LTC1347 Ver la hoja de datos (PDF) - Linear Technology
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LTC1347
Linear Technology
LTC1347 Datasheet PDF : 8 Pages
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LTC1347
TYPICAL PERFOR A CE CHARACTERISTICS
VCC Supply Current
20
16
14
3 DRIVERS LOADED
12
RL = 3k
10
8
1 DRIVER LOADED
6
RL = 3k
4
2
0
0 10 20 30 40 50
TEMPERATURE (°C)
60 70
1347 G04
Driver Leakage in Shutdown
45
40
35
30
25
VOUT = –20V
20
15
10
VOUT = 20V
5
0
0 10 20 30 40 50 60 70
TEMPERATURE (°C)
1347 G05
Driver Short-Circuit Current
20
18
16
ISC–
14
ISC+
12
10
8
6
4
0
–40 –20
0 20 40 60
TEMPERATURE (°C)
80 100
1347 G06
Receiver Short-Circuit Current
60
50
40
ISC–
30
ISC+
20
Driver Output Waveforms
DRIVER
OUTPUT
RL = 3k
CL = 2500pF
DRIVER
OUTPUT
RL = 3k
INPUT
1347 G08
10
–40 –20
0 20 40 60
TEMPERATURE (°C)
80 100
1347 G07
Receiver Output Waveforms
RECEIVER
OUTPUT
CL = 51pF
INPUT
1347 G09
PI FU CTIO S
VCC: 5V Input Supply Pin. Supply current is typically 80µA
in the Shutdown mode. This pin should be decoupled with
a 0.1µF 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 80µA. All driver
outputs are in high impedance state. This pin cannot float.
V+: Positive Supply Output (RS232 Drivers).
V+ ≅ 2VCC – 1V. This pin requires an external capacitor C
= 0.1µF for charge storage. The capacitor may be tied to
4
ground or VCC. With multiple devices, the V + and V – pins
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–: Negative Supply Output (RS232 Drivers).
V – ≅ – (2VCC – 1.5V). This pin requires an external
capacitor C = 0.1µF for charge storage.
C1+, C1–, C2+, C2–: Commutating Capacitor Inputs. These
pins require two external capacitors C = 0.1µF: one from
C1+ to C1–, and another from C2+ to C2–. To maintain
1347fa
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