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參數(shù)資料
| 型號： | DS1986-F5 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Programmable ROM |
| 英文描述： | 64K X 1 OTPROM, MADB2 |
| 封裝： | MICROCAN-2 |
| 文件頁數(shù)： | 16/27頁 |
| 文件大?。?/td> | 548K |
| 代理商： | DS1986-F5 |
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DS1986
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READ/WRITE TIMING DIAGRAM Figure 10 (cont.)
Read-data Time Slot
Regular Speed
Overdrive Speed
60
s ≤ tSLOT < 120 s6 s ≤ tSLOT < 16 s
1
s ≤ tLOWR < 15 s1 s ≤ tLOWR < 2 s
0
≤ tRELEASE < 45 s0 ≤ tRELEASE < 4 s
1
s ≤ tREC < ∞
1
s ≤ tREC < ∞
tRDV = 15
stRDV = 2 s
tSU < 1
stSU < 1 s
PROGRAM PULSE TIMING DIAGRAM Figure 11
CRC GENERATION
With the DS1986 there are two different types of CRCs (Cyclic Redundancy Checks). One CRC is a 8-bit
type and is stored in the most significant byte of the 64-bit ROM. The bus master can compute a CRC
value from the first 56 bits of the 64-bit ROM and compare it to the value stored within the DS1986 to
determine if the ROM data has been received error-free by the bus master. The equivalent polynomial
function of this CRC is: X8 + X5 + X4 + 1. This 8-bit CRC is received in the true (non-inverted) form when
reading the ROM of the DS1986. It is computed once at the factory and lasered into the ROM.
RESISTOR
MASTER
DS1986
tDP
tPP
tDP
LINE TYPE LEGEND:
Bus master active high
(12V @ 10 mA)
Resistor pull-up
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1986-F5# | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1986-F5+ | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1986U | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UniqueWare iButton |
| DS1990 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Serial Number iButton |
| DS1990A | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Serial Number iButton |
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