OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LTC1338CSW#PBF

P1-P3P4-P6P7-P8
4
LTC1338
TYPICAL PERFOR A CE CHARACTERISTICS
WU
V
CC
Supply Current Driver Leakage in Shutdown Driver Short-Circuit Current
TEMPERATURE (°C)
–40
SUPPLY CURRENT (mA)
20
25
30
20 60
LTC1338 • TPC04
15
10
–20 0
40 80 100
5
0
5 DRIVERS LOADED
R
L
= 3k
1 DRIVER LOADED
R
L
= 3k
TEMPERATURE (°C)
–40
0
SHORT-CIRCUIT CURRENT (mA)
4
8
10
12
40
20
LTC1338 • TPC06
6
080
14
16
18
–20
60
20 100
I
SC
+
I
SC
–
TEMPERATURE (°C)
–40
0
LEAKAGE CURRENT (µA)
20
50
0
40
60
LTC1338 • TPC05
10
40
30
–20
20
80
100
V
OUT
= –20V
V
OUT
= 20V
Receiver Short-Circuit Current Driver Output Waveforms Receiver Output Waveforms
TEMPERATURE (°C)
–40
10
SHORT-CIRCUIT CURRENT (mA)
30
60
0
40
60
LTC1338 • TPC07
20
50
40
–20
20
80
100
I
SC
–
I
SC
+
DRIVER
OUTPUT
R
L
= 3k
C
L
= 2500pF
DRIVER
OUTPUT
R
L
= 3k
INPUT
LTC1338 • TPC08 LTC1338 • TPC09
RECEIVER
OUTPUT
C
L
= 50pF
INPUT
PI FU CTIO S
U
UU
V
CC
: 5V Input Supply Pin. Supply current less than 0.2µA
in the SHUTDOWN mode. This pin should be decoupled
with a 0.1µF ceramic capacitor.
GND: Ground Pin.
RECEIVER ENABLE: TTL/CMOS Compatible Enable Pin.
Refer to Table 1 for its functional description. This pin can
not float.
DRIVER ENABLE: TTL/CMOS Compatible Enable Pin. Re-
fer to Table 1 for its functional description. This pin can not
float.
V
+
: Positive Supply Output (RS232 Drivers). V
+
≅ 2V
CC
–
1V. This pin requires an external capacitor C = 0.1µF for
charge storage. The capacitor may be tied to ground or 5V.
With multiple devices, the V
+
and V
–
pins may be paral-
leled 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
–
≅ 2V
CC
– 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
charge pump efficiency, the capacitor’s effective series
resistance should be less than 20Ω.
5
LTC1338
PI FU CTIO S
U
UU
DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/
CMOS compatible. Inputs should not be allowed to float.
Tie unused inputs to V
CC
.
DRIVER OUT: Driver Outputs at RS232 Voltage Levels.
Outputs are in a high impedance state when in SHUT-
DOWN, RECEIVER ALIVE mode 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 SHUT-
DOWN or RECEIVER DISABLE mode to allow data line
sharing.
Table 1. Functional Description
MODE RX ENABLE DR ENABLE DRIVERS RECEIVERS I
CC
(µA)(TYP)
SHUTDOWN 0 0 All driver outputs are All receiver outputs are 0.2
high impedance. high impedance.
Receiver Disable 0 1 All drivers alive. All receiver outputs are 500
high impedance.
RECEIVER ALIVE 1 0 All driver outputs are All receivers alive. 50
high impedance.
Normal 1 1 All drivers alive. All receivers alive. 500
TI
W
E
WAVEFORS
U
G
WITCHI
W
S
Figure 1. Driver Propagation Delay Timing
Figure 2. Receiver Propagation Delay Timing
1.4V
0V
V
CC
0V
V
+
V
–
0V
DRIVER
INPUT
DRIVER
OUTPUT
1.4V
t
HLD
t
LHD
LTC1338 • F01
0.8V
V
CC
0V
2.4V
RX
INPUT
RX
OUTPUT
1.3V
t
HLR
1.7V
t
LHR
LTC1338 • F02
V
CC
0V
6
LTC1338
TEST CIRCUITS
Driver Timing Test Load
Receiver Timing Test Load
RX
RX INPUT
51pF
RX
OUTPUT
LTC1338 • F04
DRIVER
DRIVER
INPUT
3k
51pF
DRIVER
OUTPUT
LTC1338 • F03
ESD Test Circuit
LTC1338 • TC01
V
CC
C1
0.1µF
LTC1338
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DRIVER 1 OUT
DRIVER 2 OUT
RX1 IN
DRIVER 3 OUT
RX2 IN
DRIVER 4 OUT
RX3 IN
DRIVER 5 OUT
RX ENABLE
NC
28
27
26
25
24
23
22
21
20
19
18
17
16
15
C3
0.1µF
DRIVER 1 IN
DRIVER 2 IN
RX1 OUT
DRIVER 3 IN
RX2 OUT
DRIVER 4 IN
RX3 OUT
DRIVER 5 IN
GND
DRIVER ENABLE
NC
V
–
V
+
C2
0.1µF
C4
0.1µF
RS232
LINE PINS
PROTECTED
TO ±10kV
P1-P3P4-P6P7-P8

LTC1338CSW#PBF

Mfr. #:
Buy LTC1338CSW#PBF
Manufacturer:
Analog Devices Inc.
Description:
RS-232 Interface IC 5V L Pwr RS232 5-Drvr/3-Rcv Tran
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet