ltc2871fe Linear Technology Corporation, ltc2871fe Datasheet - Page 4

• Manufacturer Part Number: ltc2871fe
• Description: Ltc2870/ltc2871 - Rs232/rs485 Multiprotocol Transceivers With Integrated Termination
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
LTC2870/LTC2871
SYMBOL PARAMETER
Power Supply
V
V
RS485 Driver
|V
Δ|V
V
Δ|V
I
I
RS485 Receiver
I
R
V
V
4
OZD485
OSD485
IN485
CC
L
OC
OL
OH
IN485
OD
OD
OC
|
|
|
Supply Voltage Operating Range
Logic Supply Voltage Operating Range
V
V
(Outputs Unloaded) (Note 3)
V
(Outputs Unloaded)
Differential Output Voltage
Difference in Magnitude of Differential Output
Voltage for Complementary Output States
Common Mode Output Voltage
Difference in Magnitude of Common Mode
Output Voltage for Complementary Output
States
Three-State (High Impedance) Output Current
Maximum Short-Circuit Current
Input Current
Input Resistance
Differential Input Signal Threshold Voltage
(A-B)
Input Hysteresis
Differential Input Failsafe Threshold Voltage
Input DC Failsafe Hysteresis
Output Low Voltage
Output High Voltage
Three-State (High Impedance) Output Current
Short-Circuit Output Current
CC
CC
L
Supply Current in Transceiver Mode
Supply Current in Shutdown Mode
Supply Current in Transceiver Mode
A
CONDITIONS
V
RXEN = V
DX485 = DX232 = TE485 = FEN = H/F = 0V,
RX485 = RX232 = V
485/232 = DXEN = V
DY/DZ = 0V or V
DX485 = DX232 = V
DI/DIN1/DIN2 = 0V or V
R
R
R
R
R
R
R
V
–7V ≤ V
V
(Note 5)
V
(Note 5)
–7V ≤ (A or B) ≤ 12V (Note 5)
B = 0V (Notes 3, 5)
–7V ≤ (A or B) ≤ 12V (Note 5)
B = 0V (Note 5)
Output Low, I(RA, RO) = 3mA (Sinking),
3V ≤ V
Output Low, I(RA, RO) = 1mA (Sinking),
1.7V ≤ V
Output High, I(RA, RO) = –3mA (Sourcing),
3V ≤ V
Output High, I(RA, RO) = –1mA (Sourcing),
1.7V ≤ V
0V ≤ (RA, RO), ≤V
0V ≤ (RA, RO), ≤V
L
OUT
IN
IN
L
L
L
L
L
L
L
= 25°C. V
≤ V
= ∞, V
= 27Ω, V
= 50Ω, V
= 27Ω, V
= 50Ω, V
= 27Ω or 50Ω (Figure 1)
= 27Ω or 50Ω (Figure 1)
= 12V or –7V, V
= 12V or –7V, V
= 12V or –7V, V
CC
L
L
The
OUT
≤ 5.5V
≤ 5.5V
L
L
L
CC
< 3V
< 3V
, DXEN = TE485 = FEN = 0V, (LTC2870)
l
≤ 12V (Figure 2)
CC
CC
CC
CC
= 3V (Figure 1)
CC
denotes the specifications which apply over the full operating
= 3V (Figure 1)
= 3.13V (Figure 1)
= 3V (Figure 1)
= 3.13V (Figure 1)
= V
L
(LTC2870)
L
L
CC
CC
, V
, V
L
L
L
L
, RX485 = RX232 = 0V,
CC
= 3.3V, TE485 = 0V, LB = 0V unless otherwise noted.
(LTC2871)
, RXEN = 0V,
L
L
= 0V or 3.3V (Figure 3)
= 0V or 3.3V (Figure 3)
= 5.5V
= 5.5V
L
= 0V or 3.3V (Figure 2)
(LTC2871)
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
V
V
L
L
–100
–250
–100
–200
MIN
1.7
1.5
1.5
96
– 0.4
– 0.4
3
2
TYP
125
130
–50
3.3
25
8
0
0
±200
±125
MAX
V
V
V
125
250
125
5.5
0.2
0.2
0.2
0.4
0.4
60
±5
5
6
3
0
CC
CC
CC
UNITS
28701f
mA
mA
mV
mV
mV
mV
mA
kΩ
μA
μA
μA
μA
μA
V
V
V
V
V
V
V
V
V
V
V
V
V