Maxim Integrated MAX7322ATE+T, I²C port expander, 4 I/O, 400 kHz, 1.7V–5.5V, -40°C–125°C, 16-TQFN (3x3), Tape & Reel.
| Parameter | Value |
|---|---|
| Mounting type | Surface Mount |
| Voltage | 1.7V ~ 5.5V |
| Current - output source (Sink) | 20mA |
| Frequency | 400 kHz |
| Interface | I²C |
| Operating temperature | -40°C ~ 125°C |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Features | POR |
| Number of i (O) | 4 |
| Case | 16-WFQFN Exposed Pad |
| Interrupt output | Yes |
Four I/O lines fit a 16-TQFN footprint (3x3 mm). The 20 mA source/sink per pin drives a standard LED directly or switches a small-signal MOSFET gate through a series resistor.
The MAX7322ATE+T is listed as Active with ROHS3 compliance. The Tape & Reel (TR) and Cut Tape (CT) packaging options suit both volume production and prototype runs.
Yes, it is ROHS3 compliant, covering all six original RoHS substances plus the four phthalates (DEHP, BBP, DBP, DIBP).
The MAX7322 is a 4-port I²C expander with interrupt output, while the MAX7321 is an 8-port expander without interrupt. They are not pin-compatible; the MAX7322 has a different I²C address map and fewer I/O. For a direct 4-port replacement with interrupt, the MAX7322 is the correct part.
The MAX7322 uses a fixed I²C slave address determined by the AD0 and AD1 pin strapping. Refer to the datasheet for the address table; the base address is 0x60 (7-bit) with two programmable bits via the address pins, giving four possible addresses.
The MAX7322 provides 4 I/O ports with interrupt output; the MAX7323 provides 8 I/O ports also with interrupt output. Both use the same 16-TQFN package and I²C interface, but the MAX7323 requires a different I²C address and has twice the GPIO count.