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參數(shù)資料
| 型號(hào)： | DS1991L-F5 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Memory IC:Other |
| 英文描述： | SPECIALTY MEMORY CIRCUIT, MEDB2 |
| 封裝： | MICROCAN-2 |
| 文件頁數(shù)： | 3/14頁 |
| 文件大小： | 281K |
| 代理商： | DS1991L-F5 |
DS1991
11 of 14
INITIALIZATION PROCEDURE “RESET AND PRESENCE PULSES” Figure 10
480
s ≤ t
RSTL <
∞ *
480
s ≤ t
RSTH <
∞(includes recovery time)
15
s ≤ t
PDH < 60
s
60
s ≤ t
PDL < 240
s
In order not to mask interrupt signaling by other devices on the 1-Wire bus, t
RSTL + tR should always
be less than 960
s.
READ/WRITE TIME SLOTS
The definitions of write and read time slots are illustrated in Figure 11. All time slots are initiated by the
master driving the data line low. The falling edge of the data line synchronizes the DS1991 to the master
by triggering a delay circuit in the DS1991. During write time slots, the delay circuit determines when the
DS1991 will sample the data line. For a read data time slot, if a “0” is to be transmitted, the delay circuit
determines how long the DS1991 will hold the data line low overriding the 1 generated by the master. If
the data bit is a “1”, the iButton will leave the read data time slot unchanged.
READ/WRITE TIMING DIAGRAM Figure 11
Write-One Time Slot
60
s ≤ t
SLOT < 120
s
1
s ≤ t
LOW1 < 15
s
1
s ≤ t
REC <
∞
RESISTOR
MASTER
RESISTOR
MASTER
DS1991
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1991L-F5/A1A | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)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 |
| DS1991L-F5+ | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)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 |
| DS1991L-F5+A1A | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)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 |
| DS1991L-F5W | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)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 |
| DS1991LP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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