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

Infineon Technologies AN2136SC

Name: AN2136SC
Brand: Infineon Technologies
SKU: AN2136SC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AN2136SC

Manufacturer:: Infineon Technologies

Category:: Application Specific Microcontrollers

Package:: 44-QFP

Datasheet:: AN2136SC.pdf

Description:: IC MCU 8051 8K RAM 24MHZ 44QFP

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Product details

Overview

AN2136SC from Cypress Semiconductor is a USB 1.1-compliant, 8051-based microcontroller IC with integrated USB 2.0 transceiver, 16 KB on-chip ROM, 2 KB RAM, and configurable I/O ports - designed for embedded USB peripheral development requiring firmware-reconfigurable enumeration, bulk/isochronous transfer support, and ReNumeration™ capability. It operates at 24 MHz, supports 3.3 V I/O, and targets HID, data acquisition, and custom USB device applications.

For engineers reviewing the AN2136SC datasheet, AN2136SC pinout, AN2136SC application, or AN2136SC equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts - all grounded in Cypress' official EZ-USB Technical Reference Manual v1.9 and production documentation.

Technical Context

The AN2136SC implements a fully integrated USB 1.1 device controller with an enhanced 8051 CPU core, supporting both fixed-function and firmware-defined descriptor handling via ReNumeration™. It includes dedicated USB endpoint buffers (EP0–EP4), automatic data toggle management, and hardware-assisted control transfers.

Its memory architecture combines 16 KB mask-ROM (bootloader + USB stack), 2 KB SRAM, and external memory interface (CS#/OE#) for code/data expansion. Power management supports suspend/resume via USB bus signaling, and I/O ports are software-configurable for bidirectional or open-drain operation with internal pull-ups.

Key Specifications

Parameter	Value and Actual Design Meaning
USB Compliance	USB 1.1 full-speed (12 Mbps); includes physical transceiver, protocol engine, and endpoint FIFOs - enables direct USB connectivity without external PHY.
CPU Core	Enhanced 8051 running at up to 24 MHz; executes from on-chip ROM or external memory - eliminates need for external boot ROM in most designs.
Memory	16 KB mask-ROM (pre-programmed bootloader & USB stack) + 2 KB SRAM - provides deterministic boot and runtime buffer space for multi-endpoint transfers.
Endpoints	Control (EP0) + four configurable bulk/isochronous endpoints (EP1–EP4); each with dedicated 512-byte FIFO - supports concurrent IN/OUT transfers with hardware handshaking.
I/O Ports	Four 8-bit bidirectional ports (P0–P3); software-selectable drive strength and pull-up enable - allows direct connection to switches, LEDs, I²C peripherals, or level-shifted interfaces.
Power Supply	3.3 V ±10% I/O; internal LDO regulates core voltage - simplifies power design and ensures USB signal integrity compliance.

Pinout & Package

AN2136SC is housed in a 48-pin QFP (Quad Flat Package) with 0.5 mm pitch, thermally enhanced for sustained USB data throughput and industrial ambient operation.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Core power supply	3.3 V input for internal logic and USB transceiver; requires local 0.1 µF decoupling.
GND	Ground reference	Common return for analog/digital domains; must be low-impedance plane for EMI control.
D+ / D−	USB differential data pair	Direct connection to USB upstream port; no external termination required - integrated 1.5 kΩ pull-up on D+ for device enumeration.
RESET	Active-low reset input	Asynchronous reset assertion halts CPU and clears endpoint FIFOs; debounced externally or via internal timer.
XTAL1 / XTAL2	Crystal oscillator inputs	Supports 12 MHz or 24 MHz fundamental-mode crystal; determines USB timing accuracy and CPU clock.
P0.0–P0.7	Port 0 I/O	Bidirectional with internal pull-ups; multiplexed with address/data bus when external memory enabled.
P1.0–P1.7	Port 1 I/O	General-purpose I/O; P1.0–P1.3 support alternate functions for I²C (SCL/SDA) and INT0/INT1.

Key Features

Feature	Design Value
ReNumeration™	Firmware-triggered re-enumeration without hardware reset - enables dynamic descriptor switching (e.g., HID ↔ CDC) during runtime.
Hardware Endpoint FIFOs	Dedicated 512-byte buffers per endpoint (EP1–EP4) with automatic ACK/NACK and data toggle - offloads CPU from low-level USB protocol handling.
I²C Controller	Integrated master-only I²C interface on P1.0/P1.1 - supports EEPROM configuration loading and sensor interfacing without external IC.
Bootloader Flexibility	ROM-resident loader supports firmware load via USB EP0 or external serial EEPROM (0xB0/0xB2 header) - eliminates need for external programmer in production.
USB Suspend Detection	Automatic detection of USB suspend state with wake-on-IRQ capability - reduces system power to <100 µA while retaining endpoint state.

Applications

USB Human Interface Device (HID)

Industrial Data Acquisition

Use Scenario: Custom keyboard, joystick, or medical control panel sending reports over USB with zero driver installation on Windows/macOS/Linux.

IC Role / Device Role / Timing Role: USB device controller and HID report generator; handles descriptor negotiation, interrupt IN transfers, and host polling at ≤10 ms intervals.

Use Value: Leverages built-in HID class descriptors and ReNumeration™ to switch between keyboard/mouse/report descriptor sets dynamically - enabling multi-role devices from single firmware image.

Use Scenario: Sensor node collecting temperature, pressure, and analog voltage data, streaming to PC via bulk transfers at 1–10 kHz sample rates.

IC Role / Device Role / Timing Role: USB-to-sensor bridge with real-time buffering; uses dual bulk endpoints (IN/OUT) and hardware FIFOs to sustain 12 Mbps throughput without CPU bottlenecks.

Use Value: 512-byte endpoint buffers and autopointer register reduce firmware overhead by >70% vs. polled byte-by-byte transfer - critical for deterministic sampling timing.

Programmable USB Peripheral

Legacy Interface Adapter

Use Scenario: Field-upgradable USB dongle for proprietary protocols (e.g., lighting control, test equipment), where firmware defines vendor-specific descriptors and endpoints.

IC Role / Device Role / Timing Role: Fully programmable USB device controller; executes custom firmware from ROM or external Flash to implement non-standard class behavior.

Use Value: Mask-ROM bootloader supports field updates via USB without JTAG - reducing BOM cost and enabling secure firmware signing via external EEPROM signature check.

Use Scenario: RS-232 or parallel port legacy device adapter that appears as native USB COM port or printer interface to host OS.

IC Role / Device Role / Timing Role: USB CDC ACM or printer class bridge; maps UART/parallel signals to USB control/bulk endpoints using firmware-managed descriptor tables.

Use Value: Integrated I²C and configurable I/O eliminate external level shifters and glue logic - shrinking PCB area by ≥30% versus discrete USB bridge solutions.

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 only - lacks descriptor flexibility and endpoint count.	Targeted at simple HID or low-bandwidth peripherals; not suitable for isochronous or multi-interface applications.	Select only for cost-sensitive, static-descriptor designs where firmware simplicity outweighs configurability needs.
AN2131QC	Same 8051 core and ROM layout but 44-pin QFP; lacks P1.4–P1.7 and one endpoint buffer - reduced I/O and endpoint concurrency.	Used in space-constrained designs with fewer external interfaces; cannot support simultaneous HID + CDC + bulk streaming.	Choose when board footprint is critical and endpoint/I/O requirements are ≤80% of AN2136SC's capacity.

Compared with CY7C63101A and AN2131QC, AN2136SC uniquely supports runtime descriptor reconfiguration, five endpoints with full FIFO depth, and integrated I²C - making it the only option among the three for adaptive, multi-class USB devices requiring field firmware updates and mixed transfer types.

Availability

AN2136SC is available at Aetrix Electronics and suitable for USB peripheral development, industrial data acquisition systems, and programmable HID device manufacturing requiring stable component supply and long-term lifecycle support.

Supply support for AN2136SC 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 programmable system-on-chip (PSoC), USB, and memory solutions for industrial, automotive, and consumer electronics.

The EZ-USB product line was engineered specifically for embedded USB device development - delivering integrated transceivers, standardized firmware stacks, and ReNumeration™ to accelerate time-to-market for custom USB peripherals without host driver development.

FAQ

Does AN2136SC require an external crystal?

Yes - AN2136SC requires a 12 MHz or 24 MHz fundamental-mode crystal connected to XTAL1/XTAL2 pins. The crystal frequency directly determines USB bit timing accuracy and CPU clock speed; deviation beyond ±0.25% risks USB communication failure. Ceramic resonators are not recommended due to insufficient stability.

Can AN2136SC operate as a USB host?

No - AN2136SC is strictly a USB device controller and lacks host-side transceiver circuitry, session request protocol (SRP), or host stack firmware. It supports only device-mode enumeration, descriptor handling, and endpoint data transfers as defined in USB 1.1 specification.

What is the maximum sustained bulk transfer rate achievable?

AN2136SC achieves up to 900 KB/s sustained bulk IN throughput using double-buffered endpoints and autopointer DMA-like access. This assumes optimal firmware (interrupt-driven, FIFO-optimized), 100% bus utilization, and host-side high-priority scheduling - measured with 512-byte packets at full-speed USB frame rate.

Is the on-chip ROM field-programmable?

No - the 16 KB ROM is mask-programmed during fabrication and contains Cypress' certified USB bootloader and stack. Firmware application code resides in external memory or is loaded into SRAM at runtime; ROM contents cannot be modified post-manufacture.

AN2136SC 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

AN2136SC FAQ

1.How can I place an order for AN2136SC through Aetrix?

Please submit a Request for Quotation (RFQ) for AN2136SC 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 AN2136SC reliable?

The price and inventory of AN2136SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AN2136SC is usually 5 days.

3.What payment methods are accepted for AN2136SC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AN2136SC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AN2136SC?

AN2136SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AN2136SC 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 AN2136SC?

For technical support, including AN2136SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AN2136SC requirements.

6.How does Aetrix verify that AN2136SC is sourced from the original manufacturer or authorized distributors?

All AN2136SC 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 AN2136SC meets industry standards.

7.What is the process for return or replacement of AN2136SC?

All AN2136SC units undergo pre-shipment inspection (PSI). If there is an issue with AN2136SC, 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 AN2136SC part is unused and in its original packaging.

Return procedure for AN2136SC:

1.Submit a request within 90 days.

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

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