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1/17 features usb 2.0 compliant interface multiple transaction translators (mtt) regulated +3.3v output power individual port and hub activity led indicators individual power enables (lqfp-64) individual overcurrent sensing (lqfp-64) single 5v power input single 12 mhz crystal applications usb port expansion docking stations pos terminals test instrumentation factory automation and process controls industrial applications description the xr224 17 is a usb 2.0 7-port hub using multiple transaction translators (mtt) for highest possible bandwidth capability. the upstream usb interface has an integrated usb 2.0 phy and device controller that is compliant with both hi-speed (480 mbps) and full-speed (12 mbps). the downstream phy supports hi-speed, full-speed and low-speed (1.5 mbps) on each of the 7 downstream ports. individual port activity and overall hub activity indicators provide status outputs to control external leds for each port. an external eeprom may be used with the xr22417 to change selected usb descriptors including the usb vendor and product ids, the number of downstream ports and device serial number. overcurrent protection and power control for each downstream port is available in the lqfp-64 package. the xr22417 operates from a single 5v power input. internal regulators provide a 3.3v output which may be connected to vcc33 power input pins. in turn a second internal regulator provides a 1.8v output from the 3.3v input. this 1.8v output may be connected to vcc18 power input pins. typical application figure 1. typical application xr22417 usb host upstream phy hub controller mtt port routing downstream phy x7 device #1 device #2 . . . device #7 usb 2.0 7-port hub xr 22417 rev1a
2/17 absolute maximum ratings stresses beyond the limits listed below may cause permanent damage to the device. exposure to any absolute maximum rating condition for extended periods may affect device reliability and lifetime. vcc5 supply voltage ...................................... -0.5v to 6.0v vcc33 supply voltage .................................... -0.5v to 4.0v vcc18 supply voltage .................................... -0.5v to 2.5v input voltage (all pins except usbd+, usbdC) ................... -0.3v to 4.0v input voltage (usbd+ and usbdC) ............. -0.3v to 5.75v junction temperature ................................................. 125c operating conditions operating temperature range ........................... 0c to 70c vcc5 supply voltage ........................................ 4.4v to 5.5v vcc33 supply voltage ...................................... 3.0v to 3.6v vcc18 supply voltage .................................. 1.62v to 1.98v electrical characteristics unless otherwise noted: t a = 0c to 70c, vcc5 = 4.4v to 5.5v. symbol conditions min typ max units upstream port speed number of active downstream ports downstream ports device speed power consumption dc supply current i cc high speed suspend 0.6 2.5 ma none 53 ma 1 1x full speed 63 ma 1x high speed 71 ma 2 2x full speed 67 ma 1x full speed, 1x high speed 76 ma 2x high speed 87 ma 7 7x full speed 71 ma 7x high speed 167 ma full speed suspend 0.6 2.5 ma none 38 ma 1 1x full speed 45 ma 7 7x full speed 78 ma xr 22417 rev1a
3/17 13 14 15 16 17 18 19 20 21 22 23 24 dm3 dp3 vcc33 dm2 dp2 dm1 dp1 vcc33 vcc18 xtalin xtalout gnd vcc33 dp6 dm6 dp5 dm5 vcc33 up_dp up_dm vcc18 rext vcc33 1v8_out 36 35 34 33 32 31 30 29 28 27 26 25 led5 led6 led7 test1# test2# test3# vcc33 vbus_sense ext_rst# gnd dp7 dm7 48 47 46 45 44 43 42 41 40 39 38 37 1 2 3 4 5 6 7 8 9 10 11 12 led_ctl test#/sda led1scl led2 led3 vcc18 led4 vcc5 3v3_out gnd dm4 dp4 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 dm4 dp4 gnd dm3 dp3 vcc33 dm2 dp2 gnd dm1 dp1 vcc33 vcc18 xtalin xtalout gnd dp7 dm7 vcc33 dp6 dm6 gnd dp5 dm5 vcc33 up_dp up_dm gnd vcc18 rext vcc33 1v8_out 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 led6 led7 ovc2# pwr2# ovc1# pwr1# ovc5# pwr5# vcc33 ovc6# pwr6# ovc7# pwr7# vbus_sense ext_rst# gnd 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 led5 led_ctl test#/sda led1/scl led2 led3 vcc18 led4 vcc5 3v3_out gnd pwr3# ovc3# pwr4# ovc#4 vcc33 48-pin lqfp 64-pin lqfp electrical characteristics (continued) unless otherwise noted: t a = 0c to 70c, vcc5 = 4.4v to 5.5v. symbol parameter conditions min typ max units non-usb i/o pins v il input low voltage -0.3 0.8 v v ih input high voltage 2.0 5.5 v v ol output low voltage i ol = 4 ma 0.4 v v oh output high voltage i ol = -4 ma 2.4 v i il input low leakage current 10 a i ih input high leakage current 10 a c in input pin capacitance 5 pf usb i/o pins (1) 3.3v regulated power output 3v3_out output voltage max load current 100 ma 3.0 3.3 3.6 v note: 1. see usb 2.0 specification for usb i/o pins dc electrical characteristics. pin configuration, top view xr 22417 rev1a
4/17 pin functions lqfp-48 pin number lqfp-64 pin number pin name type description 48 1 led5 o port 5 led indicator. may be used in conjunction with led_ctl pin. 1 2 led_ctl o led hub active indicator. may be used in conjunction with port status leds. 2 3 test#/sda i/o od test mode enable. active low and i 2 c serial data. leave unconnected for normal device operation if no external eeprom is used. 3 4 led1/scl i/o od port 1 led indicator and i 2 c serial clock. may be used in conjunction with led_ctl pin. 4 5 led2 o port 2 led indicator. may be used in conjunction with led_ctl pin. 5 6 led3 o port 3 led indicator. may be used in conjunction with led_ctl pin. 6 7 vcc18 pwr 1.8v power input. 7 8 led4 o port 4 led indicator. may be used in conjunction with led_ctl pin. 8 9 vcc5 pwr 5v power input. 9 10 3v3_out pwr 3.3v power output from internal 5v to 3.3v regulator. must be decoupled with minimum of 10 f. 10 11 gnd pwr ground. - 12 pwr3# od power enable for port 3 downstream device, active low. asserted if ovc3# input is asserted or device is not configured. - 13 ovc3# i downstream port 3 over current indicator, active low. - 14 pwr4# od power enable for port 4 downstream device, active low. asserted if ovc4# input is asserted or device is not configured. - 15 ovc4# i downstream port 4 overcurrent indicator, active low. 15 16 vcc33 pwr 3.3v power input. 11 17 dm4 i/o downstream port 4 usbd- data. 12 18 dp4 i/o downstream port 4 usbd+ data. - 19 gnd pwr ground. 13 20 dm3 i/o downstream port 3 usbd- data. 14 21 dp3 i/o downstream port 3 usbd+ data. - 22 vcc33 pwr 3.3v power input. 16 23 dm2 i/o downstream port 2 usbd- data. 17 24 dp2 i/o downstream port 2 usbd+ data. - 25 gnd pwr ground. 18 26 dm1 i/o downstream port 1 usbd- data. 19 27 dp1 i/o downstream port 1 usbd+ data. 20 28 vcc33 pwr 3.3v power input. 21 29 vcc18 pwr 1.8v power input. 22 30 xtalin i 12 mhz 50 ppm crystal input with load capacitance rating of 16-20 pf. 23 31 xtalout o 12 mhz crystal feedback output. note: type: i = input, o = output, i/o = input/output, pwr = power, od = open-drain. xr 22417 rev1a
5/17 pin functions (continued) lqfp-48 pin number lqfp-64 pin number pin name type description 24 32 gnd pwr ground. 25 33 1v8_out pwr 1.8v power output from internal 3.3v to 1.8v regulator. must be decoupled with minimum of 10 f. 26 34 vcc33 pwr 3.3v power input. 27 35 rext i external bias resistor. connect 2.7k 1% resistor from this pin to gnd. 28 36 vcc18 pwr 1.8v power input. - 37 gnd pwr ground. 29 38 up_dm i/o upstream port usbd- data. 30 39 up_dp i/o upstream port usbd+ data. 31 40 vcc33 pwr 3.3v power input. 32 41 dm5 i/o downstream port 5 usbd- data. 33 42 dp5 i/o downstream port 5 usbd+ data. - 43 gnd pwr ground. 34 44 dm6 i/o downstream port 6 usbd- data. 35 45 dp6 i/o downstream port 6 usbd+ data. 36 46 vcc33 pwr 3.3v power input. 37 47 dm7 i/o downstream port 7 usbd- data. 38 48 dp7 i/o downstream port 7 usbd+ data. 39 49 gnd pwr ground. 40 50 ext_rst# i external reset input, active low. must be asserted for a minimum of 10 s. this pin requires an external pull-up resistor to 3.3v. 41 51 vbus_sense i active high, indicates connection to usb host. must connect to vbus power input from usb host through a series 10k? resistor. a 100k? pull-down resistor and 100nf shunt capacitance are also required on this pin. - 52 pwr7# od power enable for port 7 downstream device, active low. asserted if ovc7# input is asserted or device is not configured. - 53 ovc7# i downstream port 7 over current indicator, active low. - 54 pwr6# od power enable for port 6 downstream device, active low. asserted if ovc6# input is asserted or device is not configured. - 55 ovc6# i downstream port 7 over current indicator, active low. 42 56 vcc33 pwr 3.3v power input. - 57 pwr5# od power enable for port 5 downstream device. asserted if ovc5# input is asserted or device is not configured. note: type: i = input, o = output, i/o = input/output, pwr = power, od = open-drain. xr 22417 rev1a
6/17 pin functions (continued) lqfp-48 pin number lqfp-64 pin number pin name type description - 58 ovc5# i downstream port 5 over current indicator, active low. - 59 pwr1# od power enable for port 1 downstream device. asserted if ovc1# input is asserted or device is not configured. - 60 ovc1# i downstream port 1 over current indicator, active low. - 61 pwr2# od power enable for port 2 downstream device, active low. - 62 ovc2# i downstream port 2 over current indicator, active low. 43 - test1# i test input. use pull-up resistor to 3.3v for normal operation. 44 - test2# o test output. leave unconnected. 45 - test3# i test input. use pull-up resistor to 3.3v for normal operation. 46 63 led7 o port 7 led indicator. may be used in conjunction with led_ctl pin. 47 64 led6 o port 6 led indicator. may be used in conjunction with led_ctl pin. note: type: i = input, o = output, i/o = input/output, pwr = power, od = open-drain. xr 22417 rev1a
7/17 figure 2. functional block diagram xr22417 usb host downstream phy #1 device #1 device #2 . . . device #7 downstream phy #2 . . . downstream phy #7 tt #1 port routing switch downstream port controller upstream phy upstream port controller hub controller overcurrent detection power control 3.3v to 1.8v regulator hub activity indicator led controller oscillator pll (x40) port indicators 12 mhz 480 mhz 5v to 3.3v regulator tt #2 . . . tt #7 functional block diagram xr 22417 rev1a
8/17 applications information functional description the xr22417 hub has a multiple transaction translator architecture that provides one transaction translator (tt) for each of the downstream usb ports. the transaction translators allow the usb 2.0 hub to take incoming high speed packets from the usb host on the upstream port and translate these commands, if necessary to full or low speed devices on any of the 7 downstream ports. the mtt architecture allows for higher bandwidth as the 7 individual ports are not constrained by a shared resource. usb interface the hub function of the xr22417 supports one configuration and supports all usb endpoints: control endpoint interrupt-in and interrupt-out endpoints bulk-in and bulk-out endpoints isochronous-in and isochronous-out endpoints the xr22417 may be placed into a low power or suspended state by the usb host. the xr22417 hub may only be utilized in self-powered mode. each of the downstream ports may draw up to 500ma. operating the xr22417 in bus powered mode violates the usb specification, as the device reports as self-powered in usb descriptors. a bus powered hub must provide 100ma on each downstream port but a 7-port hub cannot since it can only draw 500ma maximum from the usb host. usb vendor id exars usb vendor id is 0x04e2. usb product id exars usb hub product id is 0x0417. device reset the xr22417 has both an automatic power-up reset and an external hardware pin reset. strapping options selected by tying pins to logic 0 or logic 1 states are sampled at either reset and the resulting hardware configuration selected by the strapping is then set. refer to tables 2 and table 3 . xr 22417 rev1a
9/17 applications information (continued) external eeprom an external i 2 c eeprom may be used with the xr22417 to configure usb device descriptors, the number of downstream ports, a device serial number, and downstream non-removable devices. the contents of the eeprom are described in table 1. in order for contents of the eeprom to be used by the xr22417, both the eeprom check values at address 0x00, 0x01 and the checksum at address 0x1f must be correct. if either field is incorrect, the eeprom contents will be ignored and the device will use the default descriptor values. note that using the eeprom requires the use of serial numbers. by usb specification, if the hub is serialized, each individual device must be guaranteed to have a unique serial number. table 1: eeprom contents address content description 0x00 0x40 eeprom check value. 0x01 0x1a eeprom check value. 0x02 vendor id, lsb idvendor field lsb of device descriptor. 0x03 vendor id, msb idvendor field msb of device descriptor. 0x04 product id, lsb idproduct field lsb of device descriptor. 0x05 product id, msb idproduct field msb of device descriptor. 0x06 device release, lsb bcddevice field lsb of device descriptor in binary coded decimal format. 0x07 device release, msb bcddevice field msb of device descriptor in binary coded decimal format. 0x08 to 0x17 device serial number ascii alpha-numeric serial number with maximum length 16 characters. first character of serial number string in location 0x08. 0x18 serial number length length of device serial number. 0x19 0x00 reserved. 0x1a downstream ports number of downstream ports in the bnbrports field of the hub descriptor. eeprom value will take precedence over any strapping options from table 2 and table 3 . 0x1b 0x00 reserved. 0x1c device removable device removable field of hub descriptor. bit n = 0 indicates a removable device, or bit n = 1 indicates a non-removable device for port n, (n = port 1 - 7). bit 0 is reserved. eeprom value will take precedence over any strapping options from table 2 and table 3 . 0x1d 0x00 reserved. 0x1e device attributes bit 0: port indicators support, bit 7 of whubcharacteristics field of hub descriptor - 0: port indicators are not supported on its downstream facing ports and port_ indicator request has no effect. 1: port indicators are supported on its downstream facing ports and port _indicator request controls the indicators. bit 1: identifies a compound device, bit 2 of whubcharacteristics field of hub descriptor - 0: hub is not part of a compound device. 1: hub is part of a compound device. bit 2: maximum current requirements of the hub controller electronics, bhubcontrcurrent field of hub descriptor - 0: 200 ma. 1: 500 ma. bit 3 to 7, reserved, must be 0s. 0x1f checksum bitwise checksum of eeprom values from address 0x00 to 0x1e. xr 22417 rev1a
10/17 applications information (continued) configurations for reduced downstream ports the number of usable downstream ports of the xr22417 may be configured using an external eeprom. additionally, the number of usable downstream ports may be reduced from 7 down to a minimum of 4 by strapping options on the device, shown in table 2. both the eeprom values and the strapping options will change the bnbrports field of the hub descriptor reported to the usb host. led pins for unusable downstream ports are disabled. table 2: strapping options for reducing usable downstream ports usable downstream ports led7 led6 4, 3, 2, 1 logic 0 logic 0 5, 4, 3, 2, 1 normal logic 0 6, 5, 4, 3, 2, 1 logic 0 normal 7, 6, 5, 4, 3, 2, 1 normal normal configurations for non-removable devices non-removable devices are reported in the device removable field of the hub descriptor. they can be identified by strapping options. led pins for non-removable downstream ports are disabled. table 3: strapping options for configuring non-removable downstream ports non-removable downstream ports led4 led3 led2 none normal normal normal 2 normal normal logic 0 3, 2 normal logic 0 normal 3, 2, 1 normal logic 0 logic 0 4, 3, 2, 1 logic 0 normal normal 5, 4, 3, 2, 1 logic 0 normal logic 0 6, 5, 4, 3, 2, 1 logic 0 logic 0 normal 7, 6, 5, 4, 3, 2, 1 logic 0 logic 0 logic 0 xr 22417 rev1a
11/17 applications information (continued) port status indicators seven port indicator (led1 - led7) pins, provide status of downstream devices. ports using led indicators may configure status leds in a number of configurations in conjunction with the led_ctl pin. per the usb 2.0 spec, amber and green leds are used to indicate port status automatically controlled by the usb hub. when the hub is suspended or not yet configured the leds must be off, solid green indicates normal operation, and amber or flashing green and/or amber indicate various error conditions as defined in the specification. the test#/sda and led1/scl pins may also be connected to an external eeprom. test#/sda led1/scl led2 led3 led4 led5 led6 led7 led_ctl xr22417 green amber green amber green amber green amber green amber green amber green amber 470 hub active indicator (optional) red a2 a1 a0 sda scl eeprom figure 3. port and hub status indicators xr 22417 rev1a
12/17 applications information (continued) in the following example, led3 is tied to logic 0 indicating that port 2 and 3 are connected to non-removable devices. led6 is also connected to logic 0 indicating there are 5 usable ports, ports 1-5. led2 and led7 are unneeded and left floating. ports 1, 4 and 5 may be used for removable devices. test#/sda led1/scl led2 led3 led4 led5 led6 led7 led_ctl xr22417 green amber green amber green amber 470 hub active indicator (optional) red a2 a1 a0 sda scl eeprom figure 4. port indicators example xr 22417 rev1a
13/17 applications information (continued) power control and overcurrent protection in the lqfp-64 package, the xr22417 ovcn# pins monitor overcurrent conditions for each port and individual pwrn# pins enable power to devices connected to each downstream port. figure 5 depicts downstream ports 1-4 using individual power and overcurrent protection. note: ports 5-7 are unused in this example. if used can duplicate the monitor and control using the xrp2528. ovc1# ovc2# ovc3# ovc4# ovc5# ovc6# ovc7# pwr1# pwr2# pwr3# pwr4# pwr5# pwr6# pwr7# xr22417 3.3v ena flga flgb enb rseta outa in gnd outb rsetb xrp2528 ena flga flgb enb rseta outa in gnd outb rsetb xrp2528 to vbus of port 1 to vbus of port 3 to vbus of port 4 to vbus of port 2 5v figure 5. lqfp-64 individual power control and overcurrent mode usb hub drivers all operating systems provide a native usb hub device driver for the xr22417 device to operate. no other device drivers are necessary for the xr22417. regulated 3.3v power output the xr22417 internal voltage regulator provides 3.3 vdc output power from 5v input, which can be utilized by other circuitry. refer to electrical characteristics on page 2 for maximum power capability. xr 22417 rev1a
14/17 applications information (continued) external crystal a 12 mhz 50 ppm fundamental frequency external crystal must be connected between the xtalin and xtalout pins of the xr22417 device. the crystal should have a rated load capacitance of 16-20pf. however, note that both the load capacitors and feedback resistance are internal to the xr22417 device as shown. y1 figure 6. typical oscillator connections xr 22417 rev1a
15/17 - c on tr ol di m en si on s a re i n m illi m eters - jed ec m s 026 d r a w ing n o . : p od - 00000096 r e v is ion : a s ide v ie w to p v ie w typ i ca l r e com me nde d l and pa tte r n te r minal dime ns io n de tail a package description lqfp-48 xr 22417 rev1a
16/17 1. co n t r o l d ime n s io n s ar e in m i l li m e t e r s 2. di m en s io n s and t o ler an ce per j edec m s - 026 d r a w ing n o . : p od - 00000092 r e v is ion : a side vie w t o p view t yp i ca l recomme nde d lan d pa tte rn termi na l di m e nsion de t ail a package description (continued) lqfp-64 xr 22417 rev1a
www.exar.com 17/17 tel.: +1 (510) 668-7000 fax: +1 (510) 668-7001 email: uarttechsupport@exar.com ordering information (1) part number operating temperature range lead-free package packaging method xr22417cv48-f 0c to 70c yes (2) 48-pin lqfp tray xr22417cv48tr-f reel xr22417cv64-f 64-pin lqfp tray XR22417CV48EVB evaluation board for lqfp-48 xr22417cv64evb evaluation board for lqfp-64 note: 1. refer to www.exar.com /xr22417 for most up-to-date ordering information. 2. visit www.exar.com for additional information on environmental rating. revision history revision date description 1a aug 2016 initial release xr 22417 exar corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. exar corporation conveys no license under any patent or other right and makes no representation that the circuits are free of patent infringement. while the information in this publication has been carefully checked, no responsibility, however, is assumed for inaccuracies. exar corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. products are not authorized for use in such applications unless exar corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of exar corporation is adequately protected under the circumstances. reproduction, in part or whole, without the prior written consent of exar corporation is prohibited. exar, xr and the xr logo are registered trademarks of exar corporation. all other trademarks are the property of their respective owners. ?2016 exar corporation xr22417_ds_082916 rev1a 48760 kato road fremont, ca 94538 usa

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