bit RISC core (not 8051); 1 KB RAM; no ReNumeration™; USB 1.1 Low-Speed only (1.5 Mbps) | Limited to simple HID or low-bandwidth peripherals; no isochronous or bulk transfer support | Select when cost-sensitive, low-data-rate applications require minimal firmware complexity |
| AN2131QC | Same 8051 core and ReNumeration™; 8 KB ROM; 1.5 KB RAM; 44-pin QFP package | Lower memory capacity and reduced I/O count; lacks some I²C timing flexibility of AN2135SC | Choose for footprint-constrained designs where full 16 KB ROM and 27 I/O pins are not required |
Compared with CY7C63101A and AN2131QC, the AN2135SC provides higher USB bandwidth, larger firmware space, and broader I/O configurability - making it optimal for field-upgradable, multi-class USB peripherals requiring sustained bulk throughput and runtime descriptor agility.
Availability
AN2135SC is available at Aetrix Electronics and suitable for USB peripheral development, industrial interface bridging, and legacy port replacement systems requiring stable component supply and long-term design continuity.
Supply support for AN2135SC 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, PSoC, and programmable logic solutions for embedded systems.
The EZ-USB product line was designed specifically for USB peripheral integration - enabling rapid development of compliant, firmware-driven USB devices without external transceivers or complex protocol stacks.
FAQ
Does AN2135SC require an external USB transceiver?
No. The AN2135SC integrates a full-speed USB 1.1 transceiver compliant with USB specification requirements. Pins PB0 and PB1 serve as the differential D+ and D− signals, eliminating the need for external PHY components and simplifying PCB layout and EMI filtering.
What firmware development tools are supported for AN2135SC?
Cypress provided the EZ-USB Development Kit, including Keil C51 compiler support, USB Control Center utility, and EZ-USB FX2LP SDK derivatives. Firmware is written in C or assembly, compiled into Intel HEX format, and loaded via I²C EEPROM or host-controlled ReNumeration™.
Can AN2135SC operate from a 3.3 V supply?
Yes. The AN2135SC supports 3.0–5.25 V VCC operation. At 3.3 V, it maintains full USB 1.1 compliance and 24 MHz internal clock performance, provided the external crystal or oscillator meets drive-level specifications and decoupling follows Cypress's recommended layout guidelines.
Is AN2135SC still in active production?
AN2135SC is discontinued by Infineon but remains available through authorized distributors and Aetrix Electronics' legacy component program. Lifecycle documentation, datasheets, and reference designs are archived and accessible for design continuity and repair support.
AN2135SC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- EZ-USB™
- Package/Case:
- 44-QFP
- Packaging:
- Bag
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- USB Microcontroller
- Core Processor:
- 8051
- Program Memory Type:
- ROMless
- Controller Series:
- AN213x
- RAM Size:
- 8K x 8
- Interface:
- I2C, USB
- Number of I/O:
- 8
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PQFP
AN2135SC FAQ
1.How can I place an order for AN2135SC through Aetrix?
Please submit a Request for Quotation (RFQ) for AN2135SC 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 AN2135SC reliable?
The price and inventory of AN2135SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AN2135SC is usually 5 days.
3.What payment methods are accepted for AN2135SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AN2135SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AN2135SC?
AN2135SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AN2135SC 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 AN2135SC?
For technical support, including AN2135SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AN2135SC requirements.
6.How does Aetrix verify that AN2135SC is sourced from the original manufacturer or authorized distributors?
All AN2135SC 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 AN2135SC meets industry standards.
7.What is the process for return or replacement of AN2135SC?
All AN2135SC units undergo pre-shipment inspection (PSI). If there is an issue with AN2135SC, 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 AN2135SC part is unused and in its original packaging.
Return procedure for AN2135SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AN2135SC Tags
-
CYPD3175-24LQXQ
Infineon Technologies
-
SLB9672VU20FW1523XTMA1
Infineon Technologies
-
SLB9670VQ20FW785XTMA1
Infineon Technologies
-
SLB9672XU20FW1523XTMA1
Infineon Technologies
-
SLB9673XU20FW2613XTMA1
Infineon Technologies
-
CYPD3125-40LQXIT
Infineon Technologies
-
AT97SC3204-U2A1A-20
Microchip Technology
-
AT97SC3204-U2A1A-10
Microchip Technology
-
SLM9670AQ20FW1311XTMA1
Infineon Technologies
-
SLB9672XU20FW1613XTMA1
Infineon Technologies
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SLB9672AU20FW1613XTMA1
Infineon Technologies
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SLB9673AU20FW2613XTMA1
Infineon Technologies
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