Datasheet

2
LTC1685
WU
U
PACKAGE
/
O
RDER I FOR ATIO
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
(Note 1)
Supply Voltage (V
DD
).............................................. 10V
Control Input Currents .................... –100mA to 100mA
Control Input Voltages .................. –0.5V to V
DD
+ 0.5V
Driver Input Voltages .................... –0.5V to V
DD
+ 0.5V
Driver Output Voltages .................................. +12V/–7V
Receiver Input Voltages ................................. +12V/–7V
Receiver Output Voltages ............. –0.5V to V
DD
+ 0.5V
Receiver Input Differential ...................................... 10V
Short-Circuit Duration (Driver V
OUT
: –7V to 10V,
Receiver V
OUT
: 0V to V
DD
) ............................... Indefinite
Operating Temperature Range
LTC1685C ............................................... 0°C to 70°C
LTC1685I............................................. –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
1
2
3
4
8
7
6
5
TOP VIEW
V
DD
B
A
GND
S8 PACKAGE
8-LEAD PLASTIC SO
RO
RE
DE
DI
R
D
T
JMAX
= 125°C, θ
JA
= 150°C/W
Consult factory for Military grade parts.
S8 PART MARKING
DC ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OD1
Differential Driver Output (Unloaded) I
OUT
= 0 ● V
DD
V
V
OD2
Differential Driver Output (With Load) R = 50Ω (RS422) 2 V
R = 27Ω (RS485), Figure 1
● 1.5 V
DD
V
∆V
OD
Change in Magnitude of Driver Differential R = 27Ω or 50Ω, Figure 1 ● 0.2 V
Output Voltage for Complementary
Output States
V
OC
Driver Common Mode Output Voltage R = 27Ω or 50Ω, V
DD
= 5V, Figure 1 ● 23V
∆V
OC
 Change in Magnitude of Driver Common R = 27Ω or 50Ω, Figure 1 ● 0.2 V
Mode Output Voltage for Complementary
Output States
V
IH
Input High Voltage DE, DI, RE ● 2V
V
IL
Input Low Voltage DE, DI, RE ● 0.8 V
I
IN1
Input Current DE, DI, RE ● –1 1 µA
I
IN2
Input Current (A, B) V
A
, V
B
= 12V, DE = 0, V
DD
= 0V or 5.25V ● 500 µA
V
A
, V
B
= –7V, DE = 0, V
DD
= 0V or 5.25V ● –500 µA
V
TH
Differential Input Threshold Voltage –7V ≤ V
CM
≤ 12V ● –0.3 0.3 V
for Receiver
∆V
TH
Receiver Input Hysteresis V
CM
= 0V 25 mV
V
OH
Receiver Output High Voltage I
OUT
= –4mA, V
ID
= 300mV ● 3.5 4.8 V
V
OL
Receiver Output Low Voltage I
OUT
= 4mA, V
ID
= –300mV ● 0.4 V
I
OZR
Three-State (High Impedance) Output 0.4V ≤ V
OUT
≤ 2.4V ● –1 1 µA
Current at Receiver
I
DD
Supply Current No Load, Pins 2, 3, 4 = 0V or V
DD
● 712 mA
I
OSD1
Driver Short-Circuit Current, V
OUT
= HIGH V
OUT
= –7V or 10V (Note 5) ● 20 mA
LTC1685CS8
LTC1685IS8
1685
1685I
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 5V ± 5%, unless otherwise noted. (Notes 2, 3)