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LT1237CG#TR

Description
IC txrx 5V rs232 adv lopwr28ssop
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size177KB,8 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LT1237CG#TR Overview

IC txrx 5V rs232 adv lopwr28ssop

LT1237CG#TR Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSSOP
package instructionSSOP,
Contacts28
Manufacturer packaging codeG
Reach Compliance Code_compli
ECCN codeEAR99
Other features1 RECEIVER ACTIVE UNDER SHUTDOWN; EXTERNAL CHARGE PUMP
Differential outputNO
Number of drives3
Input propertiesSCHMITT TRIGGER
Interface integrated circuit typeLINE TRANSCEIVER
Interface standardsEIA-232
JESD-30 codeR-PDSO-G28
JESD-609 codee0
length10.2 mm
Humidity sensitivity level1
Number of functions3
Number of terminals28
Maximum operating temperature70 °C
Minimum operating temperature
Output characteristics3-STATE
Output polarityINVERTED
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum receive delay600 ns
Number of receiver bits5
Maximum seat height2 mm
Nominal supply voltage5 V
surface mountYES
technologyBIPOLAR
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
maximum transmission delay1300 ns
width5.3 mm
LT1237
5V RS232 Transceiver with
Advanced Power Management and
One Receiver Active in Shutdown
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
s
s
One Receiver Remains Active While in Shutdown
ESD Protection over
±15kV
Uses Small Capacitors: 0.1µF, 0.2µF, 1.0µF
60µA Supply Current in Shutdown
Pin Compatible with LT1137A
120kBaud Operation for R
L
= 3k, C
L
= 2500pF
250kBaud Operation for R
L
= 3k, C
L
= 1000pF
Operates to 120kBaud
CMOS Comparable Low Power 30mW
Operates from a Single 5V Supply
Easy PC Layout—Flowthrough Architecture
Rugged Bipolar Design
Outputs Assume a High Impedance State When Off
or Powered Down
Absolutely No Latchup
Available in SO and SSOP Packages
The LT
®
1237 is an advanced low power three driver, five
receiver RS232 transceiver. Included on the chip is a
shutdown pin for reducing supply current near zero.
During shutdown one receiver remains active to detect
incoming RS232 signals, for example, to wake up a
system.
The LT1237 is fully compliant with all EIA RS232 specifi-
cations. New ESD structures on the chip allow the LT1237
to survive multiple
±15kV
strikes, eliminating the need for
costly TransZorbs
®
on the RS232 line pins.
The LT1237 operates in excess of 120kbaud even driving
heavy capacitive loads. Two shutdown modes allow the
driver outputs to be shut down separately from the receiv-
ers for more versatile control of the RS232 interface.
During shutdown, drivers and receivers assume a high
impedance state.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TransZorb is a registered trademark of General Instruments, GSI
APPLICATIO S
s
s
Notebook Computers
Palmtop Computers
TYPICAL APPLICATIO
V
+
1.0µF
2
×
0.1µF
DRIVER 1 OUT
RX1 IN
DRIVER 2 OUT
TO
LINE
RX2 IN
RX3 IN
RX4 IN
DRIVER 3 OUT
RX5 IN (LOW-Q)
ON/OFF
5V V
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LT1237
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
0.1µF
2
×
0.1µF
DRIVER 1 IN
RX1 OUT
DRIVER 2 IN
RX2 OUT
RX3 OUT
RX4 OUT
DRIVER 3 IN
RX5 OUT (LOW-Q)
GND
DRIVER
DISABLE
RING DETECT IN
µCONTROLLER
OR
µPROCESSOR
SHUTDOWN
CONTROL OUT
LT1237 TA01
RECEIVER
OUTPUT
C
L
= 50pF
DRIVER
OUTPUT
R
L
= 3k
C
L
= 2500pF
TO LOGIC
R
INPUT
U
Output Waveforms
1237 TA02
U
U
1

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Description IC txrx 5V rs232 adv lopwr28ssop IC txrx 5V rs232 adv lopwr28soic IC TXRX 5V RS232 ADV LOPWR 28DIP IC TXRX 5V RS232 ADV LOPWR28SOIC IC TXRX 5V RS232 ADV LOPWR28SOIC IC TXRX 5V RS232 ADV LOPWR28SSOP IC TXRX 5V RS232 ADV LOPWR28SSOP
Brand Name Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology Linear Technology
Is it Rohs certified? incompatible incompatible conform to conform to conform to conform to conform to
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI )
Parts packaging code SSOP SOIC DIP SOIC SOIC SSOP SSOP
package instruction SSOP, SOP, DIP, SOP, SOP, SSOP, SSOP, SSOP28,.3
Contacts 28 28 28 28 28 28 28
Manufacturer packaging code G SW NW SW SW G G
Reach Compliance Code _compli _compli compliant compliant compliant compliant compliant
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Differential output NO NO NO NO NO NO NO
Number of drives 3 3 3 3 3 3 3
Input properties SCHMITT TRIGGER SCHMITT TRIGGER SCHMITT TRIGGER SCHMITT TRIGGER SCHMITT TRIGGER SCHMITT TRIGGER SCHMITT TRIGGER
Interface integrated circuit type LINE TRANSCEIVER LINE TRANSCEIVER LINE TRANSCEIVER LINE TRANSCEIVER LINE TRANSCEIVER LINE TRANSCEIVER LINE TRANSCEIVER
Interface standards EIA-232 EIA-232 EIA-232 EIA-232 EIA-232 EIA-232 EIA-232
JESD-30 code R-PDSO-G28 R-PDSO-G28 R-PDIP-T28 R-PDSO-G28 R-PDSO-G28 R-PDSO-G28 R-PDSO-G28
JESD-609 code e0 e0 e3 e3 e3 e3 e3
Humidity sensitivity level 1 1 1 1 1 1 1
Number of functions 3 3 3 3 3 3 3
Number of terminals 28 28 28 28 28 28 28
Maximum operating temperature 70 °C 70 °C 70 °C 70 °C 70 °C 70 °C 70 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SSOP SOP DIP SOP SOP SSOP SSOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE IN-LINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE, SHRINK PITCH SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 235 235 260 260 260 260 260
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum receive delay 600 ns 600 ns 600 ns 600 ns 600 ns 600 ns 600 ns
Number of receiver bits 5 5 5 5 5 5 5
Maximum seat height 2 mm 2.65 mm 4.318 mm 2.65 mm 2.65 mm 2 mm 2 mm
Nominal supply voltage 5 V 5 V 5 V 5 V 5 V 5 V 5 V
surface mount YES YES NO YES YES YES YES
technology BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR BIPOLAR
Temperature level COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING GULL WING THROUGH-HOLE GULL WING GULL WING GULL WING GULL WING
Terminal pitch 0.65 mm 1.27 mm 2.54 mm 1.27 mm 1.27 mm 0.65 mm 0.65 mm
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 20 20 40 30 30 30 30
maximum transmission delay 1300 ns 1300 ns 1300 ns 1300 ns 1300 ns 1300 ns 1300 ns
width 5.3 mm 7.5 mm 15.24 mm 7.5 mm 7.5 mm 5.3 mm 5.3 mm
length 10.2 mm 17.9 mm - 17.9 mm 17.9 mm 10.2 mm 10.2 mm
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