MAX7301 Maxim, MAX7301 Datasheet
MAX7301
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MAX7301 Summary of contents
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... The MAX7301 is controlled through an SPI™-compatible 4-wire serial interface. The MAX7301AAX and MAX7301ATL have 28 ports and are available in 36-pin SSOP and 40-pin TQFN packages, respectively. The MAX7301AAI has 20 ports and is avail- able in a 28-pin SSOP package. 2 For a 2-wire I C-interfaced version, refer to the MAX7300 data sheet ...
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... SSOP (derate 9.5mW/°C above +70°C) ...........762mW Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
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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, ...
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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 ...
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... P8, or P31 through P38 (P32 through P38 are nonexis- tent, so the instructions to these bits are ignored). When the MAX7301 is in shutdown mode, all ports are forced to inputs (which can be read), and the pullup current sources are turned off. Data in the port and ...
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... DIN propagates through the internal shift registers and appears at DOUT 15.5 clock cycles later, clocked out on the falling edge of SCLK. When sending commands to multiple MAX7301s, all devices are accessed at the same time. An access requires (16 where n is the number of MAX7301s connected togeth- er. To update just one device in a daisy-chain, the user can send the No-Op command (0x00) to the others ...
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... Any register data within the MAX7301 may be read by sending a logic high to bit D15. The sequence is: 1) Take SCLK low. 2) Take CS low (this enables the internal 16-bit Shift register). 3) Clock 16 bits of data into DIN—D15 first to D0 last. D15 is high, indicating a read command and bits D14 through D8 containing the address of the regis- ter to be read. Bits D7– ...
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... CL the configuration register is written with the M bit set, the MAX7301 updates an internal 7-bit snapshot regis- ter, which holds the comparison copy of the logic states of ports P24 through P30. The update action occurs regardless of the previous state of the M bit, so that it is not necessary to clear the M bit and then set it again to update the snapshot register ...
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... The MAX7301 operates with power-supply voltages of 2.5V to 5.5V. Bypass the power supply to GND with a 0.047µF capacitor as close to the device as possible. Add a 1µF capacitor if the MAX7301 is far away from the board’s input bulk decoupling capacitor. TRANSISTOR COUNT: 30,316 PROCESS: CMOS ...
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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... P24 17 20 P23 18 19 P22 36 SSOP Pin Configurations N. SCLK 32 19 DIN ISET 36 15 MAX7301 GND 37 14 GND 38 13 GND 39 12 DOUT TQFN N.C. P25 P24 P23 ...
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... 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 MOLD FLASH. 2. MOLD FLASH OR PROTRUSIONS NOT TO EXCEED .15 MM (.006"). ...
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... MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY. 12. NUMBER OF LEADS SHOWN FOR REFERENCE ONLY. 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. ...