MAX72408

Dual SGPIO Backplane Controller

Hardware-Optimized Dual SGPIO (SFF-8485) Controller Allows Drive Enclosure Status Updates for Two Separate Domains

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Overview

Common Features
- Dedicated Slave Mode I²C Interface
- Autoload I²C Master Interface—Can Share with Up to Eight MAX72408 Devices
- I²C Slave Interface—Can Share with Up to Eight MAX72408 Devices
- Interrupt Output—Can Configure for Open Drain or Active Drive
- High-Impedance Inputs (Nonclamping)
- 5V Tolerant I/O Using 3.3V Technology
- On-Board 3.3V to 1.8V LDO Regulator for Core Logic
- Internal Power-On Reset
SGPIO Features
- Support for Up to Eight Drives Per Device—Cascaded Devices Can Support Up to 64 Drives
- Mated/Present and SATA Pin 11 Activity Input for Each Drive
- Activity and Status Light-Emitting Diode (LED) Output for Each Drive
- Implements SGPIO IBPI (SFF-8489 Rev 0.1)
- Two 24-Bit SGPIO Master/Slave Interfaces
- Operates in One of Three Modes for Dual or Single Slave Operation
GPIO Features
- Eight Optional Fan-Speed Monitor Inputs
- Eight Optional Pulse-Width-Modulation (PWM) Outputs
- Up to 40 User-Defined Pulse-Train Outputs
- Up to 40 Edge-Sensitive Inputs for Interrupt Generation
- Up to 40 General-Purpose Input/Output (GPIO) Under User Control

The MAX72408 is a dual serial general-purpose input/output (SGPIO) backplane controller. It is intended for system designers and software and firmware developers using this device to support enclosure management functions or other related I/O expansion tasks. The device can be used in any embedded control application including SAS or SATA where the monitoring of and control of a large number of digital I/O signals is required.

Applications