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參數(shù)資料
| 型號： | DS2480 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Serial 1-Wire Line Driver(1線串行線驅(qū)動器) |
| 中文描述： | 串行、1-Wire線驅(qū)動器 |
| 文件頁數(shù)： | 15/26頁 |
| 文件大?。?/td> | 191K |
| 代理商： | DS2480 |
DS2480
042498 15/26
PULSE WAVE FORMS, DISARMED
The pulse command can be used to generate a strong
pull–up to 5V and a 12V programming pulse, respec-
tively. The duration of the pulse is predefined if the
parameter value code of parameter 010 (Programming
Pulse Duration) and parameter 011 (Strong Pull–Up
Duration), has a value from 000 to 110 (see Table 4).
Figures 7a and 7b show the timing of a pulse with prede-
fined duration, which should be considered the normal
case. If an infinite duration is chosen (parameter value
code 111), the host must terminate the pulse command,
as shown in Figures 7c and 7d. All versions of Figure 7
assume that bit 1 of the pulse command is 0, i.e., dis-
armed mode. See section Communication Commands,
Pulse, for more details on possibilities of the pulse
command.
STRONG PULL–UP TO 5V, PREDEFINED DURATION
Figure 7a
END OF PREVIOUS
TIME SLOT
5V
0V
BEGIN OF NEXT
TIME SLOT
t
SPU
t
1
t
2
t
3
t
4
IDLE
TIME
IDLE
TIME
The processing of a pulse command is essentially the
same, regardless if a strong pull–up or a programming
pulse is requested. At t
1
the host starts sending the
pulse command byte. At t
2
the DS2480 has received the
command and immediately generates the pulse. The
pulse ends at t
3
and the DS2480 sends out the com-
mand response byte to inform the host that the com-
mand is completed. The idle time between t
1
and t
2
is
determined by the time to transmit the command byte at
the selected baud rate. The idle time between t
3
and t
4
is
comprised of the time to transmit the response byte,
plus the response time of the host plus the time to trans-
mit the command and/or data to generate the next time
slot.
12V PROGRAMMING PULSE, PREDEFINED DURATION
Figure 7b
t
1
t
3
t
4
t
2
t
PP
5V
END OF PREVIOUS
TIME SLOT
BEGIN OF NEXT
TIME SLOT
12V
0V
STEEP SLOPES
IDLE
TIME
IDLE
TIME
A correct programming pulse can only be generated if
the 12V programming voltage is available at the Vpp pin
of the DS2480. The slew rate of the rising and falling
edge of the programming pulse (“steep slopes”) is not
actively controlled by DS2480.
For EPROM programming, only a single slave device
should be connected to the 1–Wire bus and the cable
must to be short, not to exceed a few meters. One
should not attempt generating a programming pulse
with a non–EPROM device on the bus; this may dam-
age the device as well as the DS2480.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS2480B | 功能描述:緩沖器和線路驅(qū)動器 RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| DS2480B | 制造商:Maxim Integrated Products 功能描述:IC SERIAL LINE DRIVER 2480 SOIC8 |
| DS2480B/T&R | 功能描述:緩沖器和線路驅(qū)動器 RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| DS2480B+ | 功能描述:緩沖器和線路驅(qū)動器 Serial - 1-Wire Line Driver RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| DS2480B+R | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Serial to 1-Wire Line Driver |
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