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MAX253CUA+

Description
gate drivers Transformer driver for iso RS-485 int
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size720KB,18 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
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MAX253CUA+ Overview

gate drivers Transformer driver for iso RS-485 int

MAX253CUA+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
Parts packaging codeSOIC
package instructionTSSOP, TSSOP8,.19
Contacts8
Reach Compliance Codecompli
ECCN codeEAR99
Factory Lead Time6 weeks
Interface integrated circuit typeINTERFACE CIRCUIT
JESD-30 codeS-PDSO-G8
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSSOP8,.19
Package shapeSQUARE
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
power supply5 V
Certification statusNot Qualified
Maximum seat height1.1 mm
Maximum supply voltage5.5 V
Minimum supply voltage4.5 V
Nominal supply voltage5 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3 mm
Base Number Matches1
AVAILAB
LE
MAX253
Transformer Driver for
Isolated RS-485 Interface
_______________General Description
The MAX253 monolithic oscillator/power-driver is
specifically designed to provide isolated power for an
isolated RS-485 or RS-232 data interface. The device
drives a center-tapped transformer primary from a 5V
or 3.3V DC power supply. The secondary can be
wound to provide any isolated voltage needed at power
levels up to 1W.
The MAX253 consists of a CMOS oscillator driving a
pair of N-channel power switches. The oscillator runs
at double the output frequency, driving a toggle flip-flop
to ensure 50% duty cycle to each of the switches.
Internal delays are arranged to ensure break-before-
make action between the two switches.
The SD pin puts the entire device into a low-power
shutdown state, disabling both the power switches and
oscillator.
____________________________Features
Power-Supply Transformer Driver for Isolated
RS-485/RS-232 Data-Interface Applications
Single 5V or 3.3V Supply
Low-Current Shutdown Mode: 0.4µA
Pin-Selectable Frequency: 350kHz or 200kHz
8-Pin DIP, SO, and
µMAX
®
Packages
MAX253
______________Ordering Information
PART
MAX253CPA
MAX253CSA
MAX253CUA
MAX253C/D
MAX253EPA
MAX253ESA
MAX253ESA/V
MAX253MJA
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
8 Plastic DIP
8 SO
8 μMAX
Dice*
8 Plastic DIP
8 SO
8 SO
8 CERDIP**
________________________Applications
Isolated RS-485/RS-232 Power-Supply
Transformer Driver
High Noise-Immunity Communications Interface
Isolated and/or High-Voltage Power Supplies
Bridge Ground Differentials
Medical Equipment
Process Control
*Contact
factory for dice specifications.
**Contact
factory for availability and processing to MIL-STD-883.
Devices are also available in a lead(Pb)-free/RoHS-compliant
package. Specify lead-free by adding a (+) to the part number
when ordering.
/V Denotes an automotive qualified part.
__________Typical Operating Circuit
Functional Diagrams
ON / OFF
4
SD
6
V
CC
D1
1
C3
C2
V
IN
5V
C1
OUTPUT
5V @ 200mA
MAX253
3
FREQUENCY
SWITCH
FS
GND1
2
D2
GND2
7
8
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
µMAX is trademark of Maxim Integrated Products, Inc.
UCSP is aa registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-0226; Rev 2; 4/10

MAX253CUA+ Related Products

MAX253CUA+ MAX253ESA+ MAX253CSA+ MAX253CSA+T MAX253EPA+ MAX253EUA+T
Description gate drivers Transformer driver for iso RS-485 int gate drivers Transformer driver for iso RS-485 int gate drivers Transformer driver for iso RS-485 int gate drivers Transformer driver for iso RS-485 int gate drivers Transformer driver for iso RS-485 int gate drivers Transformer driver for iso RS-485 int
Is it lead-free? Lead free Lead free Lead free Lead free Lead free Lead free
Is it Rohs certified? conform to conform to conform to conform to conform to conform to
Parts packaging code SOIC SOIC SOIC SOIC DIP SOIC
package instruction TSSOP, TSSOP8,.19 ROHS COMPLIANT, SOP-8 ROHS COMPLIANT, SOP-8 SOP, SOP8,.25 DIP, DIP8,.3 TSSOP,
Contacts 8 8 8 8 8 8
Reach Compliance Code compli compli compli compli compli compli
ECCN code EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Factory Lead Time 6 weeks 6 weeks 6 weeks 6 weeks 6 weeks 6 weeks
Interface integrated circuit type INTERFACE CIRCUIT INTERFACE CIRCUIT INTERFACE CIRCUIT INTERFACE CIRCUIT INTERFACE CIRCUIT INTERFACE CIRCUIT
JESD-30 code S-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDIP-T8 S-PDSO-G8
JESD-609 code e3 e3 e3 e3 e3 e3
length 3 mm 4.9 mm 4.9 mm 4.9 mm 9.375 mm 3 mm
Humidity sensitivity level 1 1 1 1 1 1
Number of functions 1 1 1 1 1 1
Number of terminals 8 8 8 8 8 8
Maximum operating temperature 70 °C 85 °C 70 °C 70 °C 85 °C 85 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code TSSOP SOP SOP SOP DIP TSSOP
Package shape SQUARE RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR SQUARE
Package form SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE IN-LINE SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 260 260 260 260 260 NOT SPECIFIED
Maximum seat height 1.1 mm 1.75 mm 1.75 mm 1.75 mm 4.572 mm 1.1 mm
Maximum supply voltage 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V
Minimum supply voltage 4.5 V 4.5 V 4.5 V 4.5 V 4.5 V 4.5 V
Nominal supply voltage 5 V 5 V 5 V 5 V 5 V 5 V
surface mount YES YES YES YES NO YES
technology CMOS CMOS CMOS CMOS CMOS CMOS
Temperature level COMMERCIAL INDUSTRIAL COMMERCIAL COMMERCIAL INDUSTRIAL INDUSTRIAL
Terminal surface Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING GULL WING GULL WING GULL WING THROUGH-HOLE GULL WING
Terminal pitch 0.65 mm 1.27 mm 1.27 mm 1.27 mm 2.54 mm 0.65 mm
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 30 30 30 30 30 NOT SPECIFIED
width 3 mm 3.9 mm 3.9 mm 3.9 mm 7.62 mm 3 mm
Encapsulate equivalent code TSSOP8,.19 SOP8,.25 SOP8,.25 SOP8,.25 DIP8,.3 -
power supply 5 V 5 V 5 V 5 V 5 V -
Certification status Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified -
Base Number Matches 1 1 1 1 - -
Maker - Maxim Maxim - Maxim Maxim
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