5 4 3 2 1 LAN8740 / LAN8741 MII PHY Customer Evaluation Board Assy 6695 D D PCB Revision A Schematic Revision 1.1 Design Details Board: Assy 6695 Chip: SMSC LAN8740 / LAN8741 C Circuit Diagrams utilizing SMSC Products Are Included As A Means Of Illustrating Typical Semiconductor Applications: Consequently Complete Information Sufficient For Construction Purposes Is Not Necessarily Given. The Information Has Been Carefully Checked And Is Believed To Be Entirely Reliable. However, No Responsibility Is Assumed For Inaccuracies. Furthermore, Such Information Does Not Convey To The Purchaser Of The Semiconductor Devices Described Any License Under The Patent Rights Of SMSC Or Others. SMSC Reserves The Right To Make Changes At Any Time In Order To Improve Design And Supply The Best Product Possible. Board Form Factor: MII Assembly: 32 Lead QFN w/ Exposed GND Pad Revision History ITEM BLOCK DIAGRAM C Page(s) Title Page 1 LAN8740 / LAN8741 MII PHY Customer Evaluation Board2 Rev 1.0: Initial release, Rev C Rev 1.1: B Page 2: Added R40 & R41 in rework R20 changed to 0 Ohm C13 and C14 changed to 39pF B A A Title LAN8740 / LAN8741 MII PHY Customer Evaluation Board Size Assembly No. Engineer J.M. Date: 5 4 3 2 6695 Wednesday, August 29, 2012 1 PCB Rev Schematic Rev A Sheet 1.1 1 of 2 5 4 +5V 3 2 AVDD +3.3V AVDD_ETH TP7 Test Point - White 1 VR1 TP2 Test Point - Red +5V 1 Vin 2 GND 3 OUT 5 R18 2.0A/0.050 DCR ON/OFF BYPS C4 0.01uF 50V 10% C2 4.7uF 6.3V 10% D C18 0.1uF 16V 10% C5 0.1uF 16V 10% R12 0 TP5 C17 10uF 25V 10% LED1_CATHODE 1.00M DNP Reset Generator 3 MR RESET 10.0K 10 XTAL2 31 RXN 30 3 2 LED1/nINT/nPME/REGOFF LED2/nINT/nPME/nINTSEL nINT/TXER/TXD4 18 nINT RBIAS 32 RBIAS 1 27 nRST XTAL1/CLKIN A C RXN RXP C8 0.022uF 50V 10% C9 10pF 50V 5% DNP R22 12.1K 1/10W 1% TD- 2 C10 10pF 50V 5% DNP C11 10pF 50V 5% DNP 3 RD+ 5 RXCT 7&8 6 RD- 6 7 NC 8 CHS GND C12 10pF 50V 5% DNP 75 3 75 1000 pF 2 kV YEL LED2_ANODE LED2_CATHODE R23 0 TP4 1210 1 3 C14 39pF 50V 5% C LED2 (Yellow) = SPEED Test Point - Black GND Note: Capacitors C9 through C12 are optional for EMI purposes and are not populated on the LAN8740/41 evaluation board. These capacitors are required for operation in an EMI constrained environment. Note: Depopulate R46 when nINT function is enabled. Populate R46 when nINT function is disabled. TXER R46 0 DNP GND 1 C15 0.1uF 10V 10% RXP LED1/nINT/nPME/REGOFF LED2/nINT/nPME/nINTSEL 4 2 1 75 LED1 (Green) = LINK/ACT U2 LAN8740 / 41 5 4&5 75 RCV 2 1 C13 39pF 50V 5% nRST 2 R20 0 2 VCC 2 4 1 R44 4.75K 1% U4 VTH = 2.63V Treset = 20 mS SPST_MOM B Y1 25.000MHz HC49US VDDIO +3.3V R47 XTAL2 TXCT A XTAL1/CLKIN R21 TD+ 4 12 19 1 C nRST 5173278-2 TXN 28 RJ45 11 100 100 TXCLK TXEN TXD0 TXD1 TXD2 TXD3 COL/CRS_DV/MODE2 CRS TXN 29 MTG R9 R10 20 21 22 23 24 25 15 14 TXP MTG TXCLK TXEN TXD0 TXD1 TXD2 TXD3 COL/CRS_DV/MODE2 CRS 100 MDIO MDC RXD3/PHYAD2 RXD2/nPME/RMIISEL RXD1/MODE1 RXD0/MODE0 RXDV RXCLK/PHYAD1 RXER/RXD4/PHYAD0 16 R8 16 17 8 9 10 11 26 7 13 15 MDIO MDC RXD3/PHYAD2 RXD2/nPME/RMIISEL RXD1/MODE1 RXD0/MODE0 RXDV RXCLK/PHYAD1 RXER/RXD4/PHYAD0 100 100 100 100 100 100 100 GRN XMIT GND R1 R2 R3 R4 R5 R6 R7 LED1_ANODE R17 0 GND MDIO MDC R_RXD3 R_RXD2 R_RXD1 R_RXD0 R_RXDV R_RXCLK R_RXER TXER R_TXCLK TXEN TXD0 TXD1 TXD2 TXD3 R_COL R_CRS VDD2A VDD1A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 GND_EP MII Signal Header +5V MDIO MDC RXD3 RXD2 RXD1 RXD0 RX_DV RX_CLK RX_ER TX_ER TX_CLK TX_EN TXD0 TXD1 TXD2 TXD3 COL CRS +5V R16 49.9 1/10W 1% TXP 33 HEADER_2x14 +5V GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND +5V R15 49.9 1/10W 1% T1 Pulse J0011D01BNL VDDIO 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 MDIO R_RXD3 R_RXD1 R_RXDV R_RXER R_TXCLK TXD0 TXD2 R_COL R14 49.9 1/10W 1% C7 0.1uF 16V 10% P1 2 4 6 8 10 12 14 16 18 20 22 24 26 28 R13 49.9 1/10W 1% 14 R11 1.50K 1/10W 1% +5V 12 VDDIO VDDCR 9 VDDIO 13 - S1 C3 4.7uF 6.3V 10% 6 + J1 C C6 0.1uF 16V 10% Test Point - Purple VDDIO C16 0.1uF 16V 10% 1 3 5 7 9 11 13 15 17 19 21 23 25 27 0 Test Point - Orange +3.3V 4 LP2992IM5-3.3 SOT23-5 +5V nRST MDC R_RXD2 R_RXD0 R_RXCLK TXER TXEN TXD1 TXD3 R_CRS nINT TP8 Test Point - Yellow TP1 MII +5V decoupling capacitors to be placed near MII connector +3.3V 1 FB1 VDDCR D C1 1.0uF 16V 10% 1 R45 4.75K 1/10W 1% MIC6315-26D2UY SOT-143_BIG1 REGOFF & INTSEL Configuration Resistors nPME Test Point B PHY Address / Mode / (R)MII Select Configuration Resistors VDDCR Decoupling Capacitors VDDCR TP6 AVDD 1 VDDIO RXD2/nPME/RMIISEL TP3 REGOFF JP1 LED1/nINT/nPME/REGOFF 1 2 3 1 R40 330 2 1/10W 1% 1 PHYADD2 R24 4.75K 1/10W 1% DNP R25 4.75K 1/10W 1% DNP R26 4.75K 1/10W 1% DNP MII/RMII MODE2 MODE1 Test Point - Green VDDCR DNP MODE0 R28 4.75K 1/10W 1% R29 4.75K 1/10W 1% C19 470pF 50V 5% R30 4.75K 1/10W 1% C20 1.0uF 16V 10% Note: C19 & C20 decoupling capacitors for VDDCR should be placed as close to LAN8740/41 as possible. LED1_CATHODE 2 LED1/nINT/nPME/REGOFF 3 PHYADD1 LED1_ANODE R38 4.75K 1/10W JP2 PHYADD0 RXD0/MODE0 RXD1/MODE1 Note: R40 and R41 added in rework Default Jumper Settings: 1--2 COL/CRS_DV/MODE2 RXD2/nPME/RMIISEL AVDD MTG1 1 RXD3/PHYAD2 nINTSEL MTG2 1 NC NC A A JP3 RXCLK/PHYAD1 1 2 LED2/nINT/nPME/nINTSEL 3 1 R41 330 2 1/10W 1% LED2_ANODE RXER/RXD4/PHYAD0 3 Plated Hole w_GND R37 4.75K 1/10W 1% R39 4.75K 1/10W JP4 LED2/nINT/nPME/nINTSEL 1 2 LED2_CATHODE R36 4.75K 1/10W 1% R35 4.75K 1/10W 1% R34 4.75K 1/10W 1% R33 4.75K 1/10W 1% DNP R32 4.75K 1/10W 1% DNP 3 3 Plated Hole w_GND R31 4.75K 1/10W 1% DNP Title LAN8740 / LAN8741 MII PHY Customer Evaluation Board Size Assembly No. Engineer J.M. Date: 5 4 3 2 6695 Wednesday, August 29, 2012 1 PCB Rev Schematic Rev A Sheet 1.1 2 of 2