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参数资料
| 型号： | DS2775G+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 33/46页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE LI+ 2CELL 14-TDFN |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4 V ~ 9.2 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x5） |
| 包装： | 管件 |
| 产品目录页面： | 1436 (CN2011-ZH PDF) |
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2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
Table 9. Memory Map (continued)
ADDRESS (HEX)
13h
14h
15h
16h
17h
18h
19h
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
20h to 2Fh
30h to 5Fh
60h to 80h
81h to AFh
B0h
B1h
B2h to FDh
FEh
DESCRIPTION
Accumulated Current Register LSB - 2
Age Scalar Register
Special Feature Register
Full Register MSB
Full Register LSB
Active-Empty Register MSB
Active-Empty Register LSB
Standby-Empty Register MSB
Standby-Empty Register LSB
Voltage Register MSB, V IN2 - V IN1
Voltage Register LSB, V IN2 - V IN1
Cycle Counter Register
EEPROM Register
User EEPROM Register, Lockable, Block 0
Reserved
Parameter EEPROM Register, Lockable, Block 1
Reserved
Factory Gain RSGAIN Register MSB
Factory Gain RSGAIN Register LSB
Reserved
2-Wire Command Register
READ/WRITE
R
R/W*
R/W
R
R
R
R
R
R
R
R
R/W*
R/W
R/W
—
R/W
—
R
R
—
W
FFh Reserved —
*Register value is automatically saved to EEPROM during active-mode operation and recalled from EEPROM on power-up.
64-Bit Net Address (ROM ID)
Each DS2775 –DS2778 has a unique, factory-pro-
grammed ROM ID that is 64 bits. The first 8 bits of the
net address are the product family code (3Dh). The
next 48 bits are a unique serial number. The last 8 bits
are a cyclic redundancy check (CRC) of the first 56 bits
(see Figure 22).
Authentication
The DS2776/DS2778 have an authentication feature
that is performed using a FIPS 180-compliant SHA-1
one-way hash algorithm on a 512-bit message block.
The message block consists of a 64-bit secret, a 64-bit
challenge, and 384 bits of constant data. Optionally,
the 64-bit net address replaces 64 of the 384 bits of
constant data used in the hash operation. Contact
Maxim for details of the message block organization.
The host and the DS2776/DS2778 both calculate the
result based on the mutually known secret. The result
data, known as the message authentication code
(MAC) or message digest, is returned by the
DS2776/DS2778 for comparison to the host’s result.
Note that the secret is never transmitted on the bus and
thus cannot be captured by observing bus traffic. Each
authentication attempt is initiated by the host system by
providing a 64-bit random challenge through the Write
8-BIT CRC
MSb
Figure 22. 1-Wire Net Address Format (ROM ID)
48-BIT SERIAL NUMBER
8-BIT FAMILY
CODE (3Dh)
LSb
______________________________________________________________________________________
33
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2775G+ | 功能描述:电池管理 2-Cell Stand-Alone Li+ Fuel-Gauge 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 |
| DS2775G+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:2S FG PROT 1W 14L 3X5 TDFN T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC FUEL GAUGE LI+ 2CELL 14-TDFN 制造商:Maxim Integrated Products 功能描述:Battery Management 2-Cell Stand-Alone Li+ Fuel-Gauge |
| DS2775G+T&R | 功能描述:电池管理 2-Cell Stand-Alone Li+ Fuel-Gauge 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 |
| DS2775G+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication |
| DS2775GR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication |
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