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參數(shù)資料
| 型號： | LT1332CSW#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 W/12V VPP 24-SOIC |
| 標(biāo)準(zhǔn)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： | 2 V ~ 6 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC |
| 包裝： | 帶卷 (TR) |
LT1332
1
TYPICAL APPLICATION
FEATURES
DESCRIPTION
Wide Supply Range
Low Power RS232 Transceiver with
12V VPP Output for Flash Memory
Output Waveforms
APPLICATIONS
n
Generates Full RS232 Signal Levels from 3V Supply
n
12V VPP Output Available for Flash Memory
n
Useful with a Wide Variety of Switching Regulators
n
Low Supply Current: I(VCC) = 1mA
n
Wide Supply Range: 2V
≤ VCC ≤ 6V
n
ESD Protection Over ±10kV
n
Operates to 120k Baud
n
Outputs Assume a High Impedance State When Off
or Powered Down
n
One Power Receiver Remains Active While in
SHUTDOWN
n
Flowthrough Architecture Eases PC Board Layout
n
40A Supply Current in SHUTDOWN
n
Absolutely No Latch-Up
n
Available in SO and SSOP Packages
n
Notebook and Palmtop Computers
n
Mouse Driver Circuits
The LT1332 is a 3-driver/5-receiver RS232 transceiver,
designed to be used in conjunction with a switching
regulator. The LT1332 shares the regulator’s positive
output, while charge is capacitively pumped from the
regulator’s switch pin to the negative supply. Schottky
rectifiers built into the LT1332 simplify the charge
pump design.
TheLT1332/LT1109Acombinationshownbelowgenerates
fully compliant RS232 signal levels from as little as 2V of
input supply. The switcher can deliver greater than 100mA
of output current, making the LT1332 an excellent choice
for mouse driver circuits.
Advanced driver output stages operate up to 120k baud
while driving heavy capacitive loads. New ESD structures
onchipmaketheLT1332resilienttomultiple±10kVstrikes,
eliminating costly transient suppressors.
A shutdown pin disables the transceiver except for one
receiver which remains active for detecting incoming
RS232 signals. When shut down, the disabled drivers and
receivers assume high impedance output states.
LT1332 Powered from an LT1109A Micropower Switching Regulator
Configured for Flash Memory
LT1332 TA01
22
F*
LT1332
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
SWITCHER
VIN 2 AA
BATTERIES
UP TO 6V
V–
V+
1
F
10
F
+
C–
12V VPP
OUTPUT
22
F*
STANDARD FLASH MEMORY VPP GENERATOR
L1**
33
H
0.1
F
3V
RS232
VCC
ON/OFF
RS232
ON/OFF
RS232
SIDE
LOGIC
SIDE
NC
+
LT1109A-12
VIN
SW
ON/OFF SENSE
GND
PGND
SW
*
**
AVX TAJE226K035
SUMIDA CD54-330N (708-956-0666)
MBRS130T3
DRIVER
OUTPUT
RL = 3k
CL = 2500pF
RECEIVER
OUTPUT
CL = 50pF
LT1332 TA02
DRIVER
INPUT
FOR INFORMATION PURPOSES ONLY
OBSOLETE:
Contact Linear Technology for Potential Replacement
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