XR88C681CJ View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XR88C681CJ

CMOS Dual Channel UART (DUART)

Exar Corporation 

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XR88C681

C1: 10pF + (Stray < 5pF)

C2: 10pF + (Stray < 5pF)

R1: 100ohm

R2: 100ohm

R1

X1

C1

XR88C681

C2

3.6864MHz

R2

X2

Parallel Resonant Crystal

C1: 10 - 15pF + (Stray < 5pF)

C2: 0 - 5pF + (Stray < 5pF)

X1

C1

XR88C681

C2

X2

3.6864MHz

Parallel Resonant Crystal

X1/CLK

C/T CLK

RXC

TXC

tCLK

tCTC

tRTX

tCLK

tCTC

tRTX

Figure 56. Clock Timing

Rev. 2.11

95

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