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STHS4257L 数据表(PDF) 6 Page - STMicroelectronics

部件名 STHS4257L
功能描述  IEEE 802.3af PoE Powered Device (PD) interface controller with integrated signature resistor
PDF  18 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STHS4257L 数据表(HTML) 6 Page - STMicroelectronics

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Obsolete
Product(s)
- Obsolete
Product(s)
Summary description
STHS4257A, STHS4257A1, STHS4257L, STHS4257L1
6/18
Figure 1.
Logic diagram
1.
STHS4257A1 and STHS4257L1 devices only.
Figure 2.
Pin connections (STHS4257A/L, top view)
Figure 3.
Pin connections (STHS4257A1/L1, top view)
AI12214a
GND
STHS4257A/L
STHS4257A1/L1
VIN
VOUT
SIGDISA(1)
RCLASS
PWRGD
Table 2.
Signal names
Pin
Symbol
Description
STHS4257A/L STHS4257A1/L1
1, 3, 7
1, 3
NC
No Connect
22
RCLASS
Classification pin
44
VIN
Negative return power line to PSE
55
VOUT
Power Output (negative rail)
66
PWRGD
Power Good Output, open drain, active-low (referenced to VIN)
—
7
SIGDISA
Signature Disable Input, internally pulled to VIN
8
8
GND
Positive Power Supply; common input/output power rail
NC
RCLASS
NC
VIN
GND
NC
VOUT
AI12204b
PWRGD
1
2
3
4
8
7
6
5
NC
RCLASS
NC
VIN
GND
SIGDISA
VOUT
AI12205b
PWRGD
1
2
3
4
8
7
6
5



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