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参数资料
| 型号： | DS2703G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC BATT AUTHENTICAT SHA-1 8-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 10,000 |
| 功能： | 电池验证 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TDFN |
| 供应商设备封装： | 8-TDFN-EP（2x3） |
| 包装： | 带卷 (TR) |
DS2703 SHA-1 Battery Pack Authentication IC
Figure 4. 1-Wire CRC Generation Block Diagram
INPUT
MSb
XOR
XOR
LSb
XOR
HARDWARE CONFIGURATION
The DS2703 uses an open-drain output driver as part of the bidirectional interface circuitry shown in Figure 5. If a
bidirectional pin is not available on the bus master, separate output and input pins can be connected together. For
normal communication the 1-Wire bus must have a pullup resistor at the bus-master end of the bus. For short line
lengths and/or V PULLUP ≥ 3.0V, a value of approximately 4.7k Ω is recommended. For long line lengths and/or
V PULLUP < 3.0V, a value of approximately 2k Ω is recommended. The idle state for the 1-Wire bus is high. If, for any
reason, a bus transaction must be suspended, the bus must be left in the idle state to properly resume the
transaction later. Note that if the bus is left low for more than t LOW0 , slave devices on the bus begin to interpret the
low period as a reset pulse, effectively terminating the transaction.
When performing SHA-1 computations with a low pullup voltage, the DS2703 may require a stronger pullup than
4.7k to maintain the minimum V PULLUP requirement. A P-FET in parallel with the standard pullup can be switched on
during computation and then disabled to read the result. When measuring the thermistor R THM , both the strong
pullup and standard pullup should be disabled to allow a weak pullup to form a voltage divider with the thermistor.
A voltage A/D connected directly to the 1-Wire bus can then read the voltage drop of the thermistor.
Figure 5. 1-Wire Bus Interface Circuitry
V PULLUP
COMP
COMM
4.7K
50K
DQ
150
Rx
Voltage A/D
R THM
~1μA
~100 ?
MOSFET
Tx
Rx
Tx
Bus Master
PACK-
11 of 20
DS2703
Activate
THM
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2703K | 功能描述:电池管理 RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2703U | 制造商:Maxim Integrated Products 功能描述:BATT PACK ID W/SHA-1 8PIN USOP - Rail/Tube |
| DS2703U/T&R | 制造商:Maxim Integrated Products 功能描述:BATT PACK ID W/SHA-1 8PIN USOP T&R - Tape and Reel |
| DS2703U+ | 功能描述:电池管理 SHA-1 Battery Pack Authentication RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2703U+R | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:SHA-1 Battery Pack Authentication IC |
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