900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LT1342 Datasheet

5V RS232 Transceiver with 3V Logic Interface

No Preview Available !

LT1342
5V RS232 Transceiver with
3V Logic Interface
FEATURES
s ESD Protection Over ±10kV
s 3V Logic Interface
s Uses Small Capacitors: 0.1µF, 0.2µF
s 1µA Supply Current in Shutdown
s Low Power Driver Disable Operating Mode
s Pin Compatible with LT1137A
s 120kBaud Operation for RL = 3k, CL = 2500pF
s 250kBaud Operation for RL = 3k, CL = 1000pF
s CMOS Comparable Low Power: 60mW
s Operates from a 5V Supply and 3V Logic Supply
s Easy PC Layout: Flowthrough Architecture
s Rugged Bipolar Design
s Outputs Assume a High Impedance State When
Off or Powered Down
s Absolutely No Latchup
APPLICATI S
s Notebook Computers
s Palmtop Computers
DESCRIPTIO
The LT®1342 is an advanced low power three-driver, five-
receiver RS232 transceiver. The LT1342 operates from a
5V supply and a 3V logic supply. Receiver outputs can
interface directly to 3V logic circuits. Included on the chip
is a shutdown pin for reducing supply current to near zero.
All receivers and drivers assume high impedance states
during shutdown.
The driver disable function provides additional control of
operating mode. When driver disable is high the charge
pump and drivers turn off. Receivers continue to operate
during driver disable.
New ESD structures on the chip allow the LT1342 to
survive multiple ±10kV strikes, eliminating the need for
costly TransZorbs® on the RS232 line pins.
The LT1342 is fully compliant with all EIA RS232 specifi-
cations and operates in excess of 120kbaud even driving
heavy capacitive loads.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TransZorb is a registered trademark of General Instruments, GSI.
TYPICAL APPLICATI
V+ 1
0.1µF
5V VCC 2
3
2 × 0.1µF
4
TO LINE
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN
ON/OFF
3V VL
5
6
7
8
9
10
11
12
13
14
LT1342
28 V
27 0.1µF
26 2 × 0.1µF
25 DRIVER 1 IN
24 RX1 OUT
23
DRIVER 2 IN
22 RX2 OUT
21
TO 3V LOGIC
RX3 OUT
20 RX4 OUT
19 DRIVER 3 IN
18
RX5 OUT
17
GND
16
DRIVER DISABLE
15 NC
LT1342 • TA01
RECEIVER
OUTPUT
VL = 3V
CL = 50pF
DRIVER
ROUTPUT
RL = 3k
CL = 2500pF
INPUT
Output Waveforms
LT1342 • TA02
1


Linear Technology Electronic Components Datasheet

LT1342 Datasheet

5V RS232 Transceiver with 3V Logic Interface

No Preview Available !

LT1342
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltage (VCC) ................................................ 6V
Supply Voltage (VL) .................................................. 6V
V+ ........................................................................ 13.2V
V...................................................................... –13.2V
Input Voltage
Driver ........................................................... Vto V +
Receiver ................................................ – 30V to 30V
Output Voltage
Driver .................................................... – 30V to 30V
Receiver .................................... – 0.3V to VCC + 0.3V
Short-Circuit Duration
V+ ................................................................... 30 sec
V................................................................... 30 sec
Driver Output .............................................. Indefinite
Receiver Output .......................................... Indefinite
Operating Temperature Range .................... 0°C to 70°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V+ 1
5V VCC
C1+
C1
2
3
4
DRIVER 1 OUT 5
RX1 IN 6
DRIVER 2 OUT 7
RX2 IN 8
RX3 IN 9
RX4 IN 10
DRIVER 3 OUT 11
RX5 IN 12
ON/OFF 13
3V VL 14
28 V
27 C2
26 C2+
25 DRIVER 1 IN
24 RX1 OUT
23 DRIVER 2 IN
22 RX2 OUT
21 RX3 OUT
20 RX4 OUT
19 DRIVER 3 IN
18 RX5 OUT
17 GND
16
DRIVER
DISABLE
15 NC
ORDER PART
NUMBER
LT1342CG
LT1342CNW
LT1342CSW
G PACKAGE
NW PACKAGE
28-LEAD PLASTIC SSOP 28-LEAD WIDE PDIP
SW PACKAGE
28-LEAD WIDE PLASTIC SO
TJMAX = 125°C, θJA = 96°C/ W (G)
TJMAX = 125°C, θJA = 56°C/ W (NW)
TJMAX = 125°C, θJA = 85°C/ W (SW)
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS (Note 2)
PARAMETER
Power Supply Generator
V+ Output
VOutput
Supply Current (VCC)
Logic Supply Current (VL)
Supply Current When OFF (VCC)
Logic Supply Current (VL) When OFF
Supply Rise Time
Shutdown to Turn-On
ON/OFF Pin Thresholds
ON/OFF Pin Current
DRIVER DISABLE Pin Thresholds
DRIVER DISABLE Pin Current
Oscillator Frequency
CONDITIONS
(Note 3)
(Note 4)
Shutdown (Note 5)
Driver Disable
Shutdown (Note 5)
Driver Disable
C1 = C2 = 0.2µF,
C+ = C = 0.1µF
Input Low Level (Device Shutdown)
Input High Level (Device Enabled)
0V VON/OFF 5V
Input Low Level (Drivers Enabled)
Input High Level (Drivers Disabled)
0V VDRIVER DISABLE 5V
MIN TYP MAX
8.6
–7
12 17
0.1 1
q 1 10
3
q 1 10
0.1 1
0.2
q 1.4 0.8
q 2.4
1.4
q –15
80
q 1.4 0.8
q 2.4
1.4
q –10
500
130
UNITS
V
V
mA
mA
µA
mA
µA
mA
ms
V
V
µA
V
V
µA
kHz
2


Part Number LT1342
Description 5V RS232 Transceiver with 3V Logic Interface
Maker Linear Technology
PDF Download

LT1342 Datasheet PDF






Similar Datasheet

1 LT1341 5V RS232 Transceiver with One Receiver Active in Shutdown
Linear Technology
2 LT1342 5V RS232 Transceiver with 3V Logic Interface
Linear Technology





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy