參數(shù)資料
型號: LT1341CSW#TRPBF
廠商: Linear Technology
文件頁數(shù): 1/8頁
文件大?。?/td> 0K
描述: IC TXRX 5V RS232 W/SHTDWN 28SOIC
標準包裝: 1,000
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 3/5
規(guī)程: RS232
電源電壓: 4.5 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 28-SOIC
包裝: 帶卷 (TR)
1
LT1341
5V RS232 Transceiver with One
Receiver Active in Shutdown
S
FEATURE
The LT
1341 is an advanced low power three-driver, five-
receiver RS232 transceiver. Included on the chip is a
shutdown pin for reducing supply current to near zero.
During shutdown one receiver remains active to detect
incoming RS232 signals, for example, to wake up a
system. All other receivers and the 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 LT1341 to
survive multiple
±10kV strikes, eliminating the need for
costly TransZorbs
on the RS232 line pins.
The LT1341 is fully compliant with all EIA RS232 specifi-
cations and operates in excess of 120kbaud even driving
heavy capacitive loads.
s
One Receiver Remains Active While in Shutdown
s
ESD Protection Over
±10kV
s
Uses Small Capacitors: 0.1
F, 0.2F
s
60
A Supply Current in Shutdown
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 Single 5V 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
s
Available in SSOP Package
D
U
ESCRIPTIO
, LTC and LT are registered trademarks of Linear Technology Corporation.
TransZorb is a registered trademark of General Instruments, GSI
Output Waveforms
R
LT1341 TA02
RECEIVER
OUTPUT
CL = 50pF
DRIVER
OUTPUT
RL = 3k
CL = 2500pF
INPUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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
V+
0.1
F
2
× 0.1F
2
× 0.1F
0.1
F
GND
DRIVER DISABLE
TO LINE
TO LOGIC
V
LT1341 TA01
RX5 OUT (LOW-Q)
RING DETECT IN
CONTROLLER
OR
PROCESSOR
SHUTDOWN
CONTROL OUT
LT1341
NC
VCC
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN (LOW-Q)
ON/OFF
NC
s
Notebook Computers
s
Palmtop Computers
U
S
A
O
PPLICATI
U
A
O
PPLICATI
TYPICAL
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