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MAX6957AAI+

Description
led display drivers 2.5-5.5V 20/28port led display driver
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size529KB,25 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
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MAX6957AAI+ Overview

led display drivers 2.5-5.5V 20/28port led display driver

MAX6957AAI+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeSSOP
package instructionSOP, SSOP28,.3
Contacts28
Reach Compliance Codecompliant
ECCN codeEAR99
Factory Lead Time6 weeks
Other featuresCOMMON-ANODE
data entry modeSERIAL
display modeSEGMENT
Interface integrated circuit typeLED DISPLAY DRIVER
JESD-30 codeR-PDSO-G28
JESD-609 codee3
length10.2 mm
Humidity sensitivity level1
Multiplex display functionNO
Number of digits/characters7-DIGIT
Number of functions1
Number of segments20
Number of terminals28
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSSOP28,.3
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
power supply3/5 V
Certification statusNot Qualified
Maximum seat height1.99 mm
Maximum supply voltage5.5 V
Minimum supply voltage2.5 V
Nominal supply voltage3.3 V
surface mountYES
technologyCMOS
Temperature levelAUTOMOTIVE
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width5.29 mm
Base Number Matches1
19-2429; Rev 4; 2/07
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port LED Display Driver and I/O Expander
General Description
The MAX6957 compact, serial-interfaced LED display
driver general-purpose I/O (GPIO) peripheral provides
microprocessors with up to 28 ports. Each port is indi-
vidually user configurable to either a logic input, logic
output, or common-anode (CA) LED constant-current
segment driver. Each port configured as an LED seg-
ment driver behaves as a digitally controlled constant-
current sink, with 16 equal current steps from 1.5mA to
24mA. The LED drivers are suitable for both discrete
LEDs and CA numeric and alphanumeric LED digits.
Each port configured as a GPIO can be either a push-
pull logic output capable of sinking 10mA and sourcing
4.5mA, or a Schmitt logic input with optional internal
pullup. Seven ports feature configurable transition
detection logic, which generates an interrupt upon
change of port logic level. The MAX6957 is controlled
through an SPI™-compatible 4-wire serial interface.
The MAX6957AAX and MAX6957ATL have 28 ports and
are available in 36-pin SSOP and 40-pin TQFN (6mm x
6mm) packages, respectively. The MAX6957AAI and
MAX6957ANI have 20 ports and are available in 28-pin
SSOP and 28-pin DIP packages, respectively.
For a 2-wire interfaced version, refer to the MAX6956
data sheet.
For a lower cost pin-compatible port expander without
the constant-current LED drive capability, refer to the
MAX7301 data sheet.
2.5V to 5.5V Operation
-40°C to +125°C Temperature Range
20 or 28 I/O Ports, Each Configurable as
Constant-Current LED Driver
Push-Pull Logic Output
Schmitt Logic Input
Schmitt Logic Input with Internal Pullup
11µA (max) Shutdown Current
16-Step Individually Programmable Current
Control for Each LED
Logic Transition Detection for Seven I/O Ports
Features
High-Speed 26MHz SPI-/QSPI-™/MICROWIRE™-
Compatible Serial Interface
MAX6957
Ordering Information
PART
MAX6957ANI
MAX6957AAI
MAX6957AAX
MAX6957ATL
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
28 DIP
28 SSOP
36 SSOP
40 Thin QFN
PKG
CODE
N28-2
A28-1
A36-4
T4066-5
Pin Configurations
TOP VIEW
ISET 1
GND 2
GND 3
DOUT 4
P12 5
P13 6
P14 7
P15 8
P16 9
P17 10
P18 11
P19 12
P20 13
28 V+
27 CS
26 DIN
25 SCLK
24 P31
23 P30
Applications
Set-Top Boxes
Panel Meters
White Goods
Automotive
Bar Graph Displays
Industrial Controllers
System Monitoring
MAX6957
22 P29
21 P28
20 P27
19 P26
18 P25
17 P24
16 P23
15 P22
Typical Operating Circuit appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
P21 14
SSOP/DIP
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

MAX6957AAI+ Related Products

MAX6957AAI+ MAX6957AGL+ MAX6957AAX+T MAX6957AAX+
Description led display drivers 2.5-5.5V 20/28port led display driver led display drivers 2.5-5.5V 20/28port led display driver led display drivers 2.5-5.5V 20/28port led display driver led display drivers 2.5-5.5V 20/28port led display driver
Is it lead-free? Lead free Lead free Lead free Lead free
Is it Rohs certified? conform to conform to conform to conform to
package instruction SOP, SSOP28,.3 QCCN, LCC40,.24SQ,20 SOP, SOP36,.4,32 SOP, SOP36,.4,32
Reach Compliance Code compliant compli compli compliant
ECCN code EAR99 EAR99 EAR99 EAR99
Other features COMMON-ANODE COMMON-ANODE COMMON-ANODE COMMON-ANODE
display mode SEGMENT SEGMENT SEGMENT SEGMENT
JESD-30 code R-PDSO-G28 S-PQCC-N40 R-PDSO-G36 R-PDSO-G36
JESD-609 code e3 e3 e3 e3
Number of digits/characters 7-DIGIT 7-DIGIT 7-DIGIT 7-DIGIT
Number of segments 20 7 28 28
Number of terminals 28 40 36 36
Maximum operating temperature 125 °C 125 °C 125 °C 125 °C
Minimum operating temperature -40 °C -40 °C -40 °C -40 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP QCCN SOP SOP
Encapsulate equivalent code SSOP28,.3 LCC40,.24SQ,20 SOP36,.4,32 SOP36,.4,32
Package shape RECTANGULAR SQUARE RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE CHIP CARRIER SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) 260 NOT SPECIFIED 260 260
power supply 3/5 V 3/5 V 3/5 V 3/5 V
Certification status Not Qualified Not Qualified Not Qualified Not Qualified
surface mount YES YES YES YES
technology CMOS CMOS CMOS CMOS
Temperature level AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE
Terminal surface Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn) Matte Tin (Sn)
Terminal form GULL WING NO LEAD GULL WING GULL WING
Terminal pitch 0.65 mm 0.5 mm 0.8 mm 0.8 mm
Terminal location DUAL QUAD DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
Base Number Matches 1 1 1 1
Maker Maxim Maxim Maxim -
Parts packaging code SSOP - SSOP SSOP
Contacts 28 - 36 36
Factory Lead Time 6 weeks - 8 weeks 6 weeks
data entry mode SERIAL - SERIAL SERIAL
Interface integrated circuit type LED DISPLAY DRIVER - LED DISPLAY DRIVER LED DISPLAY DRIVER
length 10.2 mm - 15.415 mm 15.415 mm
Humidity sensitivity level 1 - 1 1
Multiplex display function NO - NO NO
Number of functions 1 - 1 1
Maximum seat height 1.99 mm - 2.64 mm 2.64 mm
Maximum supply voltage 5.5 V - 5.5 V 5.5 V
Minimum supply voltage 2.5 V - 2.5 V 2.5 V
Nominal supply voltage 3.3 V - 3.3 V 3.3 V
width 5.29 mm - 7.495 mm 7.495 mm
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