Datasheet

LTC491
2
491fa
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART
NUMBER
LTC491CN
LTC491CS
LTC491IN
LTC491IS
(Note 1)
Supply Voltage (V
CC
) ............................................... 12V
Control Input Voltages .................... –0.5V to V
CC
+ 0.5V
Control Input Currents .......................... –50mA to 50mA
Driver Input Voltages ...................... –0.5V to V
CC
+ 0.5V
Driver Input Currents ............................ –25mA to 25mA
Driver Output Voltages .......................................... ±14V
Receiver Input Voltages ......................................... ±14V
Receiver Output Voltages ............... –0.5V to V
CC
+ 0.5V
Operating Temperature Range
LTC491C ................................................. 0°C to 70°C
LTC491I.............................................. –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V ±5%
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OD1
Differential Driver Output Voltage (Unloaded) I
O
= 0 ● 5V
V
OD2
Differential Driver Output Voltage (With load) R = 50Ω; (RS422) ● 2V
R = 27Ω; (RS485) (Figure 1) ● 1.5 5 V
∆V
OD
Change in Magnitude of Driver Differential Output R = 27Ω or R = 50Ω (Figure 1) ● 0.2 V
Voltage for Complementary Output States
V
OC
Driver Common Mode Output Voltage ● 3V
∆ V
OC
 Change in Magnitude of Driver Common Mode ● 0.2 V
Output Voltage for Complementary Output States
V
IH
Input High Voltage D, DE, REB ● 2.0 V
V
IL
Input Low Voltage ● 0.8 V
l
IN1
Input Current ● ±2 µA
l
IN2
Input Current (A, B) V
CC
= 0V or 5.25V V
IN
= 12V ● 1.0 mA
V
IN
= –7V ● –0.8 mA
V
TH
Differential Input Threshold Voltage for Receiver –7V ≤ V
CM
≤ 12V ● –0.2 0.2 V
∆V
TH
Receiver Input Hysteresis V
CM
= 0V ● 70 mV
V
OH
Receiver Output High Voltage I
O
= –4mA, V
ID
= 0.2V ● 3.5 V
V
OL
Receiver Output Low Voltage I
O
= 4mA, V
ID
= –0.2V ● 0.4 V
I
OZR
Three-State Output Current at Receiver V
CC
= Max 0.4V ≤ V
O
≤ 2.4V ● ±1 µA
I
CC
Supply Current No Load; D = GND, Outputs Enabled ● 300 500 µA
or V
CC
Outputs Disabled ● 300 500 µA
R
IN
Receiver Input Resistance –7V ≤ V
CM
≤ 12V ● 12 kΩ
I
OSD1
Driver Short Circuit Current, V
OUT
= High V
O
= –7V ● 100 250 mA
I
OSD2
Driver Short Circuit Current, V
OUT
= Low V
O
= 12V ● 100 250 mA
I
OSR
Receiver Short Circuit Current 0V ≤ V
O
≤ V
CC
● 785mA
I
OZ
Driver Three-State Output Current V
O
= –7V to 12V ● ±2 ±200 µA
14
13
12
11
10
9
87
6
5
4
3
2
1
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
NC
N PACKAGE
14-LEAD PDIP
Y
NC
Z
B
NC
V
CC
D
GND
GND
R
REB
DE
A
R
D
T
JMAX
= 100°C, θ
JA
= 90°C/W (N)
T
JMAX
= 100°C, θ
JA
= 110°C/W (S)
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DC ELECTRICAL CHARACTERISTICS