STHS4257A データシートの表示（PDF） - STMicroelectronics

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STHS4257A

IEEE 802.3af PoE Powered Device (PD) interface controller with integrated signature resistor

STMicroelectronics 

Summary description

STHS4257A, STHS4257A1, STHS4257L, STHS4257L1

Figure 4. Application circuit overview

RJ-45

TX

Pair

Data to Ethernet Physical Layer Device

2x DF01S

SMAJ58A

GND

100

kΩ

SIGDISA(1)

PWRGD

To DC/DC

C1

STHS4257A/L

+ C2

Converter

) Spare

t(s Pair

uc Spare

d Pair

0.1µF,

100V

STHS4257A1/L1

RCLASS

VOUT

VIN

RCLASS

100µF,

100V

te Pro RX

bsole Pair

Data to Ethernet Physical Layer Device

AI12203b

t(s) - O 1. STHS4257A1 and STHS4257L1 devices only. To disable signature, tie this pin to GND.

Obsolete Produc 2. This configuration uses either data wires or spare wires for DC power.

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