LTC1337CG Linear Technology, LTC1337CG Datasheet - Page 5

• Manufacturer Part Number: LTC1337CG
• Description: IC 3DVR/5RCVR 5V RS232 28-SSOP
• Manufacturer: Linear Technology
• Type: Transceiverr

Specifications of LTC1337CG

• Number Of Drivers/receivers: 3/5
• Protocol: RS232
• Voltage - Supply: 4.5 V ~ 5 V
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SWITCHI G TI E WAVEFOR S
PI FU CTIO S
DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/
CMOS compatible. Inputs should not be allowed to float.
Tie unused inputs to V
DRIVER OUT: Driver Outputs at RS232 Voltage Levels.
Outputs are in a high impedance state when in Shutdown
mode or V
ESD to ±10kV for human body model discharges.
TEST CIRCUITS
OUTPUT
DRIVER
DRIVER
INPUT
U
Figure 4. Receiver Timing Test Load
t
LHD
Figure 3. Driver Timing Test Load
Figure 1. Driver Propagation Delay Timing
DRIVER
CC
U
INPUT
1.4V
RX IN
= 0V. The driver outputs are protected against
U
0V
DRIVER
U
RX
CC
W
.
OUTPUT
DRIVER
OUTPUT
RX
51pF
1337 F04
51pF
1337 F03
3k
1.4V
t
HLD
W
0V
1337 F01
V
V
V
0V
CC
+
–
PROTECTED
LINE PINS
TO ±10kV
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 Levels.
Outputs are in a high impedance state when in Shutdown
mode to allow data line sharing.
RS232
OUTPUT
0.1µF
RX IN
C1
RX
t
DRIVER 1 OUT
DRIVER 2 OUT
DRIVER 3 OUT
LHR
Figure 2. Receiver Propagation Delay Timing
0.1µF
C2
ON/OFF
RX1 IN
RX2 IN
RX3 IN
RX4 IN
RX5 IN
1.7V
V
V
+
CC
0.8V
10
11
12
13
14
1
2
3
4
5
6
7
8
9
ESD Test Circuit
LTC1337
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT
1.3V
V
GND
–
LTC1337
C3
0.1µF
t
HLR
0V
1337 TC01
1337 F02
1337fa
5
C4
0.1µF
V
0V
V
0V
CC
CC