XR82C684CJ/44-F Exar Corporation, XR82C684CJ/44-F Datasheet - Page 67

• Manufacturer Part Number: XR82C684CJ/44-F
• Description: IC UART CMOS QUAD 44PLCC
• Manufacturer: Exar Corporation
• Type: CMOS Quad Channel UARTr

Specifications of XR82C684CJ/44-F

• Number Of Channels: 4, QUART
• Package / Case: 44-LCC (J-Lead)
• Features: *
• Fifo's: 3 Byte
• Voltage - Supply: 5V
• Mounting Type: Surface Mount
• 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: SMD/SMT
• Operating Supply Voltage: 5 V
• Propagation Delay Time Ns: 400 ns
• No. Of Channels: 4
• Supply Voltage Range: 4.75V To 5.25V
• Operating Temperature Range: 0°C To +70°C
• Digital Ic Case Style: PLCC
• No. Of Pins: 44
• Filter Terminals: SMD
• 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: 1016-1325-5

Example B: Programming the Bit Rate via the
Counter/Timer
bit rate is not offered by the BRG. In this case the user can
do the following.
Please note that when the QUART is programmed in this
configuration, the C/T output represents a 16X over
sample of the Transmitted and Received data. Therefore,
the chip circuitry will divide the 1 MHz square wave by 16,
just like for clock signals originating from the BRG.
Please note that this particular
Table 14
Table 15
Thus: Bit Rate = 1 MHz/16 = 62.5 kbps.
Example C: Using the External Input Ports
Note: x = don’t care
Please note that if the user were to apply this example,
he/she would be responsible for ensuring that the
incoming serial data stream is synchronous with the 1
MHz (1X) clock signal; in order to minimize bit errors.
XR82C684