参数资料
| 型号： | DS2705U+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/18页 |
| 文件大小： | 0K |
| 描述： | IC AUTHENTICATE SHA-1 8-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 功能： | 电池验证 |
| 电池化学： | 所有电池类型 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°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： | 管件 |
DS2705: SHA-1 Authentication Master
AC ELECTRICAL CHARACTERISTICS
(2.5V ≤ V DD ≤ 5.5V, T A = -20°C to +85°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Programming Pulse Width
t PPW
17
ms
Programming Pulse Rise Time
Programming Pulse Fall Time
Strong Pullup Delay Time
t PPR
t PPF
t SPUD
(Note 8)
(Note 8)
0.5
0.5
2
5
5
10
μ s
μ s
μ s
Strong Pullup Period
Challenge Delay Time
t SPUP
t CHD
30.25
45
34.00
65
48.00
85
ms
ms
Authentication Attempt Time
t AAT
(Note 9)
61
490
ms
FAIL Pin Pulse Frequency
t FPF
FOM = 1, 50% duty cycle
1.5
2
2.5
Hz
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
All voltages are referenced to V SS .
IDD3 Sleep mode conditions:
CHAL pin inactive OR (CHAL active AND (PAA = 0 AND PPT = 00 AND FOM = 0 AND Initial Authentication sequence
complete))
[Above conditions disable the internal oscillator]
Programming temperature range is T A = 0 ° C to 50 ° C.
5 years data retention at 70 ° C
If CHAL pin left unconnected, CHP bit = 0 required for an authentication attempt to be initiated on power up. See Table 1.
Typical Communication mode MDQ pullup behavior equivalent to 3k Ω resistor.
Typical Computation mode MDQ pullup behavior approximates a 50 Ω resistor.
Exceeding maximum rise and fall time specifications may affect device reliability.
t AAT = Retries per Attempt x (264bits x 90 μ s + 3 x ( t MRSTL + t RSTH ) + t SPUD ) = [1 to 8] x (23.7ms + 3.54ms + 34ms)
MAX[7 retries]: 490ms, MIN[no retries]: 61ms with standard timings
Note 10:
1.
2.
3.
4.
1-Wire Master timings based on ±25% clock tolerance from nominal.
t RPDT [defined in design documentation] = t MRSTL + t MRSTH
t MPDL-MAX = t MRSTH-MIN – t MPDH-MAX, represents the maximum presence pulse low time allowed from the slave.
Bus rise time of ~1 μ s required to settle to logic high by t MRDV after MDQ released at t MLOW1
PIN DESCRIPTION
μ MAX
1
2
3
4
5
6
PIN
TDFN
1
2
3
4
5
6
SYMBOL
CHAL
PASS
FAIL
V SS
V PP
SDQ
FUNCTION
Challenge Strobe Input Pin. Initiates authentication. Active level/edge set by CHP bit.
Authentication “PASS” Result Open-Drain Output Pin
Authentication “FAIL” Result Open-Drain Output Pin (Programmable As Low Or Pulse)
Supply Return Pin, GND Reference for Logic Signals
EEPROM Programming Voltage Input
Slave Serial interface Data I/O Pin. Bidirectional data transmit and receive at 16kbps or
143kbps. Bus master must provide a weak pullup.
Master Serial interface Data I/O Pin. Bidirectional data transmit and receive at 16kbps or
7
7
MDQ
143kbps. Provides a weak pullup in communication mode and strong pullup in
computation mode.
8
8
V DD
Supply Input Pin. Bypass to V SS with 0.1 μ F capacitor.
5 of 18
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2705U+ | 功能描述:电池管理 SHA-1 Authent Master 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 |
| DS2705U+/T&R | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:SHA-1 Authentication Master |
| DS2705U+/TR | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:SHA-1 Authentication Master |
| DS2705U+T&R | 制造商:Maxim Integrated Products 功能描述:SHA-1 AUTHENTICATION MASTER 8PIN UMAX - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC AUTHENTICATE SHA-1 8-UMAX |
| DS2705U+T&R | 功能描述:电池管理 SHA-1 Authent Master 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 |
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