MAX5980GTJ+T Maxim Integrated, MAX5980GTJ+T Datasheet - Page 36

• 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

Quad, IEEE 802.3at/af PSE Controller
for Power-over-Ethernet
Table 19. Operating Mode Register
Table 20. Port Operating Mode Status
Table 21. Disconnect Enable Register
The Operating Mode register in the device (R12h, Table
19) contains 2 bits per port that set the port mode of
operation. Table 20 details how to set the mode of
operation for the device. On a power-up or after a reset
condition, if AUTO = 1, the Operating Mode register is
set to a default value of FFh. If AUTO = 0, the Operating
Mode register is set to 00h. Use software to program
the mode of operation. The software port specific reset
using RESET_P_ (R1Ah[3:0]), Table 27) does not affect
the mode register.
36
P4_M[1:0]
P3_M[1:0]
P2_M[1:0]
P1_M[1:0]
DCD_EN4
DCD_EN3
DCD_EN2
DCD_EN1
SYMBOL
ACD_EN4
ACD_EN3
ACD_EN2
ACD_EN1
SYMBOL
Configuration Registers (R12h–R17h)
ADDRESS = 12h
ADDRESS = 13h
MODE[1:0]
BIT NO.
00
01
10
11
BIT NO.
Operating Mode Register (R12h)
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
TYPE
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
MODE[1:0] for port 4
MODE[1:0] for port 3
MODE[1:0] for port 2
MODE[1:0] for port 1
Enable DC disconnect detection on port 4
Enable DC disconnect detection on port 3
Enable DC disconnect detection on port 2
Enable DC disconnect detection on port 1
Enable DC disconnect detection on port 4
Enable DC disconnect detection on port 3
Enable DC disconnect detection on port 2
Enable DC disconnect detection on port 1
The Disconnect Enable register (R13h, Table 21) is
used to enable DC load disconnect detection. On
power-up or after a reset condition, if AUTO = 1, this
register is reset to a default value of F0h. If AUTO = 0,
it is set to 00h. Setting either ACD_EN_ (R13h[7:4]) or
DCD_EN _ (R13h[3:0]) to 1 enables the DC load discon-
nect detection feature on the corresponding port. To dis-
able DC load disconnect on a port, both the ACD_EN_
and DCD_EN_ bit for that port must be set low.
DESCRIPTION
DESCRIPTION
Auto (automatic)
DESCRIPTION
Semiautomatic
Shutdown
Manual
Disconnect Enable Register (R13h)