MAX6956AAX Maxim Integrated Products, MAX6956AAX Datasheet
MAX6956AAX
Specifications of MAX6956AAX
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MAX6956AAX Summary of contents
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... C-compatible 2-wire serial interface, and uses four-level logic to allow 16 I addresses from only 2 select pins. 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 ...
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LED Display Driver and I/O Expander ABSOLUTE MAXIMUM RATINGS Voltage (with Respect to GND) V+ .............................................................................-0.3V to +6V SCL, SDA, AD0, AD1................................................-0.3V to +6V All Other Pins................................................-0.3V to (V+ + 0.3V) P4–P31 Current ...
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LED Display Driver and I/O Expander ELECTRICAL CHARACTERISTICS (continued) ( Typical Operating Circuit , V+ = 2.5V to 5.5V, T PARAMETER SYMBOL Port Drive LED Sink Current, I Port Configured as LED Driver ...
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LED Display Driver and I/O Expander __________________________________________Typical Operating Characteristics (R = 39kΩ +25°C, unless otherwise noted.) ISET A OPERATING SUPPLY CURRENT vs. TEMPERATURE 0. 2.5V TO 5.5V 0.36 NO ...
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... P31, individually as either LED drivers or GPIO. A pair of bits in registers 0x09 through 0x0F sets each port’s configuration (Tables 1 and 2). The 36-pin MAX6956AAX has 28 ports P31. The 28-pin MAX6956ANI and MAX6956AAI make only 20 ports available, P12 to P31. The eight unused ports should be configured as outputs on power-up by writ- ing 0x55 to registers 0x09 and 0x0A ...
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LED Display Driver and I/O Expander Table 1. Port Configuration Map REGISTER Port Configuration for P7, P6, P5, P4 Port Configuration for P11, P10, P9, P8 Port Configuration for P15, P14, P13, P12 ...
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LED Display Driver and I/O Expander P4 TO P31 LED DRIVERS AND GPIO LED DRIVERS OR GPIO SEGMENT OR GPIO DATA 8 AD0 ADDRESS MATCHER AD1 7-BIT DEVICE ...
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LED Display Driver and I/O Expander SDA t SU, DAT t LOW SCL t HIGH t HD, STA t R START CONDITION Figure 2. 2-Wire Serial Interface Timing Details SDA S SCL START ...
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LED Display Driver and I/O Expander START CONDITION SCL SDA BY TRANSMITTER S SDA BY RECEIVER Figure 5. Acknowledge SDA 1 0 MSB SCL Figure 6. Slave Address MAX6956 is the recipient. When ...
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LED Display Driver and I/O Expander 7-SEGMENT DIGIT 1 VIRTUAL SEGMENTS P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 P21 ...
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LED Display Driver and I/O Expander HOW COMMAND BYTE AND DATA BYTE MAP INTO MAX6956's REGISTER ACKNOWLEDGE FROM MAX6956 S SLAVE ADDRESS Figure 10. n Data Bytes Received Table 3. MAX6956 Address Map ...
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LED Display Driver and I/O Expander Table 5. Register Address Map REGISTER No-Op Global Current Configuration Transition Detect Mask Display Test Port Configuration P7, P6, P5, P4 Port Configuration P11, P10, P9, P8 ...
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LED Display Driver and I/O Expander Table 5. Register Address Map (continued) REGISTER Port 11 only (data bit D0; D7–D1 read as 0) Port 12 only (data bit D0; D7–D1 read as 0) ...
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LED Display Driver and I/O Expander Table 5. Register Address Map (continued) REGISTER 8 ports 16–23 (data bits D0–D7) 8 ports 17–24 (data bits D0–D7) 8 ports 18–25 (data bits D0–D7) 8 ports ...
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LED Display Driver and I/O Expander Table 6. Power-Up Configuration REGISTER POWER-UP CONDITION FUNCTION Port Register LED Off; GPIO Output Low Bits Global 1/16 (minimum on) Current Shutdown Enabled Configuration ...
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LED Display Driver and I/O Expander Table 7. Configuration Register Format ADDRESS CODE FUNCTION (HEX) Configuration Register 0x04 Table 8. Shutdown Control (S Data Bit D0) Format ADDRESS CODE FUNCTION (HEX) Shutdown 0x04 ...
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LED Display Driver and I/O Expander Table 11. Global Segment Current Register Format LED DRIVE TYPICAL SEGMENT FRACTION CURRENT (mA) 1/16 1.5 2/16 3 3/16 4.5 4/16 6 5/16 7.5 6/16 9 7/16 ...
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LED Display Driver and I/O Expander Table 12. Individual Segment Current Registers REGISTER ADDRESS FUNCTION CODE (HEX) Current054 register 0x12 Current076 register 0x13 Current098 register 0x14 Current0BA register 0x15 Current0DC register 0x16 Current0FE ...
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LED Display Driver and I/O Expander Table 14. Odd Individual Segment Current Format SEGMENT LED CONSTANT DRIVE CURRENT WITH FRACTION R = 39kΩ (mA) ISET 1/16 1.5 2/16 3 3/16 4.5 4/16 6 ...
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LED Display Driver and I/O Expander P31 GPIO INPUT CONDITIONING P30 GPIO/PORT OUTPUT LATCH GPIO INPUT CONDITIONING P29 GPIO/PORT OUTPUT LATCH GPIO INPUT CONDITIONING P28 GPIO/PORT OUTPUT LATCH GPIO INPUT CONDITIONING P27 GPIO/PORT ...
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LED Display Driver and I/O Expander Table 15. Transition Detection Mask Register REGISTER READ/ FUNCTION ADDRESS WRITE (HEX) Read Mask 0x06 Register Write * INT is automatically cleared after it is read. Table ...
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... P29 P18 25 16 P28 P19 24 17 P27 P20 18 23 P26 P21 22 19 P25 P22 21 20 P24 P23 GND MAX6956AAX GND ISET 7 39kΩ P10 35 11 AD1 P11 4 6 AD0 P12 33 8 SDA P13 34 10 SCL P14 12 P15 31 13 P31 P16 ...
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LED Display Driver and I/O Expander TOP VIEW ISET 1 GND 2 GND 3 AD0 MAX6956 P12 P13 8 P10 9 P14 10 P11 11 P15 12 ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...