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LTC2804CDHC-PBF

Description
1.8V to 5.5V RS-232 Single and Dual Transceivers
File Size384KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet View All

LTC2804CDHC-PBF Overview

1.8V to 5.5V RS-232 Single and Dual Transceivers

LTC2801/LTC2802/
LTC2803/LTC2804
1.8V to 5.5V RS-232
Single and Dual Transceivers
FEATURES
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DESCRIPTION
The LTC
®
2801/LTC2802/LTC2803/LTC2804 are single and
dual RS-232 transceivers in narrow SSOP and chip-scale
DFN packages. All operate over a supply range of 1.8V to
5.5V, which permits operation directly from two alkaline,
NiCd or NiMH cells. An integrated DC-to-DC converter
generates power supplies for driving RS-232 levels. A
logic supply pin allows easy interfacing with different logic
levels independent of the DC-DC supply.
These parts are compatible with the TIA/EIA-232-F stan-
dard. Driver outputs are protected from overload and can
be shorted to ground or up to ±15V without damage. To
extend battery life, receivers can be kept active, operating
at reduced speed, with only 15μA current. In shutdown
mode, current is further reduced to 1μA. Line sharing and
half-duplex operation are also supported.
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1.8V to 5.5V Supply Voltage
Single and Dual Transceivers
High-Speed Operation
1Mbps for 250pF/3kΩ Load (LTC2802, LTC2804)
250kbps for 1nF/3kΩ Load
100kbps for 2.5nF/3kΩ TIA/EIA-232-F Load
Low-Power 1μA Shutdown and 15μA Receivers-
Active Modes
No Damage or Latch-Up to ±10kV ESD on RS-232
Interface
Logic Supply Pin for Easy Level-Shifting to UART or
Microprocessor
Low-Latency Output Enable Allows Line Sharing and
Half-Duplex Operation
True RS-232 Compliant Output Levels
Small Footprint:
LTC2801/LTC2802 4mm
×
3mm DFN Package
LTC2803/LTC2804 Narrow SSOP-16 and
5mm
×
3mm DFN Packages
PRODUCT SELECTION GUIDE
PART NUMBER
LTC2801
LTC2802
LTC2803
LTC2803-1
LTC2804
LTC2804-1
DRIVERS
1
1
2
2
2
2
RECEIVERS
1
1
2
2
2
2
PACKAGE
12-Lead DFN
12-Lead DFN
16-Lead DFN
16-Lead Narrow SSOP
16-Lead DFN
16-Lead Narrow SSOP
APPLICATIONS
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Battery-Powered Systems
Computers and Consumer Electronics
Diagnostic Ports
L,
LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
1.8V TO 5.5V
L1
10μH
LTC2802 at 1.8V and 1Mbps
C4
1μF
V
CC
V
L
PS
LTC2802
SW
C1
220nF
CAP
2V/DIV
TIN
OFF ON
MODE
TIN
TOUT
5V/DIV
TOUT
ROUT
RIN
2V/DIV
ROUT
GND
V
DD
C2
1μF
V
EE
C3
1μF
2801 TA01a
V
CC
= V
L
= 1.8V 400ns/DIV
WRAPPING DATA
TOUT LOAD = 250pF + RIN
ROUT LOAD = 150pF
2801 TA01b
2801234fc
1

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