參數(shù)資料
型號： MAX5945CAX+
廠商： Maxim Integrated Products
文件頁數(shù)： 40/44頁
文件大?。?/td> 0K
描述： IC NETWORK PWR CTRL 36-SSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 30
控制器類型： 網(wǎng)絡(luò)電源控制器
接口： I²C
電源電壓： 3.3V
電流 - 電源： 4.2mA
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 36-BSOP（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 36-SSOP
包裝： 管件
MAX5945
Quad Network Power Controller
for Power-Over-LAN
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(AGND = +32V to +60V, VEE = 0V, VDD to DGND = +3.3V, all voltages are referenced to VEE, unless otherwise noted. Typical
values are at AGND = +48V, DGND = +48V, VDD = (DGND + 3.3V), TA = +25°C. Currents are positive when entering the pin and
negative otherwise.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Internal Input Pullup/Pulldown
Resistor
RDIN
Pullup (pulldown) resistor to VDD (DGND) to set
default level
25
50
75
k
Open-Drain Output Low
Voltage
VOL
ISINK = 15mA
0.4
V
Open-Drain Leakage
IOL
Open-drain high impedance, VO = 3.3V
2
A
TIMING
Startup Time
tSTART
Time during which a current limit set by VSU_LIM
is allowed, starts when the GATE_
is turned on (Note 8)
50
60
70
ms
Fault Time
tFAULT
Maximum allowed time for an overcurrent
condition set by VFLT_LIM after startup (Note 8)
50
60
70
ms
Port Turn-Off Time
tOFF
Minimum delay between any port turning off,
does not apply in the case of a reset
0.5
0.75
1.0
ms
Detection Time
tDET
Maximum time allowed before detection
is completed
320
ms
Midspan Mode Detection
Delay
tDMID
2.0
2.4
s
Classification Time
tCLASS
Time allowed for classification
40
ms
VEEUVLO Turn-On Delay
tDLY
Time VAGND must be above the VEEUVLO
thresholds before the device operates
24
ms
RSTR bits = 00
16 x
tFAULT
RSTR bits = 01
32 x
tFAULT
RSTR bits = 10
64 x
tFAULT
Restart Timer
tRESTART
Time a port has to wait
before turning on after an
overcurrent fault,
RSTR_EN bit = high
RSTR bits = 11
0
ms
Watchdog Clock Period
tWD
Rate of decrement of the watchdog timer
164
ms
TIMING CHARACTERISTICS for 2-WIRE FAST MODE (Figures 5 and 6)
Serial Clock Frequency
fSCL
(Note 9)
400
kHz
Bus Free Time Between a
STOP and a START Condition
tBUF
(Note 9)
1.2
s
Hold Time for Start Condition
tHD, STA
(Note 9)
0.6
s
Low Period of the SCL Clock
tLOW
(Note 9)
1.2
s
High Period of the SCL Clock
tHIGH
(Note 9)
0.6
s
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參數(shù)描述
MAX5945CAX+ 功能描述:熱插拔功率分布 IEEE 802.3af Quad Net Pwr Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5945CAX+T 功能描述:熱插拔功率分布 IEEE 802.3af Quad Net Pwr Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5945CAX-T 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5945EAX 功能描述:熱插拔功率分布 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MAX5945EAX+ 功能描述:熱插拔功率分布 IEEE 802.3af Quad Net Pwr Controller RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
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