LTC1688/LTC1689
W W W
U
W
U
ABSOLUTE AXI U RATI GS
/O
PACKAGE RDER I FOR ATIO
(Note 1)
Supply Voltage (VDD)................................................ 7V
Enable Input Voltages ................. –0.5V to (VDD + 0.5V)
Enable Input Currents ..................... –100mA to 100mA
Driver Input Voltages .................. –0.5V to (VDD + 0.5V)
Driver Output Voltages ................. (–12V + VDD) to 12V
Driver Input Currents ...................... –100mA to 100mA
Short-Circuit Duration (VOUT: –7V to 10V) ...... Indefinite
Operating Temperature Range
LTC1688C/LTC1689C ............................. 0°C to 70°C
LTC1688I/LTC1689I .......................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
TOP VIEW
ORDER PART
NUMBER
DI1
DO1A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
DD
DI4
LTC1688CS
LTC1689CS
LTC1688IS
LTC1689IS
DO1B
DO4A
DO4B
ENB (EN34*)
DO3B
DO3A
DI3
EN (EN12*)
DO2B
DO2A
DI2
GND
S PACKAGE
16-LEAD PLASTIC SO
*LTC1689 ONLY
TJMAX = 150°C, θJA = 90°C/ W
Consult factory for parts specified with wider operating temperature ranges.
DC ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
SYMBOL PARAMETER
CONDITIONS
= 5V, Per Driver, T = 25°C, Unless Otherwise Noted (Note 2)
A
MIN
TYP
MAX
UNITS
V
V
V
DD
Differential Driver Output (Unloaded)
Differential Driver Output (With Load)
I
= 0
●
V
DD
V
OD1
OD2
OUT
R = 50Ω (RS422)
R = 25Ω (RS485), Figure 1
●
●
2
1.5
V
V
3.0
0.2
∆V
OD
Change in Magnitude of Driver Differential
Output Voltage for Complementary
Output States
R = 25Ω or 50Ω, Figure 1
●
V
V
Driver Common Mode Output Voltage
R = 25Ω or 50Ω, Figure 1
R = 25Ω or 50Ω, Figure 1
●
●
2
2
3
V
V
OC
∆ V
Change in Magnitude of Driver Common
Mode Output Voltage for Complementary
Output States
0.2
OC
V
V
Input High Voltage
Input Low Voltage
Input Current
EN, ENB, EN12, EN34, DI
EN, ENB, EN12, EN34, DI
EN, ENB, EN12, EN34, DI
●
●
●
●
V
V
IH
IL
0.8
±1
I
I
µA
µA
IN1
OZ
Three-State (High Impedance)
Output Current
V
= –7V to 12V
±2
±200
OUT
I
I
I
Supply Current of Entire Device
No Load, Digital Input Pins = 0V or V
●
●
●
9
18
mA
mA
mA
DD
DD
Driver Short-Circuit Current, V
Driver Short-Circuit Current, V
= HIGH
= LOW
V
V
= –7V to 10V
= –7V to 10V
±
±
20
20
OSD1
OSD2
OUT
OUT
OUT
OUT
V
V
V
= 3V, Per Driver, T = 25°C, Unless Otherwise Noted (Note 2)
A
DD
Differential Driver Output (Unloaded)
Differential Driver Output (With Load)
I
= 0
●
●
V
V
OD1
OD2
OUT
DD
R = 50Ω (RS422)
R = 25Ω (RS485), Figure 1
1.5
0.1
V
V
0.65
2.0
∆V
Change in Magnitude of Driver Differential
Output Voltage for Complementary
Output States
R = 25Ω or 50Ω, Figure 1
V
OD
V
Driver Common Mode Output Voltage
R = 25Ω or 50Ω, Figure 1
1.3
V
OC
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