xr16c2550ip Exar Corporation, xr16c2550ip Datasheet - Page 10

• Manufacturer Part Number: xr16c2550ip
• Description: Dual Uart With 16-byte Transmit And Receive Fifos
• Manufacturer: Exar Corporation

XR16C2550
2.97V TO 5.5V DUART WITH 16-BYTE FIFO
To obtain maximum data rate, it is necessary to use full rail swing on the clock input. See external clock
operating frequency over power supply voltage chart in
F
Requires a 2K ohms pull-up resistor on XTAL2 pin to increase operating speed
IGURE
F
IGURE
6. O
80
70
60
50
40
30
vcc
gnd
Operating frequency for XR16C2550
with external clock and a 2K ohms
PERATING
pull-up resistor on XTAL2 pin.
5. E
External Clock
3.0
XTERNAL
3.5 4.0
R1
2K
F
Suppy Voltage
REQUENCY VERSUS
VCC
10
C
Figure
LOCK
4.5
XTAL1
XTAL2
6.
C
ONNECTION FOR
5.0
5.5
P
-40
25
85
OWER
o
o
o
C
C
C
S
UPPLY
E
XTENDED
C
HART
D
xr
ATA
.
R
ATE
REV. 1.0.1