MAX7315ATE+TG071

Overview

The MAX7315ATE+TG071 is an I/O expander with integrated LED intensity control, interrupt generation, and hot-insertion protection. It provides eight open-drain I/O ports (P0–P7) rated at 50mA sink current up to 5.5V external supply, plus a ninth port (INT/O8). The device operates on a 2V to 3.6V supply with a maximum serial clock frequency of 400kHz. Standby current is typically 1.2µA. It features 8-bit PWM intensity control with global and individual settings, automatic two-phase blinking, and transition detection. The component is housed in a 16-pin Thin QFN package (3mm x 3mm) and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrated 8-bit PWM LED intensity control with global master adjustment and per-output fine-tuning capabilities
• Supports hot insertion with high-impedance state maintenance on all pins during power-down conditions
• Transition detection logic monitors input ports for logic changes and triggers an interrupt output signal
• Pin and software compatible with PCA9534 and PCA9554(A) devices

Applications

• LCD backlights
• LED status indication
• Keypad backlights
• RGB LED drivers

Procurement Notes

Verify the specific suffix TG071 against manufacturer documentation to confirm reel packaging specifications and tape-and-reel dimensions. Ensure the ordering information matches the required Thin QFN package variant. Confirm RoHS compliance status through official datasheets before procurement.

Selection Notes

Select this component when an I2C-compatible GPIO expander requires direct LED driving capability without external transistors. Verify that the 50mA sink rating meets load requirements and that the 2V to 3.6V supply voltage aligns with system rails. Consider the 16-pin QFN footprint for space-constrained designs.

Part Context

The MAX7315 belongs to the Maxim Integrated MAX73xx series of I/O expanders. It serves as a peripheral interface for microprocessors, offering expanded connectivity through a standard serial bus. The device integrates additional functionality beyond basic GPIO expansion, specifically targeting applications requiring direct LED management and system monitoring via interrupts.

Replacement Considerations

The MAX7315 is pin and software compatible with the PCA9534 and PCA9554(A). Verify electrical characteristics and register mapping compatibility before substituting these alternative part numbers in existing designs.