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LT1332CG Datasheet

  • LT1332CG

  • Linear Technology [Wide Supply Range Low Power RS232 Transc...

  • LINER

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LT1332
Wide Supply Range
Low Power RS232 Transceiver with
12V VPP Output for Flash Memory
FEATURES
s
s
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
s
Generates Full RS232 Signal Levels from 3V Supply
12V VPP Output Available for Flash Memory
Useful with a Wide Variety of Switching Regulators
Low Supply Current: I(V
CC
) = 1mA
Wide Supply Range: 2V
鈮?/div>
V
CC
鈮?/div>
6V
ESD Protection Over
鹵10kV
Operates to 120k Baud
Outputs Assume a High Impedance State When Off
or Powered Down
One
碌Power
Receiver Remains Active While in
SHUTDOWN
Flowthrough Architecture Eases PC Board Layout
40碌A(chǔ) Supply Current in SHUTDOWN
Absolutely No Latch-Up
Available in SO and SSOP Packages
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鈥檚 positive
output, while charge is capacitively pumped from the
regulator鈥檚 switch pin to the negative supply. Schottky
rectifiers built into the LT1332 simplify the charge
pump design.
The LT1332/LT1109A combination shown below gener-
ates 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
on chip make the LT1332 resilient to multiple
鹵10kV
strikes, 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.
APPLICATI
s
s
S
Notebook and Palmtop Computers
Mouse Driver Circuits
TYPICAL APPLICATI
STANDARD FLASH MEMORY VPP GENERATOR
SWITCHER
V
IN
2 AA
BATTERIES
UP TO 6V
L1**
33碌H
22碌F*
V
IN
SW
LT1109A-12
SW
SENSE
ON/OFF
GND
PGND
LT1332 Powered from an LT1109A Micropower Switching Regulator
Configured for Flash Memory
12V VPP
OUTPUT
+
1碌F
V
+
1
24
23
22
21
20
19
18
17
16
15
14
LT1332
13
RS232
ON/OFF
LOGIC
SIDE
V
鈥?/div>
10碌F
C
鈥?/div>
2
3
4
5
RS232
SIDE
6
7
8
MBRS130T3
DRIVER
INPUT
DRIVER
OUTPUT
R
L
= 3k
C
L
= 2500pF
ON/OFF
* AVX TAJE226K035
** SUMIDA CD54-330N (708-956-0666)
9
10
NC
11
12
0.1碌F
LT1332 鈥?TA01
3V
RS232
V
CC
+
22碌F*
RECEIVER
OUTPUT
C
L
= 50pF
LT1332 鈥?TA02
U
Output Waveforms
UO
UO
1

LT1332CG 產(chǎn)品屬性

  • LT1332

  • 47

  • 集成電路 (IC)

  • 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器

  • -

  • 收發(fā)器

  • 3/5

  • RS232

  • 2 V ~ 6 V

  • 表面貼裝

  • 28-SSOP（0.209"，5.30mm 寬）

  • 28-SSOP

  • 管件

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