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參數資料
| 型號： | XR16L2751 |
| 廠商： | Exar Corporation |
| 英文描述： | 2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE |
| 中文描述： | 2.25V至5.5V的杜阿爾特64字節FIFO和省電 |
| 文件頁數： | 1/52頁 |
| 文件大小： | 618K |
| 代理商： | XR16L2751 |
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Exar
Corporation 48720 Kato Road, Fremont CA, 94538
(510) 668-7000
FAX (510) 668-7017
www.exar.com
á
XR16L2751
2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE
SEPTEMBER 2002
REV. 1.0.0
GENERAL DESCRIPTION
The XR16L2751
1
(2751) is a low voltage dual
universal asynchronous receiver and transmitter
(UART) with 5 Volt tolerant inputs. The device
includes
2
additional
XR16L2750: Intel and Motorola data bus selection
and a “PowerSave” mode to further reduce sleep
current to a minimum during sleep mode. The 2751’s
register set is compatible to the ST16C2550 and
XR16C2850 but with added functions. It supports the
Exar’s enhanced features of 64 bytes of TX and RX
FIFOs, programmable FIFO trigger level, FIFO level
counters, automatic hardware and software flow
control, automatic RS-485 half duplex direction
control with programmable turn-around delay, and a
complete modem interface. Onboard registers
provide the user with operational status and data
error tags. An internal loopback capability allows
onboard diagnostics. Independent programmable
baud rate generator is provided in each UART
channel to support data rates up to 6.25 Mbps.
N
OTE
:
1 Covered by U.S. Patent #5,649,122 and #5,832,205
APPLICATIONS
Portable and Battery Operated Appliances
Wireless Access Servers
Ethernet Network Routers
Cellular Data Devices
Telecommunication Network Routers
Factory Automation and Process Controls
capabilities
over
the
FEATURES
2.25 to 5.5 Volt Operation
5 Volt Tolerant Inputs
Functionally Compatible to ST16C2550 and
XR16C2850 with 4 additional inputs
Intel or Motorola Data Bus Interface Select
Two Independent UARTs
I
Up to 6.25 Mbps at 5 Volt, 4 Mbps at 3.3 Volt,
and 3 Mbps at 2.5 Volt with 8X sampling rate
I
64 bytes of Transmit and Receive FIFOs
I
Transmit and Receive FIFO Level Counters
I
Programmable TX and RX FIFO Trigger Levels
I
Automatic Hardware (RTS/CTS) Flow Control
I
Selectable RTS Flow Control Hysteresis.
I
Automatic Software (Xoff/Xon) Flow Control
I
Automatic RS-485 2-wire Half-duplex Direction
Control to the Transceiver via RTS#
I
Full Modem Interface
I
Infrared Receive and Transmit Encoder/
decoder
PowerSave Feature reduces sleep current to 15 μA
at 3.3 Volt
Device Identification
Crystal or external clock input
Industrial and Commercial Temperature ranges
48 TQFP Package (7 x 7 x 1.0 mm)
F
IGURE
1. XR16L2751 B
LOCK
D
IAGRAM
XTAL1
XTAL2
Crystal Osc/Buffer
TXA, RXA, DTRA#,
DSRA#, RTSA#,
DTSA#, CDA#, RIA#,
OP2A#
Intel or
Motorola
Data Bus
Interface
UART Channel A
64 Byte TX FIFO
64 Byte RX FIFO
BRG
IR
ENDEC
TX & RX
UART
Regs
2.25 to 5.5 Volt VCC
GND
*5 Volt Tolerant Inputs
2751BLK
TXB, RXB, DTRB#,
DSRB#, RTSB#,
CTSB#, CDB#, RIB#,
OP2B#
UART Channel B
(same as Channel A)
A2:A0
D7:D0
CSA# (CS#)
CSB# (A3)
INTA (IRQ#)
INTB (logic 0)
TXRDYA#
TXRDYB#
RXRDYA#
RXRDYB#
16/68#
CLKSEL
HDCNTL#
PwrSave
IOW# (R/W#)
IOR# (VCC)
Reset (Reset#)
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| XR16L2751IM | 2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE |
| XR16L2752 | 2.25V TO 5.5V DUART WITH 64-BYTE FIFO |
| XR16L2752CJ | 2.25V TO 5.5V DUART WITH 64-BYTE FIFO |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| XR16L2751_05 | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE |
| XR16L2751CM | 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE |
| XR16L2751CM-0A-EB | 功能描述:UART 接口集成電路 Supports L2751 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 |
| XR16L2751CM-0B-EB | 功能描述:UART 接口集成電路 Supports L2751 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 |
| XR16L2751CM-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 |
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