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參數(shù)資料
| 型號(hào)： | TC1270ANMVCTTR |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Voltage Supervisor with Manual Reset Input |
| 中文描述： | 電壓監(jiān)控器，帶有手動(dòng)復(fù)位輸入 |
| 文件頁(yè)數(shù)： | 22/40頁(yè) |
| 文件大?。?/td> | 384K |
| 代理商： | TC1270ANMVCTTR |
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TC1270A/70AN/71A
DS22035B-page 22
2007 Microchip Technology Inc.
4.5
Reset Generator Circuit
The output signals from the Voltage Detect Circuit and
the Manual Reset with Glitch Filter Circuit are OR’d
together and is used to activate the Reset Generator
Module.
After the reset conditions have been removed (the MR
pin is no longer forced low and the input voltage is
greater than the Trip Point voltage), the Reset Genera-
tor circuit determines the reset delay timeout required.
There are three options for the delay circuit. These are:
2.19 ms (typical) delay
35 ms (typical) delay
280 ms (typical) delay
4.5.1
RESET DELAY TIMER
The Reset delay timer ensures that the TC127XA
device will “hold” the embedded system in Reset until
the system voltage has stabilized. The Reset delay
timer time out is shown in
Table 4-4
.
The Reset Delay Timer starts once the Voltage
Detector Circuit output AND the Manual Reset with
Glitch Filter Circuit output become inactive. While the
Reset Delay Timer is active, the RST or RST pin is
driven to the active state. Once the Reset Delay Timer
times-out, the RST or RST pin is driven inactive.
The Reset delay timer (t
RST
) starts after the device
voltage rises above the “actual” trip point (V
TRIP
).
When the Reset delay timer times out, the Reset output
pin (RST/RST) is driven inactive.
The Reset Delay Timer is cleared, if either (or both) the
Voltage Detector Circuit output OR the Manual Reset
with Glitch Filter Circuit output become active. The RST
or RST pin continues to be driven to the active state.
Figure 4-12
illustrates when the Reset Delay Timer
(t
RST
) is active or inactive.
4.5.2
EFFECT OF TEMPERATURE ON
RESET POWER-UP TIMER (t
RPU
)
The Reset delay timer time out period (t
RST
)
determines how long the device remains in the Reset
condition. This time out is affected by both the device
V
DD
and temperature. Typical responses for different
V
DD
values and temperatures are shown in
Figures
2-28
,
2-29
and
2-30
.
TABLE 4-4:
RESET DELAY TIMER
TIME OUTS
FIGURE 4-12:
Waveform.
Reset Power-up Timer
t
RST
Units
Min
Typ
Max
1.09
17.5
140
↑
2.19
35
280
4.38
70
560
↑
ms
ms
ms
This is the
minimum time that
the Reset Delay
Timer will “hold”
the Reset pin
active after V
DD
rises above V
TRIP
This is the
maximum time
that the Reset
Delay Timer will
“hold” the Reset
pin active after
V
DD
rises above
V
TRIP
Note 1:
Shaded rows are custom ordered time
outs.
V
TRIP
V
DD
RST
t
RST
Reset Delay
Timer Inactive
Reset
Delay
Timer
Inactive
R
T
See
Figures 2-9
,
2-7
and
2-8
See
Figures 2-12
,
2-11
and
2-10
See
Figures 2-9
,
2-7
and
2-8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TC1270ANMVRCTR | Voltage Supervisor with Manual Reset Input |
| TC1270ANRBVCTTR | Voltage Supervisor with Manual Reset Input |
| TC1270ANRBVRCTR | Voltage Supervisor with Manual Reset Input |
| TC1270ANRCVCTTR | Voltage Supervisor with Manual Reset Input |
| TC1270ANRCVRCTR | Voltage Supervisor with Manual Reset Input |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC1270ANMVRCTR | 功能描述:監(jiān)控電路 4Pin uP Reset Mon 4.38V Reset Thresh RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TC1270ANRBVCTTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
| TC1270ANRBVRCTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
| TC1270ANRCVCTTR | 功能描述:監(jiān)控電路 Vltg Detector 2.63V Reset Threshold RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| TC1270ANRCVRCTR | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
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