KSZ8721BL Micrel Inc, KSZ8721BL Datasheet - Page 6

• 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

KS8721BL/SL
Pin Description
Notes:
1. P = Power supply.
M9999-051704
Pin Number
GND = Ground.
I = Input.
I/O = Bidirectional.
Ipd = Input w/ internal pull-down.
Ipd/O = Input w/ internal pull-down during reset, output pin otherwise.
Ipu = Input w/ internal pull-up.
Ipu/O = Input w/ internal pull-up during reset, output pin otherwise.
O = Output.
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
PCS_LPBK
RXER/ISO
Pin Name
PHYAD2
PHYAD3
PHYAD4
REFCLK
CRSDV/
PHYAD
VDDIO
RXDV/
RXD3/
RXD2/
RXD1/
RXD0/
VDDC
TXER
TXEN
MDIO
TXD0
TXD1
MDC
TXC/
GND
RXC
GND
Type
Ipd/O
Ipd/O
Ipd/O
Ipd/O
Ipd/O
Ipd/O
GND
GND
Ipd
Ipd
Ipd
Ipd
I/O
I/O
P
O
P
I
(1)
Pin Function
Management Independent Interface (MII) Data I/O. This pin requires an external
10K pull-up resistor.
MII Clock Input. This pin is synchronous to the MDIO.
MII Receive Data Output. RXD [3..0], these bits are synchronous with RXCLK.
When RXDV is asserted, RXD [3..0] presents valid data to MAC through the MII.
RXD [3..0] is invalid when RXDV is de-asserted.
During reset, the pull-up/pull-down value is latched as PHYADDR [1]. See
“Strapping Options” section for details.
MII Receive Data Output.
During reset, the pull-up/pull-down value is latched as PHYADDR[2]. See
“Strapping Options” section for details.
MII Receive Data Output.
During reset, the pull-up/pull-down value is latched as PHYADDR [3]. See
“Strapping Options” section for details.
MII Receive Data Output.
During reset, the pull-up/pull-down value is latched as PHYADDR [4]. See
“Strapping Options” section for details.
Digital IO 2.5 /3.3V tolerant power supply. 3.3V power Input of voltage
regulator. See “Circuit Design Ref. for Power Supply" section for details.
Ground.
MII Receive Data Valid Output.
During reset, the pull-up/pull-down value is latched as PCS_LPBK. See
“Strapping Options” section for details.
MII Receive Clock Output. Operating at 25MHz = 100Mbps, 2.5MHz = 10Mbps.
MII Receive Error Output.
During reset, the pull-up/pull-down value is latched as ISOLATE during reset. See
“Strapping Options” section for details.
Ground.
Digital core 2.5V only power supply. See “Circuit Design Ref. for Power Supply"
section for details.
MII Transmit Error Input.
MII Transmit Clock Output.
Input for crystal or an external 50MHz clock. When REFCLK pin is used for
REF clock interface, pull up XI to VDDPLL 2.5V via 10k
XO pin unconnected.
MII Transmit Enable Input.
MII Transmit Data Input.
MII Transmit Data Input.
6
resistor and leave
May 2004
Micrel