LT1332CSW Linear Technology, LT1332CSW Datasheet - Page 5

• Manufacturer Part Number: LT1332CSW
• Description: IC TXRX RS232 W/12V VPP 24-SOIC
• Manufacturer: Linear Technology
• Type: Transceiverr

Specifications of LT1332CSW

• Number Of Drivers/receivers: 3/5
• Protocol: RS232
• Voltage - Supply: 2 V ~ 6 V
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
V
accommodate a wide range of logic levels, yet the system
still responds correctly to RS232 signals. Supply current
drops to 40µA in the SHUTDOWN mode. This pin should
be decoupled with a 0.1µF ceramic capacitor.
GND: Ground Pins. Pins 13 and 23 (S Package) must both
be grounded for proper operation.
ON/OFF: Controls the operation mode of the device
and is CMOS compatible. A logic low puts the device
in the SHUTDOWN mode which reduces input supply
current to 40µA and places all of the drivers and four
of the receivers in a high impedance state. A logic high
fully enables the device.
CC
RX OUTPUT
: Input Supply Pin. V
C
5
4
2
1
0
3
L
2.0
5V/DIV
2V/DIV
= 50pF
INPUT
Receiver Input Thresholds
vs Supply Voltage
2.5
Receiver Output Waveforms
3.0
SUPPLY VOLTAGE (V)
3.5
4.0
V
V
4.5
TH
TH
CC
HIGH
LOW
5.0
can vary from 2V to 6V to
LT1332 • TPC10
5.5
6.0
2.5
2.0
1.5
1.0
0.5
0
–50
LT1332 • TPC13
Receiver Input Thresholds
vs Temperature
V
CC
–25
= 3V
V
0
TH
TEMPERATURE (°C)
HIGH
25
50
V
be greater than 6.5V and less than 13.2V to assure
valid RS232 output signals. An additional decoupling
capacitor may be required if the V
far away from the LT1332.
V
an external capacitor. When the device is powered from a
switching regulator, the filter capacitor should be selected
based on the maximum tolerable ripple for the specified
minimum regulator on time. For some low frequency
Burst Mode
relatively large (C ≥ 10µF). Low ESR tantalum capacitors
Burst Mode
+
–
: Positive Supply Input (RS232 Drivers). V
: Negative Supply Pin (RS232 Drivers). This pin requires
C
V
75
L
TH
= 2500pF
OUTPUT
OUTPUT
10V/DIV
10V/DIV
DRIVER
DRIVER
R
R
LOW
5V/DIV
INPUT
L
L
100 125
™
= 3k
= 3k
is a trademark of Linear Technology Corporation
LT1332 • TPC11
Driver Output Waveforms
™
150
regulators, the filter capacitor should be
0.3
0.6
0.5
0.4
0.1
0.2
0
2.0
Receiver Output Voltage
vs Supply Voltage
RECEIVER
OUTPUT LOW
SINKING 500µA
2.5
RECEIVER
OUTPUT LOW
SINKING 250µA
3.0
SUPPLY VOLTAGE (V)
+
3.5
generator is located
4.0
LT1332
4.5
OUTPUT HIGH
(V
SOURCING
RECEIVER
LT1332 • TPC13
CC
5.0
+
– V
LT1332 • TPC12
should
OUT
5.5
)
5
6.0