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参数资料
| 型号： | DS2703U+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/20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
SHA-1 related commands used while authenticating a battery or peripheral device are summarized in Table 3 for
convenience. Four additional commands for clearing, computing and locking of the Secret are described in detail in
the following section.
Table 3. Authentication Function Commands
COMMAND
Write Challenge
Compute MAC without ROM ID
and return MAC
Compute MAC with ROM ID and
return MAC
HEX
0C
36
35
FUNCTION
Writes 64-bit challenge for SHA-1 processing. Required prior to
either Compute MAC command.
Computes hash with logical 1’s in place of the ROM_ID
Computes hash including the ROM_ID
SECRET MANAGEMENT FUNCTION COMMANDS
LOAD SECRET [5Ah]. This command changes the 64-bit secret to the provided 64-bit data argument value. The
host must apply a programming pulse afterwards to copy the new secret value to EEPROM.
COMPUTE NEXT SECRET WITHOUT ROM ID [30h]. This command initiates a SHA-1 computation of the MAC
and uses a portion of the resulting MAC as the next or new secret. The MAC computation is performed with the
current 64-bit secret and the 64-bit challenge. The space in the message reserved for the ROM ID is filled with
logical 1's. Two words (64 bits) of the output MAC are used as the new secret value. The host must allow t COMP
after issuing this command for the SHA calculation to complete, then apply a programming pulse to write the new
secret value to EEPROM.
COMPUTE NEXT SECRET WITH ROM ID [33h]. This command initiates a SHA-1 computation of the MAC and
uses a portion of the resulting MAC as the next or new secret. The MAC computation is performed with the current
64-bit secret, the 64-bit ROM ID, and the 64-bit challenge. Two words (64 bits) of the output MAC are used as the
new secret value. The host must allow t COMP after issuing this command for the SHA calculation to complete, then
apply a programming pulse to write the new secret value to EEPROM.
Note : Please contact the factory for details about what information is used to construct the new secret in the
Compute Next Secret With ROM ID and Compute Next Secret Without ROM ID commands.
LOCK SECRET [6Ah]. This command write protects the 64-bit Secret to prevent accidental or malicious overwrite
of the secret value. The Secret value stored in EEPROM becomes "final." The host must apply a programming
pulse to write the secret lock bit to EEPROM.
Table 4. Secret Loading Function Commands
COMMAND
Load Secret
Compute Next Secret without
ROM ID
Compute Next Secret with
ROM ID
Lock Secret
HEX
5A
30
33
6A
FUNCTION
Loads the Secret with 64-bit data argument
Generates new global secret
Generates new unique secret
Sets lock bit to prevent changes to the Secret
1-Wire SPEED CONTROL FUNCTION COMMANDS
CLEAR OVERDRIVE [8Dh]. This command clears the 1-Wire Overdrive bit to select the Standard 1-Wire timings
shown in the Electrical Characteristics table. The Overdrive bit is stored in EEPROM so that the programmed
speed selection can be recalled on initial power up. The host must apply a programming pulse to complete the
command.
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相关代理商/技术参数 |
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| 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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