Datasheet

2
LTC1688/LTC1689
16889fa
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
)................................................ 7V
Enable Input Voltages ................. –0.5V to (V
DD
+ 0.5V)
Enable Input Currents ..................... –100mA to 100mA
Driver Input Voltages .................. –0.5V to (V
DD
+ 0.5V)
Driver Output Voltages ................. (–12V + V
DD
) to 12V
Driver Input Currents ...................... –100mA to 100mA
Short-Circuit Duration (V
OUT
: –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
DC ELECTRICAL CHARACTERISTICS
ORDER PART
NUMBER
LTC1688CS
LTC1689CS
LTC1688IS
LTC1689IS
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
*LTC1689 ONLY
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
DI1
DO1A
DO1B
EN (EN12*)
DO2B
DO2A
DI2
GND
V
DD
DI4
DO4A
DO4B
ENB (EN34*)
DO3B
DO3A
DI3
T
JMAX
= 150°C, θ
JA
= 90°C/W
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
Consult factory for parts specified with wider operating temperature ranges.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
= 5V, Per Driver, T
A
= 25 ° C, Unless Otherwise Noted (Note 2)
V
OD1
Differential Driver Output (Unloaded) I
OUT
= 0 ● V
DD
V
V
OD2
Differential Driver Output (With Load) R = 50Ω (RS422) ● 2V
R = 25Ω (RS485), Figure 1 ● 1.5 3.0 V
∆V
OD
Change in Magnitude of Driver Differential R = 25Ω or 50Ω, Figure 1 ● 0.2 V
Output Voltage for Complementary
Output States
V
OC
Driver Common Mode Output Voltage R = 25Ω or 50Ω, Figure 1 ● 23V
∆V
OC
 Change in Magnitude of Driver Common R = 25Ω or 50Ω, Figure 1 ● 0.2 V
Mode Output Voltage for Complementary
Output States
V
IH
Input High Voltage EN, ENB, EN12, EN34, DI ● 2V
V
IL
Input Low Voltage EN, ENB, EN12, EN34, DI ● 0.8 V
I
IN1
Input Current EN, ENB, EN12, EN34, DI ● ±1 µA
I
OZ
Three-State (High Impedance) V
OUT
= –7V to 12V ● ±2 ±200 µA
Output Current
I
DD
Supply Current of Entire Device No Load, Digital Input Pins = 0V or V
DD
● 918 mA
I
OSD1
Driver Short-Circuit Current, V
OUT
= HIGH V
OUT
= –7V to 10V ● ±20 mA
I
OSD2
Driver Short-Circuit Current, V
OUT
= LOW V
OUT
= –7V to 10V ● ±20 mA
V
DD
= 3V, Per Driver, T
A
= 25 ° C, Unless Otherwise Noted (Note 2)
V
OD1
Differential Driver Output (Unloaded) I
OUT
= 0 ● V
DD
V
V
OD2
Differential Driver Output (With Load) R = 50Ω (RS422) 1.5 V
R = 25Ω (RS485), Figure 1
● 0.65 2.0 V
∆V
OD
Change in Magnitude of Driver Differential R = 25Ω or 50Ω, Figure 1 0.1 V
Output Voltage for Complementary
Output States
V
OC
Driver Common Mode Output Voltage R = 25Ω or 50Ω, Figure 1 1.3 V