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參數資料
| 型號： | XR16L651 |
| 廠商： | Exar Corporation |
| 英文描述： | 2.5V, 3.3V and 5V Low Power UART with 32-Byte FIFO(2.5V, 3.3V和5V 低功耗通用異步接收器/發送器（帶32字節先進先出）) |
| 中文描述： | 2.5V，3.3V與5V的低功耗的UART與32字節的FIFO（2.5伏，3.3伏和5V的低功耗通用異步接收器/發送器（帶32字節先進先出）） |
| 文件頁數： | 1/46頁 |
| 文件大小： | 516K |
| 代理商： | XR16L651 |
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Exar
Corporation 48720 Kato Road, Fremont CA, 94538
(510) 668-7000
FAX (510) 668-7017
www.exar.com
á
PRELIMINARY
XR16L651
2.5V, 3.3V AND 5V LOW POWER UART WITH 32-BYTE FIFO
JANUARY 2001
REV. P1.0.0
GENERAL DESCRIPTION
The XR16L651
1
(651) is a 2.5V, 3.3V and 5V Univer-
sal Asynchronous Receiver and Transmitter (UART)
with 5V tolerant inputs. This new device supports Intel
and Motorola data bus interface and is software com-
patible to industry standard 16C450, 16C550,
ST16C580 and ST16C650A UARTs.
The 651 has 32 bytes of TX and RX FIFOs and is ca-
pable of operating up to serial data rate of 2 Mbps at
3.3V supply voltage. The internal registers include the
16C550 register set plus Exar’s enhanced registers
for additonal features to support today’s highly de-
manding data communication needs. The enhanced
features include automatic hardware and software
flow control, selectable TX and RX trigger levels, and
wireless infrared (IrDA) encoder/decoder.
The device provides a new capability to give user the
ability to program the wireless infrared encoder out-
put pulse width, hence, reduces the power consump-
tion of the handheld unit.
The XR16L651 device comes in in a small 7x7x1mm
48-pin TQFP package with commercial and industrial
temperature ranges.
N
OTE
:
Covered by US patents #5,649,122 and #5,949,787
N
OTE
:
Underline features are exclusive to XR16L651.
FEATURES
2.5V, 3.3V and 5V Operation w/ 5V tolerant Inputs
2
ST16C450/550/580/650A Software Compatible
Intel, Motorola
2
or PC Mode 8-bit Bus Interface
Up to 1Mbps Data Rate at 3.3V Operation
32-byte Transmit and Receive FIFOs
Automatic Hardware (RTS/CTS) Flow Control
Hardware Flow Control Hysteresis
Automatic Software (Xon/Xoff) Flow Control
Infrared (IrDA) Encoder/Decoder Enable Input
2
Programmable Infrared Encoder Pulse Witdh
Sleep Mode with Wake-up Indicator
48-pin TQFP Package (7x7x1mm)
Commercial and Industrial Temperature Grades
APPLICATIONS
Battery Operated Electronics
Internet Appliances
Handheld Terminal
Personal Digital Assistants
Cellular Phones DataPort
Wireless Infrared Data Communications Systems
F
IGURE
1. B
LOCK
D
IAGRAM
XTAL1/CLK
XTAL2
Crystal Osc/Buffer
DTR#, DSR#,
RTS#, CTS#,
CD#, RI#
Intel,
Motorola
or PC
Data Bus
Interface
32 Byte TX FIFO
Baud Rate Generator
Infrared Encoder and
Pulse Width Control
Transmitter
UART
Configuration
Regs
IOR
IOR#
32 Byte RX FIFO
Infrared
Decoder
Receiver with Auto
Software Flow Control
Modem Control Signals
TX
RX
CTS Flow
Control
RTS Flow
Control
BRG
Prescaler
CS1
CS0
DDIS#
ENIR
INT
TXRDY#
RDRDY#
A2:A0
D7:D0
IOW
CS2#
IM#
PCMODE#
S1
S2
S3
IRQA
IRQB
IRQC
IOW#/R/W#
RESET
PC Mode:
COM 1 to 4
Decode Logic
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相關代理商/技術參數 |
參數描述 |
|---|---|
| XR16L651CM | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V UART WITH 32-BYTE FIFO |
| XR16L651CM-0A-EVB | 功能描述:UART 接口集成電路 Supports L651 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 |
| XR16L651CM-F | 功能描述:UART 接口集成電路 UARTW/32BYTEFIFO 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 |
| XR16L651CMTR-F | 制造商:Exar Corporation 功能描述:UART 1-CH 32Byte FIFO 2.5V/3.3V/5V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR16L651CMTR-F |
| XR16L651IM | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
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