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Analog Devices MAX7318ATG+ — DC-DC Power Modules

MAX7318ATG+ I²C/SMBus GPIO Expander, 16 I/O, 400 kHz

MPNMAX7318ATG+
End of Life

Analog Devices MAX7318ATG+, 16-bit I²C/SMBus GPIO expander, 400 kHz clock, 2V to 5.5V supply, push-pull outputs, interrupt output, POR, -40°C to 125°C, 24-TQFN (4x4 mm), ROHS3.

$6.15Ref. price · indicative, final on quote
Packaging24-WFQFN Exposed Pad
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX7318ATG+ specifications
ParameterValue
Output typePush-Pull
MountingSurface Mount
Voltage2V ~ 5.5V
Current - output source (Sink)31mA, 43mA
Frequency400 kHz
InterfaceI²C, SMBus
Operating temperature-40°C ~ 125°C
PackageTube
FeaturesPOR
Number of i (O)16
Case24-WFQFN Exposed Pad
Interrupt outputYes

Product details

16-bit I²C/SMBus GPIO expander for board-level I/O scaling

The MAX7318ATG+ from Analog Devices (formerly Maxim Integrated) is a 16-bit GPIO expander that communicates over an I²C-compatible (SMBus) two-wire interface at up to 400 kHz. It provides 16 push-pull I/O lines, each capable of sourcing 31 mA and sinking 43 mA, enough to drive LEDs, small relays, or signal-level loads directly without external buffer stages. On-chip POR (power-on reset) ensures the outputs assume a known state at power-up, and the interrupt output (INT) signals the host MCU on any input change, eliminating constant polling and reducing bus traffic.

The push-pull output structure eliminates the need for external pull-up resistors on output pins, simplifying board layout and reducing BOM count.

This temperature grade covers engine-bay electronics, outdoor base stations, and factory-floor sensor hubs. The 24-TQFN (4x4 mm) package with exposed pad aids thermal dissipation in high-temperature enclosures.

ROHS3 compliant.

Frequently asked questions

Is MAX7318ATG+ compatible with 5V logic?

Yes. The MAX7318ATG+ operates from a 2V to 5.5V supply, so running it at 5V makes its I/O and I²C/SMBus interface fully 5V-logic compatible. At 3.3V supply, it works directly with 3.3V microcontrollers.

What is the closest pin-compatible alternative to MAX7318ATG+?

Within the same family, the MAX7318ATG+ is a 16-bit I²C/SMBus GPIO expander. A direct functional equivalent would be the MAX7317 (SPI version) or the MAX7318 in a different package variant, but for pin-compatible I²C 16-bit port expanders, the PCA9535 from NXP or TCA9535 from TI offer similar register maps and pinouts — verify the address and interrupt behavior against your firmware before substituting.

What is the lead time for MAX7318ATG+?

Lead time is confirmed at RFQ time based on current factory and distributor stock positions. Submit an RFQ for the specific quantity and delivery window you need.

Can MAX7318ATG+ be used with 3.3V microcontrollers?

Yes. The 2V to 5.5V supply range includes 3.3V. At 3.3V supply, the I²C bus and I/O levels are directly compatible with 3.3V MCU logic.