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参数资料
| 型号： | SP2209EEY-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 5/17页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 DUAL PORT 38TSSOP |
| 产品变化通告： | Packaging Change 15/Jul/2010 |
| 标准包装： | 1,500 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 6/10 |
| 规程： | RS232 |
| 电源电压： | 10.8 V ~ 13.2 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-TFSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 38-TSSOP |
| 包装： | 带卷 (TR) |
Exar Corporation 48720 Kato Road, Fremont CA, 94538 510-668-7017 www.exar.com
SP2209E_100_071612
13
APPLICATIONS
With six drivers and ten receivers, the
SP2209E device is ideal for applications
requiring two RS-232 ports such as in
desktop or portable computers. Refer to
Figure 13. For typical DB9 serial ports for
Data Terminal Equipment (DTE) to Data
Circuit Terminating Equipment (DCE)
interface implementation, 2 data lines,
TxD and RxD, and 6 control lines, RTS,
DTR, DSR, CTS, and RI, are required.
The straight-through pinout for data lines
in the
SP2209E device allows a simplified
PCB layout allowing ground lines to sepa-
rate the signal lines and ground planes
to be placed beneath the IC without the
complication of a multi-layer PCB layout.
A receiver from each port, R5INA and
R5INB, are active while the rest of the
channels are powered down. This allows
the
SP2209E device to monitor peripheral
devices while the rest of the system is in
a power-saving standby mode. Failsafe
receiver outputs are pulled high if the
receiver inputs are left unconnected or at
zero input. The
SP2209E device can be
implemented as a power management
device to wake up the entire system when
any communication is initiated in periph-
eral devices. The
SP2209E device has a
low standby current of 100A.
A standard serial mouse can be powered
from the
SP2209E drivers. Two driver
outputs connected in parallel and set to
V
OH can be used to supply power to the V+
pin of the mouse. The third driver is set
to V
OL to link current from the V- terminal.
Typical mouse specifications are 10mA at
+6V and 5mA at -6V.
LapLink Compatibility
The
SP2209E can operate up to 460kbps
data under maximum driveload conditions
of C
L = 1000pF and RL = 3k at minimum
power supply voltages.
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