
2
LTC2844
sn2844 2844fs
ORDER PART
NUMBER
(Note 1)
Supply Voltage
VCC ....................................................... –0.3V to 6.5V
VIN ..................................................................... –0.3V to 6.5V
VEE ...................................................................... –10V to 0.3V
VDD ..................................................................... – 0.3V to 10V
Input Voltage
Transmitters ............................ – 0.3V to (VCC + 0.3V)
Receivers ................................................– 18V to 18V
Logic Pins ............................... – 0.3V to (VCC + 0.3V)
Output Voltage
Transmitters .................. (VEE – 0.3V) to (VDD + 0.3V)
Receivers ................................. – 0.3V to (VIN + 0.3V)
Short-Circuit Duration
Transmitter Output ...................................... Indefinite
Receiver Output ........................................... Indefinite
VEE................................................................... 30 sec
Operating Temperature Range
LTC2844CG ............................................. 0
°C to 70°C
LTC2844IG ......................................... – 40
°C to 85°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
LTC2844CG
LTC2844IG
TJMAX = 125°C, θJA = 90°C/ W, θJC = 35°C/ W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The q denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at TA = 25°C. VCC = 5V, VIN = 3.3V, VDD = 8V, VEE = – 7V for V.28, – 5.5V for V.10, V.11
(Notes 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supplies
ICC
VCC Supply Current (DCE Mode,
RS530, RS530-A, X.21 Modes, No Load
2.7
mA
All Digital Pins = GND or VIN)
RS530, RS530-A, X.21 Modes, Full Load
q
95
120
mA
V.28 Mode, No Load
q
12
mA
V.28 Mode, Full Load
q
12
mA
No-Cable Mode
q
600
1200
A
IEE
VEE Supply Current (DCE Mode Unless
RS530, RS530-A, X.21 Modes, No Load
1.6
mA
Otherwise Noted, All Digital Pins = GND or VIN) RS530, X.21 Modes, Full Load (DTE Mode)
14
mA
RS530-A, Full Load (DTE Mode)
25
mA
V.28 Mode, No Load
1
mA
V.28 Mode, Full Load
7.5
mA
No-Cable Mode
10
A
IDD
VDD Supply Current (DCE Mode,
RS530, RS530-A, X.21 Modes, No Load
0.2
mA
All Digital Pins = GND or VIN)
RS530, RS530-A, X.21 Modes, Full Load
0.2
mA
V.28 Mode, No Load
1
mA
V.28 Mode, Full Load
8
mA
No-Cable Mode
10
A
IVIN
VIN Supply Current (DCE Mode,
All Modes Except No-Cable Mode
490
A
All Digital Pins = GND or VIN)
ABSOLUTE
AXI U
RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS
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
VCC
VDD
D1
D2
D3
R1
R2
R3
D4
R4
M0
M1
M2
DCE/DTE
VEE
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
VIN
R1
D2
D1
R2
D3
G PACKAGE
28-LEAD PLASTIC SSOP
R3
D4
R4