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USB2504/USB2504A
Integrated USB2.0 Compatible 4-Port Hub
PRODUCT FEATURES
Data Brief
Integrated USB2.0 Compatible 4-Port Hub
-- 4 Transaction Translators for highest performance -- High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and Low-Speed (1.5Mbits/s) compatible -- Full power management with per port or ganged, selectable power control -- Detects Bus-Power/Self-Power source and changes mode automatically

Complete USB Specification 2.0 Compatibility
-- Includes USB2.0 Transceivers
VID/PID/DID, and Port Configuration for Hub via:
-- Single Serial I2C EEPROM -- SMBus Slave Port

Default VID/PID/DID, allows functionality when configuration EEPROM is absent Hardware Strapping options allow for configuration without an external EEPROM or SMBus Host
On-Board 24MHz Crystal Driver Circuit or 24 MHz external clock driver Internal PLL for 480MHz USB2.0 Sampling Internal 1.8V Linear Voltage Regulator Integrated USB termination and Pull-up/Pull-down resistors Internal Short Circuit protection of USB differential signal pins 1.8 Volt Low Power Core Operation 3.3 Volt I/O with 5V Input Tolerance 64-Pin TQFP or 56 Pin QFN Package; green, leadfree package also available
SMSC USB2504/USB2504A
PRODUCT PREVIEW
Revision 1.8 (11-11-05)
Integrated USB2.0 Compatible 4-Port Hub
ORDER NUMBER(S):
USB2504/USB2504A-JD FOR 64 PIN TQFP PACKAGE, USB2504/USB2504A-ABZJ FOR 56 PIN QFN PACKAGE AND USB2504/USB2504A-JT FOR 64 PIN TQFP PACKAGE (GREEN, LEAD-FREE)
80 Arkay Drive Hauppauge, NY 11788 (631) 435-6000 FAX (631) 273-3123
Copyright (c) 2005 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 1.8 (11-11-05)
PRODUCT PREVIEW
2
SMSC USB2504/USB2504A
Integrated USB2.0 Compatible 4-Port Hub
General Description
The SMSC 4-Port Hub is fully compliant with the USB2.0 Specification and will attach to a USB host as a Full-Speed Hub or as a Full-/High-Speed Hub. The 4-Port Hub supports Low-Speed, Full-Speed, and High-Speed (if operating as a High-Speed Hub) downstream devices on all of the enabled downstream ports. A dedicated Transaction Translator (TT) is available for each downstream facing port. This architecture ensures maximum USB throughput for each connected device when operating with mixed-speed peripherals. The Hub works with an external USB power distribution switch device to control VBUS switching to downstream ports, and to limit current and sense over-current conditions. All required resistors on the USB ports are integrated into the Hub. This includes all series termination resistors on D+ and D- pins and all required pull-down and pull-up resistors on D+ and D- pins. The over-current sense inputs for the downstream facing ports have internal pull-up resistors. Throughout this document the upstream facing port of the hub will be referred to as the upstream port, and the downstream facing ports will be called the downstream ports.
OEM Selectable Features
A default configuration is available in the USB2504/USB2504A following a reset. This configuration may be sufficient for some applications. Strapping option pins make it possible to modify a limited subset of the configuration options. The USB2504/USB2504A may also be configured by an external EEPROM or a microcontroller. When using the microcontroller interface, the Hub appears as an SMBus slave device. If the Hub is pinstrapped for external EEPROM configuration but no external EEPROM is present, then a value of `0' will be written to all configuration data bit fields (the hub will attach to the host with all `0' values). The 4-Port Hub supports several OEM selectable features:

Operation as a Self-Powered USB Hub or as a Bus-Powered USB Hub. Operation as a Dynamic-Powered Hub (Hub operates as a Bus-Powered device if a local power source is not available and switches to Self-Powered operation when a local power source is available). Multiple Transaction Translator (Multi-TT) or Single-TT support. Optional OEM configuration via I2C EEPROM or via the industry standard SMBus interface from an external SMBus Host. Port power switching on an individual or ganged basis. Port over-current monitoring on an individual or ganged basis. LED indicator support. Compound device support (port is permanently hardwired to a downstream USB peripheral device). Hardware strapping options enable configuration of the following features. Non-Removable Ports Port Power Polarity (active high or active low logic) Port Disable LED support MTT enable Ganged Vs Port power switching and over-current sensing

SMSC USB2504/USB2504A
PRODUCT PREVIEW
3
Revision 1.8 (11-11-05)
Integrated USB2.0 Compatible 4-Port Hub
Block Diagram
Upstream Upstream 24 MHz USB Data VBUS Crystal
3.3V
To EEPROM Pin 1.8V Strapping or SMBus Master Cap Options SD SCL
Upstream PHY
VBUS Power Detect
PLL
1.8V Reg.
Internal Defaults Select
Serial Interface
Repeater
SIE
Controller
TT #1
TT #2
TT #3
TT #4
Port Controller
Routing Logic
Port #1 OC Sense Downstream Switch Driver PHY #1 LED Drivers
...
Port #4 OC Sense Downstream Switch Driver PHY #4 LED Drivers
Downstream OC Switch/LED USB Data Sense Drivers
Downstream OC Switch/LED USB Data Sense Drivers
Figure 1 4-Port Block Diagram
Revision 1.8 (11-11-05)
PRODUCT PREVIEW
4
SMSC USB2504/USB2504A
Integrated USB2.0 Compatible 4-Port Hub
Package Outlines
Figure 2 64 Pin TQFP Package Outline (10x10x1.4 mm body - 2 mm footprint) Table 1 64 Pin TQFP Package Parameters MIN A A1 A2 D D1 E E1 H L L1 e q W R1 R2 ccc ~ 0.05 1.35 11.80 9.80 11.80 9.80 0.09 0.45 ~ 0o 0.17 0.08 0.08 ~ NOMINAL ~ ~ ~ ~ ~ ~ ~ ~ 0.60 1.00 0.50 Basic ~ 0.22 ~ ~ ~ MAX 1.60 0.15 1.45 12.20 10.20 12.20 10.20 0.20 0.75 ~ 7o 0.27 ~ 0.20 0.08 REMARKS Overall Package Height Standoff Body Thickness X Span X body Size Y Span Y body Size Lead Frame Thickness Lead Foot Length Lead Length Lead Pitch Lead Foot Angle Lead Width Lead Shoulder Radius Lead Foot Radius Coplanarity
Notes: 1. Controlling Unit: millimeter. 2. Tolerance on the true position of the leads is 0.04 mm maximum. 3. Package body dimensions D1 and E1 do not include the mold protrusion. Maximum mold protrusion is 0.25 mm per side. 4. Dimension for foot length L measured at the gauge plane 0.25 mm above the seating plane. 5. Details of pin 1 identifier are optional but must be located within the zone indicated.
SMSC USB2504/USB2504A
PRODUCT PREVIEW
5
Revision 1.8 (11-11-05)
REVISION HISTORY
REVISION DESCRIPTION INITIAL RELEASE REMOVE "PRELIMINARY" NOTE L(MAX) FROM 0.55 TO 0.50. ADDED D2/E2 VARIATIONS TABLE DATE 2/07/04 10/7/04 7/2/05 RELEASED BY S.K.ILIEV S.K.ILIEV S.K.ILIEV
D D1 e
D2 TERMINAL #1 IDENTIFIER AREA (D/2 X E/2) 3
A B C
3 TERMINAL #1 IDENTIFIER AREA (D1/2 X E1/2) E1 E E2 2
EXPOSED PAD
56X L
4X 45X0.6 MAX (OPTIONAL)
56X b 2
TOP VIEW
BOTTOM VIEW
A A1
A2
SIDE VIEW
D2 / E2 VARIATIONS CATALOG PART
NOTES: 1. ALL DIMENSIONS ARE IN MILLIMETER. 2. POSITION TOLERANCE OF EACH TERMINAL AND EXPOSED PAD IS 0.05mm AT MAXIMUM MATERIAL CONDITION. DIMENSIONS "b" APPLIES TO PLATED TERMINALS AND IT IS MEASURED BETWEEN 0.15 AND 0.30 mm FROM THE TERMINAL TIP. 3. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL BUT MUST BE LOCATED WITHIN THE AREA INDICATED.
UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN MILLIMETERS AND TOLERANCES ARE: DECIMAL 0.1 X.X X.XX 0.05 X.XXX 0.025 ANGULAR 1
THIRD ANGLE PROJECTION
80 ARKAY DRIVE HAUPPAUGE, NY 11788 USA
TITLE
DIM AND TOL PER ASME Y14.5M - 1994
MATERIAL
NAME
DRAWN
DATE
3-D VIEWS
FINISH
-
S.K.ILIEV
CHECKED
2/06/04 2/07/04
PACKAGE OUTLINE 56 TERMINAL QFN, 8x8mm BODY, 0.5mm PITCH
DWG NUMBER
S.K.ILIEV
APPROVED
MO-56-QFN-8x8
STD COMPLIANCE SHEET
REV
C 1 OF 1
PRINT WITH "SCALE TO FIT" DO NOT SCALE DRAWING
SCALE
S.K.ILIEV
2/07/04
1:1
JEDEC: MO-220
Figure 3 56 Pin QFN Package and Parameters
SMSC USB2504/USB2504A
PRODUCT PREVIEW
6
Revision 1.8 (11-11-05)

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