Datasheet

LAN8740A/LAN8740Ai
DS00001987A-page 16  2013-2015 Microchip Technology Inc.
2.2 Buffer Types
TABLE 2-9: BUFFER TYPES
Buffer Type Description
IS Schmitt-triggered input
O12 Output with 12 mA sink and 12 mA source
VIS Variable voltage Schmitt-triggered input
VO8 Variable voltage output with 8 mA sink and 8 mA source
VOD8 Variable voltage open-drain output with 8 mA sink
PU 50 µA (typical) internal pull-up. Unless otherwise noted in the pin description, internal pull-ups
are always enabled.
Note: Internal pull-up resistors prevent unconnected inputs from floating. Do not rely on
internal resistors to drive signals external to the device. When connected to a load
that must be pulled high, an external resistor must be added.
PD 50 µA (typical) internal pull-down. Unless otherwise noted in the pin description, internal pull-
downs are always enabled.
Note: Internal pull-down resistors prevent unconnected inputs from floating. Do not rely
on internal resistors to drive signals external to the device. When connected to a
load that must be pulled low, an external resistor must be added.
AI Analog input
AIO Analog bi-directional
ICLK Crystal oscillator input pin
OCLK Crystal oscillator output pin
P Power pin
Note: The digital signals are not 5 V tolerant. Refer to Section 5.1, "Absolute Maximum Ratings*" for additional
buffer information.
Note: Sink and source capabilities are dependent on the VDDIO voltage. Refer to Section 5.1, "Absolute Maxi-
mum Ratings*" for additional information.