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STHS4257L1 Datasheet

Part Number STHS4257L1
Manufacturers STMicroelectronics
Logo STMicroelectronics
Description IEEE 802.3af PoE Powered Device (PD) interface controller
Datasheet STHS4257L1 DatasheetSTHS4257L1 Datasheet (PDF)

STHS4257A, STHS4257A1 STHS4257L, STHS4257L1 IEEE 802.3af PoE Powered Device (PD) interface controller with integrated signature resistor www.datasheet4u.com 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 (STHS4257A1/L1) Resistor-programmable classification current (Class 0-4) Power Good outp.

  STHS4257L1   STHS4257L1






Part Number STHS4257L
Manufacturers STMicroelectronics
Logo STMicroelectronics
Description IEEE 802.3af PoE Powered Device (PD) interface controller
Datasheet STHS4257L1 DatasheetSTHS4257L Datasheet (PDF)

STHS4257A, STHS4257A1 STHS4257L, STHS4257L1 IEEE 802.3af PoE Powered Device (PD) interface controller with integrated signature resistor www.datasheet4u.com 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 (STHS4257A1/L1) Resistor-programmable classification current (Class 0-4) Power Good outp.

  STHS4257L1   STHS4257L1







IEEE 802.3af PoE Powered Device (PD) interface controller

STHS4257A, STHS4257A1 STHS4257L, STHS4257L1 IEEE 802.3af PoE Powered Device (PD) interface controller with integrated signature resistor www.datasheet4u.com 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 (STHS4257A1/L1) Resistor-programmable classification current (Class 0-4) Power Good output, open drain Undervoltage Lockout (UVLO) Thermal overload protection (two-step for the STHS4257A/L) Latch (L) or auto-retry (A) after repetitive thermal overload Industrial temperature range: –40 to +85°C SO8 and DFN8 (3mm x 3mm) packages RoHS compliant 8 1 SO8 (M) DFN8 3mm x 3mm (DB) 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 e et c u d o r ) s t( UVLO threshold, rising (V) UVLO threshold, falling (V) Protection mode Thermal overload protection 2 steps 1 step 2 steps 1 step Inrush current limit (mA, typ) Normal operation current limit (mA, typ) Auto Auto Latch Latch 350/188 (1) 140 350/188 (1) 140 375 375 STHS4257A1 STHS4257L STHS4257L1 ✔ 36.0 1. Current limit is common for both modes and gets reduced only in case of therm.


2009-05-02 : STW13009    D784225GC    K2642-01MR    STHS2375A    STHS2376L    STHS2375L    STHS2377A    STHS2376A    STHS2377L    STHS4257A   


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