- 您现在的位置：买卖IC网 > PDF目录372174 > SP3220EU Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C PDF资料下载
参数资料
| 型号： | SP3220EU |
| 元件分类： | 外设及接口 |
| 英文描述： | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| 中文描述： | 电可擦除可编程逻辑器件 |
| 文件页数： | 9/19页 |
| 文件大小： | 160K |
| 代理商： | SP3220EU |
9
Rev: A Date:12/11/03 SP3220EB/EU +3.0 to +5.0V RS-232 Transceivers
Copyright 2002 Sipex Corporation
DESCRIPTION
The
SP3220EB/EU
device meets the EIA/TIA-
232 and V.28/V.24 communication protocols
and can be implemented in battery-powered,
portable, or hand-held applications such as
notebook or palmtop computers. The
SP3220EB/
EU
device features
Sipex's
proprietary on-
board charge pump circuitry that generates 2 x
V
for RS-232 voltage levels from a single
+3.0V to +5.5V power supply. This series is
ideal for +3.3V-only systems, mixed +3.0V to
+5.5V systems, or +5.0V-only systems that re-
quire true RS-232 performance. The
SP3220EB
device has a driver that can operate at a data rate
of 250Kbps fully loaded. The
SP3220EU
can
Operate at 1000Kbps
The
SP3220EB/EU
is a 1-driver/1-receiver de-
vice ideal for portable or hand-held applications.
The
SP3220EB/EU
features a 1
μ
A shutdown
mode that reduces power consumption and ex-
tends battery life in portable systems. Its receiv-
ers remain active in shutdown mode, allowing
external devices such as modems to be
monitored using only 1
μ
A supply current.
THEORY OF OPERATION
The
SP3220EB/EU
device is made up of three
basic circuit blocks: 1. Drivers, 2. Receivers,
and 3. the Sipex proprietary charge pump.
Drivers
The drivers are inverting level transmitters that
convert TTL or CMOS logic levels to +5.0V
EIA/TIA-232 levels inverted relative to the
input logic levels. Typically, the RS-232 output
voltage swing is +5.5V with no load and at least
+5V minimum fully loaded. The driver outputs
are protected against infinite short-circuits to
ground without degradation in reliability. Driver
outputs will meet EIA/TIA-562 levels of +3.7V
with supply voltages as low as 2.7V.
The
SP3220EB
drivers typically can operate at
a data rate of 250Kbps fully loaded with 3K
in
parallel with 1000pF, ensuring compatibility
with PC-to-PC communication software.
The SP3220EU drivers can guarantee a data rate
of 1000Kbps fully loaded with 3 in parallel
with 250pF.
The slew rate of the SP3220EB output is inter-
nally limited to a maximum of 30V/
μ
s in order to
meet the EIA standards (EIA RS-232D 2.1.7,
Paragraph 5). The transition of the loaded output
from HIGH to LOW also meets the monotonicity
requirements of the standard.
Figure 12
shows a loopback circuit used to test
the RS-232 driver.
Figure 13
shows the test
results of the loopback circuit with the
SP3220EB
driver active at 250Kbps with an RS-232 load in
parallel with a 1000pF capacitor.
Figure 14
shows the test results where the
SP3220EU
driver was active at 1000Kbps and loaded with
an RS-232 receiver in parallel with a 250pF
capacitor. A solid RS-232 data transmission rate
of 250Kbps provides compatibility with many
designs in personal computer peripherals and
LAN applications.
The
SP3220EB/EU
driver's output stage is turned
off (high-Z) when the device is in shutdown
mode. When the power is off, the
SP3220EB/
EU
device permits the outputs to be driven up to
+12V. The driver's input does not have pull-up
resistors. Designers should connect an unused
input to V
CC
or GND.
In the shutdown mode, the supply current falls to
less than 1
μ
A, where SHDN = LOW. When the
SP3220EB/EU
device is shut down, the device's
driver output is disabled (high-Z) and the charge
pump is turned off with V+ pulled down to V
and V- pulled to GND. The time required to exit
shutdown is typically 100
μ
s. Connect SHDN to
V
if the shutdown mode is not used. SHDN has
no effect on RxOUT.
Note that the driver is
enabled only when the magnitude of V- exceeds
approximately 3V.
相关PDF资料 |
PDF描述 |
|---|---|
| SP3220ECA | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| SP3220ECT | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| SP3220ECY | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| SP3220EET | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| SP3220EEY | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SP3220EUCA | 制造商:Exar Corporation 功能描述: 制造商:Exar Corporation 功能描述:LINE TRANSCEIVER, PDSO16 |
| SP3220EUCA-L | 功能描述:RS-232接口集成电路 RS232 1drvr/1rcvr 0C to 70C RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| SP3220EUCA-L/TR | 功能描述:RS-232接口集成电路 RS232 1drvr/1rcvr 0C to 70C RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| SP3220EUCT | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:High Speed +3.0V to +5.5V RS-232 Driver/Receiver Pair |
| SP3220EUCT-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
发布紧急采购，3分钟左右您将得到回复。