KSZ8721BL Micrel Inc, KSZ8721BL Datasheet - Page 7

• 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

May 2004
Notes:
1. P = Power supply.
KS8721BL/SL
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.
19
20
21
22
23
24
25
26
27
28
29
30
LED0/TEST
Pin Name
RMII_BTB
COL/RMII
NWAYEN
PHYAD0
SPD100/
VDDIO
LED1/
LED2/
LED3/
TXD2
TXD3
CRS/
INT#/
nFEF
GND
PD#
Type
Ipd/O
Ipd/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
Ipu/O
GND
Ipd
Ipd
Ipu
P
(1)
Pin Function
MII Transmit Data Input.
MII Transmit Data Input.
MII Collision Detect Output.
During reset, the pull-up/pull-down value is latched as RMII select. See “Strapping
Options” section for details.
MII Carrier Sense Output.
During reset, the pull-up/pull-down value is latched as RMII back-to-back mode
when RMII mode is selected. See “Strapping Options” section for details.
Ground.
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.
Management Interface (MII) Interrupt Out. Interrupt level set by
Register 1f, bit 9.
During reset, latched as PHYAD[0]. See “Strapping Options” section for details.
Link/Activity LED Output. The external pull-down enable test mode and only used
for the factory test. Active low.
Link/Act
No Link
Link
Act
Speed LED Output. Latched as SPEED (Register 0, bit 13) during power-up/
reset. See “Strapping Options” section for details. Active low.
Speed
10BT
100BT
Full-duplex LED Output. Latched as DUPLEX (register 0h, bit 8) during power-up/
reset. See “Strapping DUPLEX Options” section for details. Active low.
Duplex
Half
Full
Collision LED Output. Latched as ANEG_EN (register 0h, bit 12) during power-up/
reset. See “Strapping Options” section for details.
Collison
No Collision
Collision
Power Down. 1 = Normal operation, 0 = Power-down. Active low.
Pin State
H
L
Pin State
H
L
—
Pin State
H
L
Pin State
H
L
7
LED Definition
“Off”
“On”
“Toggle”
LED Definition
“Off”
“On”
LED Definition
“Off”
“On”
LED Definition
“Off”
“On”
PHYAD0
M9999-051704
Micrel