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参数资料
| 型号： | DS2703U+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC BATT AUTHENTICATE SHA-1 8UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 3,000 |
| 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-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 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 |
|---|---|
| DS2704 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1280-Bit EEPROM with SHA-1 Authentication |
| DS2704-500-WAFER | 功能描述:电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| DS2704E+ | 制造商:Maxim Integrated Products 功能描述:1024 BIT MEM W/SHA-1 AUTH L/F - Rail/Tube |
| DS2704G+ | 功能描述:电可擦除可编程只读存储器 1280-Bit 电可擦除可编程只读存储器 w/SHA-1 Authent RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| DS2704G+T&R | 制造商:Maxim Integrated Products 功能描述:EEPROM SERL-1WIRE 1.25KBIT 5PAGES X 32 3.3V/5V 6TDFN EP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC EEPROM 1.25KBIT 6TDFN 制造商:Maxim Integrated Products 功能描述:EEPROM 1280-Bit EEPROM w/SHA-1 Authent |
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