參數(shù)資料
型號: ISD-300A1
英文描述: Universal Serial Bus
中文描述: 通用串行總線
文件頁數(shù): 51/67頁
文件大?。?/td> 580K
代理商: ISD-300A1
ISD-300A1
46
October 19, 2001
ATA Interface Termination
Design practices as outlined in the
ATA/ATAPI-5 Specification
for signal integrity should be followed with
systems that utilize a ribbon cable interconnect between the ISD-300A1 ATA interface and the device,
especially if Ultra Mode DMA is utilized.
3.3V Power Regulation
In systems where the ATA/ATAPI device remains powered during ISD-300A1 low power operation (such
as USB suspend state), the system design must insure the ISD-300A1 3.3V supply is not “back powered”
through IO cell leakage current from the device’s 5V ATA interface, raising the supply rail above safe
operating limits. Typically this may be accomplished by utilizing a 1.5K ohm resistive current sink
between the 3.3V supply and ground.
VBUS Powered System Considerations
GPIO Internal Pull Down Resistors
All ISD-300A1 GPIO IO cells incorporate an internal pull down resistor (50K ohm typical). The system
must insure the GPIO interface is at logic ‘0’ to eliminate current draw during the USB suspend state.
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the device is not implied at these or any other
conditions in excess of those given in the operations sections of this data sheet. Exposure to absolute
maximum ratings for extended periods can adversely affect device reliability.
Symbol
Parameter
VDD
3.3 V IO Supply
Vin
Input Pin Voltage
Ta
Ambient Operating Temperature Range
Tstrg
Storage Temperature
Min
-0.5
-0.5
-40
°
-65
Max
4.0
5.5
85
°
150
Units
Volts
Volts
Celsius
Celsius
Table 24 – Absolute Maximum Ratings
相關PDF資料
PDF描述
ISD-SR3000
ISD1100SERIES ISD1110/ISD1112 Part2
ISD1200SERIES ISD1210/ISD1212 Part3
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ISD1400_2
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