xr68c681 Exar Corporation, xr68c681 Datasheet - Page 66

• Manufacturer Part Number: xr68c681
• Description: Cmos Dual Channel Uart Duart
• Manufacturer: Exar Corporation

J. Timing Diagrams
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”.
XR68C681
Figure 31. Input and Output Levels for Timing Measurements
Figure 32. Reset Timing