Details

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BUY LAN91C111-NU https://www.utsource.net/itm/p/486746.html
IC ETHERNET CTLR MAC PHY 128TQFP

Parameter	Description	Value/Range
Device Type	10/100 Ethernet Transceiver	-
Package Type	48-Pin LQFP	-
Operating Voltage	Supply Voltage for Core (VCC)	3.3V ± 5%
Operating Temperature	Industrial Temperature Range	-40°C to +85°C
Data Rate	Ethernet Speeds Supported	10 Mbps / 100 Mbps
Interface	MII (Media Independent Interface)	-
PHY	Integrated 10BASE-T/100BASE-TX PHY	-
Power Consumption	Active Mode (100 Mbps)	275 mW typical
Standby Mode	Power Down Mode	< 1 mW
Wake-Up Modes	Magic Packet, Wake-on-LAN	-
LEDs	Link/Activity LED, 10/100 Speed LED	-
Clock Input	External Crystal or Oscillator	25 MHz
ESD Protection	Human Body Model (HBM)	±2 kV
MTBF	Mean Time Between Failures	> 1,000,000 hours

Instructions for Use:

1. Power Supply:

   • Connect the VCC pin to a 3.3V supply with a tolerance of ±5%.
   • Ensure a stable power supply by using appropriate decoupling capacitors (e.g., 0.1 μF and 10 μF) placed close to the VCC pins.

2. Clock Input:

   • Connect a 25 MHz crystal or oscillator to the XIN and XOUT pins for proper operation of the device.

3. Reset:

   • Apply a reset signal to the RESET pin for at least 100 ns to initialize the device properly.

4. MII Interface:

   • Connect the MII interface pins (TXD[3:0], RXD[3:0], TX_EN, RX_ER, CRS, COL) to the MAC controller of your system.

5. PHY Configuration:

   • Configure the PHY settings via the SMI (Serial Management Interface) using the MDC and MDIO pins.

6. LEDs:

   • Connect the LINK/ACT and SPD LEDs to the respective pins for visual indication of link status and speed.

7. Power Management:

   • To enter power-down mode, set the appropriate register bits via the SMI.
   • To wake up from power-down mode, use the magic packet or wake-on-LAN feature.

8. ESD Protection:

   • Handle the device with ESD precautions to avoid damage.
   • Use ESD protection devices on I/O lines if required.

9. Mounting and Layout:

   • Follow recommended PCB layout guidelines to ensure optimal performance and signal integrity.
   • Place the device in a location that allows for adequate heat dissipation.

10. Testing:

    • After assembly, perform functional tests to verify correct operation of the Ethernet transceiver.
    • Use standard Ethernet test equipment to validate link establishment and data transmission.

(For reference only)