Chip Integrates Switch And PHY For IP Phone And Home Gateway Router Apps

Representing an enhanced version of the KS8995 telecomm chip, the KS8995E IC integrates PHY and switch to deliver virtual LAN (VLAN), packet priority queuing, EEPROM programming, and MDI/MDI-X automatic crossover functionality to IP phone and home gateway router applications. Like its predecessor, the device can be configured with five PHY ports or with four PHY ports and a level-two switch. It also features on-chip SRAM, 1.4-Gb/s memory bandwidth, and unmanaged operation for 10BaseT, 100BaseTX and 100Base FX networks. Other features include hardware-based 10/100, full or half duplex operation, flow control and auto negotiation, individual port-forced modes when auto negotiation is disabled, full-duplex IEEE 802.3x flow control, half-duplex back pressure flow control, wire speed reception and transmission, and unmanaged operation through strapping at system reset time. Available in a 128-pin PQFP, the KS8995E integrated PHY and switch costs $19.10 each/1,000.