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Table of Contents ( Quick Access )
Features
- High performance, low-power, small footprint hub controller IC with 2, 3, 4, or 7 downstream ports (indicated by the “x” in the part number)
- Fully compliant with the USB 2.0 specification
- Enhanced OEM configuration options available through either a single serial I2C® EEPROM, or SMBus slave port
- MultiTRAK – High-performance multiple transaction translator which provides one transaction translator per port
- PortMap – Flexible port mapping and disable sequencing
- PortSwap – Programmable USB differential-pair pin locations ease PCB design by aligning USB signal lines directly to connectors
- PHYBoost – Programmable USB signal drive strength for recovering signal integrity using 4-level driving strength resolution
- Full power management with individual or ganged power control of each downstream port
- Fully integrated USB termination and pull-up/pulldown resistors
- Supports a single external 3.3 V supply source; internal regulators provide 1.8 V internal core voltage
- Onboard 24 MHz crystal driver, ceramic resonator, or external 24/48 MHz clock input
- Customizable vendor ID, product ID, and device ID
- 4 kilovolts of HBM JESD22-A114F ESD protection (powered and unpowered)
- Supports self- or bus-powered operation
- 36-pin QFN (6×6 mm)
- 48-pin QFN (7×7 mm)
- 64-pin QFN (9×9 mm)
- USB251xi products support the industrial temperature range of -40°C to +85°C
- Mobile PC Docking Stations
- LCD Monitors/TVs
- PC Motherboards
- Gaming Consoles
- Multi-Function Printers
- Cable/DSL Modems
- Set-Top Boxes
- DVD/CD-ROM/DVR
- HDD Enclosures
- Keyboards
- KVM Switches
- Server Front Panels
- Point-of-Sale (POS) Systems
- IP Telephony
- Automobile/Home Audio Systems
- Industrial
Parametrics
| Downstream Ports | 7 |
| Integrated Flash Media Reader | No |
| MGMT I/F | I2C |
| MultiTRAK Tech | Yes |
| Op Voltage (V) | 3.3 |
| Per-Port Switching | No |
| PHYBoost | Yes |
| PortMap | Yes |
| PortSwap | Yes |
| ROM I/F | No |
| SmartHub | No |
| Temp Range (°C) | -40 – 85 |
| TrueSpeed | Yes |
| Upstream Port | USB 2.0 |
| USB Speed | USB 2.0 |
Contact us for more information
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