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Analog Devices MAX7321AEE+T — Signal Isolation
Analog Devices

MAX7321AEE+T I2C Port Expander, 8 I/O, 400 kHz, 16-QSOP

MPNMAX7321AEE+T
End of Life

Analog Devices MAX7321AEE+T I2C port expander, 8 I/O, 400 kHz, open-drain/push-pull outputs, 1.71V-5.5V supply, -40°C to 125°C, 16-QSOP, ROHS3.

$4.82Ref. price · indicative, final on quote
MAX7321AEE+T datasheet
Packaging16-SSOP (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

MAX7321AEE+T Technical Specifications
ParameterValue
Output typeOpen Drain, Push-Pull
Mounting typeSurface Mount
Voltage1.71V ~ 5.5V
Current - output source (Sink)20mA
Frequency400 kHz
InterfaceI²C
Operating temperature-40°C ~ 125°C
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesPOR
Number of i (O)8
Case16-SSOP (0.154\", 3.90mm Width)
Interrupt outputYes

Product details

I2C port expander for GPIO-limited designs

The Analog Devices MAX7321AEE+T is an 8-bit I2C port expander that adds eight general-purpose I/O lines to a host controller over a two-wire serial bus. It communicates at up to 400 kHz on the I2C interface.

Lifecycle and sourcing

The MAX7321AEE+T is listed as Active in production with ROHS3 compliance. It remains a current-design-in part, so there is no last-time-buy risk for new builds. The part is available through independent distribution; sourcing is confirmed and quoted to order against an RFQ, with current pricing and availability verified at quote time.

Frequently asked questions

What is the I2C address of MAX7321AEE+T?

The I2C address is determined by the AD0 and AD1 address input pins. The base address is 0b1000XXX, where XXX is set by the logic levels on AD0 and AD1. This gives four possible addresses: 0x40, 0x42, 0x44, and 0x46 (7-bit format). The address is configured externally, not fixed internally.

Does MAX7321AEE+T have an interrupt output?

Yes, the MAX7321AEE+T provides an interrupt output (IRQ) that asserts low when any input port changes state. This allows the host controller to react to input transitions without polling the I2C bus, reducing software overhead.

Is MAX7321AEE+T equivalent to PCA9535?

No, the MAX7321AEE+T is not directly equivalent to the PCA9535. The PCA9535 is a 16-bit I2C port expander with a different register map and addressing scheme. The MAX7321AEE+T is an 8-bit device with a distinct command byte structure. They are not pin-compatible and require software changes. For a close alternative, consider the MAX7320 (without interrupt) or the MAX7322 (with interrupt and different address options) within the same family.