LTC1685I Ver la hoja de datos (PDF) - Linear Technology
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LTC1685I Datasheet PDF : 12 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC1685
Receiver Propagation Delay
vs Temperature
25
20
15
10
5
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1680 G09
Receiver Maximum Data Rate
vs Input Overdrive
70
TA = 25°C
60
50
40
30
20
10
0
0.3 0.4 0.5 0.6 0.7 1.0 1.5 2.5
RECEIVER INPUT DIFFERENTIAL (V)
1685 G10
Driver Propagation Delay
vs Temperature
25
20
15
10
5
0
– 40 – 20
0 20 40 60
TEMPERATURE (°C)
80 100
1685 G07
Driver Propagation Delay
vs Driver Input Voltage
25
VDD = 5V
INPUT THRESHOLD = 1.5V
20 TA = 25°C
tHL
tLH
15
10
5
Driver Propagation Delay
vs Capacitive Load
19.0
TA = 25°C
18.5
18.0
17.5
17.0
16.5
0
2.5 3.0 3.5 4.0 4.5 5.0
DRIVER INPUT VOLTAGE (V)
1685 G08
16.0
5
15 25 50 75 100 150
LOAD CAPACITANCE (pF)
1685 G11
PIN FUNCTIONS
RO (Pin 1): Receiver Output. If A ≥ B by 300mV, then RO
will be high. If A ≤ B by 300mV, then RO will be low.
RE (Pin 2): Receiver Enable. RE = Low enables the
receiver. RE = High forces receiver output into high
impedance state. Do not float.
DE (Pin 3): Driver Enable. DE = High enables the driver.
DE = Low will force the driver output into a high impedance
state and the device will function as a line receiver if RE is
also low. Do not float.
DI (Pin 4): Driver Input. Controls the states of the A and
B outputs only if DE = High. If DE = Low, DI will have no
effect on A and B pins. Do not float.
GND (Pin 5): Ground.
A (Pin 6): Noninverting Receiver Input/Driver Output.
B (Pin 7): Inverting Receiver Input/Driver Output.
VDD (Pin 8): Positive Supply, 5V to ±5%. Bypass with
0.1µF ceramic capacitor.
5
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