IIH High Level Input Current
JEDEC – The current into an input terminal when a specified high-level voltage is applied to that input.
TI – The current into an input when a high-level voltage is applied to that input.
IIL Low Level Input Current
JEDEC – The current into an input terminal when a specified low-level voltage is applied to that input.
TI – The current out of an input when a low-level voltage is applied to that input.
IIH and IIL typically are found only on devices with bipolar inputs that usually require a significantly different amount of pulldown current on the input to provide a logic low, rather than pullup current to provide a logic high. CMOS inputs usually have only leakage currents at the inputs and use the II parameter, but are measured at both low- and high-bias conditions.
This tutorial is based on the Understanding and Interpreting Standard Logic Data Sheets application report (SZZA036). To download the full PDF version of this application report, please use the following URL: http://www.ti.com/lit/szza036
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