MAX7306AUB+ Maxim Integrated Products, MAX7306AUB+ Datasheet
MAX7306AUB+
Specifications of MAX7306AUB+
Related parts for MAX7306AUB+
MAX7306AUB+ Summary of contents
Page 1
... Cell Phones LCD/Keypad Backlights System I/O Ports LED Status Indicators SMBus is a trademark of Intel Corp. µMAX is a registered trademark of Maxim Integrated Products, Inc. +1. μC SDA SDA MAX7307 ...
Page 2
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) V ..........................................................................-0. SCL, SDA, AD0, and RST.................................-0. P1/INT, P2/OSCIN, P3/OSCOUT, and P4 MAX7306 ................................................-0.3V ...
Page 3
SMBus/I C Interfaced 4-Port, Level-Translating ELECTRICAL CHARACTERISTICS (MAX7307 1.62V to 3.6V MIN MAX PARAMETER Operating Supply Voltage Port Logic Supply Voltage Power-On Reset Voltage Power-On Reset Hysteresis Standby Current (Interface ...
Page 4
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers PORT, INTERRUPT (INT), AND RESET (RST) TIMING CHARACTERISTICS (V = 1.62V to 3.6V MIN MAX +25°C.) (Note 1) (See Figures 14, 15, and ...
Page 5
SMBus/I C Interfaced 4-Port, Level-Translating (V = 3.3V 3.3V, and T = +25°C, unless otherwise noted.) (MAX7307 QUIESCENT SUPPLY CURRENT vs. TEMPERATURE 0.70 INTERNAL OSCILLATOR OFF 0.65 0.60 0.55 0.50 0.45 0.40 -40 -25 ...
Page 6
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers PIN NAME MAX7306 MAX7307 RST P1/INT 3 3 GND 4 4 P2/OSCIN 5 5 P3/OSCOUT — — AD0 8 ...
Page 7
SMBus/I C Interfaced 4-Port, Level-Translating MAX7306/ MAX7307 SCL SDA MAX7306 ONLY REGISTER Detailed Description The MAX7306/MAX7307 4-port, general-purpose port expanders operate from a 1.62V to 3.6V power supply. Ports P2 through P4 can be configured as inputs, push- pull ...
Page 8
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers Table 1. Register Address Map REGISTER Port P1 or INT Output Port P2 or OSCIN Input Port P3 or OSCOUT Output Port P4 Configuration 26 Configuration 27 FACTORY RESERVED (Do ...
Page 9
SMBus/I C Interfaced 4-Port, Level-Translating Table 3. Configuration Register (0x26) REGISTER BIT DESCRIPTION Interrupt Status D7 Flag (Read-Only) Transition Flag D6 (Read-Only) D5 Reserved Blink Prescaler Bits D4, D3, D2 RST Timer D1 RST POR D0 *Default state. Table ...
Page 10
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers The MAX7307 is set to slave address 0x98 and the MAX7306 can be set to one of four I 0x98 to 0x9F, using the address input AD0 (see Table 5) ...
Page 11
SMBus/I C Interfaced 4-Port, Level-Translating PORT_[2] (DEBOUNCE) PORT_[0] 0 (PORTIN) 1 TRANSITION DETECTION INT Figure 1. Input Port Structure Table 7. Port I/O Registers (I/O Port Set as an Output, Registers 0x01 to 0x04) REGISTER BIT DESCRIPTION D7 Port ...
Page 12
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers 3-BIT PRESCALER CLOCK CONFIG26 [4:2] Figure 2. Output Port Structure V DD SELECT INPUT OUTPUT P1 Figure 3. Port I/O Structure Port Supplies and Level Translation The MAX7307 features a ...
Page 13
SMBus/I C Interfaced 4-Port, Level-Translating The MAX7306/MAX7307 sample the input ports every 31ms if input debouncing is enabled for an input port ( the port I/O register). The MAX7306/MAX7307 compare each new sample with the previous ...
Page 14
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers the host processor of data changes at the selected inputs. Reset INT by reading any port’s I/O registers (0x01 to 0x04). Upon power-up, the MAX7306/MAX7307 enter standby mode when the ...
Page 15
SMBus/I C Interfaced 4-Port, Level-Translating 0MHz TO 1MHz EXTERNAL P2/OSCIN OSCILLATOR 0MHz TO 1MHz EXTERNAL P2/OSCIN OSCILLATOR Figure 5. Synchronizing Multiple MAX7306s (External Clock) PWM and Blink Timing The MAX7306/MAX7307 divide the 32kHz nominal internal oscillator OSC or external ...
Page 16
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers PORT REGISTER VALUE 0b0X000000 OUTPUT STATIC LOW (STATIC LOGIC-LOW OUTPUT OR LED DRIVE ON) 0b0X000001 OUTPUT LOW 1/32 DUTY PWM 0b0X000010 OUTPUT LOW 2/32 DUTY PWM 0b0X000011 OUTPUT LOW 3/32 ...
Page 17
SMBus/I C Interfaced 4-Port, Level-Translating Table 8. PWM Settings on Output Ports PWM SETTING Port static logic-level low output port Port PWM output port; PWM duty cycle is 1/32 Port ...
Page 18
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers Serial Interface Serial Addressing The MAX7306/MAX7307 operate as a slave that sends 2 and receives data through an I C-compatible, 2-wire interface. The interface uses a serial-data line (SDA) and ...
Page 19
SMBus/I C Interfaced 4-Port, Level-Translating recipients. When the MAX7306/MAX7307 transmit to the master, the master generates the acknowledge bit because the master is the recipient. The MAX7306/MAX7307 have a 7-bit long slave address (Figure 12). The 8th bit following ...
Page 20
SMBus/I C Interfaced 4-Port, Level-Translating GPIOs and LED Drivers WRITE TO OUTPUT PORTS REGISTERS (P4 SCL SLAVE ADDRESS SDA START CONDITION P4–P1 Figure 14. ...
Page 21
SMBus/I C Interfaced 4-Port, Level-Translating nominally 31ms after the start of a valid serial transfer, the interface resets itself and sets up SDA as an input. The MAX7306/MAX7307 then waits for another START condition. Applications Information Serial interfaces SDA, ...
Page 22
... MAX7306/ MAX7307 + μDFN Ordering Information (continued) PART TOP MARK PIN-PACKAGE MAX7306AUB+ AAAO 10 µMAX-EP* MAX7307ALB+ AAK 10 µDFN (2mm x 2mm) MAX7307AUB+ AAAN 10 µMAX-EP* Note: All devices are specified over the -40°C to +125°C oper- ating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. 22 ______________________________________________________________________________________ ...
Page 23
... 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 ____________________ 23 © 2010 Maxim Integrated Products ...