- 您现在的位置：买卖IC网 > PDF目录179919 > LTC4259ACGW#TRPBF (LINEAR TECHNOLOGY CORP) Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: 0°C to +70°C PDF资料下载
参数资料
| 型号： | LTC4259ACGW#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: 0°C to +70°C |
| 中文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO36 |
| 封装： | 0.300 INCH, LEAD FREE, PLASTIC, SSOP-36 |
| 文件页数： | 31/32页 |
| 文件大小： | 409K |
| 代理商： | LTC4259ACGW#TRPBF |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页当前第31页第32页
LTC4259A
8
4259afb
UU
U
PI FU CTIO S
RESET (Pin 1): Chip Reset, Active Low. When the RESET
pin is low, the LTC4259A is held inactive with all ports off
and all internal registers reset to their power-up states.
When RESET is pulled high, the LTC4259A begins normal
operation. RESET can be connected to an external capaci-
tor or RC network to provide a power turn-on delay.
Internal filtering of the RESET pin prevents glitches less
than 1
s wide from resetting the LTC4259A. Pull RESET
high with
≤10k or tie to VDD.
BYP (Pin 2): Bypass Output. The BYP pin is used to
connect the internally generated – 20V supply to an exter-
nal 0.1
F bypass capacitor. Use a 100V rated 0.1F, X7R
capacitor. Do not connect the BYP pin to any other external
circuitry.
INT (Pin 3): Interrupt Output, Open Drain. INT will pull low
when any one of several events occur in the LTC4259A. It
will return to a high impedance state when bits 6 or 7 are
set in the Reset PB register (1Ah). The INT signal can be
used to generate an interrupt to the host processor,
eliminating the need for continuous software polling.
Individual INT events can be disabled using the Int Mask
register (01h). See Register Functions and Applications
Information for more information. The INT pin is only
updated between I2C transactions.
SCL (Pin 4): Serial Clock Input. High impedance clock
input for the I2C serial interface bus. The SCL pin should
be connected directly to the I2C SCL bus line.
SDAOUT (Pin 5): Serial Data Output, Open Drain Data
Output for the I2C Serial Interface Bus. The LTC4259A uses
two pins to implement the bidirectional SDA function to
simplify optoisolation of the I2C bus. To implement a stan-
dard bidirectional SDA pin, tie SDAOUT and SDAIN together.
See Applications Information for more information.
SDAIN (Pin 6): Serial Data Input. High impedance data input
for the I2C serial interface bus. The LTC4259A uses two
pins to implement the bidirectional SDA function to sim-
plify optoisolation of the I2C bus. To implement a standard
bidirectional SDA pin, tie SDAOUT and SDAIN together.
See Applications Information for more information.
AD3 (Pin 7): Address Bit 3. Tie the address pins high or low
to set the I2C serial address to which the LTC4259A
responds. This address will be (010A3A2A1A0)b. Pull AD3
high or low with
≤10k or tie to VDD or DGND.
AD2 (Pin 8): Address Bit 2. See AD3.
AD1 (Pin 9): Address Bit 1. See AD3.
AD0 (Pin 10): Address Bit 0. See AD3.
DETECT1 (Pin 11): Detect Sense, Port 1. The LTC4259A
Powered Device (PD) detection, classification and AC
disconnect hardware monitors port 1 with this pin. Con-
nect DETECT1 to the output port via a 0.47
F 100V X7R
capacitor in series with a 1k resistor, both in parallel with
a low leakage diode (see Figure 1). The resistor and
capacitor may be eliminated if AC disconnect is not used.
If the port is unused, the DETECT1 pin can be tied to DGND
or allowed to float.
DETECT2 (Pin 12): Detection Sense, Port 2. See DETECT1.
DETECT3 (Pin 13): Detection Sense, Port 3. See DETECT1.
DETECT4 (Pin 14): Detection Sense, Port 4. See DETECT1.
DGND (Pin 15): Digital Ground. DGND should be con-
nected to the return from the 3.3V supply. DGND and
AGND should be tied together.
VDD (Pin 16): Logic Power Supply. Connect to a 3.3V
power supply relative to DGND. VDD must be bypassed to
DGND near the LTC4259A with at least a 0.1
F capacitor.
SHDN1 (Pin 17): Shutdown Port 1, Active Low. When
pulled low, SHDN1 shuts down port 1, regardless of the
state of the internal registers. Pulling SHDN1 low is
equivalent to setting the Reset Port 1 bit in the Reset
Pushbutton register (1Ah). Internal filtering of the SHDN1
pin prevents glitches less than 1
s wide from reseting the
LTC4259A. Pull SHDN1 high with
≤10k or tie to VDD.
SHDN2 (Pin 18): Shutdown Port 2, Active Low. See
SHDN1.
SHDN3 (Pin 19): Shutdown Port 3, Active Low. See
SHDN1.
SHDN4 (Pin 20): Shutdown Port 4, Active Low. See
SHDN1.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4261CUFD#TRPBF | Negative Voltage Hot Swap Controllers with ADC and I2C Monitoring; Package: QFN; No of Pins: 24; Temperature Range: 0°C to +70°C |
| LTC4261CUFD-2#PBF | Negative Voltage Hot Swap Controllers with ADC and I2C Monitoring; Package: QFN; No of Pins: 24; Temperature Range: 0°C to +70°C |
| LTC4261CUFD-2#TRPBF | Negative Voltage Hot Swap Controllers with ADC and I2C Monitoring; Package: QFN; No of Pins: 24; Temperature Range: 0°C to +70°C |
| LTC4261IGN#PBF | Negative Voltage Hot Swap Controllers with ADC and I2C Monitoring; Package: SSOP; No of Pins: 28; Temperature Range: -40°C to +85°C |
| LTC4261IGN#TRPBF | Negative Voltage Hot Swap Controllers with ADC and I2C Monitoring; Package: SSOP; No of Pins: 28; Temperature Range: -40°C to +85°C |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4259AIGW-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect |
| LTC4259AIGW-1#PBF | 功能描述:IC CTRLR POE QUAD AC DISC 36SSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:2,450 系列:- 控制器类型:SPI 总线至 I²C 总线桥接 接口:I²C，串行，SPI 电源电压:2.4 V ~ 3.6 V 电流 - 电源:11mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-HVQFN（4x4） 包装:托盘 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名称:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC4259AIGW-1#TRPBF | 功能描述:IC CTRLR POE QUAD AC DISC 36SSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:2,450 系列:- 控制器类型:SPI 总线至 I²C 总线桥接 接口:I²C，串行，SPI 电源电压:2.4 V ~ 3.6 V 电流 - 电源:11mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-HVQFN（4x4） 包装:托盘 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名称:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC4259CGW-ES | 制造商:LINEAR_TECH 功能描述: |
| LTC4260 | 制造商:LINER 制造商全称:Linear Technology 功能描述:UV, OV and Reverse Supply Protection Controller Low Operating Current: 125μA |
发布紧急采购，3分钟左右您将得到回复。