STHS4257A1M6F STMicroelectronics, STHS4257A1M6F Datasheet - Page 10

• Manufacturer Part Number: STHS4257A1M6F
• Description: IC CTLR PD IEEE 802.3AF 8SOIC
• Manufacturer: STMicroelectronics

Specifications of STHS4257A1M6F

• Controller Type: Power over Ethernet Controller (POE)
• Interface: IEEE 802.3af
• Voltage - Supply: 5V
• Current - Supply: 50µA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6323-2

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Figure 7.
1. Ref.1 = I
2. Ref. 2 = I
Figure 8.
R CLASS
equipment (PSE)
power sourcing
V IN
NC
NC
48V from
LIMIT HIGH
LIMIT LOW
1
2
3
4
Block diagram (STHS4257A1/L1)
Typical application circuit (STHS4257A1/L1) with a DC/DC converter
ref1 (1)
ref2 (2)
Bridge
~
~
Diode
DF01S
Circuits
Control
R S
+
–
Classification
Current Load
ref
0.1µF
100V
C1
+
–
+
–
SMAJ58A
Powered Device (PD)
R CLASS
EN
EN
Current
Input
Limit
STHS4257A1/L1
R CLASS
V IN
Power Good
Signature
Power
MOSFET
Resistor
SIGDISA
PWRGD
25k
V OUT
GND
9k
16k
100
k
Signature Disable
+
(min)
100V
C2
5µF
SHDN
Switching
Supply
Power
RTN
V IN
8
7
6
5
SIGDISA
PWRGD
V OUT
GND
AI12208a
AI12209a
+
3V
to logic
–