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參數資料
| 型號： | XR16L2550 |
| 廠商： | Exar Corporation |
| 英文描述： | LOW VOLTAGE DUART WITH 16-BYTE FIFO |
| 中文描述： | 低壓杜阿爾特16字節FIFO |
| 文件頁數： | 1/45頁 |
| 文件大小： | 278K |
| 代理商： | XR16L2550 |
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Exar
Corporation 48720 Kato Road, Fremont CA, 94538
(510) 668-7000
FAX (510) 668-7017
www.exar.com
á
XR16L2550
LOW VOLTAGE DUART WITH 16-BYTE FIFO
SEPTEMBER 2003
GENERAL DESCRIPTION
REV. 1.0.0
The XR16L2550
1
(L2550) is a dual universal
asynchronous receiver and transmitter (UART). The
XR16L2550 is an improved version
ST16C2550 UART with lower operating voltages and
5 volt tolerant inputs. The L2550 provides enhanced
UART functions with 16 byte FIFOs, a modem control
interface and data rates up to 4 Mbps. Onboard
status registers provide the user with error indications
and operational status. System interrupts and modem
control features may be tailored by external software
to meet specific user requirements. Independent
programmable baud rate generators are provided to
select transmit and receive clock rates up to 3.125
Mbps. The Baud Rate Generator can be configured
for either crystal or external clock input. An internal
loopback capability allows onboard diagnostics. The
L2550 is available in a 44-pin PLCC, 48-pin TQFP
and 32-pin QFN packages. The L2550 is fabricated in
an advanced CMOS process.
of the
N
OTE
:
1 Covered by U.S. Patent #5,649,122.
APPLICATIONS
Portable Appliances
Medical Monitors
Base Stations
Micro Servers
Telecommunication Network Routers
Industrial Automation Controls
FEATURES
2.25 to 5.5 Volt operation
5 Volt tolerant inputs
Pin-to-pin compatible to Exar’s ST16C2450,
ST16C2550 and XR16L2750 in 44-PLCC and 48-
TQFP packages
Pin-to-pin compatible to XR16C2850 in 44-PLCC
Pin alike XR16L2551, XR16L2751 and XR16C2850
in 48-TQFP package
Two independent UART channels
I
Up to 3.125Mbps with external clock of 50 MHz
I
Register Set compatible to 16C550
I
16 byte Transmit FIFO to reduce the bandwidth
requirement of the external CPU
I
16 byte Receive FIFO with error tags to reduce
the bandwidth requirement of the external CPU
I
4 selectable Receive FIFO interrupt trigger
levels
I
Automatic RTS/CTS hardware flow control
I
Automatic Xon/Xoff software flow control
I
Wireless infrared encoder/decoder
I
Full Modem Interface (CTS#, RTS#, DSR#,
DTR#, RI#, CD#)
I
Programmable character lengths (5, 6, 7, 8)
with even, odd, or no parity
Tiny 32-QFN, no lead package (5x5x0.9mm)
44-PLCC and 48-TQFP packages also available
F
IGURE
1. XR16L2550 B
LOCK
D
IAGRAM
XTAL1
XTAL2
Crystal Osc/Buffer
TXA, RXA, DTRA#,
DSRA#, RTSA#,
DTSA#, CDA#, RIA#,
OP2A#
8-bit Data
Bus
Interface
UART Channel A
16 Byte TX FIFO
16 Byte RX FIFO
BRG
TX & RX
UART
Regs
2.25 to 5.5 Volt VCC
GND
TXB, RXB, DTRB#,
DSRB#, RTSB#,
CTSB#, CDB#, RIB#,
OP2B#
UART Channel B
(same as Channel A)
A2:A0
D7:D0
IOR#
CSA#
CSB#
INTA
INTB
IOW#
Reset
TXRDYA#
TXRDYB#
RXRDYA#
RDRXYB#
* 5 Volt Tolerant Inputs
相關PDF資料 |
PDF描述 |
|---|---|
| XR16L2551 | LOW VOLTAGE DUART WITH POWERSAVE |
| XR16L2551IL | LOW VOLTAGE DUART WITH POWERSAVE |
| XR16L2551IM | LOW VOLTAGE DUART WITH POWERSAVE |
| XR16L2552IJ | 2.25V TO 5.5V DUART WITH 16-BYTE FIFO |
| XR16L2552IM | 2.25V TO 5.5V DUART WITH 16-BYTE FIFO |
相關代理商/技術參數 |
參數描述 |
|---|---|
| XR16L2550_07 | 制造商:EXAR 制造商全稱:EXAR 功能描述:LOW VOLTAGE DUART WITH 16-BYTE FIFO |
| XR16L2550IJ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| XR16L2550IJ-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 |
| XR16L2550IL | 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 |
| XR16L2550IL-0A-EB | 功能描述:UART 接口集成電路 Supports L2550 32pin QFN, 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 |
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