LTC1485IS8#TR Linear Technology, LTC1485IS8#TR Datasheet - Page 5

• Manufacturer Part Number: LTC1485IS8#TR
• Description: IC TXRX BUS/LINE RS485 LP 8SOIC
• Manufacturer: Linear Technology
• Type: Transceiverr

Specifications of LTC1485IS8#TR

• Number Of Drivers/receivers: 1/1
• Protocol: RS422, RS485
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PI FU CTIO S
TEST CIRCUITS
RO (Pin 1): Receiver Output. If the receiver output is
enabled (RE low), then if A > B by 200mV, RO will be high.
If A < B by 200mV, then RO will be low.
RE (Pin 2): Receiver Output Enable. A low enables the
receiver output, RO. A high input forces the receiver
output into a high impedance state.
DE (Pin 3): Driver Output Enable. A high on DE enables the
driver outputs, A and B. A low input will force the driver
outputs into a high impedance state.
U
RECEIVER
OUTPUT
U
Figure 3. Receiver Timing Test Load
Figure 1. Driver DC Test Load
A
B
U
C
V
L
OD2
1k
R
R
V
S1
S2
OC
1485 F01
1k
1485 F03
V
CC
DI
DI (Pin 4): Driver Input. If the driver outputs are enabled
(DE high), then a low on DI forces the driver outputs A low
and B high. A high on DI will force A high and B low.
GND (Pin 5): Ground Connection.
A (Pin 6): Driver Output/Receiver Input.
B (Pin 7): Driver Output/Receiver Input.
V
CC
(Pin 8): Positive Supply. 4.75V V
UNDER TEST
DRIVER
Figure 2. Driver/Receiver Timing Test Circuit
OUTPUT
A
B
Figure 4. Driver Timing Test Load
R
DIFF
C
500
L
C
C
L2
L1
S2
S1
A
B
RECEIVER
CC
1485 F04
V
LTC1485
CC
5.25V.
1485 F02
15pF
RO
5