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SMSC USB2503 Datasheet

Integrated usb 3.0 compartible 3-port hub
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PRODUCT FEATURES

Integrated USB 2.0 Compatible 3-Port Hub
— 3 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 USB 2.0 Transceivers
VID/PID/DID, and Port Configuration for Hub via:
2
— Single Serial I
C 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
SMSC USB2503/USB2503A
USB2503/
USB2503A
Integrated USB 2.0
Compatible 3-Port Hub
On-Board 24MHz Crystal Driver Circuit or 24 MHz
external clock driver
Internal PLL for 480MHz USB 2.0 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
48 Pin QFN lead-free RoHS compliant package
DATASHEET
Datasheet
Revision 2.3 (08-27-07)

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Summary of Contents for SMSC USB2503

  • Page 1: Product Features

    — 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 SMSC USB2503/USB2503A USB2503/ USB2503A Integrated USB 2.0 Compatible 3-Port Hub On-Board 24MHz Crystal Driver Circuit or 24 MHz external clock driver Internal PLL for 480MHz USB 2.0 Sampling...

  • Page 2: Order Numbers

    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.

  • Page 3: Table Of Contents

    Chapter 9 Package Outline ........... 43 SMSC USB2503/USB2503A DATASHEET Revision 2.3 (08-27-07)
  • Page 4 Figure 9.1 48 Pin QFN Package Outline (7x7 mm body - 0.5 mm pitch) ......43 Revision 2.3 (08-27-07) SMSC USB2503/USB2503A DATASHEET...
  • Page 5 Table 9.1 48 Pin QFN Package Parameters ..........43 SMSC USB2503/USB2503A Revision 2.3 (08-27-07)

  • Page 6: Chapter 1 General Description

    Chapter 1 General Description The SMSC 3-Port Hub is fully compliant with the USB 2.0 Specification and will attach to a USB host as a Full-Speed Hub or as a Full-/High-Speed Hub. The 3-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.

  • Page 7: Chapter 2 Pin Table 3-Port

    GR3/ PRTPWR1 PRT_DIS0 PRTPWR_POL OCS1_N GANG_EN RBIAS SDA/SMBDATA SCL/SMB- CLK/CFG_SEL0 XTAL1/CLKIN XTAL2 TEST1 TEST0 SMSC USB2503/USB2503A Table 2.1 3-Port Pin Table VBUS_DET 3-PORT USB INTERFACE (18-PINS) USBDP2 GR1/ NON_REM0 PRTPWR2 OCS2_N SERIAL PORT (3-PINS) CFG_SEL1 MISC (8-PINS) RESET_N ATEST/ REG_EN POWER &...

  • Page 8: Chapter 3 Pin Configuration 3-Port Hub

    SMSC USB2503 & USB2503A (Top View QFN-48) Thermal Slug (must be connected to VSS) Figure 3.1 3-Port 48-Pin QFN DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet TEST0 VDD18 GR1/NON_REM0 GANG_EN GR2/NON_REM1 PRTPWR_POL GR3/PRT_DIS0 PRTPWR2 OCS3_N PRTPWER3 VDDA33 SMSC USB2503/USB2503A...

  • Page 9: Chapter 4 3-Port Hub Block Diagram

    Repeater Downstream PHY #1 Downstream USB Data Sense NAME SYMBOL USB Bus Data USBDN0 USBDP0 Detect Upstream VBUS_DET VBUS Power SMSC USB2503/USB2503A 24 MHz 1.8V Strapping 3.3V Crystal Options 1.8V Reg. Routing Logic Port #1 OC Sense Downstream Switch Driver...
  • Page 10 RESET_N negation to determine if downstream port power switching and current sensing are ganged, or individual port-by-port. ‘0’ = Port-by-port sensing & switching. ‘1’ = Ganged sensing & switching. DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet FUNCTION SMSC USB2503/USB2503A...

  • Page 11: Table 4.2 Smbus Or Eeprom Interface Behavior

    SYMBOL Crystal XTAL1/ Input/External CLKIN Clock Input SMSC USB2503/USB2503A TYPE I/O12 Port Power Polarity strapping determination for the active signal polarity of the PRTPWR[3:1] pins. While RESET_N is asserted, the logic state of this pin will (though the use of internal combinatorial logic) determine...

  • Page 12: Table 4.4 Power, Ground, And No Connect

    +3.3V Filtered analog power for the internal PLL If the internal PLL 1.8V regulator is enabled, then this pin acts as the regulator input +3.3V Filtered analog power. DATASHEET Datasheet FUNCTION for more details on FUNCTION μ F (or greater) Ω) capacitor SMSC USB2503/USB2503A...

  • Page 13: Table 4.5 Buffer Type Descriptions

    Defined in USB Specification. Note: Meets USB 1.1 requirements when operating as a 1.1-compliant device and meets USB 2.0 requirements when operating as a 2.0-compliant device. Analog Input/output. Per PHY test requirements. SMSC USB2503/USB2503A TYPE +3.3V I/O and Core power. Ground.

  • Page 14: Chapter 5 Functional Block Description

    5.1.1 Hub Configuration Options The SMSC Hub supports a large number of features and must be configured in order to correctly function when attached to a USB host controller. There are three principal ways to configure the hub: SMBus, EEPROM, or by internal default settings. In all cases, the configuration method will be determined by the CFG_SEL1 and CFG_SEL0 pins immediately after RESET_N negation.
  • Page 15 5.1.1.12 Non-Removable Device Informs the Host if one of the active ports has a permanent device that is undetachable from the Hub. (Note: The device must provide its own descriptor data.) SMSC USB2503/USB2503A DATASHEET Revision 2.3 (08-27-07)
  • Page 16 Self-Powered if the local power source is restored). {Note: If the local power source is available, the 3-port Hub will always switch to Self-Powered operation.} When Dynamic Power switching is enabled, the Hub detects the availability of a local power source by monitoring the external SELF_PWR pin.

  • Page 17: Vbus Detect

    Powered), Hub will remove power from the D+ or D- pull-up resistor within 10 seconds. EEPROM Interface The SMSC Hub can be configured via a 2-wire (I2C) EEPROM. (Please see Figure 4.1, "3-Port Hub Pin Descriptions" for specific details on how to enable the I2C EEPROM option).

  • Page 18: In-Circuit Eeprom Programming

    2mA units). Max Current for this configuration (expressed in 2mA units). Max Current (expressed in 2mA units). Max Current (expressed in 2mA units). Time until power is stable. DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet DESCRIPTION SMSC USB2503/USB2503A...
  • Page 19 EEPROM Offset 6(h) - CONFIG_BYTE_1 NUMBER BIT NAME SELF_BUS_PWR PORT_IND HS_DISABLE MTT_ENABLE SMSC USB2503/USB2503A DESCRIPTION Most Significant Byte of the Vendor ID. Least Significant Byte of the Vendor ID. DESCRIPTION Most Significant Byte of the Product ID. Least Significant Byte of the Product ID.
  • Page 20 10 = 4ms 11 = 6ms Compound Device: Designates if Hub is part of a compound device. 0 = No. (Default) 1 = Yes, Hub is part of a compound device. Reserved. DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet SMSC USB2503/USB2503A...
  • Page 21 5.2.3.8 EEPROM Offset A(h) - Port Disable For Bus Powered Operation NUMBER BIT NAME PORT_DIS_BP SMSC USB2503/USB2503A DESCRIPTION Non-Removable Device: Indicates which port(s) include non-removable devic- es. ‘0’ = port is removable, ‘1’ = port is non-removable. Bit 7= Reserved...
  • Page 22 Note: The USB 2.0 Specification does not permit this value to exceed 100mA A value of 50 (decimal) indicates 100mA, which is the default value. DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet SMSC USB2503/USB2503A...

  • Page 23: Smbus Slave Interface

    SMBus interface, external EEPROM support is no longer available (and the user-defined descriptor data must be downloaded via the SMBus). Due to system issues, the SMSC Hub waits indefinitely for the SMBus code load to complete and only “appears” as a newly connected device on USB after the code load is complete.

  • Page 24: Invalid Protocol Response Behavior

    Only one byte is transferred at a time for a Read Table 5.3 SMBus Read Byte Protocol Reg. Start Slave Addr Addr Section 5.3.3 for the response to undefined registers. DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet Reg. Data Stop Reg. Nack Stop Data SMSC USB2503/USB2503A...

  • Page 25: Slave Device Time-Out

    PID LSB PID MSB DID LSB DID MSB Config Data Byte 1 Config Data Byte 2 Non-Removable Devices Port Disable (Self) Port Disable (Bus) SMSC USB2503/USB2503A TIMEOUT, MAX BIT 7 ABBR (MSB) BIT 6 BIT 5 BIT 4 STCD VIDL...
  • Page 26 {Note: This bit is write once and is only cleared by assertion of the external RESET_N pin.} DESCRIPTION Least Significant Byte of the Vendor ID. DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet BIT 0 BIT 4 BIT 3 BIT 2 BIT 1 (LSB) SMSC USB2503/USB2503A...
  • Page 27 DID_MSB 5.3.9.8 Register 07h: CONFIG_BYTE_1 (Reset = 0x00) NUMBER BIT NAME SELF_BUS_PWR PORT_IND SMSC USB2503/USB2503A DESCRIPTION Most Significant Byte of the Vendor ID. DESCRIPTION Least Significant Byte of the Product ID. DESCRIPTION Most Significant Byte of the Product ID. DESCRIPTION Least Significant Byte of the Device ID.
  • Page 28 10 = 4ms 11 = 6ms Compound Device: Designates if Hub is part of a compound device. 0 = No. 1 = Yes, Hub is part of a compound device. Reserved DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet SMSC USB2503/USB2503A...
  • Page 29 5.3.9.13 Register 0Ch: Max Power For Self Powered Operation (Reset = 0x00) NUMBER BIT NAME SMSC USB2503/USB2503A DESCRIPTION Non-Removable Device: Indicates which port(s) include non-removable devic- es. ‘0’ = port is removable, ‘1’ = port is non-removable. Bit 7= Reserved...
  • Page 30 This value will NOT include the power consumption of a permanently attached peripheral if the hub is configured as a compound device. A value of 50 (decimal) would indicate 100mA, which is the default value. DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet SMSC USB2503/USB2503A...

  • Page 31: Default Configuration Option

    Please refer to Table 5.1 on page 18 selected. Default Strapping Options: The SMSC Hub can be configured via a combination of internal default values and pin strap options. Please see Table 4.1, "3-Port Hub Pin Descriptions" default/pin-strap configuration option.

  • Page 32: Reset

    Once operational, the Hub immediately reads OEM-specific data from the external EEPROM (if the SMBus option is not disabled). Revision 2.3 (08-27-07) Strap High Strap Low Figure 5.1 LED Strapping Option DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet SMSC USB2503/USB2503A...

  • Page 33: Figure 5.2 Reset_N Timing For Default/Strap Option Mode

    When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t1+t5. All Power Supplies must have reached the operating levels mandated in Parameters", prior to (or coincident with) the assertion of RESET_N. SMSC USB2503/USB2503A Drive Strap Attach Outputs to...

  • Page 34: Figure 5.3 Reset_N Timing For Eeprom Mode

    Revision 2.3 (08-27-07) Attach USB Reset recovery Set Options Upstream DATASHEET Integrated USB 2.0 Compatible 3-Port Hub Datasheet Start completion Idle request response UNITS μ sec μ sec 99.5 msec msec msec undefined msec msec Section Chapter 7, "DC SMSC USB2503/USB2503A...

  • Page 35: Reset_N For Smbus Slave Configuration

    Note: The Hub does not propagate the upstream USB reset to downstream devices. 1. Sets default address to 0. 2. Sets configuration to: Unconfigured. 3. Negates PRTPWR[4:1] to all downstream ports. 4. Clears all TT buffers. SMSC USB2503/USB2503A Attach SMBus Code Hub PHY USB Reset...
  • Page 36 6. Complies with Section 11.10 of the USB 2.0 Specification for behavior after completion of the reset sequence. The Host then configures the Hub and the Hub’s downstream port devices in accordance with the USB Specification. Revision 2.3 (08-27-07) SMSC USB2503/USB2503A DATASHEET...

  • Page 37: Chapter 6 Xnor Test

    ATEST/REG_EN, RBIAS, TEST1, Power, and Ground). This functionality is enabled by driving TEST1 and CFG_SEL[1] high, driving SCLK low and transition RESET_N from low to high. The output from the XNOR chain is driven to GR2 . For each pin tested for continuity GR2 should toggle. SMSC USB2503/USB2503A DATASHEET Revision 2.3 (08-27-07)

  • Page 38: Chapter 7 Dc Parameters

    AC power line may appear on the DC output. When this possibility exists, it is suggested that a clamp circuit be used. Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 3-Port Hub UNITS °C °C (3.3V supply voltage + 2) ≤ 6 + 0.3V DD18 DATASHEET Datasheet COMMENTS Soldering < 10 seconds SMSC USB2503/USB2503A...

  • Page 39: Recommended Operating Conditions

    (IPU) Low Input Level High Input Level Low Input Leakage High Input Leakage Input Buffer with Pull-Down Low Input Level High Input Level Low Input Leakage High Input Leakage SMSC USB2503/USB2503A UNITS °C 1.71 1.98 -0.3 -0.3 DDA33 -0.3 DD18 Table 7.1 DC Electrical Characteristics...
  • Page 40 CR = 3.3V DD33 = -4mA @ V CR = 3.3V DD33 = 0 to V DD33 (Note 1) = 12 mA @ V CR = 3.3V DD33 µA = 0 to V DD33 (Note 1) Total from all supplies SMSC USB2503/USB2503A...
  • Page 41 Capacitance Input Capacitance Output Capacitance Power Sequencing There are no power supply sequence restrictions for the Hub. The order in which power supplies power-up and power-down is implementation dependent. SMSC USB2503/USB2503A UNITS = 3.3V DD33CR LIMITS UNIT All pins except USB pins (and pins under...

  • Page 42: Chapter 8 Ac Specifications

    External Clock: 50% Duty cycle ± 10%, 24 MHz ± 100ppm, Jitter < 100 ps rms. 8.1.1 SMBus Interface: The SMSC Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the SMBus 1.0 Specification for Slave-Only devices (except as noted in 8.1.2 I2C EEPROM: Frequency is fixed at 59KHz ±...

  • Page 43: Chapter 9 Package Outline

    Integrated USB 2.0 Compatible 3-Port Hub Datasheet REMARKS Overall Package Height Standoff Mold Thickness X Overall Size X Mold Cap Size X exposed Pad Size Y Overall Size Y Mold Cap Size Y exposed Pad Size Terminal Length Terminal Pitch Terminal Width Coplanarity SMSC USB2503/USB2503A...

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