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LTC1485 数据表(PDF) 8 Page - Linear Technology

部件名 LTC1485
功能描述  20Mbps RS485 Transceivers
Download  18 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC1485 数据表(HTML) 8 Page - Linear Technology

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LTC2859/LTC2861
8
285961fc
RO(Pin1):ReceiverOutput.Ifthereceiveroutputisenabled
(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.
(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).
VCC (Pins 10/12/16): Positive Supply. 4.5V < VCC < 5.5V.
Bypass with 0.1µF ceramic capacitor.
pin FuncTions


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