USB251xB/xBi
USB 2.0 Hi-Speed Hub Controller
PRODUCT FEATURES
General Description
The SMSC USB251xB/xBi hub is a family of low-power,
configurable, MTT (multi transaction translator) hub
controller IC products for embedded USB solutions. The
x
in the part number indicates the number of
downstream ports available, while the
B
indicates
battery charging support. The SMSC hub supports low-
speed, full-speed, and hi-speed (if operating as a hi-
speed hub) downstream devices on all of the enabled
downstream ports.
Datasheet
Features
USB251xB/xBi products are fully footprint compatible
with USB251x/xi/xA/xAi products as direct drop-in
replacements
— Cost savings include using the same PCB components
and application of USB-IF Compliance by Similarity
Highlights
High performance, low-power, small footprint hub
controller IC with 2, 3, or 4 downstream ports
Fully compliant with the
USB 2.0 Specification
[1]
Enhanced OEM configuration options available
through either a single serial I
2
C
®
EEPROM, or
SMBus slave port
MultiTRAK
TM
PortMap
— High-performance multiple transaction translator which
provides one transaction translator per port
— Flexible port mapping and disable sequencing
— Programmable USB differential-pair pin locations ease
PCB design by aligning USB signal lines directly to
connectors
— Programmable USB signal drive strength for recovering
signal integrity using 4-level driving strength resolution
Full power management with individual or ganged
power control of each downstream port
Fully integrated USB termination and pull-up/pull-
down resistors
Supports a single external 3.3 V supply source;
internal regulators provide 1.2 V internal core voltage
Onboard 24 MHz crystal driver or external 24 MHz
clock input
Customizable vendor ID, product ID, and device ID
4 kilovolts of HBM JESD22-A114F ESD protection
(powered and unpowered)
Supports self- or bus-powered operation
Supports the USB Battery Charging specification
Rev. 1.1 for Charging Downstream Ports (CDP)
The USB251xB/xBi offers the following package:
— 36-pin QFN (6x6 mm) lead-free RoHS compliant
package
PortSwap
USB251xBi products support the industrial
temperature range of -40ºC to +85ºC
USB251xB products support the extended
commercial temperature range of 0ºC to +85ºC
PHYBoost
Applications
LCD monitors and TVs
Multi-function USB peripherals
PC motherboards
Set-top boxes, DVD players, DVR/PVR
Printers and scanners
PC media drive bay
Portable hub boxes
Mobile PC docking
Embedded systems
SMSC USB251xB/xBi
Revision 2.2 (02-17-12)
DATASHEET
USB 2.0 Hi-Speed Hub Controller
Datasheet
Order Numbers:
LEAD-FREE
ROHS COMPLIANT
PACKAGE
ORDER NUMBERS
*
USB2512B-AEZG
USB2513B-AEZC
USB2514B-AEZC
USB2512Bi-AEZG
USB2513Bi-AEZG
USB2514Bi-AEZG
PACKAGE
SIZE (MM)
TEMPERATURE
RANGE
0ºC to 85ºC
36-QFN
6x6x0.5
-40ºC to 85ºC
* Add -TR to the end of any QFN order number to order tape and reel (36-pin packages only). Reel size is
3,000 pieces.
This product meets the halogen maximum concentration values per IEC61249-2-21
For RoHS compliance and environmental information, please visit
www.smsc.com/rohs
Please contact your SMSC sales representative for additional documentation related to this product
such as application notes, anomaly sheets, and design guidelines.
Copyright © 2012 SMSC or its subsidiaries. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for
construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC
reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications
before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent
rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated
version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not
designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property
damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of
this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered
trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE
OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL
DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT;
TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD
TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Revision 2.2 (02-17-12)
2
SMSC USB251xB/xBi
DATASHEET
USB 2.0 Hi-Speed Hub Controller
Datasheet
Conventions
Within this manual, the following abbreviations and symbols are used to improve readability.
Example
BIT
FIELD.BIT
Description
Name of a single bit within a field
Name of a single bit (BIT) in FIELD
Range from x to y, inclusive
Groups of bits from m to n, inclusive
Pin Name
Binary number (value zzzz)
Hexadecimal number (value zzz)
Hexadecimal number (value zz)
Reserved memory location. Must write 0, read value indeterminate
Instruction code, or API function or parameter
Section or Document name
Don’t care
<> indicate a Parameter is optional or is only used under some conditions
Braces indicate Parameter(s) that repeat one or more times
Brackets indicate a nested Parameter. This Parameter is not real and actually decodes
into one or more real parameters.
x…y
BITS[m:n]
PIN
zzzzb
0xzzz
zzh
rsvd
code
Section Name
x
<Parameter>
{,Parameter}
[Parameter]
SMSC USB251xB/xBi
DATASHEET
3
Revision 2.2 (02-17-12)
USB 2.0 Hi-Speed Hub Controller
Datasheet
Table of Contents
Chapter 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.1 Configurable Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 3 Pin Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Pin List (Alphabetical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Pin Descriptions (Grouped by Function) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 Configuring the Strap Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
14
19
22
23
Chapter 4 Battery Charging Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.1 USB Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.1 Special Behavior of PRTPWR Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Battery Charging Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1 Battery Charging enabled via I
2
C EEPROM or SMBus. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Internal Register Set (Common to I
2
C EEPROM and SMBus) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Register 00h: Vendor ID (LSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.2 Register 01h: Vendor ID (MSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.3 Register 02h: Product ID (LSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.4 Register 03h: Product ID (MSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.5 Register 04h: Device ID (LSB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.6 Register 05h: Device ID (MSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.7 Register 06h: CONFIG_BYTE_1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.8 Register 07h: Configuration Data Byte 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.9 Register 08h: Configuration Data Byte 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.10 Register 09h: Non-Removable Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.11 Register 0Ah: Port Disable For Self-Powered Operation. . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.12 Register 0Bh: Port Disable For Bus-Powered Operation. . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.13 Register 0Ch: Max Power For Self-Powered Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.14 Register 0Dh: Max Power For Bus-Powered Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.15 Register 0Eh: Hub Controller Max Current For Self-Powered Operation . . . . . . . . . . . . . .
5.1.16 Register 0Fh: Hub Controller Max Current For Bus-Powered Operation . . . . . . . . . . . . . .
5.1.17 Register 10h: Power-On Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.18 Register 11h: Language ID High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.19 Register 12h: Language ID Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.20 Register 13h: Manufacturer String Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.21 Register 14h: Product String Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.22 Register 15h: Serial String Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.23 Register 16h-53h: Manufacturer String . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.24 Register 54h-91h: Product String . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.25 Register 92h-CFh: Serial String. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.26 Register D0h: Battery Charging Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.27 Register F6h: Boost_Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.28 Register F8h: Boost_4:0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision 2.2 (02-17-12)
4
24
24
25
25
Chapter 5 Initial Interface/Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
27
28
28
29
29
29
29
30
31
32
32
33
33
34
34
34
35
35
35
35
35
36
36
36
36
37
37
37
38
SMSC USB251xB/xBi
DATASHEET
USB 2.0 Hi-Speed Hub Controller
Datasheet
5.1.29 Register FAh: Port Swap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.30 Register FBh: PortMap 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.31 Register FCh: PortMap 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.32 Register FFh: Status/Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
5.2 I C EEPROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 I
2
C Slave Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.2 Protocol Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.3 Pull-Up Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.4 In-Circuit EEPROM Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 SMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.1 SMBus Slave Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.2 Protocol Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.3 Slave Device Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.4 Stretching the SCLK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.5 SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.6 Bus Reset Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3.7 SMBus Alert Response Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Default Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5.1 External Hardware RESET_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.5.2 USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
38
39
40
41
41
41
41
42
42
42
42
42
43
44
44
44
44
44
44
44
48
Chapter 6 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.2 Operating Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.2.1 Package Thermal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Chapter 7 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.1 Oscillator/Crystal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 External Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2.1 SMBus Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2.2 I
2
C EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2.3 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
56
57
57
57
57
Chapter 8 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.1 Tape and Reel Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Appendix A (Acronyms). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Appendix B (References) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Datasheet Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
SMSC USB251xB/xBi
5
Revision 2.2 (02-17-12)
DATASHEET
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