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1. Description
The Microchip USB2514B-AEZC-TR hub is a family of lowpower, configurable, MTT (multi transaction translator) hub controller IC products for embedded USB solutions. The x in the part number indicates the number of downstream ports available, while the B indicates battery charging support. The Microchip hub supports lowspeed, full-speed, and hi-speed (if operating as a hispeed hub) downstream devices on all of the enabled downstream ports
2. Features
1. USB2514B-AEZC-TR products are fully footprint compatible with USB251x/xi/xA/xAi products as direct drop-in replacements
— Cost savings include using the same PCB components and application of USB-IF Compliance by Similarity
2. Full power management with individual or ganged power control of each downstream port
3. Fully integrated USB termination and pull-up/pulldown resistors
4. Supports a single external 3.3 V supply source; internal regulators provide 1.2 V internal core voltage
5. Onboard 24 MHz crystal driver or external 24 MHz clock input
6. Customizable vendor ID, product ID, and device ID
7. 4 kilovolts of HBM JESD22-A114F ESD protection (powered and unpowered)
8. Supports self- or bus-powered operation
9. Supports the USB Battery Charging specification Rev. 1.1 for Charging Downstream Ports (CDP)
10. The USB251xB/xBi offers the following packages:
- 36-pin SQFN (6x6 mm) (Preferred)
- 36-pin QFN (6x6 mm) (Legacy)
11. USB251xBi products support the industrial temperature range of -40ºC to +85ºC
12. USB251xB products support the extended commercial temperature range of 0ºC to +85ºC
3. Applications
1. LCD monitors and TVs
2. Multi-function USB peripherals
3. PC motherboards
4. Set-top boxes, DVD players, DVR/PVR
5. Printers and scanners
6. PC media drive bay
7. Portable hub boxes
8. Mobile PC docking
9. Embedded systems
4. Highlights
1. High performance, low-power, small footprint hub controller IC with 2, 3, or 4 downstream ports
2. Fully compliant with the USB 2.0 Specification
3. Enhanced OEM configuration options available through either a single serial I2C EEPROM, or SMBus slave port
4. MultiTRAKTM
- High-performance multiple transaction translator which provides one transaction translator per port
5. PortMap
- Flexible port mapping and disable sequencing
6. PortSwap
- Programmable USB differential-pair pin locations ease PCB design by aligning USB signal lines directly to connectors
7. PHYBoost
- Programmable USB signal drive strength for recovering signal integrity using 4-level driving strength resolution
5. Pin configuration
