XR88C681CP/40 Exar Corporation, XR88C681CP/40 Datasheet - Page 82

• Manufacturer Part Number: XR88C681CP/40
• Description: Dual Channel UART
• Manufacturer: Exar Corporation

Specifications of XR88C681CP/40

• Features: *
• Number Of Channels: 2, DUART
• Fifo's: 1 Byte, 3 Byte
• Voltage - Supply: 5V
• With Parallel Port: Yes
• With Cmos: Yes
• Mounting Type: Through Hole
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XR88C681
Transmitting Device
Receiving Device
IP2
RTSA
(OP0)
(RTS-in)
CTSA
OP3
(IP0)
(CTS-out)
TXDA
RXDB
TXRDY_A
(OP7)
To CPU
TXRDY_A
RTSA
CTSA
RXDA
Figure 44. Block Diagram and Timing Sequence of Two DUARTs Connected
in the Transmitter-RTS Controlled Configuration.
Rev. 2.11
82