MAX7319
PRODUCTIONI²C Port Expander with Eight Inputs and Maskable Transition Detection
Best-Suited Port Expander to Monitor Transient Changes at the Inputs for Data-Sensitive Applications with Wide Operating Voltage and Temperature Ranges
- Part Models
- 4
- 1ku List Price
- Starting From $2.14
Part Details
- 400kHz, +5.5V-Tolerant I²C Serial Interface
- +1.71V to +5.5V Operating Voltage
- Eight Input Ports with Maskable, Latching Transition Detection
- Input Ports are Overvoltage Protected to +6V
- Transient Changes are Latched, Allowing Detection Between Read Operations
- Active-Low INT Output Alerts Change on Any Selection of Inputs
- AD0 and AD2 Inputs Select from 16 Slave Addresses
- Low 0.6µA (typ) Standby Current
- -40°C to +125°C
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 combination of inputs can be selected using the interrupt mask to assert the active-low INT output. When the MAX7319 is subsequently accessed through the serial interface, any pending interrupt is cleared.
The +5.5V tolerant active-low RST input clears the serial interface, terminating any I²C communication to or from the MAX7319.
The MAX7319 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 MAX7319 supports hot insertion. All eight input ports, the serial interface SDA, SCL, AD0, AD2, active-low INT, and active-low 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-compatible port expanders with a choice of input ports, open-drain I/O ports, and push-pull output ports.
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).
Applications
- Cell Phones
- Notebooks
- SAN/NAS
- Satellite Radio
- Servers
Documentation
Data Sheet 1
Application Note 1
Design Note 1
Technical Articles 1
Device Drivers 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX7319AEE+ | 16-QSOP-150_MIL | ||
| MAX7319AEE+T | 16-QSOP-150_MIL | ||
| MAX7319ATE+ | Thin Quad Flatpack, No Leads | ||
| MAX7319ATE+T | Thin Quad Flatpack, No Leads |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
Hardware Ecosystem
Tools & Simulations
Software Development 1
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