MAX7316 Maxim, MAX7316 Datasheet
MAX7316
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MAX7316 Summary of contents
Page 1
... BLINK register. The BLINK input can also be used as a logic control to turn the LEDs on and off general-purpose input. The MAX7316 supports hot insertion. All port pins, the INT output, SDA, SCL, RST, BLINK, and the slave address input ADO remain high impedance in power- down (V+ = 0V) with asserted upon them ...
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... Maximum GND Current ....................................................190mA 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 OL P0–P7, INT/O8 Output Low-Voltage SDA V OLSDA PWM ...
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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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... 0 2.7V 0 -40 -25 - 110 TEMPERATURE (°C) SCOPE SHOT OF 2 OUTPUT PORTS MAX7316 toc08 MASTER INTENSITY SET TO 14/15 OUTPUT 1 2V/div OUTPUT 1 INDIVIDUAL INTENSITY SET TO 1/16 OUTPUT 2 2V/div OUTPUT 2 INDIVIDUAL INTENSITY SET TO 14/15 2ms/div PWM CLOCK FREQUENCY vs. TEMPERATURE 1.050 1.025 V+ = 3.6V 1.000 0.975 V+ = 2.7V ...
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... K put ports sink loads up to 50mA connected to external supplies up to 5.5V, independent of the MAX7316’s supply voltage. The MAX7316 is rated for a ground cur- rent of 190mA, allowing all nine outputs to sink 20mA at the same time. Figure 1 shows the output structure of the MAX7316. The ports default to inputs on power-up. ...
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... The MAX7316 includes an internal oscillator, nominally 32kHz, to generate PWM timing for LED intensity control. PWM intensity control can be enabled on an output-by- output basis, allowing the MAX7316 to provide any mix of PWM LED drives and glitch-free logic outputs (Table 10). PWM can be disabled entirely, in which case all out- put ports are static and the MAX7316 operating current is lowest because the internal oscillator is turned off ...
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... The MAX7316 has a 7-bit long slave address (Figure 6). The eighth bit following the 7-bit slave address is the R/W bit. The R/W bit is low for a write command, high for a read command. ...
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... MAX7316 slave address are always and 0. Slave address bits A6 and A2 are selected by the address input AD0. AD0 can be con- nected to GND, V+, SDA, or SCL. The MAX7316 has four possible slave addresses (Table 1), and therefore a maximum of four MAX7316 devices can be controlled independently from the same interface ...
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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 MAX7316’s address pointer but before master 1 has read the data. If master 2 subsequently changes the MAX7316’s address pointer, then master 1’ ...
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... Outputs intensity P5, P4 Outputs intensity P7, P6 The reset input RST is an active-low input. When taken low, RST clears any transaction to or from the MAX7316 on the serial interface and configures the internal regis- ters to the same state as a power-up reset (Table 3). ...
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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 Ports configuration P7–P0 Blink phase 1 outputs P7–P0 High-impedance outputs PWM oscillator is disabled; ...
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I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 4. Configuration Register REGISTER CONFIGURATION Write device configuration Read back device configuration Disable blink Enable blink Flip blink register (see text) Disable global intensity control—intensity is set by ...
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... PWM timing for LED intensity con- trol or other applications such as PWM trim DACs. PWM can be disabled entirely for all the outputs. In this case, all outputs are static and the MAX7316 operating current is lowest because the internal PWM oscillator is turned off. ...
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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 MAX7316 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 ports P0-P7, interrupt output INT/O8, RST input, BLINK input, and serial interface SDA, SCL, AD0 remain high impedance with asserted on them when the MAX7316 is powered down (V+ =0V). The MAX7316 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 MAX7316 supply ...
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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 16. Individual (or Global) Set to 1/16 MASTER INTENSITY TIMESLOT ...
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... Phase 1: LED off continuously Driving Load Currents Higher than 50mA The MAX7316 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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... The MAX7316 operates with a power-supply voltage 3.6V. Bypass the power supply to GND with at least 0.047µF as close to the device as possible. For the QFN version, connect the underside exposed pad to GND. REGISTER DATA D4 D3 ...
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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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... AD0 GND Figure 19. Diode-Protected Switching Inductive Load 22 ______________________________________________________________________________________ Pin Configurations (continued) 5V TOP VIEW BAS16 TRANSISTOR COUNT: 17,611 PROCESS: BiCMOS BLINK RST 2 15 SDA AD0 3 14 SCL INT/08 MAX7316AEE GND QSOP Chip Information ...
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... I/O Expander with LED Intensity Control, Interrupt, and Hot-Insertion Protection (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.) ______________________________________________________________________________________ Package Information 23 ...
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... NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY. 12. WARPAGE NOT TO EXCEED 0.10mm. 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. ...