KSZ8721B Micrel Inc, KSZ8721B Datasheet - Page 3

• Manufacturer Part Number: KSZ8721B
• Description: IC TXRX PHY 10/100 2.5V 48-SSOP
• Manufacturer: Micrel Inc
• Type: Transceiverr

Specifications of KSZ8721B

• Number Of Drivers/receivers: 1/1
• Protocol: MII, RMII
• Voltage - Supply: 2.375 V ~ 2.625 V
• Mounting Type: Surface Mount
• Package / Case: 48-SSOP
• Data Rate: 100Mbps
• Supply Voltage Range: 2.375V To 2.625V
• Logic Case Style: SSOP
• No. Of Pins: 48
• Operating Temperature Range: 0°C To +70°C
• Msl: MSL 2 - 1 Year
• Ic Function: Transceiver IC
• Termination Type: SMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 576-1627 - BOARD EVALUATION FOR KSZ8721BMC576-1626 - BOARD EVALUATION FOR KSZ8721BL
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 576-1026-5; 576-1510-5; 576-1510-5; KSZ8721B

Revision History
April 2005
KS8721B/BT
Revision Date
1.0
2.0
2.1
2.2
2.3
2.3
2/29/02
4/01/02
1/31/03
8/29/03
1/24/04
3/16/05
Summary of Changes
Document Origination (Preliminary)
Update timing Spec from page 33 to page 37
Change Revision ID from 1000 to 1001
Add new control register bit, Control Register 0 Bit 0, to control transmit enable/disable
Add 8h register map on the table
Editorial Change on FXSD/FXEN pin34
Change on duplex pin38 0=half and 1=full duplex
Change on the 10BT MII transmit timing 1.0us to 2.5us and Tlat 2.5us to 4BT
Add the TEST description mode on pin26
Add part number ordering information & remove pinout diagram
Edited pin description on the IO cloumn
Change the company logo, disclaimer, & contact info
Editorial changes on Stapping option description
Change on Register0h bit0, 1=disable and 0=enable
Add remote fault register4h bit13.
Add normal operating condition table & Thermal data for SSOP48 table
Add Reset Timing table & Transformer Lists
Add 48 TQFP pinout diagram & RMII AC Charateristics
Add ordering info for 48 Pin TQFP package, KS8721B/BTI industrial temperature, KSY8721B/KSY8721BT
environmentally friendly part number
Change part number from KS8721B to KS8721B/BT.
Change ordering info. from “KSY” to “KSZ” for lead free.
Change pin name from RMII_LPBK to RMII_BTB
Convert to new format.
MDIO pull-up resistor value changed to 4.7kΩ.
Added note on strapping option pins.
Updated bit 1b.0 - 1b.7 to self-clearing.
Updated Electrical Characteristic.
Updated bit 1f4:2 to resetted.
Added additional magnetics to qualified transformer.
Added reset reference circuit.
Added RMII timing specification.
3
M9999-041405
Micrel, Inc.