KS8721BL/SL 3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver Rev. 1.3 General Description Features Operating with a 2.5V core to meet low-voltage and low- Single chip 100BASE-TX/100BASE-FX/10BASE-T power requirements, the KS8721BL and KS8721SL are physical layer solution 10BASE-T/100BASE-TX/FX Physical Layer Transceivers 2.5V CMOS design 2.5/3.3V tolerance on I/O that use MII and RMII interfaces to transmit and receive 3.3V single power supply with built-in voltage data. They contain 10BASE-T Physical Medium regulator Power consumption <340mW (including Attachment (PMA), Physical Medium Dependent (PMD), output driver current) and Physical Coding Sub-layer (PCS) functions. The Fully compliant to IEEE 802.3u standard KS8721BL/SL also have on-chip 10BASE-T output ltering. This eliminates the need for external lters and Supports MII and Reduced MII (RMII) allows a single set of line magnetics to be used to meet Supports 10BASE-T, 100BASE-TX, and 100BASE-FX requirements for both 100BASE-TX and 10BASE-T. with Far End Fault Detection The KS8721BL/SL automatically configure themselves Supports power-down and power-saving modes for 100 or 10Mbps and full- or half-duplex operation, Congurable through MII serial management ports or using an on-chip auto-negotiation algorithm. They are the via external control pins ideal physical layer transceiver for 100BASE-TX/ 10BASE-T applications. Functional Diagram Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. KS8721BL/SL Features (continued) Supports auto-negotiation and manual selection for KS8721BL is a drop-in replacement for the KS8721BT 10/100Mbps speed and full-/half-duplex modes in the same footprint On-chip, built-in, analog front-end ltering for both KS8721SL is a drop-in replacement for the KS8721B 100BASE-TX and 10BASE-T in the same footprint o o LED outputs for link, activity, full-/half-duplex, collision, Commercial Temperature Range: 0 C to +70 C o o and speed Industrial Temperature Range: 40 C to +85 C Supports back-to-back, FX to TX for media converter Available in 48-pin SSOP and LQFP applications Supports MDI/MDI-X auto-crossover Ordering Information Part Number Temp. Range Package Lead Finish o o KS8721BL 0 C to 70C 48-Pin LQFP Standard o o KS8721SL 0 C to 70C 48-Pin SSOP Standard o o KS8721BLI 40 C to +85C 48-Pin LQFP Standard o o KSZ8721BL 0 C to 70C 48-Pin LQFP Lead-Free o o KSZ8721SL 0 C to 70C 48-Pin SSOP Lead-Free o o KSZ8721BLI 40 C to +85C 48-Pin LQFP Lead-Free o o KSZ8721SLI 40 C to +85C 48-Pin SSOP Lead-Free June 2009 2 M9999-062509-1.3