MAX6967ATE+ Maxim Integrated Products, MAX6967ATE+ Datasheet
MAX6967ATE+
Specifications of MAX6967ATE+
Related parts for MAX6967ATE+
MAX6967ATE+ Summary of contents
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... Cellular Phones SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ High-Speed 26MHz SPI-™/QSPI-™/MICROWIRE™- Compatible Serial Interface ♦ ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control ABSOLUTE MAXIMUM RATINGS Voltage (with respect to GND) V+ .............................................................................-0.3V to +4V SCLK, DIN, CS, DOUT/OSC.........................-0.3V to (V+ + 0.3V) P_ .............................................................................-0.3V to +8V DC Current into P_ .............................................................24mA ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control ELECTRICAL CHARACTERISTICS (continued) (Typical Operating Circuit 2.25V to 3.6V, T +25°C.) (Note 1) PARAMETER SYMBOL Input High Voltage (P0–P9, DIN, SCLK, CS, OSC) Input Low Voltage (P0–P9, ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control TIMING CHARACTERISTICS (Typical Operating Circuit 2.25V to 3.6V, T +25°C.) (Note 1) PARAMETER SYMBOL Internal PWM Clock Frequency External PWM Clock Frequency f SCLK Clock Period SCLK ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control (T = +25°C, unless otherwise noted.) A STANDBY CURRENT (I ) STBY1 vs. TEMPERATURE 1.2 1 3.6V 1 3.3V 0 2.7V 0.8 0.7 ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control PIN NAME QSOP TQFN Serial-Clock Input. On SCLK’s rising edge, data shifts into the internal shift register. On SCLK’ SCLK falling edge, data is clocked out of ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control The tradeoff for LED intensity control is between depth of current-control resolution, noise constraints, and software complexity: • For high LED resolution where each LED needs individual intensity settings, ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control 8-BIT LATCH OUTPUT PORT REGISTER 1-BIT LATCH OUTPUT CURRENT TO/FROM REGISTER SERIAL INTERFACE 3-BIT LATCH GLOBAL CURRENT REGISTER Figure 1. Simplified Schematic of I/O Ports Figure 1 shows the ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control If a port is changed from static logic low (0x00) or static logic high (0x01 constant-current value (0x02–0xFE) in shutdown mode, then that output is automatically turned ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Register Structure The MAX6966/MAX6967 contain 16 internal registers, addressed as 0x00–0x09, and 0x10–0x15, which con- figure and control the peripheral addresses, 0x0E and 0x0F, do not store data but ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control On power-up, all control registers are reset Power-up status sets I/O ports high imped- ance, and puts the device into shutdown mode. This means that any ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control PWM Timing and Phasing A PWM period comprises 256 cycles of the nominal 32kHz PWM clock (Figure 2). Ports can be set individu- ally to a PWM duty between ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Table 4. Configuration Register REGISTER CONFIGURATION Write device configuration Read-back device configuration Shutdown mode (CS run disabled) Put or keep device in shutdown, disable CS run Shutdown mode (CS ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control The stagger bit is ideally set or cleared when the MAX6966/MAX6967 are in shutdown. If not, there may be a perceived transient flicker in any PWM-controlled LEDs because the ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Table 6. Output Registers Format REGISTER PORT P0 LEVEL OR PWM Port P0 is static-low logic-level logic port with logic input buffer enabled; reading this port returns 0. Still ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Table 6. Output Registers Format (continued) REGISTER Port P1 level or PWM Port P2 level or PWM Port P3 level or PWM Port P4 level or PWM Port P5 ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Output Current Registers Each output port’s individual constant-current sink can be set to be either half or full global current. The indi- vidual currents are set by the output ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Table 8. Global Current Register Format REGISTER GLOBAL CURRENT Full current is 2.5mA; half current is 1.25mA Full current is 5mA; half current is 2.5mA Full current is 7.5mA; ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control The ramp-down register sets the hold-off and fade-off times and allows hold-off and fade-off to be disabled (zero delay), if desired (Table 9). The ramp-up register sets the ramp-up ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Table 10. Ramp-Up Register Format REGISTER Write ramp-up Read ramp-up Ramp-up time (f = 32768Hz) PWM Instant full current coming out from shutdown 1/16s ramp-up to full current coming ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Serial Interface The MAX6966/MAX6967 communicate through an SPI- compatible 4-wire serial interface. The interface has three inputs: clock (SCLK), chip select (CS), and data in (DIN), and one output, ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Alternatively, the MAX6966/MAX6967s can be daisy- chained by connecting the DOUT of one device to the DIN of the next, and driving SCLK and CS lines in paral- lel ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control The MAX6966/MAX6967 are written to using the follow- ing sequence (Figure 11): 1) Take SCLK low. 2) Take CS low. This enables the internal 16-bit shift reg- ister. 3) ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Applications Information The I/O ports P0–P9 remain high impedance with asserted on them when the MAX6966/MAX6967 are powered down (V+ = 0V). The MAX6966/MAX6967 can therefore ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control Figure 13 shows the typical current sunk by a LITEON LTST-C170TBKT 3.0V blue LED as the LED supply volt- age is varied from 2.5V to 7V. The LED currents ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control In run mode, the output port goes low, approaching 0V, as the port’s static constant current saturates trying to sink a higher current than the 220kΩ pullup resistor can ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control CURRENT REFERENCE INTERNAL OSCILLATOR EXTERNAL CLOCK INPUT OSC CONFIGURATION CLK CS DIN DOUT ______________________________________________________________________________________ RAMP-UP/RAMP-DOWN CONTROLS PWM CONTROLLER REGISTER I/O REGISTER 4-WIRE SERIAL INTERFACE TRANSISTOR COUNT: 14,865 PROCESS: BiCMOS ...
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Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control (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.) 28 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, ...
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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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 29 © 2005 Maxim Integrated Products ...