XR88C681CP/28 EXAR [Exar Corporation], XR88C681CP/28 Datasheet - Page 91

• Manufacturer Part Number: XR88C681CP/28
• Description: CMOS Dual Channel UART (DUART)
• Manufacturer: EXAR [Exar Corporation]

XR88C681
K. TIMING DIAGRAMS
2.0V
2.0V
4.0V
Test Levels
0.8V
0.8V
Figure 50. Input and Output Levels for Timing Measurements
Note: AC testing inputs are driven at 0.4V for a logic “0” and 2.4V for a logic “1” except for -40 to 85(C and -55 to 125(C, logic “1” shall
be 2.6V. Timing measurements are made at 0.8V for a logic “0” and 2.0V for a logic “1”.
RESET
t
RES
Figure 51. Reset Timing
Rev. 2.11
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