LTC2871IFE#PBF Linear Technology, LTC2871IFE#PBF Datasheet - Page 17

• Manufacturer Part Number: LTC2871IFE#PBF
• Description: IC, RS232-RS485 TXRX, 200MBPS, 5.5V, TSSOP-38
• Manufacturer: Linear Technology

Specifications of LTC2871IFE#PBF

• Device Type: Transceiver
• No. Of Drivers: 2
• Supply Voltage Range: 3V To 5.5V
• Driver Case Style: TSSOP
• No. Of Pins: 38
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Ic Interface Type: RS232, RS485

FUNCTION TABLES
Table 1. LTC2870 Mode Selection Table
Table 2. LTC2871 Mode Selection Table (CH2 = 0)
Table 3. RS232 Receiver Mode (485/232 = 0 for LTC2870, CH2 = 0 for LTC2871)
Table 4. RS232 Driver Mode (485/232 = 0 for LTC2870, CH2 = 0 for LTC2871)
RX232 OR RXEN
DX232 OR DXEN
FEN
FEN
0
0
1
X
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
1
0
0
0
0
1
1
485/232
RX232
X
0
X
0
0
1
1
1
1
1
1
0
1
1
X
0
X
X
X
X
X
0
(A, B, RIN1, RIN2)
RECEIVER INPUTS
RXEN
DX232
(DY , DZ, DIN1, DIN2)
1
1
1
X
0
X
0
X
X
X
0
0
X
X
X
X
X
X
X
0
0
1
DRIVER INPUTS
X
0
1
X
DXEN
X
X
0
1
RX485
0
0
0
1
X
1
X
X
X
X
X
X
X
X
X
X
X
X
1
1
0
0
TE485
Thermal Fault
CONDITIONS
DX485
0
X
0
X
X
X
X
1
X
X
X
X
No Fault
No Fault
No Fault
0
0
X
X
1
X
X
X
X
X
H/F
X
X
X
X
X
X
X
X
0
1
X
X
TE485
Thermal Fault
CONDITIONS
X
X
X
X
X
X
X
X
0
0
No Fault
No Fault
No Fault
LB
X
X
X
X
0
0
0
0
0
0
1
1
(RA, RB, ROUT1, ROUT2)
RECEIVER OUTPUTS
DC/DC
CONVERTER MODE AND COMMENTS
OFF
OFF
ON
ON
ON
ON
ON
ON
X
X
ON
ON
H/F
X
X
X
X
X
X
X
X
0
1
Hi-Z
Hi-Z
LB
X
X
0
0
0
0
0
0
1
1
1
0
DC/DC
CONVERTER MODE AND COMMENTS
OFF
ON
ON
ON
ON
ON
X
X
ON
ON
LTC2870 DRIVER OUTPUTS
Low Power Shutdown: All Main Functions Off
Low Power Shutdown: All Main Functions Off
Fast-Enable: DC/DC Converter On Only
RS232 Drivers On
RS232 Receivers On
RS485 Driver On
RS485 Receiver On
RS485 Driver and Receiver 120Ω Termination Enabled
RS485 Full-Duplex Mode
RS485 Half-Duplex Mode
RS485 Loopback Mode
RS232 Loopback Mode
125kΩ
125kΩ
(Y , Z)
LTC2870 RECEIVER INPUTS
1
0
Low Power Shutdown: All Main Functions Off
Fast-Enable: DC/DC Converter On Only
RS232 Drivers On
RS232 Receivers On
RS485 Driver On
RS485 Receiver On
RS485 Full-Duplex Mode
RS485 Half-Duplex Mode
RS485 Loopback Mode
RS232 Loopback Mode
125kΩ
(A, B)
LTC2870/LTC2871
5kΩ
5kΩ
5kΩ
LTC2871 DRIVER OUTPUTS
LTC2871 RECEIVER INPUTS
(DOUT1, DOUT2)
(RIN1, RIN2)
Hi-Z
Hi-Z
1
0
Hi-Z
5kΩ
5kΩ
5kΩ
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