参数资料
型号: KS8721SL-EVAL
厂商: Micrel Inc
文件页数: 9/33页
文件大小: 0K
描述: BOARD EVAL EXPERIMENT KS8721SL
标准包装: 1
主要目的: 接口,以太网控制器(PHY 和 MAC)
嵌入式:
已用 IC / 零件: KSZ8721SL
主要属性: 1 个端口,100BASE-TX/100BASE-FX/10BASE-T
次要属性: MII,RMII,自动 MDI,MDIX,>130 米线缆驱动器,LDO,符合 IEEE802.3u 要求
已供物品:
相关产品: KS8721SLA4 TR-ND - TXRX 10/100 3.3V 48-SSOP
KS8721SLA4-ND - TXRX 10/100 3.3V 48-SSOP
KS8721SL-ND - TXRX 10/100 3.3V 48-SSOP
KS8721SLI-ND - IC TXRX PHY 10/100 3.3V 48SSOP
KS8721SL TR-ND - IC TXRX PHY 10/100 3.3V 48SSOP
其它名称: 576-1010
May 2004
17
M9999-051704
KS8721BL/SL
Micrel
Circuit Design Reference for Power Supply
Micrel’s integrated built-in, voltage regulator technology and thoughtful implementation allows the user to save BOM cost on
both existing and future designs with the use of the new KS8721BL/SL single supply, single port 10/100 Ethernet PHY.
7
24
+3.3V
KS8721BL/SL
8
12233536394344
VDDI/O
VDDC
VDDPLL
Voltage
Regulator
10
F
+2.5V
+2.5VPLL
Ferrite Bead
10
F
10
F10F
13
47
+2.5VA
Ferrite Bead
VDDTX
OUT
IN
GND
42
31
38
10
F10F
VDDRX
VDDRCV
Figure 4. Circuit Design
The circuit design in Figure 4 shows the power connections for the power supply: the 3.3V to VDDI/O is the only input power
source and the 2.5V at VDDRCV, pin 38, is the output of the voltage regulator that needs to supply through the rest of the 2.5V
VDD pins via the 2.5V power plane.
The 2.5V VDD pins make the drop-in replacement with the existing KS8721B/BT part. Table 2 shows the drop-in replacement
from the existing KS8721B/BT to the KS8721SL/BL. Please contact your local Micrel FAE for Application Note AN-117, “Drop-
in Replacement with KS8721BT.”
2.5V/3.3V Supply
3.3V Supply with Built-in Regulator
Part Number
Package
Part Number
Package
KS8721B
48-SSOP
KS8721SL
48-SSOP
KS8721BT
48-TQFP
KS8721BL
48-LQFP
KS8721BI
48-SSOP
KS8721SLI
48-SSOP
Table 2. Drop-In Replacement
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