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参数资料
| 型号： | DS1986-F5 |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Programmable ROM |
| 英文描述： | 64K X 1 OTPROM, MADB2 |
| 封装： | MICROCAN-2 |
| 文件页数： | 16/27页 |
| 文件大小： | 548K |
| 代理商： | DS1986-F5 |
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DS1986
23 of 27
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1986-F5# | 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1986-F5+ | 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1986U | 制造商:未知厂家 制造商全称:未知厂家 功能描述:UniqueWare iButton |
| DS1990 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Serial Number iButton |
| DS1990A | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Serial Number iButton |
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