STHS4257L datasheet(1/18 Pages) STMICROELECTRONICS

부품명	STHS4257L

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

PDF	18 Pages

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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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1 / 18 page

July 2007

Rev 4

1/18

1

STHS4257A, STHS4257A1

STHS4257L, STHS4257L1

IEEE 802.3af PoE Powered Device (PD)

interface controller with integrated signature resistor

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 25k

Ω 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

Applications

■ Voice over IP (VoIP) phones

■ Web cameras

■ WLAN access points

■ Internet appliances

■ POS terminals

■ RFID readers

DFN8 3mm x 3mm (DB)

SO8 (M)

8

1

Table 1.

Device options

Order code

Signature

disable

UVLO

threshold,

rising (V)

UVLO

threshold,

falling (V)

Protection

mode

Thermal

overload

protection

Inrush

current limit

(mA, typ)

Normal

operation

current limit

(mA, typ)

STHS4257A

39.2

30.5

Auto

2 steps

350/188 (1)

STHS4257A1

✔

36.0

30.5

Auto

1 step

140

375

STHS4257L

39.2

30.5

Latch

2 steps

350/188 (1)

STHS4257L1

✔

36.0

30.5

Latch

1 step

140

375

1.

Current limit is common for both modes and gets reduced only in case of thermal overload. See Table 5: Electrical parameters.

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Obsolete

Product(s)

- Obsolete

Product(s)

유사한 부품 번호 - STHS4257L

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STMicroelectronics	STHS2375A	190Kb / 20P	IEEE 802.3af PoE Powered Device (PD) interface controller 26-Jul-2007
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유사한 설명 - STHS4257L

제조업체	부품명	데이터시트	상세설명
STMicroelectronics	STHS2375A	190Kb / 20P	IEEE 802.3af PoE Powered Device (PD) interface controller 26-Jul-2007
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ON Semiconductor	NCP1092DG	176Kb / 12P	Integrated IEEE 802.3af PoE-PD Interface Controller February, 2011 ??Rev. 2
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ON Semiconductor	NCP1092DBRG	176Kb / 12P	Integrated IEEE 802.3af PoE-PD Interface Controller February, 2011 ??Rev. 2
	NCP1091DBRG	176Kb / 12P	Integrated IEEE 802.3af PoE-PD Interface Controller February, 2011 ??Rev. 2
	NCP1090DBRG	176Kb / 12P	Integrated IEEE 802.3af PoE-PD Interface Controller February, 2011 ??Rev. 2
Monolithic Power System...	MP8003A	825Kb / 17P	IEEE 802.3af/at, PoE, Powered Device, Interface Controller
	MP8005	303Kb / 11P	13W 802.3af PoE Powered Device (PD) Interface and PWM Controller
	EV8003A-Q-00A	290Kb / 6P	IEEE 802.3af/at PoE Powered Device Interface Controller Evaluation Board

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STHS4257L 데이터시트(PDF) 1 Page - STMicroelectronics

STHS4257L 데이터시트(HTML) 1 Page - STMicroelectronics

유사한 부품 번호 - STHS4257L

유사한 설명 - STHS4257L

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