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| 型号： | LTC1535ISW#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC TRANSCEIVER RS485 ISO 28SOIC |
| 标准包装： | 1,000 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RS485 |
| 电源电压： | 4.5 V ~ 5.5 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： | 带卷 (TR) |
LTC1535
1
1535fb
TYPICAL APPLICATION
FEATURES
DESCRIPTION
Isolated RS485 Transceiver
The LTC1535 is an isolated RS485 full-duplex differential
line transceiver. Isolated RS485 is ideal for systems where
the ground loop is broken to allow for much larger common
mode voltage ranges. An internal capacitive isolation barrier
provides 2500VRMSofisolationbetweenthelinetransceiver
and the logic level interface. The powered side contains a
420kHz push-pull converter to power the isolated RS485
transceiver. Internal full-duplex communication occurs
through the capacitive isolation barrier. The transceiver
meets RS485 and RS422 requirements.
The driver and receiver feature three-state outputs, with
the driver maintaining high impedance over the entire
common mode range. The drivers have short-circuit
current limits in both directions and a slow slew rate select
to minimize EMI or reections. The 68kΩ receiver input
allows up to 128 node connections. A fail-safe feature
defaults to a high output state when the receiver inputs
are open or shorted.
APPLICATIONS
n UL Rated Isolated RS485: 2500VRMS
UL Recognized
File #E151738
n Eliminates Ground Loops
n 250kBd Maximum Data Rate
n Self-Powered with 420kHz Converter
n Half- or Full-Duplex
n Fail-Safe Output High for Open or
Shorted Receiver Inputs
n Short-Circuit Current Limit
n Slow Slew Rate Control
n 68kΩ Input Impedance Allows Up to 128 Nodes
n Thermal Shutdown
n 8kV ESD Protection On Driver Outputs and
Receiver Inputs
n Available in 28-Lead SW Package
n Isolated RS485 Receiver/Driver
n RS485 with Large Common Mode Voltage
n Breaking RS485 Ground Loops
n Multiple Unterminated Line Taps
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
**
D
Y
Z
SLO
2
1
R
A
B
RO2
1535 TA01
VCC
RO
RE
DE
DI
GND
LOGIC COMMON
2
FLOATING RS485 COMMON
** COOPER (888) 414-2645
420kHz
28
27
26
25
4
17
15
16
18
12
13
14
11
1
+
GND2
1/2 BAT54C
VCC2
ST1
ST2
3
2
VCC
RO
RE
DE
DI
1
10μF
2
CTX02-14659
TWISTED-PAIR
CABLE
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