(China (Mainland))
Product Summary
The RTL8309SC is a 128-pin, ultra low power, high-performance 8-port Fast Ethernet single-chip switch with one extra MII port for specific applications. It integrates all the functions of a high speed switch system—including SRAM for packet buffering, non-blocking switch fabric, address management, one general use MII interface, eight 10/100 Base-TX transceivers, and nine Media Access Controllers—into a single 0.18μm CMOS device. The RTL8309SC provides compatibility with all industry standard Ethernet and Fast Ethernet devices. Only a 25MHz crystal is required; the EEPROM is optional to save BOM costs.
Parametrics
RTL8309SC absolute maximum ratings: (1)Storage Temperature: min=-55℃, max=+150℃; (2)Supply Voltage Referenced to GND: VDDD, VDDA,and 1.8V VDDIO: min=GND-0.5 V, max=+2.16 V; (3)Supply Voltage Referenced to GND: 2.5V VDDIO: min=GND-0.5 V, max=+3.00 V; (4)Supply Voltage Referenced to GND: 3.3V VDDIO: min=GND-0.5V, max=+3.96 V; (5)Digital Input Voltage: min=GND-0.5V, max=VDDD V; (6)DC Output Voltage: min=GND-0.5V, max=VDDD V.
Features
RTL8309SC features: (1)Integrates eight 10/100 transceivers and nine MAC units for 10Base-T and 100Base-TX; (2)Embedded SRAM for packet storage; (3)On-chip 1024-entry look-up table in direct mapping mode; (4)Embedded 16-entry CAM for hash collision mapping; (5)Provides read/write access to look-up table entries via SMI interface; (6)Provides non-blocking wire speed reception and transmission; (7)Support for 4 LEDs per-port in various combinations for comprehensive applications; (8)Optional loop detection function with an LED to indicate the existence of a loop.
Diagrams
<P><IMG border=0 alt="RTL8309SC block diagram" src="http://www.seekic.com/uploadfile/ic-mfg/201262961138311.jpg"></P>
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