LTC1338 Linear Technology, LTC1338 Datasheet - Page 4

• Manufacturer Part Number: LTC1338
• Description: 5V Low Power RS232 5-Driver/3-Receiver Transceiver
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
PI FU CTIO S
LTC1338
4
V
in the SHUTDOWN mode. This pin should be decoupled
with a 0.1 F ceramic capacitor.
GND: Ground Pin.
RECEIVER ENABLE: TTL/CMOS Compatible Enable Pin.
Refer to Table 1 for its functional description. This pin can
not float.
DRIVER ENABLE: TTL/CMOS Compatible Enable Pin. Re-
fer to Table 1 for its functional description. This pin can not
float.
V
1V. This pin requires an external capacitor C = 0.1 F for
CC
+
: Positive Supply Output (RS232 Drivers). V
40
10
60
50
30
20
U
30
25
10
20
15
: 5V Input Supply Pin. Supply current less than 0.2 A
5
0
–40
–40
V
Receiver Short-Circuit Current
CC
–20
–20
Supply Current
U
0
0
5 DRIVERS LOADED
TEMPERATURE (°C)
TEMPERATURE (°C)
1 DRIVER LOADED
I
SC
+
20
20
R
R
L
L
= 3k
= 3k
U
40
40
I
SC
–
60
60
LTC1338 • TPC04
W U
LTC1338 • TPC07
80
80
100
100
C
L
= 2500pF
OUTPUT
OUTPUT
DRIVER
DRIVER
R
R
INPUT
L
L
= 3k
= 3k
30
50
40
20
10
0
–40
Driver Leakage in Shutdown
Driver Output Waveforms
+
–20
2V
CC
0
TEMPERATURE (°C)
–
20
charge storage. The capacitor may be tied to ground or 5V.
With multiple devices, the 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 20 .
40
V
OUT
–
V
: Negative Supply Output (RS232 Drivers). V
+
+
OUT
, C1
= –20V
to C1
60
= 20V
–
LTC1338 • TPC05
LTC1338 • TPC08
, C2
80
–
, and another from C2
+
100
, C2
–
: Commutating Capacitor Inputs. These
RECEIVER
C
OUTPUT
L
= 50pF
INPUT
14
12
10
20
18
16
6
8
4
0
–40
Driver Short-Circuit Current
Receiver Output Waveforms
I
–20
+
SC
and V
+
I
SC
0
TEMPERATURE (°C)
–
+
–
to C2
20
pins may be paral-
40
–
. To maintain
60
LTC1338 • TPC06
–
LTC1338 • TPC09
80
2V
100
CC