MAX5980GTJ+T Maxim Integrated, MAX5980GTJ+T Datasheet - Page 34

• Manufacturer Part Number: MAX5980GTJ+T
• Description: Power Switch ICs - POE / LAN 0-16V Hot-Swap Controller
• Manufacturer: Maxim Integrated

Specifications of MAX5980GTJ+T

• Rohs: yes
• Number Of Switches: Quad
• Off Time (max): 0.1 ms
• Operating Supply Voltage: 32 V to 60 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Maximum Power Dissipation: 2758.6 mW
• Minimum Operating Temperature: - 40 C
• Operating Supply Current: 5 mA

Table 13. Port Status Register
Table 15. Classification Result Decoding Chart
Quad, IEEE 802.3at/af PSE Controller
for Power-over-Ethernet
Table 14. Detection Result Decoding Chart
The Port Status registers (R0Ch–R0Fh, Table 13) record
the results of the port detection and classification at the
end of each phase in three encoded bits. On power-
up or after a reset condition, the Port Status register
is set to a default value of 00h. Tables 14 and 15 are
the detection and classification result decoding tables
respectively. For LEG_EN = 0 (Port GPMD register, Table
34
DET_ST_[2:0]
CLASS_[2:0]
ADDRESS = 0Ch, 0Dh, 0Eh, 0Fh
SYMBOL
Reserved
Reserved
DET_ST_[2:0]
000
001
010
011
100
101
110
111
Status Registers (R0Ch–R11h)
Port Status Registers (R0Ch–R0Fh)
BIT NO.
7
6
5
4
3
2
1
0
CLASS_[2:0]
000
001
010
011
100
101
110
111
TYPE
—
—
R
R
R
R
R
R
DETECTED
HIGH CAP
DET_OK
RHIGH
Reserved
Classification result for the corresponding port (Table 14)
Reserved
Detection result for the corresponding port (Table 13)
RLOW
NONE
OPEN
DCP
DCN
Detection status unknown (default)
Positive DC supply connected at the port (V
High capacitance at the port (> 8.5FF (typ))
Low resistance at the port (R
Detection pass (15kI > R
High resistance at the port (R
Open port (I
Low impedance to V
39), the detection result is shown in Table 13. When
CLC_EN = 1, the device allows valid detection of high
capacitive loads of up to 100FF (typ), and reports the
result as HIGH_CAP. If CL5_EN_ = 1, any classification
current in excess of Class 4 but less than the classifica-
tion current limit will return a Class 5 classification result.
If CL5_EN_ = 0, any classification current in excess of
Class 4 will return a current-limit classification result, and
the port will not power up.
OUT_
DESCRIPTION
< 10FA)
EE
at the port (V
DESCRIPTION
CLASS RESULT
DET
Current limit
DET
Unknown
DET
> 33kI)
< 15kI)
1
2
3
4
5
0
> 33kI)
OUT_
- V
AGND
EE
< 2V)
- V
OUT_
< 1V)