参数资料
| 型号： | XR19L222IL64-F |
| 厂商： | Exar Corporation |
| 文件页数： | 34/53页 |
| 文件大小： | 0K |
| 描述： | IC UART/TXRX RS232 64QFN |
| 标准包装： | 260 |
| 特点： | * |
| 通道数： | 2，DUART |
| FIFO's： | 64 字节 |
| 规程： | RS232 |
| 电源电压： | 3.3 V ~ 5.5 V |
| 带自动流量控制功能： | 是 |
| 带IrDA 编码器/解码器： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-VFQFN 裸露焊盘 |
| 供应商设备封装： | 64-QFN（9x9） |
| 包装： | 托盘 |
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XR19L222
4
TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
REV. 1.0.1
MODEM OR SERIAL I/O INTERFACE (EIA-232/RS-232 Voltage Levels)
TXDA
44
O
UART Channel A Transmit Data. The TX signal will be LOW (< 1.5V) during reset or idle (no
data).
RXDA
36
I
UART Channel A Receive Data. The RX data input must idle LOW (< 1.5V). This input has
an internal pull-down resistor and can be left unconnected when not used.
RTSA
31
O
UART Channel A Request-to-Send or general purpose outputs. These outputs must be
asserted prior to using auto RTS flow control, see EFR[6], MCR[1] and IER[6].
CTSA
1
I
UART Channel A Clear-to-Send or general purpose inputs. It can be used for auto CTS
flow control, see EFR[7], MSR[4] and IER[7]. This input has an internal pull-down resistor
and can be left unconnected when not used.
DTRA
41
O
UART Channel A Data-Terminal-Ready or general purpose outputs.
DSRA
40
I
UART Channel A Data-Set-Ready or general purpose inputs. This input has an internal pull-
down resistor and can be left unconnected when not used.
CDA
61
I
UART Channel A Carrier-Detect or general purpose inputs. This input has an internal pull-
down resistor and can be left unconnected when not used.
RIA
60
I
UART Channel A Ring-Indicator or general purpose inputs. This input has an internal pull-
down resistor and can be left unconnected when not used.
TXDB
29
O
UART Channel B Transmit Data. The TX signal will be LOW (< 1.5V) during reset or idle (no
data).
RXDB
32
I
UART Channel B Receive Data. RXDB will be the input signal to the internal UART when
RXBSEL is LOW. If RXB is used, then RXBSEL should be HIGH. The RX data input must
idle LOW (< 1.5V). This input has an internal pull-down resistor and can be left uncon-
nected when not used.
RTSB
4
O
UART Channel B Request-to-Send or general purpose outputs. These outputs must be
asserted prior to using auto RTS flow control, see EFR[6], MCR[1] and IER[6].
CTSB
3
I
UARTChannel B Clear-to-Send or general purpose inputs. It can be used for auto CTS
flow control, see EFR[7], MSR[4] and IER[7]. This input has an internal pull-down resistor
and can be left unconnected when not used.
DTRB
13
O
UART Channel B Data-Terminal-Ready or general purpose outputs.
DSRB
16
I
UART Channel B Data-Set-Ready or general purpose inputs. This input has an internal pull-
down resistor and can be left unconnected when not used.
CDB
62
I
UART Channel B Carrier-Detect or general purpose inputs. This input has an internal pull-
down resistor and can be left unconnected when not used.
RIB
15
I
UART Channel B Ring-Indicator or general purpose inputs. This input has an internal pull-
down resistor and can be left unconnected when not used.
SERIAL I/O INTERFACE (CMOS/TTL Voltage Levels)
TXB
10
O
UART Channel B Transmit data. This is the TXB output signal from the UART. This pin can
be used to communicate with an external Infrared or RS-422 transceiver if TXDB is unused.
RXB
9
I
UART Channel B Receive data. This is the RXB input signal to the UART. If RXDB is not
used (RXBSEL is HIGH), then this pin can be used to communicate with an external Infra-
red or RS-422 transceiver. If RXDB is used (RXBSEL is LOW), this pin should be left open.
Pin Descriptions
NAME
64-QFN
PIN#
TYPE
DESCRIPTION
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| XR19L400IL40-0B-EB | 功能描述:界面开发工具 Supports L400 40 pin QFN, PCI Interface RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
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