MAX7321
PRODUCTIONI2C Port Expander with 8 Open-Drain I/Os
An 8 Push-Pull Output GPIO/LED Driver with an RST Input Software Compatible with the MAX7324, MAX7325, MAX7326 and MAX7327 (16-Port GPIOs)
- Part Models
- 4
- 1ku List Price
- Starting From $1.40
Part Details
- 400kHz I2C Serial Interface
- +1.71V to +5.5V Operating Voltage
- 8 Open-Drain I/O Ports Rated to 20mA Sink Current
- I/O Ports Are Overvoltage Protected to +6V
- Any Port Can Be a Logic Input or an Open-Drain Output
- Selectable I/O Port Power-Up Default Logic States
- Transient Changes Are Latched, Allowing Detection Between Read Operations
- active-low INT Output Alerts Change on Inputs
- AD0 and AD2 Inputs Select from 16 Slave Addresses
- Low 0.6µA (typ) Standby Current
- -40°C to +125°C Operating Temperature
The MAX7321 2-wire serial-interfaced peripheral features eight open-drain I/O ports with selectable internal pullups and transition detection. Any port may be used as a logic input or an open-drain output. Ports are overvoltage protected to +6V independent of supply voltage.
All 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 MAX7321 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 +6V tolerant active-low RST input clears the serial interface, terminating any I2C communication to or from the MAX7321.
The MAX7321 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 MAX7321 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 MAX7321 is available in 16-pin QSOP and 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
Reliability Data 1
Design Note 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 |
|---|---|---|---|
| MAX7321AEE+ | 16-QSOP-150_MIL | ||
| MAX7321AEE+T | 16-QSOP-150_MIL | ||
| MAX7321ATE+ | Thin Quad Flatpack, No Leads | ||
| MAX7321ATE+T | Thin Quad Flatpack, No Leads |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 9, 2015 - 1481 WAFER FAB |
||
| MAX7321AEE+ | PRODUCTION | |
| MAX7321AEE+T | PRODUCTION | |
| MAX7321ATE+ | PRODUCTION | |
| MAX7321ATE+T | PRODUCTION | |
|
Apr 9, 2018 - 1682 ASSEMBLY |
||
| MAX7321ATE+ | PRODUCTION | |
| MAX7321ATE+T | PRODUCTION | |
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX7321ATE+ | PRODUCTION | |
| MAX7321ATE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
Tools & Simulations
Software Development 1
IBIS Model 1
Evaluation Kits
Evaluation Kit for the MAX7321
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