LTC1347 Linear Technology, LTC1347 Datasheet - Page 4

• Manufacturer Part Number: LTC1347
• Description: 5V Low Power RS232 3-Driver/5-Receiver Transceiver with 5 Receivers Active in Shutdown
• Manufacturer: Linear Technology

PI FU CTIO S
LTC1347
TYPICAL PERFORMANCE CHARACTERISTICS
V
in the Shutdown mode. This pin should be decoupled with
a 0.1 F ceramic capacitor.
GND: Ground Pin.
ON/OFF: TTL/CMOS Compatible Shutdown Pin. A logic
low puts the device in the shutdown mode with all receiv-
ers kept alive, and the supply current is 80 A. All driver
outputs are in high impedance state. This pin cannot float.
V
V
4
CC
+
+
20
16
14
12
10
: Positive Supply Output (RS232 Drivers).
60
50
40
30
20
10
U
8
6
4
2
0
: 5V Input Supply Pin. Supply current is typically 80 A
–40
0
2V
Receiver Short-Circuit Current
V
CC
CC
–20
10
Supply Current
U
– 1V. This pin requires an external capacitor C
3 DRIVERS LOADED
20
1 DRIVER LOADED
TEMPERATURE (°C)
0
TEMPERATURE (°C)
I
SC
R
+
R
30
20
L
L
= 3k
= 3k
U
40
40
I
SC
–
50
60
W
60
80
1347 G04
1347 G07
U
100
70
C
L
= 2500pF
OUTPUT
OUTPUT
DRIVER
DRIVER
R
R
INPUT
L
L
= 3k
= 3k
45
40
35
30
25
20
15
10
5
0
0
Driver Leakage in Shutdown
Driver Output Waveforms
10
20
TEMPERATURE (°C)
30
V
V
= 0.1 F for charge storage. The capacitor may be tied to
ground or V
may be paralleled into common capacitors. For large
numbers of devices, increasing the size of the shared
common storage capacitors is recommended to reduce
ripple.
V
V
capacitor C = 0.1 F for charge storage.
OUT
OUT
40
–
–
= –20V
: Negative Supply Output (RS232 Drivers).
= 20V
50
– (2V
60
1347 G05
1347 G08
CC
CC
70
. With multiple devices, the V
– 1.5V). This pin requires an external
RECEIVER
C
OUTPUT
L
= 51pF
INPUT
20
16
14
12
10
18
6
8
4
0
–40
Receiver Output Waveforms
Driver Short-Circuit Current
I
–20
SC
+
I
SC
0
TEMPERATURE (°C)
–
20
40
+
and V
60
80
–
1347 G06
1347 G09
pins
100