LTC2803 LINER [Linear Technology], LTC2803 Datasheet - Page 7

• Manufacturer Part Number: LTC2803
• Description: Multiprotocol Transceiver
• Manufacturer: LINER [Linear Technology]

Typical perForMance characTerisTics
5V/DIV
1V/DIV
5V/DIV
80
70
60
50
40
6
5
4
3
2
1
0
–50
0
H/F HIGH
Y, Z LOADS: 120Ω (DIFF) + 50pF
RS485 Receiver Propagation
Delay vs Temperature
RS232 Receiver Output Voltage
vs Load Current
RS485 Operation at 20Mbps
–25
DY
V
V
V
V
2
CC
CC
CC
CC
OUTPUT CURRENT (mA)
Z
Y
= 3.3V, V
= 5V, V
= 3.3V, V
= 5V, V
TEMPERATURE (°C)
0
4
L
L
20ns/DIV
L
= 1.7V
L
= 5V
25
= 1.7V
= 3.3V
RA
6
50
V
V
V
8
75
L
L
L
= 5V
= 3.3V
= 1.7V
2872 G10
2872 G13
2872 G16
100
10
5V/DIV
130
128
126
124
122
120
118
116
114
112
110
6
5
4
3
2
1
0
–50
0
RS485 Receiver Output Voltage
vs Load Current
RS485 Termination Resistance
vs Temperature
RS232 Driver Outputs Enabling
and Disabling
–25
DXEN
V
V
V
2
CM
CM
CM
OUTPUT CURRENT (mA)
Y
Z
= –7V
= 2V
= 12V
TEMPERATURE (°C)
0
4
40ns/DIV
25
Y
Z
6
50
FEN = VL
FEN = 0V
V
V
V
8
L
L
L
75
= 5V
= 3.3V
= 1.7V
2872 G11
2872 G14
2872 G17
100
10
5V/DIV
2V/DIV
5V/DIV
2.0
1.8
1.6
1.4
1.2
1.0
–50
RS232 Operation at 500kbps
RS232 Receiver Input Threshold
vs Temperature
WRAPPING DATA
DOUT LOADS: 5kΩ + 50pF
V
DD
DY
DZ
–25
and V
FEN
Z
Y
RA
RB
TEMPERATURE (°C)
EE
0
Powering Up
100µs/DIV
1µs/DIV
LTC2872
25
50
INPUT HIGH
V
V
INPUT LOW
DD
EE
V
V
CC
CC
75
= 5V
= 3.3V
2872 G12
2872 G15
2872 G18
7
2872f
100