LT1341CSW Linear Technology, LT1341CSW Datasheet - Page 5

• Manufacturer Part Number: LT1341CSW
• Description: IC TXRX 5V RS232 W/SHTDWN 28SOIC
• Manufacturer: Linear Technology
• Type: Transceiverr

Specifications of LT1341CSW

• Number Of Drivers/receivers: 3/5
• Protocol: RS232
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: LT1341CS

TYPICAL PERFOR
PI FU CTIO S
V
with a 0.1 F ceramic capacitor close to the package pin.
Insufficient supply bypassing can lead to low output drive
levels and erratic charge pump operation.
GND: Ground Pin.
ON/OFF: A TTL/CMOS logic low puts the device in the low
power shutdown mode. All of the drivers and four receiv-
ers go to a high impedance state. Receiver RX5 remains
active while the transceiver is in shutdown. The trans-
ceiver consumes only 60 A of supply current while in
shutdown. A logic high fully enables the transceiver.
DRIVER DISABLE: This pin provides an alternate control
for the charge pump and RS232 drivers. A logic high on
this pin shuts down the charge pump and places all drivers
CC
U
: 5V Input Supply Pin. This pin should be decoupled
RX5 OUTPUT
RX1 TO RX4
C
C
U
OUTPUT
L
L
= 50pF
= 50pF
INPUT
30
25
10
20
15
0
5
–55
Receiver Output Waveforms
Driver Short-Circuit Current
–25
U
0
TEMPERATURE ( C)
W
25
A
U
50
CE
75
I
I
SC
SC
LT1341 • TPC10
C
–
+
100
LT1341 • TPC12
HARA TERISTICS
125
C
DRIVER OUTPUT
DRIVER OUTPUT
in a high impedance state. All receivers remain active
under these conditions. Floating the driver disable pin or
driving it to a logic low level fully enables the transceiver.
Supply current drops to 3mA when in driver disable mode.
A logic low on the ON/OFF pin supersedes the state of the
DRIVER DISABLE pin.
V
1.5V. This pin requires an external charge storage capaci-
tor C
capacitors may be used to reduce supply ripple. With
multiple transceivers, the V
leled into common capacitors. For large numbers of
transceivers, increasing the size of the storage capaci-
tors is recommended to reduce ripple.
+
C
: Positive Supply Output (RS232 Drivers). V
L
= 2500pF
R
R
L
INPUT
L
= 3k
= 3k
30
50
40
20
10
0
0.1 F, tied to ground or V
–55
Driver Output Waveforms
Receiver Short-Circuit Current
–25
RX1 TO RX4 I
0
TEMPERATURE ( C)
RX5 I
RX5 I
25
SC
SC
SC
+
–
+
RX1 TO RX4 I
50
+
and V
75
SC
LT1341 • TPC11
–
100
–
LT1341 • TPC13
pins may be paral-
CC
125
. Larger value
LT1341
+
2V
CC
5
–