Infineon Technologies SL811HST-AXC
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | Not Applicable |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 48-LQFP |
| Interface | USB |
| Mfr | Infineon Technologies |
| Mounting Type | Surface Mount |
| Operating Temperature | 0°C ~ 65°C |
| Applications | USB Host/Slave Controller |
| Supplier Device Package | 48-TQFP (7x7) |
| Core Processor | - |
| RAM Size | 256 x 8 |
| Number of I/O | 8 |
| Voltage - Supply | 3V ~ 3.6V |
| Program Memory Type | - |
| Controller Series | USB-Hosts |
| Package | Tray |
| Product Status | Obsolete |
| Conevo-Key Programmable | Not Verified |
| Base Product Number | SL811 |
| REACH Status | REACH Unaffected |
| Standard Package | 1,250 |
| ECCN | 3A991A3 |
| HTSUS | 8542.39.0001 |
SL811HST-AXC USB Host Controller
The SL811HST-AXC is a high-performance USB 1.1 host controller IC designed by Cypress Semiconductor (now part of Infineon Technologies) for embedded systems requiring USB host functionality. Packaged in a compact 48-pin LQFP, this device supports both full-speed (12 Mbps) and low-speed (1.5 Mbps) USB communication, making it ideal for industrial automation, consumer electronics, and automotive infotainment applications. It integrates a USB transceiver, serial interface engine (SIE), and enhanced root hub with two downstream ports, eliminating the need for external components. The SL811HST-AXC features a flexible 8-bit or 16-bit parallel host interface compatible with microcontrollers (MCUs) and digital signal processors (DSPs), enabling seamless integration into legacy systems. Its advanced power management includes USB suspend/resume modes and individual port power control, reducing system power consumption. The chip also supports USB class drivers for HID, mass storage, and CDC devices, simplifying firmware development.
Functional Highlights
The SL811HST-AXC’s integrated SIE handles protocol-level tasks such as packet framing, error detection, and CRC generation, freeing the host processor from low-level USB operations. Its dual-port root hub supports per-port overcurrent detection and automatic disconnection during fault conditions, enhancing system reliability. The device’s parallel interface allows direct connection to MCUs without additional glue logic, reducing board space and cost. For firmware flexibility, the chip provides a register-based control interface with interrupt-driven event notification, enabling real-time USB event handling. Advanced features like remote wakeup signaling and dynamic port reconfiguration make it suitable for battery-powered devices requiring low standby power. The SL811HST-AXC also includes a built-in watchdog timer to prevent system lockups during USB transactions.
Alternative USB host IC Models
● ISP1161A1 (NXP Semiconductors): A USB 1.1 host controller with dual downstream ports and integrated PHY, offering similar performance but with additional support for OHCI-compliant drivers.
● SL811HS-T (Cypress Semiconductor): A pin-compatible variant with identical functionality but available in a smaller 32-pin TQFP package for space-constrained designs.
● MAX3420E (Maxim Integrated): A USB 1.1 host controller with SPI interface, targeting low-pin-count MCUs and providing built-in EEPROM for device configuration.
● USB2514B (Microchip Technology): A USB 2.0 hub controller with four downstream ports, supporting high-speed (480 Mbps) operation for modern peripherals while maintaining backward compatibility with USB 1.1.
