Datasheet

2
LTC1481
1481fa
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) ● 2.0 V
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 R = 27Ω or R = 50Ω, Figure 1 ● 3V
∆V
OC
 Change in Magnitude of Driver Common Mode R = 27Ω or R = 50Ω, Figure 1 ● 0.2 V
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 ● ±2 µA
I
IN2
Input Current (A, B) DE = 0, V
CC
= 0V or 5.25V, V
IN
= 12V ● 1.0 mA
DE = 0, V
CC
= 0V or 5.25V, 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 ● 45 mV
V
OH
Receiver Output High Voltage I
O
= –4mA, V
ID
= 200mV ● 3.5 V
V
OL
Receiver Output Low Voltage I
O
= 4mA, V
ID
= –200mV ● 0.4 V
I
OZR
Three-State (High Impedance) Output V
CC
= Max, 0.4V ≤ V
O
≤ 2.4V ● ±1 µA
Current at Receiver
R
IN
Receiver Input Resistance –7V ≤ V
CM
≤ 12V ● 12 kΩ
I
CC
Supply Current No Load, Output Enabled ● 300 500 µA
No Load, Output Disabled
● 80 120 µA
I
SHDN
Supply Current in Shutdown Mode DE = 0, RE = V
CC
110µA
I
OSD1
Driver Short-Circuit Current, V
OUT
= HIGH –7V ≤ V
O
≤ 12V ● 35 250 mA
I
OSD2
Driver Short-Circuit Current, V
OUT
= LOW –7V ≤ V
O
≤ 12V ● 35 250 mA
I
OSR
Receiver Short-Circuit Current 0V ≤ V
O
≤ V
CC
● 785mA
ORDER PART
NUMBER
LTC1481CN8
LTC1481IN8
LTC1481CS8
LTC1481IS8
(Note 1)
Supply Voltage (V
CC
) .............................................. 12V
Control Input Voltage..................... –0.5V to V
CC
+ 0.5V
Driver Input Voltage....................... –0.5V to V
CC
+ 0.5V
Driver Output Voltage ........................................... ±14V
Receiver Input Voltage.......................................... ±14V
Receiver Output Voltage ................ –0.5V to V
CC
+ 0.5V
Operating Temperature Range
LTC1481C ....................................... 0°C ≤ T
A
≤ 70°C
LTC1481I.................................... –40°C ≤ T
A
≤ 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
T
JMAX
= 125°C, θ
JA
= 130°C/ W (N8)
T
JMAX
= 125°C, θ
JA
= 150°C/ W (S8)
S8 PART MARKING
1481
1481I
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V (Notes 2, 3) unless otherwise noted.
1
2
3
4
8
7
6
5
TOP VIEW
V
CC
B
A
GND
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
R
D
RO
RE
DE
DI
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS