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I/O port characteristics

WizfFi250 is a small size wireless module. Unless otherwise specified, parameters are given as in the table below.

Symbol Parameter Conditions Min Typ Max Unit
VIL Standard IO input low level voltage -0.3 0.28*(VDD-2V)+0.8V V
IO FT(1) input low level voltage -0.3 0.32*(VDD-2V)+0.75V V
VIH Standard IO input high level voltage 0.41*(VDD-2V)+1.3V VDD+0.3 V
IO FT(1) input high level voltage VDD > 2V 0.42*(VDD-2V)+1V 5.5 V
VDD≤ 2V 5.2
Vhys Standard IO Schmitt trigger voltage hysteresis(2) 200 mV
IOFT Schmitt trigger voltage hysteresis(2) 5%VDD(3) mV
Ilkg Input leakage current(4) VSS≤VIN≤VDD
Standard I/Os
±1 μA
RPU Weak pull-up equivalent resistor(5) VIN=VSS 30 40 50 k Ω
RPD Weak pull-down equivalent resistor(5) VIN=VDD 30 40 50 k Ω
CIO I/O pin capacitance 5 pF

1. FT = Five-volt tolerant. In order to sustain a voltage higher than VDD+0.3 the internal pull-up/pull-down resistors must be disabled.
2. Hysteresis voltage between Schmitt trigger switching levels. Based on characterization, not tested in production.
3. With a minimum of 100 mV.
4. Leakage could be higher than max. if negative current is injected on adjacent pins.
5. Pull-up and pull-down resistors are designed with a true resistance in series with a switchable PMOS/NMOS. The MOS/NMOS contribution to the series resistance is minimum(~10% order).

products/wizfi250/wizfi250ds/6.ioportcharacteristics.txt · Last modified: 2015/03/16 10:33 (external edit)