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參數(shù)資料
| 型號： | LTC1382CN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | 5V Low Power RS232 Transceiver with Shutdown |
| 中文描述： | DUAL LINE TRANSCEIVER, PDIP18 |
| 封裝： | PLASTIC, DIP-18 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 211K |
| 代理商： | LTC1382CN |
5
LTC1382
PI FU
V
CC
:
5V Input Supply Pin. This pin should be decoupled
with a 0.1
μ
F ceramic capacitor.
GND:
Ground Pin.
ON/OFF:
TTL/CMOS Compatible Shutdown Pin. A logic
low puts the device in the Shutdown mode. Both driver
outputs are forced into three-state and the supply current
is 0.2
μ
A.
V
+
:
Positive Supply Output (RS232 Drivers). V
+
2V
CC
–
2V. This pin requires an external capacitor C = 0.1
μ
F for
charge storage. The capacitor may be tied to ground or
V
CC
. With multiple devices, the V
+
and V
–
pins may share
a common capacitor. For large numbers of devices, in-
creasing the size of the shared common storage capaci-
tors is recommended to reduce ripple.
V
–
:
Negative Supply Output (RS232 Drivers). V
–
–(2V
CC
– 2V). This pin requires an external capacitor C = 0.1
μ
F for
charge storage.
C1
+
, C1
–
, C2
+
, C2
–
:
Commutating Capacitor Inputs. These
pins require two external capacitors C = 0.1
μ
F: one from
C1
+
to C1
–
and another from C2
+
to C2
–
. To maintain
U
charge pump efficiency, the capacitor’s effective series
resistance should be less than 2
.
TR IN:
RS232 Driver Input Pins. Inputs are TTL/CMOS
compatible. The inputs of unused drivers can be left
unconnected since 300k input pull-up resistors to V
CC
are
included on chip. To minimize power consumption, the
internal driver pull-up resistors are disconnected from V
CC
in the Shutdown mode.
TR OUT:
Driver Outputs at RS232 Voltage Levels. Outputs
are in a high impedance state when in the Shutdown or
V
CC
= 0V. The driver outputs are protected against ESD to
±
10kV for human body model discharges.
RX IN:
Receiver Inputs. These pins can be forced to
±
25V
without damage. The receiver inputs are protected against
ESD to
±
10kV for human body model discharges. Each
receiver provides 0.4V of hysteresis for noise immunity.
RX OUT:
Receiver Outputs with TTL/CMOS Voltage Lev-
els. Outputs are in a high impedance state when in the
Shutdown mode.
Figure 1. Driver Propagation Delay Timing
Figure 2. Receiver Propagation Delay Timing
SWITCHU
W
1.4V
0V
V
CC
0V
V
+
V
–
0V
DRIVER
INPUT
DRIVER
OUTPUT
1.4V
HLD
LHD
LTC1382 F01
0.8V
V
CC
0V
2.4V
RX
INPUT
RX
OUTPUT
1.3V
HLR
1.7V
LHR
LTC1382 F02
V
CC
0V
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|---|---|
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