LTC1382CSW Linear Technology, LTC1382CSW Datasheet - Page 5

• Manufacturer Part Number: LTC1382CSW
• Description: IC TXRX 5V RS232 W/SHTDWN 18SOIC
• Manufacturer: Linear Technology
• Type: Transceiverr

Specifications of LTC1382CSW

• Number Of Drivers/receivers: 2/2
• Protocol: RS232
• Voltage - Supply: 4.5 V ~ 5 V
• Mounting Type: Surface Mount
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: LTC1382CS

V
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. Both driver
outputs are forced into three-state and the supply current
is 0.2µA.
V
2V. This pin requires an external capacitor C = 0.1µF for
charge storage. The capacitor may be tied to ground or
V
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
– 2V). This pin requires an external capacitor C = 0.1µF for
charge storage.
C1
pins require two external capacitors C = 0.1µF: one from
C1
SWITCHI G TI E WAVEFOR S
PI FU CTIO S
OUTPUT
DRIVER
DRIVER
CC
CC
+
–
INPUT
: Positive Supply Output (RS232 Drivers). V
: Negative Supply Output (RS232 Drivers). V
+
+
U
: 5V Input Supply Pin. This pin should be decoupled
. With multiple devices, the V
, C1
to C1
–
, C2
t
LHD
Figure 1. Driver Propagation Delay Timing
U
–
1.4V
and another from C2
+
, C2
U
–
0V
: Commutating Capacitor Inputs. These
U
W
+
+
and V
to C2
1.4V
–
pins may share
–
. To maintain
t
HLD
–
+
W
≅ – (2V
≅ 2V
0V
LTC1382 • F01
CC
CC
V
0V
V
V
–
CC
+
–
charge pump efficiency, the capacitor’s effective series
resistance should be less than 2Ω.
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
included on chip. To minimize power consumption, the
internal driver pull-up resistors are disconnected from V
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
±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.
OUTPUT
CC
INPUT
RX
RX
= 0V. The driver outputs are protected against ESD to
t
LHR
Figure 2. Receiver Propagation Delay Timing
1.7V
0.8V
1.3V
LTC1382
t
HLR
2.4V
CC
LTC1382 • F02
1382fa
5
are
V
0V
V
0V
CC
CC
CC