XR88C681CP/40-F Exar Corporation, XR88C681CP/40-F Datasheet - Page 50

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XR88C681CP/40-F

Manufacturer Part Number
XR88C681CP/40-F
Description
IC UART CMOS DUAL 40PDIP
Manufacturer
Exar Corporation
Type
CMOS Dual Channel UARTr
Datasheet

Specifications of XR88C681CP/40-F

Number Of Channels
2, DUART
Package / Case
40-DIP (0.600", 15.24mm)
Features
*
Fifo's
1 Byte, 3 Byte
Voltage - Supply
5V
With Parallel Port
Yes
With Cmos
Yes
Mounting Type
Through Hole
Data Rate
1 Mbps
Supply Voltage (max)
5.25 V
Supply Voltage (min)
4.75 V
Supply Current
15 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
Through Hole
Operating Supply Voltage
5 V
Propagation Delay Time Ns
400 ns
No. Of Channels
2
Supply Voltage Range
4.75V To 5.25V
Operating Temperature Range
0°C To +70°C
Digital Ic Case Style
DIP
No. Of Pins
40
Filter Terminals
DIP
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
1016-1328-5

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
XR88C681CP/40-F
Manufacturer:
Linear
Quantity:
185
D. TIMING CONTROL BLOCK
The Timing Control Block allows to the user to specify the
bit rates that he/she wishes to transmit and receive data at
each channel. The Timing Control Block consists of the
following elements:
D Oscillator Circuit
D Bit Rate Generator
V
cc
Rev. 2.11
MN/
HOLD
-
DT/
DEN
8086 CPU
-
-
R
MX
AD8 - AD15
AD0 - AD7
Figure 23. Schematic of the XR88C681 DUART Device Interfacing to a
M/
-
INTR
INTA
ALE
-
-
RD
WR
-
IO
“Min” Mode 8086 CPU Device
D
C
D
C
74LS373
74LS373
D0 - D7
Q
Q
D8 - D15
50
A8 - A15
D 16 bit Counter/Timer
D 4 - External Input Pins (to clock the Transmitters
D Two Clock Select Registers (32:1 MUXs)
Figure 24 presents a block diagram of the Timing Control
block for the XR88C681 device.
and Receivers, directly)
A4 - A7
-
MEMW
-
MEMR
from higher
priority device
Address
Decoder
A0 - A3
A0 - A3
-
-
-
-
-
IEI
D0 - D7
IACK
RD
WR
CS
INTR
XR88C681

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