STHS4257L
STHS4257L is IEEE 802.3af PoE Powered Device (PD) interface controller manufactured by STMicroelectronics.
- Part of the STHS4257A comparator family.
- Part of the STHS4257A comparator family.
STHS4257A, STHS4257A1 STHS4257L, STHS4257L1
IEEE 802.3af Po E Powered Device (PD) interface controller with integrated signature resistor
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Features
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IEEE 802.3af-pliant interface for Powered Devices (PDs) Integrated 100V, 450m A 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 Ro HS pliant
8 1
SO8 (M)
DFN8 3mm x 3mm (DB)
Applications
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- Voice over IP (Vo IP) phones
Table 1.
Device options
Signature disable
Order code s b O
STHS4257A t e ol o r e P
✔
) s t( c du
39.2 36.0 39.2 30.5 30.5 30.5 30.5
-O
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- l o...
