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参数资料
| 型号： | ISP1520BD,557 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 总线控制器 |
| 英文描述： | UNIVERSAL SERIAL BUS CONTROLLER, PQFP64 |
| 封装： | 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64 |
| 文件页数： | 6/54页 |
| 文件大小： | 288K |
| 代理商： | ISP1520BD,557 |
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ISP1520_4
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 04 — 28 April 2006
13 of 53
Philips Semiconductors
ISP1520
Hi-Speed USB hub controller
PSWn_N pins have integrated weak pull-up resistors inside the chip.
8.1.3 Overcurrent protection mode
The ISP1520 supports all overcurrent protection modes: none, global and individual.
No overcurrent protection mode reporting is selected when pin NOOC = HIGH. Global
and individual overcurrent protection modes are selected using pins PSWn_N, following
power switching modes selection scheme; see Table 6.
For global overcurrent protection mode, only PSW1_N and OC1_N are active; that is, in
this mode, the remaining overcurrent indicator pins are disabled. To inhibit the analog
overcurrent detection, OC_N pins must be connected to VREF(5V0).
Both analog and digital overcurrent modes are supported; see Table 7.
For digital overcurrent detection, the normal digital TTL level is accepted on overcurrent
input pins. For analog overcurrent detection, the threshold is given in Section 14. In this
mode, to lter out false overcurrent conditions because of in rush and spikes, a dead time
of 15 ms is built into the IC, that is, overcurrent must persist for 15 ms before it is reported
to the host.
(1) Includes PCB traces, ferrite beads, and so on.
Fig 6.
Typical voltage drop components in self-powered mode using global overcurrent detection
5.1 V KICK-UP
POWER SUPPLY
± 3 % regulated
+
4.95 V (min)
004aaa262
low-ohmic
PMOS switch
ISP1520
power switch
(PSWn_N)
VBUS
D+
D
GND
SHIELD
4.75 V (min)
downstream
port
connector
hub board
resistance(1)
voltage drop
25 mV
voltage drop
75 mV
low-ohmic
sense resistor
for overcurrent
detection
voltage drop
100 mV
Table 5.
Power switching mode: pin conguration
Power switching mode
PSW1_N
PSW2_N
PSW3_N
PSW4_N
Ganged
internal pull-up
ground
Individual
internal pull-up
Table 6.
Overcurrent protection mode pin conguration
Power switching mode NOOC
PSW1_N
PSW2_N
PSW3_N
PSW4_N
None
HIGH
ground
Global
LOW
internal pull-up
ground
Individual
LOW
internal pull-up
internal pull-up internal
pull-up
internal
pull-up
Table 7.
Overcurrent detection mode selection pin conguration
Pin ADOC
Mode selection
Description
3.3 V or 5.0 V
analog
threshold
Vtrip
Ground
digital
normal digital TTL level
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISP1520BDGA | 功能描述:IC USB HUB CONTROLLER HS 64-LQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 专用 系列:- 标准包装:3,000 系列:- 应用:PDA，便携式音频/视频，智能电话 接口:I²C，2 线串口 电源电压:1.65 V ~ 3.6 V 封装/外壳:24-WQFN 裸露焊盘 供应商设备封装:24-QFN 裸露焊盘（4x4） 包装:带卷 (TR) 安装类型:表面贴装 产品目录页面:1015 (CN2011-ZH PDF) 其它名称:296-25223-2 |
| ISP1520BD-S | 制造商:ST-Ericsson 功能描述:Universal Serial Bus Hub Controller 64-Pin LQFP |
| ISP1520BD-T | 功能描述:USB 接口集成电路 USB2 4 PORT HUB RoHS:否 制造商:Cypress Semiconductor 产品:USB 2.0 数据速率: 接口类型:SPI 工作电源电压:3.15 V to 3.45 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:WLCSP-20 |
| ISP1520BDUM | 功能描述:IC USB HUB CONTROLLER HS 64-LQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 专用 系列:- 标准包装:3,000 系列:- 应用:PDA，便携式音频/视频，智能电话 接口:I²C，2 线串口 电源电压:1.65 V ~ 3.6 V 封装/外壳:24-WQFN 裸露焊盘 供应商设备封装:24-QFN 裸露焊盘（4x4） 包装:带卷 (TR) 安装类型:表面贴装 产品目录页面:1015 (CN2011-ZH PDF) 其它名称:296-25223-2 |
| ISP1521 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:IC USB HUB CONTROLLER HS 80-LQFP |
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