# # LED Series Resistor Components # # Key In Components File for the Hub Module # -------------------------------------------- # # Original Rev. 24-Apr-2015 # Most Recent Rev. 5-Jul-2016 # # # This Comps file holds the LED Series Resistors. # # - Typically these series resistors are between the LED's # Cathode and the Driver for that LED. # # - Sometimes these resistors are between the LED Anode and # the supply voltage for that LED, e.g. Iso_12V LED. # # - The Blue LEDs run from a +5V supply # # - The LEDs that are driven directly by the IPMC # mezzanine are driven by their anodes. The series # resistors for these 4 LEDs go between their # cathodes and ground. # # # Note that the LED that indicates that the # Isoltaed +12V supply is enabled and running # also needs a special series resistor so that # it can operate from +12V. # # # The Reference Designators for the LED series resistors # are 200 greater then the reference designator for the LED, # LE1 uses series resistor R201. # # # # Notes: # # The series resistors for the 0805 size LEDs # driven by the 1V8 3V3 Translator chips are # shown in the following table. Note that the # maximum low output voltage from the translator # is 0.45 Volt. The expected drop across the LED # is shown in the second column. # # Value # Theory Actually # Value Used # --------- --------- # Red ( 3.3V - 1.9V - 0.45V ) / 4 mA = 238 Ohm --> 240 Ohm # Yellow ( 3.3V - 1.9V - 0.45V ) / 4 mA = 238 Ohm --> 240 Ohm # Green ( 3.3V - 2.1V - 0.45V ) / 4 mA = 188 Ohm --> 240 Ohm # Blue ( 5.0V - 3.25V - 0.45V ) / 4 mA = 325 Ohm --> 330 Ohm # # # # So using the 240 Ohm series resistors the current that we # actually expect through the different types of LEDs in the # circuits driven by the translator chips is: # # # Red ( 3.3V - 1.9V - 0.45V ) / 240 Ohm --> 3.96 mA # Yellow ( 3.3V - 1.9V - 0.45V ) / 240 Ohm --> 3.96 mA # Green ( 3.3V - 2.1V - 0.45V ) / 240 Ohm --> 3.13 mA # Blue ( 5.0V - 3.25V - 0.45V ) / 330 Ohm --> 3.94 mA # # # # The series resistors for the yellow and green LEDs driven # directly by the Broadcom Swithes are all shown at 220 Ohm # in their Demo board. Their specification sheet showns a # maximum Low Voltage output of 0.5 V at 8 mA for a 3V3 # output pin. With this specification and 240 Ohm resistors # the yellow and green LEDs will probably flow: # # # Yellow ( 3.3V - 1.9V - 0.50V ) / 240 Ohm --> 3.75 mA # Green ( 3.3V - 2.1V - 0.50V ) / 240 Ohm --> 2.92 mA # # # # So for now we will start with all LED series resistors # having a value of 240 Ohms except for the Blue LEDs # which run from 5 Volts will use a 330 Ohms series resistor. # Once we see the Hub Front Panel in operation we may need # to adjust the brightness of some of the LEDs. # # # The Blue LEDs are: LED4 ATCA Blue driven by IPMC # LED48 ROD pin C3 driven by U552 # LED49 ROD pin C4 driven by U552 # # # # # Board_Location # Ref Part_Number Symbol Geometry X Y Properties #----- ----------- ------ ------------------ -------------- ---------- # # # LED Series Resistors Starting from the Top of the card # with the resistors for the upper block # block of 40 LED. The last 2 digits of # the Resistor's reference designator match # the LED's reference designator. # # These are series resistors between an LED's # Cathode and the Driver for that LED. # R205 Res_240_Ohm_0603 SY_JUNK res_0603 56.00 39.00 2 90 R206 Res_240_Ohm_0603 SY_JUNK res_0603 54.00 39.00 2 90 R207 Res_240_Ohm_0603 SY_JUNK res_0603 127.50 39.00 2 90 R208 Res_240_Ohm_0603 SY_JUNK res_0603 129.50 39.00 2 90 R209 Res_240_Ohm_0603 SY_JUNK res_0603 145.50 39.00 2 90 R210 Res_240_Ohm_0603 SY_JUNK res_0603 143.50 39.00 2 90 R211 Res_240_Ohm_0603 SY_JUNK res_0603 141.50 39.00 2 90 R212 Res_240_Ohm_0603 SY_JUNK res_0603 139.50 39.00 2 90 R213 Res_240_Ohm_0603 SY_JUNK res_0603 147.50 35.50 2 90 R214 Res_240_Ohm_0603 SY_JUNK res_0603 149.50 33.00 2 90 R215 Res_240_Ohm_0603 SY_JUNK res_0603 151.50 33.00 2 90 R216 Res_240_Ohm_0603 SY_JUNK res_0603 153.50 33.00 2 90 R217 Res_240_Ohm_0603 SY_JUNK res_0603 176.50 37.50 1 90 R218 Res_240_Ohm_0603 SY_JUNK res_0603 178.50 37.50 1 90 R219 Res_240_Ohm_0603 SY_JUNK res_0603 84.00 39.00 2 90 R220 Res_240_Ohm_0603 SY_JUNK res_0603 82.00 39.00 2 90 R221 Res_240_Ohm_0603 SY_JUNK res_0603 86.00 39.00 2 90 R222 Res_240_Ohm_0603 SY_JUNK res_0603 88.00 39.00 2 90 R223 Res_240_Ohm_0603 SY_JUNK res_0603 113.50 39.00 2 90 R224 Res_240_Ohm_0603 SY_JUNK res_0603 111.50 39.00 2 90 R225 Res_240_Ohm_0603 SY_JUNK res_0603 117.50 39.00 2 90 R226 Res_240_Ohm_0603 SY_JUNK res_0603 115.50 39.00 2 90 R227 Res_240_Ohm_0603 SY_JUNK res_0603 119.50 39.00 2 90 R228 Res_240_Ohm_0603 SY_JUNK res_0603 121.50 39.00 2 90 R229 Res_240_Ohm_0603 SY_JUNK res_0603 125.50 39.00 2 90 R230 Res_240_Ohm_0603 SY_JUNK res_0603 123.50 39.00 2 90 R231 Res_240_Ohm_0603 SY_JUNK res_0603 58.00 39.00 2 90 R232 Res_240_Ohm_0603 SY_JUNK res_0603 60.00 39.00 2 90 R233 Res_240_Ohm_0603 SY_JUNK res_0603 64.00 39.00 2 90 R234 Res_240_Ohm_0603 SY_JUNK res_0603 62.00 39.00 2 90 R235 Res_240_Ohm_0603 SY_JUNK res_0603 68.00 39.00 2 90 R236 Res_240_Ohm_0603 SY_JUNK res_0603 66.00 39.00 2 90 R237 Res_240_Ohm_0603 SY_JUNK res_0603 74.00 39.00 2 90 R238 Res_240_Ohm_0603 SY_JUNK res_0603 76.00 39.00 2 90 R239 Res_240_Ohm_0603 SY_JUNK res_0603 135.50 39.00 2 90 R240 Res_240_Ohm_0603 SY_JUNK res_0603 137.50 39.00 2 90 R241 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 241.70 2 180 R242 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 243.60 2 180 R243 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 245.50 2 180 R244 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 247.40 2 180 # # LED Series Resistors Now the series Resistors for the 4 ATCA LEDs. # # I think that the IMPC (stupidly) drives # its output signals voltage Hi to turn ON # these LEDs. Thus, the Cathodes of these # LEDs are grounded and these Resistors go # in their Anode circuits. # R201 Res_240_Ohm_0603 SY_JUNK res_0603 12.50 248.20 2 0 R202 Res_240_Ohm_0603 SY_JUNK res_0603 12.50 243.10 2 0 R203 Res_240_Ohm_0603 SY_JUNK res_0603 12.50 238.00 2 0 R204 Res_330_Ohm_0603 SY_JUNK res_0603 7.50 60.00 2 0 # # LED Series Resistors Now the block of 5 ROD LEDs (LED_45 : LED_49) # and 3 Hub LEDs (LED_50 : LED_52). # # These are series resistors between the LED's # Cathode and the Driver for that LED. All of # the LED Anodes are connected to BULK_3V3 except # for the 2 Blue LEDs (LED_48 and LED_49) which # are powered from a +5V supply. # # The last 2 digits of the Series Resistor's # reference designator match the LED's reference # designator. # R245 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 235.90 2 180 R246 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 234.10 2 180 R247 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 232.30 2 180 R248 Res_330_Ohm_0603 SY_JUNK res_0603 23.00 230.50 2 180 R249 Res_330_Ohm_0603 SY_JUNK res_0603 23.00 228.70 2 180 R250 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 226.90 2 180 R251 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 225.10 2 180 R252 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 223.50 2 180 # # LED Series Resistors Now the series Resistors for the # "rationality" LEDs, i.e. # # - Iso +12 V Enabled and Running LED_53 # - All Supplies Running OK LED_54. # R253 Res_2.49k_Ohm_0805 SY_JUNK res_0805 23.00 217.00 2 0 R254 Res_240_Ohm_0603 SY_JUNK res_0603 23.00 214.00 2 0 # # LED Series Resistors Finally the 12 series Resistors for the # 3 Condo RJ-45 connectors. # Each of these RJ45 connectors has 4 LEDs. # R255 Res_240_Ohm_0603 Not_Installed res_0603_1sb 16.00 135.00 2 180 R256 Res_240_Ohm_0603 Not_Installed res_0603_1sb 16.00 113.00 2 180 R257 Res_240_Ohm_0603 SY_JUNK res_0603 86.50 282.00 2 90 R258 Res_240_Ohm_0603 SY_JUNK res_0603 88.50 282.00 2 90 R259 Res_240_Ohm_0603 SY_JUNK res_0603 131.50 39.00 2 90 R260 Res_240_Ohm_0603 SY_JUNK res_0603 133.50 39.00 2 90 R261 Res_240_Ohm_0603 SY_JUNK res_0603 78.00 39.00 2 90 R262 Res_240_Ohm_0603 SY_JUNK res_0603 80.00 39.00 2 90 R263 Res_240_Ohm_0603 SY_JUNK res_0603 46.00 39.00 2 90 R264 Res_240_Ohm_0603 SY_JUNK res_0603 48.00 39.00 2 90 R265 Res_240_Ohm_0603 SY_JUNK res_0603 50.00 39.00 2 90 R266 Res_240_Ohm_0603 SY_JUNK res_0603 52.00 39.00 2 90 # # LED translator/Driver for the ROD's FPGA and Phys Chip LEDs, and # the Driver for the ROD's Blue LEDs, and # the Driver for the ROD's LEMO Connector # U551 IC_74AVCH8T245 SY_JUNK tssop_24 110.00 282.00 2 0 C2901 Cap_220_nFd_0603 SY_JUNK cap_0603 108.00 288.00 2 0 C2902 Cap_220_nFd_0603 SY_JUNK cap_0603 112.00 288.00 2 0 U552 IC_74LVC07A SY_JUNK tssop_14 95.00 282.00 2 0 C2903 Cap_100_nFd_0603 SY_JUNK cap_0603 95.00 286.00 2 180 R2901 Res_4.99k_Ohm_0603 SY_JUNK res_0603 95.00 277.50 2 0 # # LED Translator/Driver for the Hub's FPGA and Phys Chip LEDs # U553 IC_74AVCH8T245 SY_JUNK tssop_24 33.00 229.00 2 0 C2904 Cap_220_nFd_0603 SY_JUNK cap_0603 33.00 223.00 2 0 C2905 Cap_220_nFd_0603 SY_JUNK cap_0603 33.00 235.00 2 0