USB2512B-I/M2

Controllers Overview

The USB2512B-I/M2 is a low-power, configurable USB 2.0 Hi-Speed hub controller IC manufactured by Microchip Technology. It features two downstream ports and supports MultiTRAK technology for dedicated transaction translation per port. The device operates on a single 3.3 V supply with an internal 1.2 V regulator and supports both self-powered and bus-powered modes. It includes integrated USB termination resistors and offers customizable VID/PID via I2C or SMBus. The component is housed in a 36-pin SQFN (6x6 mm) package and functions within an operating temperature range of -40°C to +85°C.

Controllers Feature Summary

• MultiTRAK technology provides a dedicated transaction translator for each downstream port to maintain consistent full-speed data throughput.
• PortMap feature allows flexible port mapping and disable sequencing to support various platform designs.
• PHYBoost enables programmable USB signal drive strength to recover signal integrity using four-level resolution.
• Supports Battery Charging Specification Rev 1.1 for charging downstream ports.

Controllers Applications

• LCD monitors and TVs
• Multi-function USB peripherals
• PC motherboards
• Set-top boxes, DVD players, DVR/PVR
• Embedded systems

Controllers Procurement Notes

Verify the specific suffix '-I' confirms the industrial temperature range (-40°C to +85°C). Confirm the 'M2' suffix corresponds to the 36-SQFN (6x6 mm) package. Ensure compatibility with existing PCB layouts if replacing legacy USB251x variants, as the B series is footprint compatible. Check for required external components such as the 24 MHz crystal or clock source depending on configuration.

Controllers Selection Notes

Select this model for applications requiring a compact, low-power USB 2.0 Hi-Speed hub with two downstream ports. The industrial temperature rating makes it suitable for harsh environments compared to commercial variants. Consider the need for battery charging support if powering devices without host enumeration. Verify that the system design accommodates the 36-pin SQFN package dimensions and thermal requirements.

Controllers Part Context

This part belongs to the USB251xB/xBi family of hub controllers. The 'B' indicates battery charging support, while 'i' denotes the industrial temperature range. It serves as a direct drop-in replacement for USB251x/xi/xA/xAi products, maintaining pin compatibility and allowing the use of identical PCB components. This facilitates cost savings and simplifies upgrades for OEMs seeking enhanced features like PHYBoost and PortSwap.

Controllers Replacement Considerations

USB2512B is a direct drop-in replacement for USB2512, USB2512A, USB2512i, and USB2512Ai. These variants share the same footprint and pinout. However, verify that default Product IDs and register configurations are acceptable or can be reprogrammed via I2C/SMBus, as defaults may differ between generations.

Controllers FAQ

How does the USB2512B-I/M2 handle full-speed data throughput?

It utilizes MultiTRAK technology, which implements a dedicated Transaction Translator (TT) for each downstream port. This ensures consistent full-speed data throughput regardless of the number of active downstream connections.

Can the USB2512B-I/M2 operate without an external crystal?

Yes, the device supports an onboard 24 MHz crystal driver. Alternatively, an external 24 MHz clock input can be applied to the XTALIN/CLKIN pin.

What is the function of the PortSwap feature?

PortSwap allows programmable USB differential-pair pin locations. This eases PCB design by enabling designers to align USB signal lines directly to connectors, avoiding uneven trace lengths or crossing of differential signals.