MAX7313ATG+T

MAX7313ATG+T is Maxim’s 16-channel constant-current LED sink driver with I2C control. It provides 16 programmable current sinks that drive LEDs (or LED pixels in matrices/backlights) from an external LED supply, while the control side is powered by a low-voltage I2C bus. Each channel current can be set via I2C (ISET) for per-LED brightness; global dimming and a shutdown mode are available. It also includes basic fault-detection features (e.g., open/short LED monitoring) and supports multiple devices on the same I2C bus. The ATG+T suffix denotes a lead-free, RoHS-compliant variant in a TQFP-style package. Typical uses include LED backlighting for displays, signages, display matrices, and keyboard/backlight applications. In short, MAX7313ATG+T offers scalable, software-controlled LED brightness by channel with simple I2C management and fault diagnostics, in a compact lead-free package.

Equivalent devices (16-bit I2C I/O expanders): Microchip MCP23017; NXP PCA9535; NXP PCF8575; TI TCA9535; Onsemi CAT9555. All offer 16 GPIOs via I2C with similar register maps; verify voltage, pinout and package for compatibility.

Concise features of MAX7313ATG+T:
- 8-channel constant-current LED sink driver
- I2C (2-wire) serial interface with programmable addresses
- Programmable current per channel
- Global dimming and per-channel brightness control
- Open/short LED protection with status/fault reporting
- Low quiescent current; fast response
- Wide supply range (roughly 2.7V–5.5V), MCU-friendly
- Registers-based configuration (auto-increment addressing)
- RoHS-compliant packaging; ATG+T denotes tape-and-reel, lead-free variant
Note: See the datasheet for exact current ranges, register map, and timing details.

- Pin count: 28 pins (28-pin package; ATG variant with +T tape-and-reel)
- Function: I2C-bus controlled 8-bit GPIO expander (general-purpose I/O with interrupt capability) used to extend microcontroller I/O.

- Manufacturer: Maxim Integrated (the MAX7313ATG+T is a Maxim part; Maxim is now a brand of Analog Devices after acquisition).
- What kind of company: A semiconductor company that designs, develops, and manufactures analog and mixed-signal integrated circuits, based in the United States (originally Sunnyvale/ Silicon Valley).

Applications of MAX7313ATG+T (I2C LED display driver):
- Drives LED displays: 7-segment, alphanumeric, and dot-matrix displays
- Industrial instrumentation: digital meters, counters, panel meters
- Automotive: instrument clusters, indicators, dashboards
- Consumer appliances: display panels for ovens, microwaves, washing machines, etc.
- Medical and laboratory equipment displays
- Point-of-sale and electronic signage displays
- General-purpose digital readouts in HVAC, power supplies, test gear, and control panels
Note: Uses an I2C-compatible serial interface to drive multiple LED channels.

The MAX7313ATG+T is supplied in a 16-pin TSSOP (thin shrink small-outline package). The "G" indicates lead‑free finishing and the "+T" denotes tape‑and‑reel packaging.