REV. 1.1.3 2.10 Programmable Baud Rate Generator A single baud rate generator is" />
參數(shù)資料
型號: XR16L2550IL-F
廠商: Exar Corporation
文件頁數(shù): 2/44頁
文件大?。?/td> 0K
描述: IC UART FIFO 16B DUAL 32QFN
標(biāo)準(zhǔn)包裝: 490
特點(diǎn): *
通道數(shù): 2,DUART
FIFO's: 16 字節(jié)
規(guī)程: RS232
電源電壓: 2.25 V ~ 5.5 V
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 32-QFN 裸露焊盤(5x5)
包裝: 托盤
XR16L2550
10
LOW VOLTAGE DUART WITH 16-BYTE FIFO
REV. 1.1.3
2.10
Programmable Baud Rate Generator
A single baud rate generator is provided for the transmitter and receiver, allowing independent TX/RX channel
control. The programmable Baud Rate Generator is capable of operating with a crystal frequency of up to 24
MHz. However, with an external clock input on XTAL1 pin and a 2K ohms pull-up resistor on XTAL2 pin (as
shown in Figure 5) it can extend its operation up to 64 MHz (4Mbps serial data rate) at room temperature and
5.0V.
FIGURE 5. EXTERNAL CLOCK CONNECTION FOR EXTENDED DATA RATE
2K
XTAL1
XTAL2
R1
VCC
External Clock
vcc
gnd
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 Figure 6.
FIGURE 6. OPERATING FREQUENCY CHART. REQUIRES A 2K OHMS PULL-UP RESISTOR
ON
XTAL2 PIN TO INCREASE OPERATING SPEED
60
50
40
30
3.0
4.5
5.5
3.5 4.0
5.0
Suppy Voltage
XT
AL1
Ext
e
rna
lClock
F
requ
ency
in
MH
z.
70
80
85oC
25oC
-40oC
Operating frequency for XR16L2550
with external clock and a 2K ohms
pull-up resistor on XTAL2 pin.
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