DS2703 데이터 시트보기 (PDF) - Dallas Semiconductor -> Maxim Integrated
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DS2703 Datasheet PDF : 20 Pages
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DS2703 SHA-1 Battery Pack Authentication IC
AC ELECTRICAL CHARACTERISTICS
(VPULLUP = 2.7V to 5.5V, TA = -20°C to +70°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
THM Low Delay
tTD
(Note 11)
Computation Delay Time
tD
(Note 12)
100
Computation Time
tSHA
(Note 12)
Programming Pulse Width
tPPW
(Note 5)
17
Programming Pulse Rise Time
tPPR
0.5
Programming Pulse Fall Time
tPPF
0.5
Start-up Delay Time
tSTRT
(Note 13)
AC ELECTRICAL CHARACTERISTICS: 1-Wire INTERFACE
(VPULLUP = 2.7V to 5.5V, TA = -20°C to +70°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
1-Wire INTERFACE REGULAR TIMING
Time Slot
tSLOT
60
Recovery Time
tREC
1
Write 0 Low Time
tLOW0
60
Write 1 Low Time
tLOW1
1
Read Data Valid Time
tRDV
Reset Time High
tRSTH
480
Reset Time Low
tRSTL
480
Presence Detect High
tPDH
15
Presence Detect Low
tPDL
60
1-Wire INTERFACE OVERDRIVE TIMING
Time Slot
tSLOT
6
Recovery Time
tREC
1
Write 0 Low Time
tLOW0
6
Write 1 Low Time
tLOW1
1
Read Data Valid Time
tRDV
Reset Time High
tRSTH
48
Reset Time Low
tRSTL
48
Presence Detect High
tPDH
2
Presence Detect Low
tPDL
8
TYP
MAX UNITS
15
ms
µs
15
ms
ms
5
µs
5
µs
100
ms
TYP
MAX UNITS
120
µs
µs
120
µs
15
µs
15
µs
µs
960
µs
60
µs
240
µs
16
µs
µs
16
µs
2
µs
2
µs
µs
80
µs
6
µs
24
µs
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Note 10:
Note 11:
Note 12:
Note 13:
VDQ – VTHM. The THM pin must not be driven to a higher voltage than the DQ pin.
The application thermistor cannot exceed the RDQ-THM resistance range over operating temperature. If thermistor mode is not used in the application, it is
recommended that a 50KΩ resistor be connected between DQ and THM pins instead.
Maximum leakage of DQ pin while in thermistor mode.
When performing a Lock Secret (0x6A), Set Overdrive (0x8B) or Clear Overdrive (0x8D) operation, there will be an increased operating current of IPGM-
IDLE during the time period from when the command is issued until the next 1-Wire bus reset. IPGM-IDLE current will be present before and after the program
pulse.
See Figure 11 for definitionof tPPR, tPPW, and tPPF.
All voltages referenced to VSS.
VDQ must be at least 3.0V when the 1-Wire bus is idle.
Drive strength at time=0 after Activate Thermistor command is sent to the DS2703.
Does not include capacitance referred from VB pin on initial power up.
EEPROM data read retention is four years at +50°C
Time from msb of Activate Thermistor command until THM pin is driven low internally.
Time from msb of Compute Next Secret or Compute MAC command.
Time after initial power up before the DS2703 will respond to communication. TSTRT specifications are valid only if the capacitor on VB (CVB) is 0.22µF.
Worst case 100ms delay based on maximum thermistor value of 500kΩ.
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