MAX7313 Maxim, MAX7313 Datasheet
MAX7313
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MAX7313 Summary of contents
Page 1
... Alternatively, the cur- rent control can be configured as a single 8-bit control that sets all outputs at once. The MAX7313 is pin and software compatible with the MAX7311, PCA9535, and PCA9555. Each output has independent blink timing with two blink phases ...
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... Maximum GND Current ....................................................350mA 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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I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection ELECTRICAL CHARACTERISTICS (continued) (Typical Operating Circuit 3.6V, T (Note 1) PARAMETER SYMBOL Output Low Voltage V P0–P15, INT/O16 Output Low-Voltage SDA V OLSDA PWM Clock ...
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I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection TIMING CHARACTERISTICS (continued) (Typical Operating Circuit 3.6V, T (Note 1) PARAMETER Interrupt Valid Interrupt Reset Output Data Valid Input Data Setup Time Input Data Hold ...
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... PWM CLOCK FREQUENCY vs. TEMPERATURE 1.050 1.025 V+ = 3.6V 1.000 0.975 V+ = 2.7V 0.950 0.925 NORMALIZED 3.3V, T 0.900 95 110 125 -40 -25 - TEMPERATURE (°C) SINK CURRENT vs. V MAX7313 toc08 0.35 0.30 OUTPUT 2V/div 0. 2.7V 0. 3.3V 0.15 OUTPUT 2 2V/div 0.10 0.05 ONLY ONE OUTPUT LOADED SINK CURRENT (mA +25°C A ...
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... MAX7313’s supply voltage. The MAX7313 is rated for a ground current of 350mA, allowing all 17 outputs to sink 20mA at the same time. Figure 1 shows the output structure of the MAX7313. The ports default to inputs on power-up. Port Inputs and Transition Detection Input ports registers reflect the incoming logic levels of ...
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... MAX7313 and generates the SCL clock that synchronizes the data transfer (Figure 2). The MAX7313 SDA line operates as both an input and an open-drain output. A pullup resistor, typically 4.7kΩ, is required on SDA. The MAX7313 SCL line operates ...
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... AD0, AD1, and AD2. These pins can be connected to GND, V+, SDA, or SCL. The MAX7313 has 64 possible slave addresses (Table 1) and, there- fore, a maximum of 64 MAX7313 devices can be con- trolled independently from the same interface. CLOCK PULSE A write to the MAX7313 comprises the transmission of the MAX7313’ ...
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... I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection 2 Table 1. MAX7313 I C Slave Address Map PIN AD2 PIN AD1 PIN AD0 GND SCL GND GND SCL V+ GND SDA GND GND SDA V+ V+ SCL GND V+ SCL V+ V+ SDA GND V+ SDA V+ GND ...
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... I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection 2 Table 1. MAX7313 I C Slave Address Map (continued) PIN AD2 PIN AD1 PIN AD0 SCL SCL GND SCL SCL V+ SCL SDA GND SCL SDA V+ SDA SCL GND SDA SCL V+ SDA SDA GND ...
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... This is because it is possible for master 2 to take over the bus after master 1 has set up the MAX7313’s address pointer but before master 1 has read the data. If master 2 subsequently changes the MAX7313’s address pointer, then master 1’ ...
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... IV Figure 10. Read, Write, and Interrupt Timing Diagrams Command Address Autoincrementing The command address stored in the MAX7313 circu- lates around grouped register functions after each data byte is written or read (Table 2 device reset input is needed, consider the MAX7314. The MAX7314 includes a RST input, which ...
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... The input status of all ports are sampled immediately Input Ports after power-up as part of the MAX7313’s internal initial- ization all the ports are pulled to valid logic levels at that time an interrupt does not occur at power-up. The INT/O16 output pin can be configured as either the INT output that reflects the interrupt flag logic state general-purpose output O16 ...
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I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 3. Power-Up Configuration REGISTER FUNCTION POWER-UP CONDITION Blink phase 0 outputs P7–P0 High-impedance outputs Blink phase 0 outputs P15–P8 High-impedance outputs Ports configuration P7–P0 Ports P7–P0 are inputs ...
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I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 4. Configuration Register (continued) REGISTER CONFIGURATION Write device configuration Read back device configuration Disable global intensity control—intensity is set by registers 0x10–0x17 for ports P0 through P15 when ...
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I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 5. Ports Configuration Registers REGISTER Ports configuration P7– input output) Read back ports configuration P7–P0 Ports configuration P15– input output) ...
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... When all outputs are to be used with the same PWM setting, the outputs can be controlled together instead using the global intensity control (Table 13). Table 10 shows how to set up the MAX7313 to suit a particular application. The PWM control uses a 240-step PWM period, divided into 15 master intensity timeslots ...
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I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 10. PWM Application Scenarios APPLICATION All outputs static without PWM A mix of static and PWM outputs, with PWM outputs using different PWM settings A mix of static ...
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I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection MASTER INTENSITY TIMESLOT Figure 15. Individual (or Global) Set to 1/16 MASTER INTENSITY TIMESLOT Figure ...
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... I/O ports P0–P15, interrupt output INT/016, and serial interface SDA, SCL, AD0–2 remain high impedance with asserted on them when the MAX7313 is powered down (V+ = 0V). The MAX7313 can therefore be used in hot-swap applications. The open-drain output architecture allows the ports to level translate the outputs to higher or lower voltages than the MAX7313 supply ...
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... MAX7313, and the MAX7313’s PWM and blink functionality is not supported in the MAX7311. Software compatibility is clearly not 100%, but the MAX7313 was designed so the subset (omitted) features default to the same power-up behavior as the MAX7311, PCA9535, and PCA9555, and superset features do not use existing registers in a different way ...
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I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 14. Output Intensity Registers REGISTER OUTPUTS P1, P0 INTENSITY Write output P1, P0 intensity Read back output P1, P0 intensity Output P1 intensity duty cycle is 1/16 Output ...
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... OUTPUT P14 INTENSITY P15I1 P15I0 P14I3 P14I2 P14I1 MAX7311, PCA9535, PCA9555 COMMENTS IMPLEMENTATION Same functionality Same functionality If polarity inversion feature is unused, MAX7313 defaults to correct state Same functionality Power-up default disables the blink and intensity (PWM) features D0 LSB P810 LSB P10I0 LSB P12I0 ...
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... I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection Driving Load Currents Higher than 50mA The MAX7313 can be used to drive loads drawing more than 50mA, like relays and high-current white LEDs, by paralleling outputs. Use at least one output per 50mA of load current; for example 330mW relay draws 66mA and needs two paralleled outputs to drive it ...
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... AD2 MAX7313AEG GND 12 QSOP ______________________________________________________________________________________ 5V 3. SDA MAX7313 P2 P3 SCL P4 P5 INT/O16 AD0 P9 INPUT 1 AD1 P10 INPUT 2 AD2 P11 INPUT 3 P12 INPUT 4 P13 INPUT 5 5V 3.3V P14 GND P15 OUTPUT 10 OUTPUT 11 PROCESS: BiCMOS ...
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... Added lead(Pb)-free parts to Ordering Information and corrected error in Table 9 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. ...