LTC1337C Linear Technology, LTC1337C Datasheet - Page 4

• Manufacturer Part Number: LTC1337C
• Description: 5V Low Power RS232 3-Driver/5-Receiver Transceiver
• Manufacturer: Linear Technology

PI FU CTIO S
LTC1337
TYPICAL PERFOR
V
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 which
reduces input supply current to less than 1 A and places
all drivers and receivers in high impedance state.
V
1V. This pin requires an external capacitor C = 0.1 F for
charge storage. The capacitor may be tied to ground or 5V.
With multiple devices, the V
4
CC
+
: Positive Supply Output (RS232 Drivers). V
20
16
14
12
10
55
50
45
40
35
30
25
20
15
10
U
8
6
4
2
0
: 5V Input Supply Pin. Supply current less than 1 A in
0
0
V
Receiver Short-Circuit Current
CC
10
10
Supply Current
U
3 DRIVERS LOADED
20
1 DRIVER LOADED
20
TEMPERATURE (°C)
TEMPERATURE (°C)
R
R
30
30
L
L
= 3k
= 3k
I
I
SC
SC
U
–
+
40
40
50
50
W
+
60
and V
60
1337 G04
1337 G07
A
U
70
70
CE
–
pins may be paral-
C
L
= 2500pF
OUTPUT
OUTPUT
DRIVER
DRIVER
C
R
R
INPUT
L
L
= 3k
HARA TERISTICS
= 3k
45
40
35
30
25
20
15
10
5
0
0
Driver Output Waveforms
Driver Leakage in SHUTDOWN
+
10
2V
C
CC
20
TEMPERATURE (°C)
–
30
V
leled into common capacitors. For large numbers of
devices, increasing the size of the shared common storage
capacitors is recommended to reduce ripple.
V
–1.5V). This pin requires an external capacitor C = 0.1 F
for charge storage.
C1
pins require two external capacitors C = 0.1 F. One from
C1
charge pump efficiency, the capacitor’s effective series
resistance should be less than 50 .
V
OUT
OUT
40
–
: Negative Supply Output (RS232 Drivers). V
+
+
= –20V
= 20V
, C1
to C1
50
–
, C2
60
–
1337 G05
, and another from C2
+
, C2
70
–
: Commutating Capacitor Inputs. These
C
OUTPUT
L
= 50pF
INPUT
20
18
16
14
12
10
RX
8
6
4
2
0
Driver Short-Circuit Current
Receiver Output Waveforms
10
20
+
TEMPERATURE (°C)
to C2
30
I
I
SC
SC
–
+
–
40
. To maintain
50
–
(2V
60
1337 G06
CC
70