MAX7312ATG+T Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
MAX7312ATG+T is a Maxim/Analog Devices 16-bit I/O port expander using a 2-wire I2C interface with interrupt output and hot-insertion protection. It provides 2 ports of 8 I/O lines each, configurable as inputs or outputs. Packaged in a 24-pin LFCSP (4×4×0.75 mm) for compact expansion of microcontroller GPIO.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 24
- Lifecycle
- ACTIVE
- Datasheet
- MAX7312ATG+T Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $4.2614(MOQ 500)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 16-bit I2C I/O expansion across 2 independent 8-bit ports for flexible GPIO augmentation
- Interrupt output pin notifies host MCU on input state change, reducing polling overhead
- Hot-insertion protection allows safe board insertion without resetting or damaging connected I/O devices
- 2-wire I2C interface up to 400 kHz for easy connection to standard MCU buses
- Individual pin direction control per the 16 I/O lines enabling mixed input/output configurations
- 24-pin LFCSP 4×4×0.75 mm package for compact PCB footprint
Applications
MAX7312ATG+T is used in industrial control panels, server management boards, and display systems where microcontrollers lack sufficient GPIO. Its hot-insertion protection makes it particularly suitable for hot-swappable backplane I/O modules and field-replaceable PCB assemblies where power may be present during board insertion.
Specifications
| Manufacturer Package Code | 24-LFCSP-4X4X0.75 |
| Reach Compliance Code | Compliant |
| Date Of Intro | 2003-11-14 |
| YTEOL | 10 |
| JESD-30 Code | S-PQCC-N24 |
| JESD-609 Code | e3 |
| Number of I/O Lines | 16 |
| Number of Ports | 2 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC24,.16SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max | 0.01mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 2V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| uPs/uCs/Peripheral ICs Type | PARALLEL IO PORT, GENERAL PURPOSE |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Japan, Mainland China, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand, USA |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many I2C address configurations does MAX7312ATG+T support on a single bus?
MAX7312ATG+T supports multiple address combinations through its address pins, allowing several devices to coexist on a single 400 kHz I2C bus, enabling expansion to 64 or more I/O lines by stacking multiple expanders.
What makes the hot-insertion protection on MAX7312ATG+T important for backplane designs?
The hot-insertion protection clamps transient currents during live board insertion events, preventing latch-up or damage to the 16 I/O lines and the host I2C bus when the device is plugged into a powered backplane with active 5 V or 3.3 V I/O levels.
How does the INT output pin on MAX7312ATG+T improve MCU efficiency in input-monitoring applications?
The open-drain INT pin asserts low whenever any of the 16 input lines changes state, allowing the MCU to sleep and respond only on interrupts rather than polling all 16 inputs over I2C, reducing CPU wake cycles and bus traffic.
Can MAX7312ATG+T mix input and output lines on the same port in a real design?
Yes. Each of the 16 I/O lines has an independent direction register bit, so designers can configure any combination of inputs and outputs across the two 8-bit ports, for example using 10 pins as outputs and 6 pins as inputs in the same device.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
More from Analog Devices
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $4.4869 | $2243.46 |
| 1000+ | $4.3772 | $4377.20 |
| 2500+ | $4.2614 | $10653.50 |
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