DS28DS28E01-100 データシートの表示（PDF） - Maxim Integrated

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DS28DS28E01-100

1Kb Protected 1-Wire EEPROM with SHA-1 Engine

Maxim Integrated 

ABRIDGED DATA SHEET

DS28E01-100

1Kb Protected 1-Wire EEPROM

with SHA-1 Engine

ELECTRICAL CHARACTERISTICS (continued)

(TA = -40°C to +85°C.) (Note 1)

Note 17: ε in Figure 12 represents the time required for the pullup circuitry to pull the voltage on IO up from VIL to VTH. The actual

maximum duration for the master to pull the line low is tW1LMAX + tF - ε and tW0LMAX + tF - ε, respectively.

Note 18: δ in Figure 12 represents the time required for the pullup circuitry to pull the voltage on IO up from VIL to the input-high

threshold of the bus master. The actual maximum duration for the master to pull the line low is tRLMAX + tF.

Note 19: Current drawn from IO during the EEPROM programming interval or SHA-1 computation.

Note 20: Refer to the full data sheet for this note.

Note 21: Write-cycle endurance is degraded as TA increases.

Note 22: Not 100% production tested; guaranteed by reliability monitor sampling.

Note 23: Data retention is degraded as TA increases.

Note 24: Guaranteed by 100% production test at elevated temperature for a shorter time; equivalence of this production test to the

data sheet limit at operating temperature range is established by reliability testing.

Note 25: EEPROM writes can become nonfunctional after the data-retention time is exceeded. Long-term storage at elevated tem-

peratures is not recommended; the device can lose its write capability after 10 years at +125°C or 40 years at +85°C.

Note 26: Refer to the full data sheet for this note.

COMPARISON TABLE

LEGACY VALUES

DS28E01-100 VALUES

PARAMETER

STANDARD SPEED

(μs)

OVERDRIVE SPEED

(μs)

STANDARD SPEED

(μs)

OVERDRIVE SPEED

(μs)

tSLOT (including tREC)

tRSTL

tPDH

tPDL

tW0L

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

61

(undefined)

7

(undefined)

65*

(undefined)

11*

(undefined)

480

(undefined)

48

80

480

640

48

80

15

60

2

6

15

60

2

6

60

240

8

24

60

240

8

24

60

120

6

16

60

120

6

15.5

*Intentional change; longer recovery time requirement due to modified 1-Wire front-end.

Note: Numbers in bold are not in compliance with legacy 1-Wire product standards.

4

Maxim Integrated

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