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MAX6956AAX/V+T

更新时间: 2024-11-05 13:11:03
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MAX6956AAX/V+T 数据手册

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19-2414; Rev 2; 11/03  
2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or  
28-Port LED Display Driver and I/O Expander  
General Description  
Features  
o 400kbps I2C-Compatible Serial Interface  
The MAX6956 compact, serial-interfaced LED display  
driver/I/O expander provide microprocessors with up to  
28 ports. Each port is individually user configurable to  
either a logic input, logic output, or common-anode  
(CA) LED constant-current segment driver. Each port  
configured as an LED segment 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 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 general-purpose I/O (GPIO)  
can be either a push-pull logic output capable of sink-  
ing 10mA and sourcing 4.5mA, or a Schmitt logic input  
with optional internal pullup. Seven ports feature config-  
urable transition detection logic, which generates an  
interrupt upon change of port logic level. The MAX6956  
is controlled through an I2C™-compatible 2-wire serial  
interface, and uses four-level logic to allow 16 I2C  
addresses from only 2 select pins.  
o 11µA (max) Shutdown Current  
o 16-Step Individually Programmable Current  
Control for Each LED  
o Logic Transition Detection for Seven I/O Ports  
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  
The MAX6956AAX and MAX6956ATL have 28 ports  
and are available in 36-pin SSOP and 40-pin thin QFN  
packages, respectively. The MAX6956AAI and  
MAX6956ANI have 20 ports and are available in 28-pin  
SSOP and 28-pin DIP packages, respectively.  
MAX6956ANI  
MAX6956AAI  
MAX6956AAX  
MAX6956ATL  
28 SSOP  
36 SSOP  
40 Thin QFN  
For an SPI-interfaced version, refer to the MAX6957  
data sheet. For a lower cost pin-compatible port  
expander without the constant-current LED drive capa-  
bility, refer to the MAX7300 data sheet.  
Pin Configurations  
TOP VIEW  
Applications  
ISET  
GND  
GND  
AD0  
P12  
P13  
P14  
P15  
P16  
1
2
3
4
5
6
7
8
9
28 V+  
Set-Top Boxes  
Panel Meters  
White Goods  
Automotive  
Bar Graph Displays  
Industrial Controllers  
System Monitoring  
27 AD1  
26 SCL  
25 SDA  
24 P31  
MAX6956  
23 P30  
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.  
P17 10  
P18 11  
P19 12  
P20 13  
P21 14  
Purchase of I2C components of Maxim Integrated Products, Inc.,  
or one of its sublicensed Associated Companies, conveys a  
license under the Philips I2C Patent Rights to use these compo-  
nents in an I2C system, provided that the system conforms to the  
I2C Standard Specification as defined by Philips.  
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.  

MAX6956AAX/V+T 替代型号

型号 品牌 替代类型 描述 数据表
MAX7300AAX+T MAXIM

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