參數資料
型號: XR16L2551IM
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: LOW VOLTAGE DUART WITH POWERSAVE
中文描述: 2 CHANNEL(S), 3.125M bps, SERIAL COMM CONTROLLER, PQFP48
封裝: 7 X 7 MM, 1 MM HEIGHT, TQFP-48
文件頁數: 12/48頁
文件大?。?/td> 287K
代理商: XR16L2551IM
XR16L2551
LOW VOLTAGE DUART WITH POWERSAVE
á
REV. 1.0.0
12
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
.
The L2551 divides the basic external clock by 16. The basic 16X clock provides table rates to support standard
and custom applications using the same system design. The Baud Rate Generator divides the input 16X clock
by any divisor from 1 to 2
16
-1. The rate table is configured via the DLL and DLM internal register functions.
Customized Baud Rates can be achieved by selecting the proper divisor values for the MSB and LSB sections
of baud rate generator.
Table 6
shows the standard data rates available with a 14.7456 MHz crystal or external clock at 16X sampling
rate. When using a non-standard frequency crystal or external clock, the divisor value can be calculated for
DLL/DLM with the following equation.
F
IGURE
6. O
PERATING
F
REQUENCY
C
HART
. R
EQUIRES
A
2K
OHMS
PULL
-
UP
RESISTOR
ON
XTAL2
PIN
TO
INCREASE
OPERATING
SPEED
divisor (decimal) = (XTAL1 clock frequency) / (serial data rate x 16)
60
50
40
30
3.0
4.5
5.5
3.5 4.0
5.0
Suppy Voltage
X
70
80
85
o
C
25
o
C
-40
o
C
Operating frequency for XR16L2551
with external clock and a 2K ohms
pull-up resistor on XTAL2 pin.
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相關代理商/技術參數
參數描述
XR16L2551IM-0A-EB 功能描述:UART 接口集成電路 Supports L2551 48 ld TQFP, ISA Interface RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16L2551IM-0B-EB 功能描述:UART 接口集成電路 Supports L2551 48 ld TQFP, PCI Interface RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16L2551IM-F 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16L2551IMTR-F 制造商:Exar Corporation 功能描述:UART 2-CH 16Byte FIFO 2.5V/3.3V/5V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR16L2551IMTR-F
XR16L2552 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART WITH 16-BYTE FIFO