MAX7323AEE+T

Overview

The MAX7323AEE+T is an I2C port expander featuring four push-pull outputs and four open-drain I/O ports. It operates on a supply voltage of +1.71V to +5.5V with a typical standby current of 0.6µA. The device supports up to 400kHz serial communication and includes latching transition detection for input monitoring. It provides overvoltage protection up to +6V on the open-drain ports and offers 16 selectable slave addresses via AD0 and AD2 inputs. The component is specified for operation from -40°C to +125°C and is housed in a 16-pin QSOP package.

Feature Summary

• Four push-pull output ports rated at 20mA sink current
• Four open-drain I/O ports rated at 20mA sink current with +6V overvoltage protection
• Latching transition detection interrupt functionality
• Low standby current consumption

Applications

• Cell Phones
• Servers
• SAN/NAS Systems

Procurement Notes

Verify that the ordering suffix EE+T corresponds specifically to the 16-pin QSOP package and tape-and-reel delivery format. Confirm the lead-free status (+) matches project requirements. Ensure the automotive temperature range (-40°C to +125°C) aligns with the target environment specifications before finalizing procurement.

Selection Notes

Select this part when four push-pull outputs and four open-drain I/O ports are required within a single 16-pin package. It is suitable for applications needing latching transition detection and low standby power. Verify that the 16 available I2C slave addresses fit the system bus topology. Consider the +6V tolerance if interfacing with higher voltage logic levels.

Part Context

The MAX7323 belongs to the MAX7319–MAX7329 family of pin-compatible port expanders. It serves as a general-purpose peripheral for expanding I/O capabilities in embedded systems. The device integrates internal pullup resistors and power-on reset circuitry, simplifying interface design compared to discrete solutions.

Replacement Considerations

The MAX7327 is a software equivalent offering 12 push-pull outputs and 4 open-drain I/Os in a 16-pin TQFN package. Direct pin-to-pin replacement requires verifying package compatibility (QSOP vs. TQFN). Other family members like the MAX7322 offer different port configurations but maintain pin compatibility.