Datasheet

LTC2870/LTC2871
2
28701f
LTC2870 LTC2870
9 10
TOP VIEW
29
V
EE
UFD PACKAGE
28-LEAD (4mm s 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
V
EE
RA
RB
485/232
RXEN
DXEN
DY
DZ
A
B
V
CC
Y
GND
Z
V
CC
V
DD
TE485 H/F LB V
L
V
CC
GND
FEN
GND
CAP
V
EE
GND
SW
7
17
18
19
20
21
22
16
8
15
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 29) IS V
EE
,
MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
FE PACKAGE
28-LEAD PLASTIC TSSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
LB
H/F
TE485
V
EE
RA
RB
485/232
RXEN
DXEN
DY
DZ
FEN
GND
CAP
V
L
V
CC
GND
A
B
V
CC
Y
GND
Z
V
CC
V
DD
SW
GND
V
EE
29
V
EE
T
JMAX
= 125°C, θ
JA
= 25°C/W
EXPOSED PAD (PIN 29) IS V
EE
,
MUST BE SOLDERED TO PCB
ABSOLUTE MAXIMUM RATINGS
Input Supplies
V
CC
, V
L
..................................................... –0.3V to 7V
Generated Supplies
V
DD
................................................V
CC
– 0.3V to 7.5V
V
EE
.........................................................0.3V to –7.5V
V
DD
– V
EE
..............................................................15 V
SW ........................................... –0.3V to (V
DD
+ 0.3V)
CAP ............................................. 0.3V to (V
EE
– 0.3V)
A, B, Y, Z, RIN1, RIN2, DOUT1, DOUT2 ........–15V to 15V
DI, DZ, DY, RXEN, DXEN, LB, H/F, TE485, RX485,
DX485, RX232, DX232, DIN1, DIN2,
485/232, CH2. .......................................... –0.3V to 7V
(Notes 1 and 2)
PIN CONFIGURATION
FEN, RA, RB, RO, ROUT1, ROUT2 ...–0.3V to (V
L
+ 0.3V)
Differential Enabled Terminator Voltage
(A-B or Y-Z) ..........................................................±6V
Operating Temperature
LTC2870C/LTC2871C ............................... 0°C to 70°C
LTC2870I/LTC2871I .............................–40°C to 85°C
Storage Temperature Range .................. –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
FE package........................................................300°C