MAX7319 Datasheet | Maxim Integrated

Description The MAX7319 2-wire serial-interfaced peripheral features eight input ports with selectable internal pullups, overvoltage protection to +6V, and transition detection with interrupt output. All input ports are continuously monitored for state changes (transition detection). Transitions are latched, allowing detection of transient changes. Any bination of inputs can be selected using the interrupt mask to assert the INT output. When the MAX7319 is subsequently accessed through the serial interface, any pending interrupt is cleared. The +5.5V tolerant RST input clears the serial interface, terminating any I 2 C munication to or from the MAX7319. The MAX7319 uses two address inputs with four-level logic to allow 16 I 2 C slave addresses. The slave address also enables or disables internal 40kΩ pullups in groups of four ports. The MAX7319 supports hot insertion. All eight input ports, the serial interface SDA, SCL, AD0, AD2, INT, and RST remain high impedance in power-down (V+ = 0) with up to +6V asserted on them. The MAX7319 is one device in a family of pin-patible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports (see Table 1). The MAX7319 is available in 16-pin QSOP and 16-pin TQFN packages, and is specified over the automotive temperature range (-40°C to +125°C). o 400k Hz, +5.5V-Tolerant I2C o +1.71V to +5.5V Operating Voltage o Eight Input Ports with Maskable, Latching Transition Detection o Input Ports are Overvoltage Protected to +6V o Transient Changes are Latched, Allowing Detection Between Read Operations o INT Output Alerts Change on Any Selection of Inputs o AD0 and AD2 Inputs Select from 16 Slave Addresses o Low 0.6µA (typ) Standby Current o -40°C to +125°C Operating Temperature Range Features Serial Interface Ordering Information PART MAX7319AEE+ MAX7319ATE+ PIN-PACKAGE TOP MARK 16 QSOP 16 TQFN-EP- - ADA PKG CODE E16-4 T1633-4 Note: All devices specified over -40°C to +85°C operating range....