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LTC2871IUHFPBF Datasheet(PDF) 5 Page - Linear Technology

Part # LTC2871IUHFPBF
Description  RS232/RS485 Multiprotocol Transceivers with Integrated Termination
Download  36 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2871IUHFPBF Datasheet(HTML) 5 Page - Linear Technology

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LTC2870/LTC2871
5
28701f
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = VL = 3.3V, TE485 = 0V, LB = 0V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RTERM
Terminating Resistor
TE485 = VL, A – B = 2V, B = –7V, 0V, 10V
(Figure 8) (Note 5)
l
108
120
156
Ω
RS232 Driver
VOLD
Output Low Voltage
RL = 3kΩ; VEE ≤ –5.9V
l
–5
–5.7
–7.5
V
VOHD
Output High Voltage
RL = 3kΩ; VDD ≥ 6.5V
l
5
6.2
7.5
V
Three-State (High Impedance) Output Current
Y or Z (LTC2870) = ±15V
RS232 Receiver Enabled
DOUT1 or DOUT2 (LTC2871) = ±15V
l
l
±156
±10
μA
μA
Output Short-Circuit Current
Driver Output = 0V
l
±35
±90
mA
RS232 Receiver
Input Threshold Voltage
l
0.6
1.5
2.5
V
Input Hysteresis
l
0.1
0.4
1.0
V
Output Low Voltage
I(RA, RB, ROUT1, ROUT2) = 1mA (Sinking)
1.7V ≤ VL ≤ 5.5V
l
0.4
V
Output High Voltage
I(RA, RB, ROUT1, ROUT2) = –1mA (Sourcing)
1.7V ≤ VL ≤ 5.5V
l VL – 0.4
V
Input Resistance
–15V ≤ (A, B, RIN1, RIN2) ≤ 15V,
RS232 Receiver Enabled
l
35
7
Three-State (High Impedance) Output Current
0V ≤ (RA, RB, ROUT1, ROUT2) ≤ VL
l
0±5
μA
Output Short-Circuit Current
VL = 5.5V
0V ≤ (RA, RB, ROUT1, ROUT2) ≤ VL
l
±25
±50
mA
Logic Inputs
Threshold Voltage
l
0.4
0.75 • VL
V
Input Current
l
0±5
μA
Power Supply Generator
VDD
Regulated VDD Output Voltage
RS232 Drivers Enabled, Outputs Loaded with
RL = 3kΩ to GND, DIN1/DY = VL, DIN2/DZ = 0V
(Note 3)
7V
VEE
Regulated VEE Output Voltage
–6.3
V
ESD
LTC2870 Interface Pins (A, B, Y, Z)
Human Body Model to GND or VCC, Powered or
Unpowered (Note 7)
±26
kV
LTC2871 Interface Pins (A, B, Y, Z, RIN1, RIN2,
DOUT1, DOUT2)
±16
kV
All Other Pins
Human Body Model (Note 7)
±4
kV


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