- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄360998 > ISP1123NB (NXP SEMICONDUCTORS) Universal Serial Bus compound hub PDF資料下載
參數(shù)資料
| 型號： | ISP1123NB |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線控制器 |
| 英文描述： | Universal Serial Bus compound hub |
| 中文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PDIP32 |
| 封裝： | 0.400 INCH, PLASTIC, SDIP-32 |
| 文件頁數(shù)： | 24/49頁 |
| 文件大小： | 1155K |
| 代理商： | ISP1123NB |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當(dāng)前第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁
Philips Semiconductors
ISP1123
USB compound hub
Preliminary specification
Rev. 01 — 5 October 1999
24 of 49
9397 750 06325
Philips Electronics N.V. 1999. All rights reserved.
In case of global overcurrent detection an increased voltage drop is needed for the
overcurrent sense device (in this case a low-ohmic resistor). This can be realized by
using a special power supply of 5.1 V
±
3%, as shown in
Figure 8
.
12.1.2
Bus-powered hubs
Bus-powered hubs are guaranteed to receive a supply voltage of 4.5 V at the
upstream port connector and must provide a minimum of 4.4 V to the downstream
port connectors. The voltage drop of 100 mV across bus-powered hubs includes:
Hub PCB (power and ground traces, ferrite beads)
Power switch (FET on-resistance)
Overcurrent sense device.
The PCB resistance may cause a drop of 25 mV, which leaves 75 mV for the power
switch and overcurrent sense device. The voltage drop components are shown in
Figure 9
.
For bus-powered hubs overcurrent protection is optional. It may be implemented for
all downstream ports on a global or individual basis.
(1) Includes PCB traces, ferrite beads, etc.
Fig 8.
Typical voltage drop components in self-powered mode using global overcurrent detection.
handbook, full pagewidth
5.1 V KICK-UP
POWER SUPPLY
±
3% regulated
+
4.95 V(min)
MBL089
low-ohmic
PMOS switch
ISP1123
power
switch
VBUS
D
+
D
GND
SHIELD
4.75 V(min)
downstream
port
connector
hub board
resistance
voltage drop
25 mV
voltage drop
75 mV
low-ohmic
sense resistor
for overcurrent
detection
voltage drop
100 mV
(1)
(1) Includes PCB traces, ferrite beads, etc.
Fig 9.
Typical voltage drop components in bus-powered mode (no overcurrent detection).
handbook, full pagewidth
MBL090
low-ohmic
PMOS switch
ISP1123
power
switch
VBUS
D
+
D
GND
SHIELD
VBUS
D
+
D
GND
SHIELD
4.40 V(min)
4.50 V(min)
downstream
port
connector
upstream
port
connector
hub board
resistance
voltage drop
25 mV
voltage drop
75 mV
(1)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISP1130 | Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130DL | Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130N | Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1160 | Embedded Universal Serial Bus Host Controller |
| ISP1160BD | Embedded Universal Serial Bus Host Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISP1130 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130DL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1130N | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus compound hub with integrated keyboard controller |
| ISP1160 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Embedded Universal Serial Bus Host Controller |
| ISP1160BD | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Embedded Universal Serial Bus Host Controller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。