KSZ8721BL Micrel Inc, KSZ8721BL Datasheet - Page 32
![IC TXRX PHY 10/100 3.3V 48-LQFP](/photos/6/81/68171/576-48-lqfp_sml.jpg)
KSZ8721BL
Manufacturer Part Number
KSZ8721BL
Description
IC TXRX PHY 10/100 3.3V 48-LQFP
Manufacturer
Micrel Inc
Type
Transceiverr
Specifications of KSZ8721BL
Number Of Drivers/receivers
1/1
Protocol
MII, RMII
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Package / Case
48-LQFP
Data Rate
100Mbps
No. Of Ports
1
Ethernet Type
IEEE 802.3u
Supply Current
151mA
Supply Voltage Range
3.3V
Operating Temperature Range
0°C To +70°C
Digital Ic Case Style
LQFP
No. Of Pins
48
Interface Type
MII, RMII
Rohs Compliant
Yes
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
576-1028-5
576-1511-5
576-1511-5
KSZ8721BL
576-1511-5
576-1511-5
KSZ8721BL
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Micrel, Inc.
At power-on-reset, R, C, and D1 provide the necessary ramp rise time to reset the Micrel device. The reset out from
CPU/FPGA provides warm reset after power up. It is also recommended to power up the VDD core voltage earlier than
VDDIO voltage. At worst case, the both VDD core and VDDIO voltages should come up at the same time.
Reference Circuit for Strapping Option Configuration
Figure 12 shows the reference circuit for strapping option pins.
June 2009
Reference circuits for unmanaged programming through LED ports.
Figure 11. Recommended Circuit for Interfacing with CPU/FPGA Reset
Figure 12. Reference Circuit, Strapping Option Pins
KS8721BL/SL
KS8721BL/SL
Pull-down
KS8721BL/SL
Pull-Up
D1: 1N4148
RST
32
LED pin
LED pin
D1
10µF
VCC
C
3.3V
3.3V
R
10k
M9999-062509-1.3
KS8721BL/SL