XR88C681CJ View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XR88C681CJ

CMOS Dual Channel UART (DUART)

Exar Corporation 

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K. TIMING DIAGRAMS

XR88C681

4.0V

2.0V

0.8V

Test Levels

2.0V

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

tRES

Figure 51. Reset Timing

Rev. 2.11

91

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