XR17D154IV-F Exar Corporation, XR17D154IV-F Datasheet - Page 8

• Manufacturer Part Number: XR17D154IV-F
• Description: IC UART PCI BUS QUAD 144LQFP
• Manufacturer: Exar Corporation
• Type: IrDA or RS- 485r

Specifications of XR17D154IV-F

• Number Of Channels: 4, QUART
• Package / Case: 144-LQFP
• Features: *
• Fifo's: 64 Byte
• Protocol: RS485
• Voltage - Supply: 3.3V, 5V
• With Auto Flow Control: Yes
• With Irda Encoder/decoder: Yes
• With False Start Bit Detection: Yes
• With Modem Control: Yes
• Mounting Type: Surface Mount
• Data Rate: 6.25 Mbps
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• Supply Current: 4 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V or 5 V
• No. Of Channels: 4
• Uart Features: Tx/Rx FIFO Counters
• Supply Voltage Range: 3V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: LQFP
• 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: 1016-1290

XR17D154
UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART
The XR17D154 is designed to operate with VCC (voltage to the UART Core Logic) greater than or equal to
VIO. See Table 1 below for valid combintions of VCC and VIO that can be used with the device..
For a universal add-in card, it is usually unknown whether it will be plugged into a 3.3V or 5V PCI slot, therefore
VCC must be 5V to guarantee proper functionality in any PCI slot as shown in
system, the designer can choose to use a 3.3V or 5V power supply for the UART core voltage. Of course, the
core voltage can be 3.3V only when the VIO is 3.3V. In
XR17D154 in an embedded system.
F
1.0 APPLICATION EXAMPLES
IGURE
3. T
YPICAL
(3.3V or 5V)
(up to 33.34MHz)
A
VIO
PPLICATION FOR A
T
ABLE
CLK
1: V
ALID
VCC
5.0V
5.0V
3.3V
3.3V
C
Interface
OMBINATIONS OF
U
Local
PCI
Bus
NIVERSAL
5.0V
3.3V
5.0V
3.3V
VIO
A
DD
M ax Crystal Frequency = 24M Hz
8
-
M ax External Clock = 50M Hz
IN
VCC
Figure
UART Core Logic
C
UART Channel 0
UART Channel 1
UART Channel 2
UART Channel 3
ARD
AND
Invalid
Valid
Valid
Valid
4, examples 1-3 show valid applications of the
VIO S
UPPLY
V
OLTAGES
Figure
VCC = 5V
3. In an embedded
xr
REV. 1.2.2