Datasheet
2
LTC1544
ORDER PART
NUMBER
(Note 1)
Supply Voltage, V
CC
................................................ 6.5V
Input Voltage
Transmitters ........................... –0.3V to (V
CC
+ 0.3V)
Receivers............................................... –18V to 18V
Logic Pins .............................. –0.3V to (V
CC
+ 0.3V)
Output Voltage
Transmitters .................. (V
EE
– 0.3V) to (V
DD
+ 0.3V)
Receivers................................ –0.3V to (V
CC
+ 0.3V)
V
EE
........................................................ –10V to 0.3V
V
DD
....................................................... –0.3V to 10V
Short-Circuit Duration
Transmitter Output ..................................... Indefinite
Receiver Output.......................................... Indefinite
V
EE
.................................................................. 30 sec
Operating Temperature Range
LTC1544CG ............................................. 0°C to 70°C
LTC1544IG ........................................ –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
LTC1544CG
LTC1544IG
T
JMAX
= 150°C, θ
JA
= 65°C/W
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
V
DD
D1
D2
D3
R1
R2
R3
D4
R4
M0
M1
M2
DCE/DTE
V
EE
GND
D1 A
D1 B
D2 A
D2 B
D3/R1 A
D3/R1 B
R2 A
R2 B
R3 A
R3 B
D4/R4 A
INVERT
R1
D2
D1
R2
D3
G PACKAGE
28-LEAD PLASTIC SSOP
R3
D4
R4
Consult factory for Military grade parts.
The ● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, V
DD
= 8V, V
EE
= – 7V for V.28, – 5.5V for V.10, V.11 (Notes 2, 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
I
CC
V
CC
Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load 2.7 mA
All Digital Pins = GND or V
CC
) RS530, RS530-A, X.21 Modes, Full Load ● 95 120 mA
V.28 Mode, No Load
● 12 mA
V.28 Mode, Full Load
● 12 mA
No-Cable Mode
● 10 200 µA
I
EE
V
EE
Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, No Load 2.1 mA
All Digital Pins = GND or V
CC
) RS530, X.21 Modes, Full Load 14 mA
V
EE
= –5.6V (RS530, RS530-A Modes) RS530-A, Full Load 25 mA
V
EE
= –8.46V (V.28 Mode) V.28 Mode, No Load 1 mA
V.28 Mode, Full Load 12 mA
No-Cable Mode 10 µA
I
DD
V
DD
Supply Current (DCE Mode, RS530, RS530-A, X.21 Modes, NoLoad 0.2 mA
All Digital Pins = GND or V
CC
) RS530, RS530-A, X.21 Modes, Full Load 0.2 mA
V
DD
= 8.73V V.28 Mode, No Load 1 mA
V.28 Mode, Full Load 12 mA
No-Cable Mode 10 µA
P
D
Internal Power Dissipation (DCE Mode, RS530, RS530-A, X.21 Modes, Full Load 300 mW
(All Digital Pins = GND or V
CC
) V.28 Mode, Full Load 54 mW
ABSOLUTE AXI U RATI GS
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PACKAGE/ORDER I FOR ATIO
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ELECTRICAL CHARACTERISTICS