Description
STHS4257A, STHS4257A1 STHS4257L, STHS4257L1 IEEE 802.3af PoE Powered Device (PD) interface controller with integrated signature resistor www.datasheet.
5
1.
Features
* IEEE 802.3af-compliant interface for Powered Devices (PDs) Integrated 100V, 450mA power MOSFET low side switch Inrush current limit Normal operation current limit Integrated 25kΩ signature resistor Signature disable
Applications
* Voice over IP (VoIP) phones
Table 1.
Device options
Signature disable
Order code
s b O
STHS4257A
t e ol
o r eP
✔
) s t( c du
39.2 36.0 39.2 30.5 30.5 30.5 30.5
-O
* l o bs
Web cameras
WLAN access points Internet appliances POS terminals RFID readers
P
