MAXIM Manuals

The MAX7326 is a I2C multi-channel expander from MAXIM semiconductor, with 16 I/O ports, 12 of which are push-pull outputs and 4 of which are selectable internal pull-up inputs

The MAX7325 is a 2-wire serial-interfaced peripheral with 16 I/O ports. The ports are divided into eight push-pull outputs and eight I/Os with selectable internal pullups and transition detection. Eight ports are push-pull outputs and eight I/Os may be used as a logic input or an open-drain output. The ports are overvoltage protected to +6V. All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the INT output. The interrupt is latched, allowing detection of transient changes. When the MAX7325 is subsequently accessed through the serial interface, any pending interrupt is cleared. The open-drain outputs are rated to sink 20mA and are capable of driving LEDs. The RST input clears the serial interface, terminating any I2C communication to or from the MAX7325. The MAX7325 uses two address inputs with four-level logic to allow 16 I2C slave addresses. The slave address also determines the power-up logic state for the I/O ports and enables or disables internal 40kΩ pullups in groups of four ports. The MAX7325 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1). The MAX7325 is available in 24-pin QSOP and TQFN packages and is specified over the -40°C to +125°C automotive temperature range.

The MAX7320 is an eight-channel, I2C port expander featuring eight push-pull outputs with selectable power-up logic states.

The MAX7322 is a member of the MAX7322 family of devices, a 2-wire serial-interfaced peripheral with four push-pull outputs and four input ports with selectable internal pullups. Input ports are overvoltage protected to +6V and feature transition detection with interrupt output. The four input ports are continuously monitored for state changes (transition detection). The interrupt is latched, allowing detection of transient changes. Any combination of inputs can be selected using the interrupt mask to assert the open-drain INT output. When the MAX7322 is subsequently accessed through the serial interface, any pending interrupt is cleared. The four push-pull outputs are rated to sink 20mA, and are capable of driving LEDs. The RST input clears the serial interface, terminating any I2C communication to or from the MAX7322. The MAX7322 uses two address inputs with four-level logic to allow 16 I2C slave addresses. The slave address also sets the power-up default logic state for the four out- put ports, and enables or disables internal 40kΩ pullups for the input ports. The MAX7322 is available in 16-pin QSOP and TQFN packages, and is specified over the -40°C to +125°C automotive temperature range.

The MAX7324 is a 2-wire serial-interfaced peripheral with 16 I/O ports that are divided into eight push-pull outputs and eight inputs. Each input features selectable internal pullups, overvoltage protection to +6V, and transition detection with an interrupt output. All input ports are continuously monitored for state changes (transition detection). The interrupt is latched, allowing detection of transient changes. Any combination of inputs can be selected using the interrupt mask to assert the INT output. When the MAX7324 is subsequently accessed through the serial interface, any pending interrupt is cleared. The push-pull outputs are rated to sink 20mA and are capable of driving LEDs. The RST input clears the serial interface, terminating any I2C communication to or from the MAX7324. The MAX7324 uses two address inputs with four-level logic to allow 16 I2C slave addresses. The slave address also enables or disables internal 40kΩ pullups in groups of four ports. The MAX7324 is one device in a family of pin-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1). The MAX7324 is available in 24-pin QSOP and TQFN packages, and is specified over the -40°C to +125°C automotive temperature range. Applications include cell phones, notebooks, SAN/NAS, automotive servers, and satellite radio. Features include 400kHz, +6V-tolerant I2C serial interface, +1.71V to +5.5V operating voltage, eight push-pull outputs, and eight inputs.

The MAX7302 I2C-/SMBus™-compatible, serial-interfaced peripheral features 9 level-translating I/Os, and operates from a 1.62V to 3.6V power supply.

The MAX7323 is an 8-channel I/O expander with four push-pull outputs and the other four are open-drain I/O ports. The device supports 400kHz I2C serial interface, operating voltage range is +1.71V~+5.5V, and operating temperature range is -40℃~+125℃.

MAX7306/MAX7307 is an I2C-compatible, serial-interfaced four-level translating I/O device operating from 1.62V to 3.6V. The MAX7307 features a port supply (VLA) that allows level translation on I/O ports to operate from a separate power supply from 1.4V to 5.5V. The MAX7306 features an address select input (AD0) to allow up to four unique slave addresses. MAX7306/MAX7307 ports P2, P3 and P4 can be configured as inputs, push-pull outputs and open-drain outputs. Port P1 can be configured as a general-purpose input, open-drain output or an open-drain INT output. Ports P2 and P3 can be configured as OSCIN and OSCOUT respectively. The MAX7306/MAX7307 include an internal oscillator for PWM, blink and key debounce or to cascade multiple MAX7306/MAX7307s. The external clock can be used to set a specific PWM and blink timing. The RST input asynchronously clears the 2-wire interface and terminates a bus lockup involving the MAX7306/MAX7307. All ports configured as output feature 33-step PWM, allowing any output to be set from fully off, 1/32 to 31/32 duty cycle, to fully on. All output ports also feature LED blink control, allowing blink periods of 1/8 second, 1/4 second, 1/2 second, 1, 2, 4 or 8 seconds. Any port can blink during this period with a 1/16 to 15/16 duty cycle. MAX7306/MAX7307 are specified over the -40°C to +125°C temperature range and are available in 10-pin µDFN (2mm x 2mm) and 10-pin µMAX®.

MAX7304 is a 16-port GPIO and LED driver with I2C interface from MAXIM company, which supports 1.62V to 3.6V power supply and has high level of ESD protection.

The MAX6966/MAX6967 is a serial interface peripheral from Texas Instruments that provides 10 I/O ports that can be configured as either current drivers, logic outputs, or Schmitt logic inputs. It supports PWM dimming and per-LED switching control.

The MAX6946/MAX6947 is an I2C-/SMBusTM-compatible serial-interfaced peripheral that provides microprocessors with 10 I/O ports rated to 7V. Each port can be configured as a 2.5mA to 20mA constant-current LED driver (static or PWM), a 1.25mA to 10mA constant-current LED driver (static or PWM), an open-drain logic output, or an overvoltage-protected Schmitt logic input. Analog and switching LED intensity control includes individual 8-bit PWM control per output, individual 1-bit analog current control (half/full scale) per output, and a global 3-bit DAC current control that applies to all LED outputs. The MAX6946/MAX6947 can stagger the PWM timing of the 10-port outputs in consecutively phased 45° increments. Staggering the outputs spreads the PWM load currents over time in eight steps, helping to even out the power-supply current and reduce the RMS current. For a similar part with an SPITM-/QSPITM-/ or MICROWIRETM- compatible interface, refer to the MAX6966/MAX6967 data sheet.

This document describes a product with open drain PIO pins that can be controlled and their logic level can be determined over 1-Wire bus for closed-loop control. It replaces and is fully compatible with DS2407 but has no user-programmable power-on settings and no Hidden Mode.

This document describes the features and characteristics of the DS2408 1-Wire 8-Channel Addressable Switch, including eight channels of programmable I/O with open-drain outputs, capture of asynchronous state changes at PIO inputs, data-strobe output, etc.

The DS28E04-100 is a 4096-bit, 1-Wire® EEPROM chip with seven address inputs. The address inputs are directly mapped into the 1-Wire 64-bit Device ID Number to easily enable the host system to identify the physical location or functional association of the DS28E04-100 in a multidevice 1-Wire network environment. The 4096-bit EEPROM array is configured as 16 pages of 32 bytes with a 32 byte scratchpad to perform write operations. EEPROM memory pages can be individually write protected or put in EPROM- emulation mode, where bits can only be changed from a 1 to a 0 state. In addition to the memory, the DS28E04-100 has two general-purpose I/O ports that can be used for input or to generate level and/or pulse outputs. Activity registers also capture port activity for state change monitoring. The DS28E04- 100 communicates over the single-contact 1-Wire bus. The communication follows the standard Maxim 1-Wire protocol.

The DS2413 is a dual-channel programmable I/O 1-Wire® chip. The PIO outputs are configured as open-drain and provide up to 20mA continuous sink capability and off-state operating voltage up to 28V. Control and sensing of the PIO pins is performed with a dedicated device-level command protocol. To provide a high level of fault tolerance in the end application, the 1-Wire IO and PIO pins are all capable of withstanding continuous application of voltages up to 28V max. Communication and operation of the DS2413 is performed with the single contact Maxim/Dallas 1-Wire serial interface.