MAX3420E_15 Datasheet, PDF (1/22 Pages) Maxim Integrated Products – USB Peripheral Controller with SPI Interface

MAX3420E
EVALUATION KIT AVAILABLE
USB Peripheral Controller with SPI Interface
General 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).
Applications
●● Cell Phones
●● PC Peripherals
●● Microprocessors and
DSPs
●● Custom USB Devices
●● Cameras
●● Desktop Routers
●● PLCs
●● Set-Top Boxes
●● PDAs
●● MP3 Players
●● Instrumentation
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX3420EETG+
-40°C to +85°C
24 TQFN-EP*
MAX3420EECJ+
-40°C to +85°C
32 LQFP
MAX3420EECJ/V+ -40°C to +85°C
32 LQFP
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
/V denotes an automotive qualified part.
Benefits and 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 V_BUS 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)
●● SETUP Data Has Its Own 8-Byte FIFO, Simplifying
Firmware
●● ESD Protection on D+, D-, and VBCOMP Improves
System Reliability
19-3781; Rev 5; 11/15