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参数资料
| 型号： | DS2490 |
| 英文描述： | USB to 1-Wire Bridge Chip |
| 中文描述： | USB与1-Wire桥接芯片 |
| 文件页数： | 35/50页 |
| 文件大小： | 530K |
| 代理商： | DS2490 |
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DS2490
35 of 50
033199
PARAMETER
@ 50 mA load on 1-Wire
Programming Voltage Drop
@ 10 mA load on 1-Wire
Power On Reset Trip Point
VPP Sensor Trip Point
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
V
PROG
0.24
V
3
V
POR
V
PPTRIP
3.3
V
V
9.08
NOTES:
1.
Applies only if 12.0V VPP supply is connected. If VPP and VD are tied together, current is less than
1
μ
A.
2.
Voltage difference between VD and 1-WIRE.
3.
Voltage difference between VPP and 1-WIRE.
4.
The sum of ID and IB will not exceed 50 mA.
AC CHARACTERISTICS CONDITIONS:
TA: 0
o
C - 70
o
C
VD: 4.4V - 5.5V, VB: 3.0V - 3.6V
PARAMETER
USB I/F
1-Wire I/F
SPECIFICATION
As defined in Chapter 7 of the USB Specification
See the section “1-WIRE INTERFACE CONTROLLER” of this
document
CAPACITANCE
CONDITIONS:
PARAMETER
Input Capacitance
Output Capacitance
Input/Output Capacitance
TA:25
o
C
UNITS
pF
pF
pF
SYMBOL
CIN
COUT
CIO
MIN
TYP
MAX
15
15
15
NOTES
HW/SW APPLICATION RECOMMENDATIONS
A schematic example of a USB to 1-Wire Adapter peripheral is shown in Figure 13.
Software application recommendations – TBA.
When using the DS2490 to communicate with the Crypto-1-Wire or devices which require large data
transfers, it is suggested that the FIFO for Endpoint 2 (128 bytes) be filled with data before starting the
Communication command which will be responsible for the transmission to the 1-Wire bus. Once the
command is started and if more data than the initial 128 bytes is to be sent, the Endpoint 2 FIFO status
must be monitored via EP1 state registers. Additional data must not be sent until there is less than 64
bytes remaining in the Endpoint 2 FIFO. Operating in this fashion will keep the 1-Wire bus from
becoming idle during large data transfers to the 1-Wire device as well as minimizing the USB bandwidth
consumed by the DS2490.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2490S | USB to 1-Wire Bridge Chip |
| DS2502-E64 | IEEE EUI-64 Node Address Chip |
| DS26334 | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
| DS26334G | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
| DS26334GN | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2490S | 功能描述:接口 - 专用 RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS2490S+ | 制造商:Maxim Integrated Products 功能描述:USB TO 1-WIRE BRIDGE 24SOIC W - Rail/Tube 制造商:Maxim Integrated Products 功能描述:USB 1-W BRIDGE CHIP 24-SO LF 制造商:Maxim Integrated Products 功能描述:Bulk |
| DS2490S+T&R | 制造商:Maxim Integrated Products 功能描述:USB TO 1-WIRE BRIDGE 24SOIC W - Tape and Reel |
| DS2490S+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:USB to 1-Wire Bridge Chip |
| DS2490X | 制造商:未知厂家 制造商全称:未知厂家 功能描述:USB to 1-Wire Bridge Chip(468.41 k) |
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