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参数资料
| 型号： | LTC1387IG#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232/RS485 5VSNGL20SSOP |
| 标准包装： | 1,800 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 2/2 |
| 规程： | RS232，RS485 |
| 电源电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 带卷 (TR) |
10
LTC1387
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
EMI and signal reflection problems. Slow slew rate sys-
tems can often use improperly terminated or even
unterminated cables with acceptable results. The RS485
differential input receiver features an offset input thresh-
old of – 80mV at 0V common mode voltage. This allows
the receiver output to have a known High output state
when the inputs are open or shorted. The receiver also
features an input hysteresis of 40mV. The charge pump
can be kept active regardless of the state of DXEN and
RXEN pins by keeping the ON pin High. This improves the
receiver response time by removing the 100
s charge
pump start-up time.
In RS232 mode, the drivers and receivers can be selected
from the Function Tables with control inputs ON, RXEN
and DXEN. The receivers feature a typical 0.6V input
hysteresis.
All the interface driver outputs are fault protected by a
current limiting and thermal shutdown circuit. The thermal
shutdown circuit disables both the RS232 and RS485
driver outputs when the die temperature reaches 150
°C.
The thermal shutdown circuit reenables the drivers when
the die temperature cools to 135
°C.
A loopback mode enables internal connections from driver
outputs to receiver inputs for self-test. The driver outputs
are not isolated from the external loads during loopback.
The charge pump generates boosted positive voltage VDD
and negative voltage VEE for true RS232 levels from a
single 5V VCC supply. The charge pump requires four
0.1
F capacitors.
RA
RB
DY
DZ
A
B
Y
Z
RA
RB
DY
DZ/SLEW
ON
VCC
RXEN
DXEN
485/232
CONTROLLER
DX/RX
RXEN
DXEN
MODE
INTERFACE
A
B
RS232
RS485
RS232
RS485
SHUTDOWN
TRANSMIT MODE
RECEIVE MODE
TRANSMIT MODE
RECEIVE MODE
MODE
RXEN = 0
RXEN = 1
RXEN = 0
RXEN = 1
RXEN = 0
DXEN = 1
DXEN = 0
DXEN = 1
DXEN = 0
MODE = 0
MODE = 1
MODE = X
1387 F13
LTC1387
Figure 13. Half-Duplex RS232 (1-Channel), Half-Duplex RS485
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1387ISW | 制造商:Linear Technology 功能描述:Single Transmitter/Receiver RS-232/RS-485 20-Pin SOIC W |
| LTC1387ISW#PBF | 功能描述:IC TXRX RS232/RS485 5VSNGL20SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:RS-232 & USB Transceiver 标准包装:2,000 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SSOP（0.209"，5.30mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:296-19849-2 |
| LTC1387ISW#TR | 功能描述:IC TXRX RS232/RS485 5V 20SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LTC1387ISW#TRPBF | 功能描述:IC TXRX RS232/RS485 5VSNGL20SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LTC1387ISWPBF | 制造商:Linear Technology 功能描述:RS-232/RS-485 Driver/Receiver SOIC20W |
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