LT1791A データシートの表示（PDF） - Linear Technology
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LT1791A Datasheet PDF : 16 Pages
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LT1785/LT1785A/
LT1791/LT1791A
TYPICAL APPLICATION
RO 1
RE 2
3
DE
DI 4
RX
LT1785
TX
RT
B 7 120Ω
A6
67
AB
LT1785
6
7
AB
LT1785
RT
120Ω 7 B
6A
RX
LT1785
TX
1
RO
2 RE
3
DE
4
DI
178591 F10
4
32 1
DI DE RE RO
4 3 21
DI DE RE RO
Figure 10. Half-Duplex RS485 Network Operation
RO 1
RE 2
3
DE
DI 4
RX
LT1785
TX
8
VCC
B7
A6
5
RAYCHEM
POLYSWITCH
TR600-150
×2
47Ω
RT,120Ω
47Ω
CARBON
COMPOSITE
5W
0.1μF
300V
1.5KE36CA
Figure 11. RS485 Network with 120V AC Line Fault Protection
178591 F11
RELATED PARTS
PART NUMBER
LTC485
LTC491
LTC1483
LTC1485
LTC1487
LTC1520
LTC1535
LTC1685
LTC1687
DESCRIPTION
Low Power RS485 Interface Transceiver
Differential Driver and Receiver Pair
Ultralow Power RS485 Low EMI Transceiver
Differential Bus Transceiver
Ultralow Power RS485 with Low EMI, Shutdown and High Input Impedance
50Mbps Precision Quad Line Receiver
Isolated RS485 Full-Duplex Transceiver
52Mbps RS485 Half-Duplex Transceiver
52Mbps RS485 Full-Duplex Transceiver
COMMENTS
ICC = 300μA (Typ)
ICC = 300μA
Controlled Driver Slew Rate
10Mbaud Operation
Up to 256 Transceivers on the Bus
Channel-to-Channel Skew 400ps (Typ)
2500VRMS Isolation in Surface Mount Package
Propagation Delay Skew 500ps (Typ)
Propagation Delay Skew 500ps (Typ)
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
178591fb
LT 0608 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1998
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