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
March 2006
Revision Date
Revision Date
Revision Date
1.0
1.0
1.0
1.0
2.0
2.0
2.0
2.0
2.1
2.1
2.1
2.1
2.2
2.2
2.2
2.2
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2/29/02
2/29/02
2/29/02
2/29/02
4/01/02
4/01/02
4/01/02
4/01/02
1/31/03
1/31/03
1/31/03
1/31/03
8/29/03
8/29/03
8/29/03
8/29/03
1/24/04
1/24/04
1/24/04
1/24/04
3/16/05
3/16/05
3/16/05
3/16/05
Summary of Changes
Summary of Changes
Summary of Changes
Document Origination (Preliminary)
Document Origination (Preliminary)
Document Origination (Preliminary)
Document Origination (Preliminary)
Update timing Spec from page 33 to page 37
Update timing Spec from page 33 to page 37
Update timing Spec from page 33 to page 37
Update timing Spec from page 33 to page 37
Change Revision ID from 1000 to 1001
Change Revision ID from 1000 to 1001
Change Revision ID from 1000 to 1001
Change Revision ID from 1000 to 1001
Add new control register bit, Control Register 0 Bit 0, to control transmit enable/disable
Add new control register bit, Control Register 0 Bit 0, to control transmit enable/disable
Add new control register bit, Control Register 0 Bit 0, to control transmit enable/disable
Add new control register bit, Control Register 0 Bit 0, to control transmit enable/disable
Add 8h register map on the table
Add 8h register map on the table
Add 8h register map on the table
Add 8h register map on the table
Editorial Change on FXSD/FXEN pin34
Editorial Change on FXSD/FXEN pin34
Editorial Change on FXSD/FXEN pin34
Editorial Change on FXSD/FXEN pin34
Change on duplex pin38 0=half and 1=full duplex
Change on duplex pin38 0=half and 1=full duplex
Change on duplex pin38 0=half and 1=full duplex
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
Change on the 10BT MII transmit timing 1.0us to 2.5us and Tlat 2.5us to 4BT
Change on the 10BT MII transmit timing 1.0us to 2.5us and Tlat 2.5us to 4BT
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 the TEST description mode on pin26
Add the TEST description mode on pin26
Add the TEST description mode on pin26
Add part number ordering information & remove pinout diagram
Add part number ordering information & remove pinout diagram
Add part number ordering information & remove pinout diagram
Add part number ordering information & remove pinout diagram
Edited pin description on the IO cloumn
Edited pin description on the IO cloumn
Edited pin description on the IO cloumn
Edited pin description on the IO cloumn
Change the company logo, disclaimer, & contact info
Change the company logo, disclaimer, & contact info
Change the company logo, disclaimer, & contact info
Change the company logo, disclaimer, & contact info
Editorial changes on Stapping option description
Editorial changes on Stapping option description
Editorial changes on Stapping option description
Editorial changes on Stapping option description
Change on Register0h bit0, 1=disable and 0=enable
Change on Register0h bit0, 1=disable and 0=enable
Change on Register0h bit0, 1=disable and 0=enable
Change on Register0h bit0, 1=disable and 0=enable
Add remote fault register4h bit13.
Add remote fault register4h bit13.
Add remote fault register4h bit13.
Add remote fault register4h bit13.
Add normal operating condition table & Thermal data for SSOP48 table
Add normal operating condition table & Thermal data for SSOP48 table
Add normal operating condition table & Thermal data for SSOP48 table
Add normal operating condition table & Thermal data for SSOP48 table
Add Reset Timing table & Transformer Lists
Add Reset Timing table & Transformer Lists
Add Reset Timing table & Transformer Lists
Add Reset Timing table & Transformer Lists
Add 48 TQFP pinout diagram & RMII AC Charateristics
Add 48 TQFP pinout diagram & RMII AC Charateristics
Add 48 TQFP pinout diagram & RMII AC Charateristics
Add 48 TQFP pinout diagram & RMII AC Charateristics
Add ordering info for 48 Pin TQFP package, KS8721B/BTI industrial temperature, KSY8721B/KSY8721BT
Add ordering info for 48 Pin TQFP package, KS8721B/BTI industrial temperature, KSY8721B/KSY8721BT
Add ordering info for 48 Pin TQFP package, KS8721B/BTI industrial temperature, KSY8721B/KSY8721BT
Add ordering info for 48 Pin TQFP package, KS8721B/BTI industrial temperature, KSY8721B/KSY8721BT
environmentally friendly part number
environmentally friendly part number
environmentally friendly part number
environmentally friendly part number
Change part number from KS8721B to KS8721B/BT.
Change part number from KS8721B to KS8721B/BT.
Change part number from KS8721B to KS8721B/BT.
Change part number from KS8721B to KS8721B/BT.
Change ordering info. from “KSY” to “KSZ” for lead free.
Change ordering info. from “KSY” to “KSZ” for lead free.
Change ordering info. from “KSY” to “KSZ” for lead free.
Change ordering info. from “KSY” to “KSZ” for lead free.
Change pin name from RMII_LPBK to RMII_BTB
Change pin name from RMII_LPBK to RMII_BTB
Change pin name from RMII_LPBK to RMII_BTB
Change pin name from RMII_LPBK to RMII_BTB
Convert to new format.
Convert to new format.
Convert to new format.
Convert to new format.
MDIO pull-up resistor value changed to 4.7kΩ.
MDIO pull-up resistor value changed to 4.7kΩ.
MDIO pull-up resistor value changed to 4.7kΩ.
MDIO pull-up resistor value changed to 4.7kΩ.
Added note on strapping option pins.
Added note on strapping option pins.
Added note on strapping option pins.
Added note on strapping option pins.
Updated bit 1b.0 - 1b.7 to self-clearing.
Updated bit 1b.0 - 1b.7 to self-clearing.
Updated bit 1b.0 - 1b.7 to self-clearing.
Updated bit 1b.0 - 1b.7 to self-clearing.
Updated Electrical Characteristic.
Updated Electrical Characteristic.
Updated Electrical Characteristic.
Updated Electrical Characteristic.
Updated bit 1f4:2 to resetted.
Updated bit 1f4:2 to resetted.
Updated bit 1f4:2 to resetted.
Updated bit 1f4:2 to resetted.
Added additional magnetics to qualifi ed transformer.
Added additional magnetics to qualifi ed transformer.
Added additional magnetics to qualifi ed transformer.
Added additional magnetics to qualifi ed transformer.
Added reset reference circuit.
Added reset reference circuit.
Added reset reference circuit.
Added reset reference circuit.
Added RMII timing specifi cation.
Added RMII timing specifi cation.
Added RMII timing specifi cation.
Added RMII timing specifi cation.
3
M9999-030106