User manual

Advantech SOM-Express Design Guide
26 Chapter 2 SOM-Express Overview
Table 2.16 DC specifications for 3.3V signaling of PCI Bus
Symbol Parameter Min Max Units Note
Vcc Supply Voltage 3.0 3.6 V
Vih
Input High Voltage 0.5Vcc Vcc+0.5 V
Vil
Input Low Voltage -0.5 0.3Vcc V
Vipu
Input Pull-up Voltage 0.7Vcc - V *1
Voh
Output High Voltage 0.9Vcc - V
Vol
Output Low Voltage - 0.1Vcc V
*1. This specification should be guaranteed by design. It is the minimum voltage to which pull-
up resistors are calculated to pull a floated network. Applications sensitive to static power
utilization must assure that the input buffer is conducting minimum current at this input
voltage.