Electronic Components Datasheet Search
  English  ▼

X  

Preview PDF HTML

LTC2870 Datasheet(PDF) 18 Page - Linear Technology

Part # LTC2870
Description  RS232/RS485 Multiprotocol Transceivers with Integrated Termination
PDF  36 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2870 Datasheet(HTML) 18 Page - Linear Technology

Back Button LTC2870 Datasheet HTML 14Page - Linear Technology LTC2870 Datasheet HTML 15Page - Linear Technology LTC2870 Datasheet HTML 16Page - Linear Technology LTC2870 Datasheet HTML 17Page - Linear Technology LTC2870 Datasheet HTML 18Page - Linear Technology LTC2870 Datasheet HTML 19Page - Linear Technology LTC2870 Datasheet HTML 20Page - Linear Technology LTC2870 Datasheet HTML 21Page - Linear Technology LTC2870 Datasheet HTML 22Page - Linear Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 18 / 36 page
background image
LTC2870/LTC2871
18
28701f
FUNCTION TABLES
Table 5. LTC2871 CH2 CONTROL
CH2
DX232
RX232
RS232 RECEIVER INPUTS
RS232 DRIVER OUTPUTS
COMMENTS
RIN1
RIN2
DOUT1
DOUT2
X
0
1
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Both Drivers and Receivers Disabled
0
0
0
5kΩ
5kΩ
Hi-Z
Hi-Z
Both Receivers Enabled, Both Drivers Disabled
0
1
1
Hi-Z
Hi-Z
Driven
Driven
Both Receivers Disabled, Both Drivers Enabled
0
1
0
5kΩ
5kΩ
Driven
Driven
Both Receivers and Drivers Enabled
1
0
0
5kΩ
Hi-Z
Hi-Z
Hi-Z
Channel 2 Drivers and Receivers Disabled
1
1
1
Hi-Z
Hi-Z
Driven
Hi-Z
Channel 2 Drivers and Receivers Disabled
1
1
0
5kΩ
Hi-Z
Driven
Hi-Z
Channel 2 Drivers and Receivers Disabled
Table 6. RS485 Driver Mode (TE485 = 0)
DX485 OR DXEN
DI
CONDITIONS
Y
Z
0
X
No Fault
125kΩ
125kΩ
1
0
No Fault
0
1
1
1
No Fault
1
0
X
X
Thermal Fault
125kΩ
125kΩ
Table 7. RS485 Receiver Mode (LB = 0)
RXEN OR RX485
A - B (NOTE 5)
CONDITIONS
RA, RO
1
X
No Fault
Hi-Z
0
< –200mV
No Fault
0
0
> 200mV
No Fault
1
0
Inputs Open or Shorted Together (DC)
Failsafe
1
X
X
Thermal Fault
Hi-Z
Table 8. RS485 Termination (485/232 = 1 for LTC2870)
TE485
H/F, LB
CONDITIONS
R (A TO B)
R (Y TO Z)
0
X
No Fault
Hi-Z
Hi-Z
1
X
No Fault
120Ω
120Ω
X
X
Thermal Fault
Hi-Z
Hi-Z
Table 9. RS485 Duplex Control (485/232 = 1 for LTC2870)
H/F
RS485 DRIVER OUTPUTS
RS485 RECEIVER INPUTS
0
Y, Z
A, B
1
Y, Z
Y, Z
Table 10. LTC2870 Loopback Functions
LB
RXEN
MODE
0
X
Not Loopback
X
1
Not Loopback
1
0
Loopback (RA = DY, RB = DZ)
Table 11. LTC2871 Loopback Functions
LB
RX232
RX485
MODE
0
X
X
Not Loopback
X
1
1
Not Loopback
1
0
1
Loopback RS232 (ROUT1 = DIN1, ROUT2 = DIN2)
1
1
0
Loopback RS485 (R0 = DI)
1
0
0
Loopback All (ROUT1 = DIN1, ROUT2 = DIN2, RO = DI)



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com