The MAX7323 2-wire serial-interfaced peripheral features eight I/O ports. Four ports are push-pull outputs and the other four are open-drain I/O ports that are overvoltage protected up to +6V independent of the supply voltage.
The four I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the open-drain
active-low INT output. The interrupt is latched, allowing detection of transient changes. When the MAX7323 is subsequently accessed through the serial interface, any pending interrupt is cleared.
The four push-pull and four open-drain outputs are rated to sink 20mA and are capable of driving LEDs.
The active-low RST input clears the serial interface, terminating any I²C communication to or from the MAX7323.
The MAX7323 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 for the input ports in groups of two ports.
The MAX7323 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 in the full data sheet).
The MAX7323 is available in 16-pin QSOP and 16-pin TQFN packages, and is specified over the automotive temperature range (-40°C to +125°C).
Key Features
Applications/Uses
400kHz I²C Serial Interface
+1.71V to +5.5V Operating Voltage
4 Push-Pull Output Ports Rated at 20mA Sink Current
4 Open-Drain I/O Ports Rated to 20mA Sink Current
4 I/O Ports Are Overvoltage Protected to +6V
Transient Changes Are Latched, Allowing Detection Between Read Operations
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
Download
E-Mail
