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MAX7325
I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os
Low Operating Supply Voltage I2C Port Expander with 8 Push-Pull and 8 Configurable Open-Drain I/Os
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Key Features
Applications/Uses
Parametric specs for I/O Port Expanders
| Interface | Serial - I2C Compatible Serial 2-Wire 400kbit |
| I/O | 16 |
| Reset Input | Yes |
| Interrupt Output | Yes |
| Over Voltage Protection (V) | 6 |
| Drive Current (mA) | 25 |
| VSUPPLY (V) (min) | 1.71 |
| VSUPPLY (V) (max) | 5.5 |
| Package/Pins | QSOP/24 TQFN/24 |
| Budgetary Price (See Notes) | 1.18 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os | Jan 12, 2016 |
Support & Training
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Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Parametric specs for I/O Port Expanders
| Interface | Serial - I2C Compatible Serial 2-Wire 400kbit |
| I/O | 16 |
| Reset Input | Yes |
| Interrupt Output | Yes |
| Over Voltage Protection (V) | 6 |
| Drive Current (mA) | 25 |
| VSUPPLY (V) (min) | 1.71 |
| VSUPPLY (V) (max) | 5.5 |
| Package/Pins | QSOP/24 TQFN/24 |
| Budgetary Price (See Notes) | 1.18 |
Key Features
- 400kHz I2C Serial Interface
- +1.71V to +5.5V Operating Voltage
- 8 Push-Pull Output Ports
- 8 Open-Drain I/O Ports, Rated at 20mA Sink Current
- I/O Ports are Overvoltage Protected to +6V
- Selectable I/O Port Power-Up Default Logic States
- Transient Changes are Latched, Allowing Detection Between Read Operations
- Active-Low INT Output Alerts Changes on Inputs
- AD0 and AD2 Inputs Select from 16 Slave Addresses
- Low 0.6µA (typ) Standby Current
- -40°C to +125°C Temperature Range
Applications/Uses
- Automotive
- Cell Phones
- Notebooks
- SAN/NAS
- Satellite Radio
- Servers
Description
The MAX7325 2-wire serial-interfaced peripheral features 16 I/O ports. 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. 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 active-low 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 active-low 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 of the full data sheet).
The MAX7325 is available in 24-pin QSOP and TQFN packages and is specified over the -40°C to +125°C automotive temperature range.
All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the active-low 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 active-low 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 of the full data sheet).
The MAX7325 is available in 24-pin QSOP and TQFN packages and is specified over the -40°C to +125°C automotive temperature range.
Technical Docs
| Data Sheet | I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os | Jan 12, 2016 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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