KS8721B

Series: -
Mounting Type: Surface Mount
Type: Transceiver
Number of Drivers/Receivers: 1/1
Packaging: Tube
Protocol: MII, RMII
Voltage - Supply: 2.375 V ~ 2.625 V
Manufacturer: Micrel Inc
Package / Case: 48-BSSOP (0.295", 7.50mm Width)
Supplier Device Package: 48-SSOP


Features:

• Single chip 100BaseTX/100BaseFX/10BaseT physical layer solution
• 2.5V CMOS design, power consumption <200mW (excluding output driver current )
• Fully compliant to IEEE 802.3u standard
• Supports Media Independent Interface (MII) and Reduced MII (RMII)
• Supports 10BaseT, 100BaseTX and 100BaseFX with Far_End_Fault Detection
• Supports power down mode and power saving mode
• Configurable through MII serial management ports or via external control pins
• Supports auto-negotiation and manual selection for 10/100Mbps speed and full/half-duplex mode
• On-chip built-in analog front end filtering for both 100BaseTX and 10BaseT 
• LED outputs for link, activity, full/half duplex, collision and speed
• Supports back to back, FX to TX for media converter applications
• Supports MDI/MDI-X auto crossover
• 2.5V/3.3V tolerance on I/O
• Commercial temperature range: 0°C to +70°C
• Industrial temperature range: 40°C to +85°C
• Available in 48-pin SSOP and TQFP


Pinout




Specifications

Supply Voltage
   (V_DDC, V_DD__PLL, V_{DD_TX}, V_{DD_RCV},
    V_{DD_RX}) ................................................... 0.5V to +3.0V
   (V_DDIO) .................................................... 0.5V to +4.0V
Input Voltage .............................................. 0.5V to +4.0V
Output Voltage ............................................ 0.5V to +4.0V
Lead Temperature (soldering, 10 sec.) ..................... 270°C
Storage Temperature (T_S) ..................... 55°C to +150°C

Exceeding the absolute maximum rating may damage the device.


Description

Operating at 2.5 volts to meet low voltage and low power requirements, the KS8721B/BT is a 10BaseT/100BaseTX/ FX Physical Layer Transceiver, which provides an MII to transmit and receive data. It contains the 10BaseT Physical Medium Attachment (PMA), Physical Medium Dependent (PMD), and Physical Coding Sub-layer (PCS) functions.Moreover, the KS8721B/BT has on-chip 10BaseT output filtering, which eliminates the need for external filters and allows a single set of line magnetics to be used to meet requirements for both 100BaseTX and 10BaseT.

The KS8721B/BT can automatically configure itself for 100 or 10 Mbps and full or half duplex operation, using on-chip Auto-Negotiation algorithm. It is an ideal choice of physical layer transceiver for 100BaseTX/10BaseT applications.

Data sheets and support documentation can be found on Micrel's web site at www.micrel.com.