Datasheet > MAX5945CAX

MAX5945CAX

更新时间： 2024-11-18 22:55:19

品牌	Logo	应用领域
美信 - MAXIM		控制器局域网
页数	文件大小	规格书
44页	572K
描述
Quad Network Power Controller for Power-Over-LAN

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MAX5945CAX 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	SSOP
包装说明：	0.80 MM PICTH, SSOP-36	针数：	36
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.89
其他特性：	PROGRAMMBLE I2C INTERFACE	可调阈值：	YES
模拟集成电路 - 其他类型：	POWER SUPPLY MANAGEMENT CIRCUIT	JESD-30 代码：	R-PDSO-G36
JESD-609代码：	e0	长度：	15.415 mm
湿度敏感等级：	1	信道数量：	4
功能数量：	1	端子数量：	36
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	SSOP
封装等效代码：	SOP36,.4,32	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE, SHRINK PITCH	峰值回流温度（摄氏度）：	245
电源：	1.8/5 V	认证状态：	Not Qualified
座面最大高度：	2.64 mm	子类别：	Power Management Circuits
最大供电电流 (Isup)：	6.8 mA	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	3 V	标称供电电压 (Vsup)：	3.3 V
表面贴装：	YES	技术：	BICMOS
温度等级：	COMMERCIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.8 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	7.495 mm	Base Number Matches：	1

MAX5945CAX 数据手册

19-3428; Rev 1; 9/05

Quad Network Power Controller

for Power-Over-LAN

General Description

Features

The MAX5945 quad network power controller is designed

for use in IEEE 802.3af-compliant power-sourcing equip-

ment (PSE). The device provides power devices (PD) dis-

covery, classification, current-limit, and both DC and AC

load disconnect detections. The MAX5945 can be used

in either endpoint PSE (LAN switches/routers) or midspan

PSE (power injector) applications. The MAX5945 is pin

and function compatible with LTC4259A.

♦ IEEE 802.3af Compliant

♦ Pin and Function Compatible with LTC4259A

♦ Controls Four Independent, -48V-Powered

Ethernet Ports in Either Endpoint or Midspan PSE

Applications

♦ Wide Digital Power Input, V

, Common-Mode

DIG

Range: V to (AGND + 7.7V)

The MAX5945 can operate autonomously or be con-

trolled by software through an I²C*-compatible inter-

face. Separate input and output data lines (SDAIN and

SDAOUT) allow usage with optocouplers. The

MAX5945 is a slave device. Its four address inputs

allow 16 unique MAX5945 addresses. A separate INT

output and four independent shutdown inputs (SHD_)

allow fast response from a fault to port shutdown. A

RESET input allows hardware reset of the device. A

special watchdog feature allows the hardware to grace-

fully take over control if the software crashes. A

cadence timing feature allows the MAX5945 to be used

in midspan systems.

♦ PD Violation of Class Current Protection

♦ PD Detection and Classification

♦ Provides Both DC and AC Load Removal

Detections

♦ I²C-Compatible, 3-Wire Serial Interface

♦ Fully Programmable and Configurable Operation

Through I²C Interface

♦ Current Foldback and Duty-Cycle-

Controlled/Programmable Current Limit

♦ Short-Circuit Protection with Fast Gate Pulldown

♦ Direct Fast Shutdown Control Capability

♦ Programmable Direct Interrupt Output

The MAX5945 is fully software configurable and program-

mable. A class-overcurrent detection function enables

system power management to detect if a PD draws more

current than the allowable amount for its class. Other fea-

tures are input under/overvoltage lockout, overtempera-

ture protection, output-voltage slew-rate limit during

startup, power-good, and fault status. The MAX5945’s

programmability includes gate-charging current, current-

limit threshold, startup timeout, overcurrent timeout,

autorestart duty cycle, PD disconnect AC detection

threshold, and PD disconnect detection timeout.

♦ Watchdog Mode Enable Hardware Graceful

Takeover

Ordering Information

PART

TEMP RANGE

0°C to +70°C

PIN-PACKAGE

36 SSOP

MAX5945CAX**

MAX5945EAX

-40°C to +85°C

36 SSOP

**Future product—contact factory for availability.

The MAX5945 is available in a 36-pin SSOP package

and is rated for both extended (-40°C to +85°C) and

commercial (0°C to +70°C) temperature ranges.

Pin Configuration

TOP VIEW

RESET

MIDSPAN

INT

36 OSC_IN

35 AUTO

34 OUT1

Applications

Power-Sourcing Equipment (PSE)

Power-Over-LAN/Power-Over-Ethernet

Switches/Routers

SCL

33 GATE1

32 SENSE1

31 OUT2

SDAOUT

SDAIN

MAX5945

30 GATE2

29 SENSE2

Midspan Power Injectors

28 V

A0 10

DET1 11

DET2 12

DET3 13

DET4 14

DGND 15

27 OUT3

26 GATE3

25 SENSE3

24 OUT4

23 GATE4

22 SENSE4

21 AGND

20 SHD4

19 SHD3

*Purchase of I C components from Maxim Integrated

Products, Inc. or one of its sublicensed Associated

Companies, conveys a license under the Philips I C Patent

Rights to use these components in an I C system, provided

that the system conforms to the I C Standard Specification as

defined by Philips.

SHD1 17

SHD2 18

Typical Operating Circuits appear at end of data sheet.

SSOP

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...44

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与MAX5945CAX相关器件

型号	品牌	获取价格	描述	数据表
MAX5945CAX-T	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 4 Channel, BICMOS, PDSO36, 0.80 MM PICTH, SSO
MAX5945EAX	MAXIM	获取价格	Quad Network Power Controller for Power-Over-LAN
MAX5945EAX-T	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 4 Channel, BICMOS, PDSO36, 0.80 MM PICTH, SSO
MAX5946	MAXIM	获取价格	Dual PCI Express, Hot-Plug Controller
MAX5946	ADI	获取价格	双通道PCI Express、热插拔控制器
MAX5946AETX	MAXIM	获取价格	Dual PCI Express, Hot-Plug Controller
MAX5946AETX+	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 2 Channel, BICMOS, 6 X 6 MM, 0.90 MM HEIGHT, MO-
MAX5946AETX+T	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 2 Channel, BICMOS, 6 X 6 MM, 0.90 MM HEIGHT, MO-
MAX5946AETX-T	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 2 Channel, BICMOS, 6 X 6 MM, 0.90 MM HEIGHT, MO-
MAX5946LETX	MAXIM	获取价格	Dual PCI Express, Hot-Plug Controller

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