LAN8740A Datasheet, PDF (115/136 Pages) Microchip Technology – Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

LAN8740A/LAN8740Ai
5.5 DC Specifications
Table 5-4 details the non-variable I/O buffer characteristics. These buffer types do not support variable voltage opera-
tion. Table 5-5 details the variable voltage I/O buffer characteristics. Typical values are provided for 1.8 V, 2.5 V, and 3.3
V VDDIO cases.
TABLE 5-4: NON-VARIABLE I/O BUFFER CHARACTERISTICS
Parameter
IS Type Input Buffer
Symbol
Min.
Typ.
Max.
Unit
Note
Low Input Level
High Input Level
Negative-Going Threshold
Positive-Going Threshold
Schmitt Trigger Hysteresis
(V_IHT - V_ILT)
Input Leakage
(V_IN = VSS or VDDIO)
Input Capacitance
O12 Type Buffers
V_ILI
V_IHI
V_ILT
V_IHT
V_HYS
I_IH
C_IN
-0.3
3.6
1.01
1.19
1.39
1.39
1.59
1.79
336
399
459
-10
10
2
V
V
V Schmitt trigger
V Schmitt trigger
mV
µA (see Note 1)
pF
Low Output Level
High Output Level
ICLK Type Buffer
(XTAL1 Input)
V_OL
V_OH
VDD2A - 0.4
0.4
V I_OL = 12 mA
V I_OH = -12 mA
(see Note 2)
Low Input Level
High Input Level
V_ILI
-0.3
V_IHI
VDDCR-0.35
0.35
V
3.6
V
Note 1: This specification applies to all inputs and tri-stated bi-directional pins. Internal pull-down and pull-up resis-
tors add ±50 µA per-pin (typical).
2: XTAL1/CLKIN can optionally be driven from a 25 MHz single-ended clock oscillator.
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DS00001987A-page 115