Integration Guide

Chapter 3: Integration
LIM0001AA Rev B (DRAFT)
TTL Signals and Timing
Timing Measurement Notes
Output Low Level Voltage (V
OL
) 0.0 to 0.35 VDC The positive voltage from an output which the
device considers will be accepted as a logic low.
Input Low Level Voltage (V
IL
) 0.0 to 0.8 VDC The positive voltage applied to the input which will
be accepted by the device as a logic low.
Input High Level Voltage (V
IH
) 2.0 to 5.0 VDC The positive voltage applied to the input which will
be accepted by the device as a logic high.
Output High Level Voltage (V
OH
) 2.0 to 3.3 VDC The positive voltage from an output which the
device considers will be accepted as a logic high.
Data Format Mark = 3.3 V
Space = 0 V
RS232 formatted data, inverted.
20
Draft