• USB-IF “Hi-Speed” certified to the Universal Serial
Bus Specification Rev 2.0
• Interface compliant with the UTMI+ Specification,
Revision 1.0
• Includes full support for the optional On-The-Go
(OTG) protocol detailed in the On-The-Go Sup-
plement Revision 1.0a specification
• Functional as a host, device or OTG PHY
• Supports HS, FS, and LS data rates
• Supports FS pre-amble for FS hubs with a LS
device attached (UTMI+ Level 3)
• Supports HS SOF and LS keep alive pulse.
• Supports Host Negotiation Protocol (HNP) and
Session Request protocol (SRP)
• Internal comparators support OTG monitoring of
VBUS levels
• Low Latency Hi-Speed Receiver (43 Hi-Speed
clocks Max)
• Internal 1.8 volt regulators allow operation from a
single 3.3 volt supply
• Internal short circuit protection of ID, DP and DM
lines to VBUS or ground
• Integrated 24MHz Crystal Oscillator supports
either crystal operation or 24MHz external clock
input
• Internal PLL for 480MHz Hi-Speed USB operation
• Supports USB 2.0 and legacy USB 1.1 devices
• 55mA Unconfigured Current (typical) - ideal for
bus powered applications
• 83uA suspend current (typical) - ideal for battery
powered applications
• Full Commercial operating temperature range
from 0C to +70C
• 56-Pin, QFN RoHS compliant package
(8 x 8 x 0.90 mm height)
Functional Overview
The USB3500 is a highly integrated USB transceiver
system. It contains a complete USB 2.0 PHY with the
UTMI+ industry standard interface to support fast time
to market for a USB controller. The USB3500 is com-
posed of the functional blocks shown in the figure
below.
USB3500 Block Diagram
m
24 MHz
XTAL
5V
Power
Supply
VBUS
ID
VDD3.3
Rpu_dp
Rpu_dm
VDDA1.8
VDD1.8
VDD3.3
Internal
Regulators
& POR
XTAL &
PLL
XO
XI
OTG
Module
XCVRSEL[1:0]
TERMSEL
TXREADY
SUSPENDN
TXVALID
RESET
CHRGVBUS
RXACTIVE
OPMODE[1:0]
ID_DIG
IDPULLUP
CLKOUT
LINESTATE[1:0]
HOSTDISC
DISCHRGVBUS
SESSEND
DATA[7:0]
RXVALID
SESSVLD
DPPD
DMPD
RXERROR
VBUSVLD
TX
Logic
DP
DM
Mini-AB
USB
Connector
HS XCVR
RX
Logic
Resistors
Bias
Gen.
RBIAS
UTMI+
Digital
FS/LS
XCVR
USB3500
2005 - 2016 Microchip Technology Inc.
Rpd_dm
Rpd_dp
DS00002103A-page 1
USB3500
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and
enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
E-mail at
docerrors@microchip.com.
We welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for cur-
rent devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the
revision of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site;
http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include -literature number) you are
using.
Customer Notification System
Register on our web site at
www.microchip.com
to receive the most current information on all of our products.
DS00002103A-page 2
2005 - 2016 Microchip Technology Inc.
USB3500
Table of Contents
1.0 General Description ........................................................................................................................................................................ 4
2.0 Pin Configuration and Pin Definitions ............................................................................................................................................. 6
Appendix A: Revision History .............................................................................................................................................................. 41
The Microchip Web Site ...................................................................................................................................................................... 42
Customer Change Notification Service ............................................................................................................................................... 42
Customer Support ............................................................................................................................................................................... 42
Product Identification System ............................................................................................................................................................. 43
2005 - 2016 Microchip Technology Inc.
DS00002103A-page 3
USB3500
1.0
GENERAL DESCRIPTION
The USB3500 is a stand-alone Hi-Speed USB Physical Layer Transceiver (PHY). The USB3500 uses a UTMI+ interface
to connect to an SOC or FPGA or custom ASIC. The USB3500 provides a flexible alternative to integrating the analog
PHY block for new designs.
FIGURE 1-1:
BASIC UTMI+ USB DEVICE BLOCK DIAGRAM
SOC/FPGA/ASIC
Including Device Controller
USB3500
V
BUS
Hi-Speed
USB App.
UTMI+
Link
UTMI+
Interface
UTMI+
Digital
Logic
USB 2.0
Analog
w/ OTG
ID
DM
DP
USB
Connector
(Standard
or Mini)
The USB3500 provides a fully compliant USB 2.0 interface, and supports High-Speed (HS), Full-Speed (FS), and Low-
Speed (LS) USB. The USB3500 supports all levels of the UTMI+ specification as shown in
Figure 1-2.
The USB3500 can also, as an option, fully support the On-the-Go (OTG) protocol defined in the On-The-Go Supplement
to the USB 2.0 Specification. On-the-Go allows the Link to dynamically configure the USB3500 as host or peripheral
configured dynamically by software. For example, a cell phone may connect to a computer as a peripheral to exchange
address information or connect to a printer as a host to print pictures. Finally the OTG enabled device can connect to
another OTG enabled device to exchange information. All this is supported using a single low profile Mini-AB USB con-
nector.
Designs not needing OTG can ignore the OTG feature set.
DS00002103A-page 4
2005 - 2016 Microchip Technology Inc.
USB3500
The USB3500 uses Microchip’s advanced proprietary technology to minimize power dissipation, resulting in maximized
battery life in portable applications.
FIGURE 1-2:
UTMI+ LEVEL 3 SUPPORT
UTMI+ Level 3
USB2.0 Peripheral, host controllers, On-the-
Go devices
(HS, FS, LS, preamble packet)
ADDED FEATURES
USB3500
UTMI+ Level 2
USB2.0 Peripheral, host controllers, On-
the-Go devices
(HS, FS, and LS but no preamble packet)
UTMI+ Level 1
USB2.0 Peripheral, host controllers, and
On-the-Go devices
(HS and FS Only)
UTMI+ Level 0
USB2.0 Peripherals Only
USB3280
USB3250
1.1
Applications
The USB3500 is targeted for any application where a hi-speed USB connection is desired.
The USB3500 is well suited for:
•
•
•
•
•
•
•
•
Cell Phones
MP3 Players
Scanners
Printers
External Hard Drives
Still and Video Cameras
Portable Media Players
Entertainment Devices
1.2
•
•
•
•
Reference Documents
Universal Serial Bus Specification, Revision 2.0, April 27, 2000
USB 2.0 Transceiver Macrocell Interface (UTMI) Specification, Version 1.02, May 27, 2000
On-The-Go Supplement to the USB 2.0 Specification, Revision 1.0a, June 24, 2003
UTMI+ Specification, Revision 1.0, February 2, 2004
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