LTC491
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
NC
R
REB
DE
D
GND
GND
1
2
3
4
5
D
6
7
9
8
Y
NC
R
14 V
CC
13 NC
12 A
11 B
10 Z
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
ORDER PART
NUMBER
LTC491CN
LTC491CS
LTC491IN
LTC491IS
N PACKAGE
14-LEAD PDIP
S PACKAGE
14-LEAD PLASTIC SO
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
SYMBOL
V
OD1
V
OD2
∆V
OD
V
OC
∆
V
OC
V
IH
V
IL
l
IN1
l
IN2
V
TH
∆V
TH
V
OH
V
OL
I
OZR
I
CC
R
IN
I
OSD1
I
OSD2
I
OSR
I
OZ
PARAMETER
Differential Driver Output Voltage (Unloaded)
Differential Driver Output Voltage (With load)
Change in Magnitude of Driver Differential Output
Voltage for Complementary Output States
Driver Common Mode Output Voltage
Change in Magnitude of Driver Common Mode
Output Voltage for Complementary Output States
Input High Voltage
Input Low Voltage
Input Current
Input Current (A, B)
Differential Input Threshold Voltage for Receiver
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State Output Current at Receiver
Supply Current
Receiver Input Resistance
Driver Short Circuit Current, V
OUT
= High
Driver Short Circuit Current, V
OUT
= Low
Receiver Short Circuit Current
Driver Three-State Output Current
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V
±5%
CONDITIONS
I
O
= 0
R = 50Ω; (RS422)
R = 27Ω; (RS485) (Figure 1)
R = 27Ω or R = 50Ω (Figure 1)
q
q
q
q
q
q
MIN
2
1.5
TYP
MAX
5
5
0.2
3
0.2
UNITS
V
V
V
V
V
V
V
D, DE, REB
q
q
q
2.0
0.8
±2
1.0
– 0.8
– 0.2
70
3.5
0.4
±1
300
300
12
100
100
7
±2
250
250
85
±200
500
500
0.2
V
CC
= 0V or 5.25V
– 7V
≤
V
CM
≤
12V
V
CM
= 0V
V
IN
= 12V
V
IN
= –7V
q
q
q
q
q
q
q
q
q
q
q
q
q
q
I
O
= –4mA, V
ID
= 0.2V
I
O
= 4mA, V
ID
= –0.2V
V
CC
= Max 0.4V
≤
V
O
≤
2.4V
No Load; D = GND,
or V
CC
– 7V
≤
V
CM
≤
12V
V
O
= – 7V
V
O
= 12V
0V
≤
V
O
≤
V
CC
V
O
= – 7V to 12V
Outputs Enabled
Outputs Disabled
2
U
V
µA
mA
mA
V
mV
V
V
µA
µA
µA
kΩ
mA
mA
mA
µA
491fa
W
U
U
W W
W
LINER [ LINEAR TECHNOLOGY ]
