LTC2859/LTC2861
3
285961fc
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
CC
= 5V unless otherwise noted (Note 2).
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Driver
|V
OD
| Differential Driver Output Voltage R = ∞, I
O
= 0mA, V
CC
= 4.5V (Figure 1)
R = 27Ω (RS485), V
CC
= 4.5V (Figure 1)
R = 50Ω (RS422), V
CC
= 4.5V (Figure 1)
l
l
l
1.5
2.0
V
CC
V
CC
V
CC
V
V
V
D|V
OD
|
Change in Magnitude of Driver
Differential Output Voltage for
Complementary Output States
R = 27Ω or R = 50Ω (Figure 1)
l
0.2 V
V
OC
Driver Common Mode Output Voltage R = 27Ω or R = 50Ω (Figure 1)
l
3.0 V
D|V
OC
|
Change in Magnitude of Driver
Common Mode Output Voltage for
Complementary Output States
R = 27Ω or R = 50Ω (Figure 1)
l
0.2 V
I
OZD
Driver Three-State (High Impedance)
Output Current on Y and Z
DE = OV, V
O
= –7V, +12V
(LTC2861 Only)
l
±10 µA
I
OSD
Maximum Driver Short-Circuit Current –7V ≤ (Y or Z) ≤ 12 (Figure 2)
l
±120 ±250 mA
Receiver
I
IN2
Receiver Input Current (A, B) DE = TE = 0V, V
CC
= 0V or 5V, V
A
or V
B
= 12V,
Other at 0V
(H-Grade)
l
l
125
250
µA
µA
DE = TE = 0V, V
CC
= 0V or 5V, V
A
or V
B
= –7V,
Other at 0V
(H-Grade)
l
l
–100
–145
µA
µA
V
TH
Receiver Differential Input Threshold
Voltage
–7V ≤ V
CM
≤ 12
l
±0.2 V
DV
TH
Receiver Input Hysteresis V
CM
= 0V
25 mV
V
OH
Receiver Output HIGH Voltage I
0
= –4mA, V
ID
= 200mV, V
CC
= 4.5V
l
2.4 V
V
OL
Receiver Output LOW Voltage I
0
= 4mA, V
ID
= –200mV, V
CC
= 4.5V
l
0.4 V
I
OZR
Receiver Three-State (High
Impedance) Output Current on RO
RE = 5V, 0V ≤ V
O
≤ V
CC
l
±1 µA
R
IN
Receiver Input Resistance RE = 5V or 0V, DE = TE = 0V
–7V ≤ V
A
= V
B
≤ 12V
(H-Grade)
l
l
96
48
125
125
kΩ
kΩ
R
TERM
Receiver Input Terminating Resistor TE = 5V, V
AB
= 2V, V
B
= –7, 0, 10V
(Figure 7)
l
108 120 156 Ω
Logic
V
IH
Logic Input High Voltage DE, DI, RE, TE, SLO, V
CC
= 4.5V
l
2 V
V
IL
Logic Input Low Voltage DE, DI, RE, TE, SLO, V
CC
= 4.5V
l
0.8 V
I
IN1
Logic Input Current DE, DI, RE, TE, SLO
l
0 ±10 µA
Supplies
I
SHDN
Supply Current in Shutdown Mode DE = 0V, RE = V
CC
, TE = 0V
l
0 5 µA
I
CCR
Supply Current in Receive Mode No Load, DE = 0V, RE = 0V, TE = 0V
l
540 900 µA
I
CCT
Supply Current in Transmit Mode No Load, DE = V
CC
, RE = V
CC
, SLO = V
CC
, TE = 0V
l
630 1000 µA
I
CCTS
Supply Current in Transmit SLO Mode No Load, DE = V
CC
, RE = V
CC
, SLO = 0V, TE = 0V
l
670 1100 µA
I
CCL
Supply Current in Loopback Mode
(Both Driver and Receiver Enabled)
No Load, DE = V
CC
, RE= 0V, SLO = V
CC
, TE = 0V
l
660 1100 µA
I
CCRT
Supply Current in Termination Mode DE = 0V, RE = V
CC
, TE = V
CC
, SLO = V
CC
l
640 1180 µA
elecTrical characTerisTics
