LTC2851 LINER [Linear Technology], LTC2851 Datasheet - Page 8

• Manufacturer Part Number: LTC2851
• Description: 20Mbps RS485 Transceivers
• Manufacturer: LINER [Linear Technology]

pin FuncTions
LTC2859/LTC2861
RO (Pin 1): Receiver Output. If the receiver output is enabled
(RE low) and A > B by 200mV, then RO will be high. If A
< B by 200mV, then RO will be low. If the receiver inputs
are open, shorted, or terminated without a valid signal, RO
will be high.
RE (Pin 2): Receiver Enable. A low enables the receiver.
A high input forces the receiver output into a high imped-
ance state.
DE (Pin 3): Driver Enable. A high on DE enables the driver.
A low input will force the driver outputs into a high imped-
ance. If RE is high with DE and TE LOW, the part will enter
a low power shutdown state.
DI (Pin 4): Driver Input. If the driver outputs are enabled
(DE HIGH), then a low on DI forces the driver positive
output LOW and negative output HIGH. A high on DI,
with the driver outputs enabled, forces the driver positive
output HIGH and negative output LOW.
8
(DD/DE/GN)
TE (Pin 5): Internal Termination Resistance Enable. A high
input will connect a termination resistor (120Ω typical)
between pins A and B.
GND (Pins 6,11/6,13/6): Ground. Pins 11 and 13 are
backside thermal pad, connected to Ground.
SLO (Pins 7/7/11): Driver Slew Rate Control. A low input
will force the driver into a reduced slew rate mode.
Y (Pins -/8/12): Positive Driver Output for LTC2861.
Z (Pins -/9/13): Negative Driver Output for LTC2861.
B (Pins 9/10/14): Negative Receiver Input (and Negative
Driver Output for LTC2859).
A (Pins 8/11/15): Positive Receiver Input (and Positive
Driver Output for LTC2859).
V
Bypass with 0.1µF ceramic capacitor.
CC
(Pins 10/12/16): Positive Supply. 4.5V < V
CC
< 5.5V.
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