MAX3421EEHJ+T Electronic IC Chip In Electronics USB Peripheral / Host Controller

USB Peripheral/Host Controller with SPI Interface

General Description

The MAX3421E USB peripheral/host controller contains the digital logic and analog circuitry necessary to implement a full-speed USB peripheral or a full-/lowspeed host compliant to USB specification rev 2.0. A built-in 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 MAX3421E 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 peripheral or host functionality using the simple 3- or 4-wire SPI interface.

The MAX3421E makes the vast collection of USB peripherals available to any microprocessor, ASIC, or DSP when it operates as a USB host. For point-to-point solutions, for example, a USB keyboard or mouse interfaced to an embedded system, the firmware that operates the MAX3421E can be simple since only a targeted device is supported.

Internal level translators allow the SPI interface to run at a system voltage between 1.4V and 3.6V. USB-timed operations are done inside the MAX3421E with interrupts provided at completion so an SPI master does not need timers to meet USB timing requirements. The MAX3421E includes eight 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 MAX3421E operates over the extended -40°C to +85°C temperature range and is available in a 32-pin TQFP package (5mm x 5mm) and a 32-pin TQFN package (5mm x 5mm).

Applications

Embedded Systems

Medical Devices

Microprocessors and DSPs

Custom USB Devices

Cameras

Desktop Routers

PLCs

Set-Top Boxes

PDAs

MP3 Players

Instrumentation

Features

♦ Microprocessor-Independent USB Solution

♦ Software Compatible with the MAX3420E USB Peripheral Controller with SPI Interface

♦ Complies with USB Specification Revision 2.0 (Full-Speed 12Mbps Peripheral, Full-/Low-Speed 12Mbps/1.5Mbps Host)

♦ Integrated USB Transceiver

♦ Firmware/Hardware Control of an Internal D+ Pullup Resistor (Peripheral Mode) and D+/DPulldown Resistors (Host Mode)

♦ Programmable 3- or 4-Wire, 26MHz SPI Interface

♦ Level Translators and VL Input Allow Independent System Interface Voltage

♦ Internal Comparator Detects VBUS for SelfPowered Peripheral Applications

♦ ESD Protection on D+, D-, and VBCOMP

♦ Interrupt Output Pin (Level- or ProgrammableEdge) Allows Polled or Interrupt-Driven SPI Interface

♦ Eight General-Purpose Inputs and Eight GeneralPurpose Outputs

♦ Interrupt Signal for General-Purpose Input Pins, Programmable Edge Polarity

♦ Intelligent USB SIE

♦ Automatically Handles USB Flow Control and Double Buffering

♦ Handles Low-Level USB Signaling Details

♦ Contains Timers for USB Time-Sensitive Operations so SPI Master Does Not Need to Time Events

♦ Space-Saving Lead-Free TQFP and TQFN Packages (5mm x 5mm)

ABSOLUTE MAXIMUM RATINGS

(All voltages referenced to GND, unless otherwise noted.)

V_CC ......................................................................... -0.3V to +4V

V_L .............................................................................-0.3V to +4V

VBCOMP .................................................................-0.3V to +6V

D+, D-, XI, XO ............................................-0.3V to (V_CC + 0.3V)

SCLK, MOSI, MISO, SS, RES, GPOUT7–GPOUT0,

GPIN7–GPIN0, GPX, INT ..........................-0.3V to (V_L + 0.3V)

Continuous Power Dissipation (TA = +70°C)

32-Pin TQFN (derate 21.3mW/°C above +70°C) .......1702mW

32-Pin TQFP (derate 13.1mW/°C above +70°C)........1047mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Pin Configurations

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