MAX7301AAI MAXIM [Maxim Integrated Products], MAX7301AAI Datasheet
MAX7301AAI
Available stocks
Related parts for MAX7301AAI
MAX7301AAI Summary of contents
Page 1
... SPI™-compatible 4-wire serial interface. The MAX7301AAX and MAX7301AGL have 28 ports and are available in 36-pin SSOP and 40-pin QFN packages, respectively. The MAX7301AAI and MAX7301ANI 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 MAX7300 data sheet ...
Page 2
I/O Expander ABSOLUTE MAXIMUM RATINGS Voltage (with respect to GND) V+ .............................................................................-0.3V to +6V All Other pins................................................-0.3V to (V+ + 0.3V) P4–P31 Current ................................................................±30mA GND Current .....................................................................800mA Continuous Power Dissipation (T = +70°C) ...
Page 3
ELECTRICAL CHARACTERISTICS (continued) (Typical Operating Circuit 2.5V to 5.5V, T PARAMETER SYMBOL Port Sink Current Output Short-Circuit Current Input High-Voltage SCLK, DIN, CS Input Low-Voltage SCLK, DIN, CS Input Leakage Current SCLK, ...
Page 4
I/O Expander __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted.) A OPERATING SUPPLY CURRENT vs. TEMPERATURE 0. 2.5V TO 5.5V 0.36 NO LOAD 0.32 0.28 ALL PORTS ALL PORTS OUTPUT ...
Page 5
... The 36-pin MAX7301AAX has 28 ports P31. The 28-pin MAX7301ANI and MAX7301AAI 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. If this is not done, ...
Page 6
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 Port Configuration for P19, ...
Page 7
P4 TO P31 GPIO GPIO DATA DIN SCLK Figure 1. MAX7301 Functional Diagram The MAX7301 is written to using the following sequence: 1) Take SCLK low. ...
Page 8
I/O Expander CS t CSS t CSH SCLK DIN DOUT Figure 2. 4-Wire Interface Initial Power-Up On initial power-up, all control registers are reset, and the MAX7301 enters shutdown ...
Page 9
MICROCONTROLLER SERIAL DATA INPUT SERIAL CS OUTPUT SERIAL CLOCK OUTPUT SERIAL DATA OUTPUT Figure 3. Daisy-Chain Arrangement for Controlling Multiple MAX7301s CS SCLK D15 DIN D14 D13 D12 = 0 DOUT Figure 4. Transmission ...
Page 10
I/O Expander Table 3. Register Address Map REGISTER No-Op Configuration Transition Detect Mask Factory Reserved. Do not write to this. Port Configuration P7, P6, P5, P4 Port Configuration P11, P10, P9, P8 Port ...
Page 11
Table 3. Register Address Map (continued) REGISTER Port 26 only (data bit D0. D7–D1 read as 0) Port 27 only (data bit D0. D7–D1 read as 0) Port 28 only (data bit D0. D7–D1 ...
Page 12
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 OUTPUT LATCH GPIO INPUT ...
Page 13
Table 4. Power-Up Configuration REGISTER POWER-UP CONDITION FUNCTION Port Register GPIO Output Low Bits Configuration Shutdown Enabled Register Transition Detection Disabled Input Mask All Clear (Masked Off) Register Port P7, P6, ...
Page 14
I/O Expander Table 7. Transition Detection Control (M Data Bit D7) Format ADDRESS CODE FUNCTION (HEX) Disabled 0x04 Enabled 0x04 Table 8. Transition Detection Mask Register REGISTER READ/ FUNCTION ADDRESS WRITE (HEX) Read ...
Page 15
TOP VIEW ISET 1 36 GND 2 35 GND 3 34 DOUT P12 MAX7301 P13 8 29 P10 9 28 P14 10 27 P11 ...
Page 16
I/O Expander (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages NOTES: 1. D&E DO NOT INCLUDE ...
Page 17
For the latest package outline information www.maxim-ic.com/packages.) U ______________________________________________________________________________________ 28-Port I/O Expander Package Information (continued) 17 ...
Page 18
I/O Expander (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages TOP VIEW FRONT ...