MAX3420E
USB Peripheral Controller with SPI Interface
Add USB Functionality with a Single IC
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The MAX3420E contains the digital logic and analog circuitry necessary to implement a full-speed USB peripheral compliant to USB specification rev 2.0. A built-in full-speed transceiver features ±15kV ESD protection and programmable USB connect and disconnect. An internal serial-interface engine (SIE) handles low-level USB protocol details such as error checking and bus retries. The MAX3420E operates using a register set accessed by an SPI™ interface that operates up to 26MHz. Any SPI master (microprocessor, ASIC, DSP, etc.) can add USB functionality using the simple 3- or 4-wire SPI interface.
Internal level translators allow the SPI interface to run at a system voltage between 1.71V and 3.6V. USB timed operations are done inside the MAX3420E with interrupts provided at completion so an SPI master does not need timers to meet USB timing requirements. The MAX3420E includes four general-purpose inputs and outputs so any microprocessor that uses I/O pins to implement the SPI interface can reclaim the I/O pins and gain additional ones.
The MAX3420E operates over the extended -40°C to +85°C temperature range and is available in a 32-pin LQFP package (7mm x 7mm) and a space-saving 24-pin TQFN package (4mm x 4mm).
FAQs: MAX3420E Key Features
- Simplifies Adding USB to Any System
- Microprocessor-Independent USB Solution
- Complies with USB Specification Revision 2.0 (Full-Speed Operation)
- Integrated Full-Speed USB Transceiver
- Firmware/Hardware Control of an Internal D+ Pullup Resistor
- Programmable 3- or 4-Wire 26MHz SPI Interface
- Intelligent USB Serial-Interface Engine (SIE)
- Automatically Handles USB Flow Control and Double Buffering
- Handles Low-Level USB Signaling Details
- Includes Timers for USB Time-Sensitive Operations, So SPI Master Does Not Need to Time Events
- Four General-Purpose Inputs and Four General-Purpose Outputs
- Internal Comparator Detects VBUS for Self-Powered Applications
- Interrupt Output Pin (Level or Programmable Edge) Allows Polled or Interrupt-Driven SPI Interface
- Double-Buffered Data Endpoints Increase Throughput by Allowing the SPI Master to Transfer Data Concurrently with USB Transfers Over the Same Endpoint
- Built-In Endpoint FIFOs
- EP0: CONTROL (64 Bytes)
- EP1: OUT, Bulk or Interrupt, 2 x 64 Bytes (Double-Buffered)
- EP2: IN, Bulk or Interrupt, 2 x 64 Bytes (Double-Buffered)
- EP3: IN, Bulk or Interrupt (64 Bytes)
Applications/Uses
- Cameras
- Cell Phones
- Custom USB Devices
- Desktop Routers
- Instrumentation
- Microprocessors and DSPs
- MP3 Players
- PC Peripherals
- PDAs
- PLCs
- Set-Top Boxes
| VSUPPLY (V) | 3.3 |
| ISUPPLY (mA) (max) | 30 |
| Peripheral Speed (Mbps) | 12 |
| SPI Clock (MHz) | 0 to 26 |
| VL (V) | 1.4 to 3.6 |
| Package/Pins | LQFP/32 TQFN/24 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | $4.23 @1k |
Technical Docs
| Data Sheet | USB Peripheral Controller with SPI Interface | Mar 24, 2016 | |
| Tutorial | Turn Any Video Game Controller into a USB Mouse | ||
| Reference Schematic | Modern PRTD Temperature Sensors and High-Resolution Delta-Sigma ADCs Enable Wide Range High-Accuracy Temperature Measurements | ||
| App Note | Setting Up the Maxim USB Laboratory | ||
| App Note | The Maxim USB Laboratory | ||
| App Note | Isolating USB | ||
| App Note | Practical USB Terminology | ||
| App Note | USB enumeration code (and more) for the MAX3420E | ||
| App Note | Bringing Up a MAX3420E System | ||
| App Note | The MAX3420E Interrupt System | ||
| App Note | Add USB to Anything | ||
| App Note | MAX3420E Programming Guide | ||
| App Note | Frequently Asked Questions About the MAX3420E | ||
| App Note | MAX3420E Information Card |
Click any title below to view the detail page where available.
Description
The MAX3420E evaluation kit-2 (EV kit-2) provides a proven design to evaluate the MAX3420E USB peripheral controller with SPI interface. The EV kit-2 board is jumper-connected to an Atmel® ATtiny2313 microcontroller by default, but can also be connected to any SPI master. The MAX3420E EV kit-2 adds USB functionality to any microcontroller, microprocessor, DSP, CPLD, FPGA, or ASIC with an SPI master interface or five GPIO lines can connect to the MAX3420E EV kit-2.
The EV kit-2 board comes with the MAX3420EECJ+ installed.
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Support & Training
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Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
| VSUPPLY (V) | 3.3 |
| ISUPPLY (mA) (max) | 30 |
| Peripheral Speed (Mbps) | 12 |
| SPI Clock (MHz) | 0 to 26 |
| VL (V) | 1.4 to 3.6 |
| Package/Pins | LQFP/32 TQFN/24 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | $4.23 @1k |
Key Features
- Simplifies Adding USB to Any System
- Microprocessor-Independent USB Solution
- Complies with USB Specification Revision 2.0 (Full-Speed Operation)
- Integrated Full-Speed USB Transceiver
- Firmware/Hardware Control of an Internal D+ Pullup Resistor
- Programmable 3- or 4-Wire 26MHz SPI Interface
- Intelligent USB Serial-Interface Engine (SIE)
- Automatically Handles USB Flow Control and Double Buffering
- Handles Low-Level USB Signaling Details
- Includes Timers for USB Time-Sensitive Operations, So SPI Master Does Not Need to Time Events
- Four General-Purpose Inputs and Four General-Purpose Outputs
- Internal Comparator Detects VBUS for Self-Powered Applications
- Interrupt Output Pin (Level or Programmable Edge) Allows Polled or Interrupt-Driven SPI Interface
- Double-Buffered Data Endpoints Increase Throughput by Allowing the SPI Master to Transfer Data Concurrently with USB Transfers Over the Same Endpoint
- Built-In Endpoint FIFOs
- EP0: CONTROL (64 Bytes)
- EP1: OUT, Bulk or Interrupt, 2 x 64 Bytes (Double-Buffered)
- EP2: IN, Bulk or Interrupt, 2 x 64 Bytes (Double-Buffered)
- EP3: IN, Bulk or Interrupt (64 Bytes)
Applications/Uses
- Cameras
- Cell Phones
- Custom USB Devices
- Desktop Routers
- Instrumentation
- Microprocessors and DSPs
- MP3 Players
- PC Peripherals
- PDAs
- PLCs
- Set-Top Boxes
Description
The MAX3420E contains the digital logic and analog circuitry necessary to implement a full-speed USB peripheral compliant to USB specification rev 2.0. A built-in full-speed transceiver features ±15kV ESD protection and programmable USB connect and disconnect. An internal serial-interface engine (SIE) handles low-level USB protocol details such as error checking and bus retries. The MAX3420E operates using a register set accessed by an SPI™ interface that operates up to 26MHz. Any SPI master (microprocessor, ASIC, DSP, etc.) can add USB functionality using the simple 3- or 4-wire SPI interface.
Internal level translators allow the SPI interface to run at a system voltage between 1.71V and 3.6V. USB timed operations are done inside the MAX3420E with interrupts provided at completion so an SPI master does not need timers to meet USB timing requirements. The MAX3420E includes four general-purpose inputs and outputs so any microprocessor that uses I/O pins to implement the SPI interface can reclaim the I/O pins and gain additional ones.
The MAX3420E operates over the extended -40°C to +85°C temperature range and is available in a 32-pin LQFP package (7mm x 7mm) and a space-saving 24-pin TQFN package (4mm x 4mm).
FAQs: MAX3420E Technical Docs
| Data Sheet | USB Peripheral Controller with SPI Interface | Mar 24, 2016 | |
| Tutorial | Turn Any Video Game Controller into a USB Mouse | ||
| Reference Schematic | Modern PRTD Temperature Sensors and High-Resolution Delta-Sigma ADCs Enable Wide Range High-Accuracy Temperature Measurements | ||
| App Note | Setting Up the Maxim USB Laboratory | ||
| App Note | The Maxim USB Laboratory | ||
| App Note | Isolating USB | ||
| App Note | Practical USB Terminology | ||
| App Note | USB enumeration code (and more) for the MAX3420E | ||
| App Note | Bringing Up a MAX3420E System | ||
| App Note | The MAX3420E Interrupt System | ||
| App Note | Add USB to Anything | ||
| App Note | MAX3420E Programming Guide | ||
| App Note | Frequently Asked Questions About the MAX3420E | ||
| App Note | MAX3420E Information Card |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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