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MAX6957AAI

更新时间: 2024-09-14 22:55:15
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23页 333K
描述
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander

MAX6957AAI 数据手册

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19-2429; Rev 0; 4/02  
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and  
28-Port LED Display Driver and I/O Expander  
General Description  
Features  
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.  
o High-Speed 26MHz SPI-/QSPI-™/MICROWIRE™-  
Compatible Serial Interface  
o 2.5V to 5.5V Operation  
o -40°C to +125°C Temperature Range  
o 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  
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.  
o 11µA (max) Shutdown Current  
o 16-Step Individually Programmable Current  
Control for Each LED  
o Logic Transition Detection for Seven I/O Ports  
The MAX6957AAX and MAX6957AGL have 28 ports and  
are available in 36-pin SSOP and 40-pin QFN packages,  
respectively. The MAX6957AAI and MAX6957ANI have  
20 ports and are available in 28-pin SSOP and 28-pin DIP  
packages, respectively.  
Ordering Information  
PART  
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  
MAX6957ANI  
MAX6957AAI  
MAX6957AAX  
MAX6957AGL*  
28 SSOP  
36 SSOP  
40 QFN  
Applications  
Set-Top Boxes  
Panel Meters  
*Future product—contact factory for availability.  
Pin Configurations  
White Goods  
TOP VIEW  
Automotive  
Bar Graph Displays  
Industrial Controllers  
System Monitoring  
ISET  
GND  
GND  
DOUT  
P12  
1
2
3
4
5
6
7
8
9
28 V+  
27 CS  
DIN  
26  
25  
SCLK  
24 P31  
23 P30  
22 P29  
21 P28  
20 P27  
19 P26  
18 P25  
17 P24  
16 P23  
15 P22  
P13  
P14  
MAX6957  
Typical Operating Circuit appears at end of data sheet.  
P15  
P16  
P17 10  
P18 11  
P19 12  
P20 13  
P21 14  
SPI and QSPI are trademarks of Motorola, Inc.  
MICROWIRE is a trademark of National Semiconductor Corp.  
SSOP/DIP  
Pin Configurations continued at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
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 替代型号

型号 品牌 替代类型 描述 数据表
MAX6957AAI+T MAXIM

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LED Driver, 20-Segment, CMOS, PDSO28, 5.30 MM, MO-150, SSOP-28
MAX6957AAI+ MAXIM

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LED Driver, 20-Segment, CMOS, PDSO28, 5.30 MM, MO-150, SSOP-28

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MAX6957AAX-T MAXIM

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MAX6957AGL MAXIM

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MAX6957AGL+ MAXIM

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MAX6957AGL-T MAXIM

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