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参数资料
| 型号： | TC1271ASBVCT |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封装： | LEAD FREE, PLASTIC, SOT-23, 5 PIN |
| 文件页数： | 15/40页 |
| 文件大小： | 551K |
| 代理商： | TC1271ASBVCT |
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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 (tRST) starts after the device
voltage rises above the “actual” trip point (VTRIP).
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
(tRST) is active or inactive.
4.5.2
EFFECT OF TEMPERATURE ON
RESET POWER-UP TIMER (tRPU)
The Reset delay timer time out period (tRST)
determines how long the device remains in the Reset
condition. This time out is affected by both the device
VDD and temperature. Typical responses for different
VDD values and temperatures are shown in
TABLE 4-4:
RESET DELAY TIMER
TIME OUTS
FIGURE 4-12:
Reset Power-up Timer
Waveform.
tRST
Units
Min
Typ
Max
1.09
2.19
4.38
ms
17.5
35
70
ms
140
280
560
ms
↑↑
This is the
minimum time that
the Reset Delay
Timer will “hold”
the Reset pin
active after VDD
rises above VTRIP
This is the
maximum time
that the Reset
Delay Timer will
“hold” the Reset
pin active after
VDD rises above
VTRIP
Note 1:
Shaded rows are custom ordered time
outs.
VTRIP
VDD
RST
tRST
Reset Delay
Timer Inactive
Reset
Delay
Timer
Inactive
Reset
D
e
lay
T
imer
Active
See Figures 2-9,
See Figures 2-9,
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC1271ASBVCTTR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
| TC1271ASBVRCTR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
| TC1271ASCVCTTR | 功能描述:监控电路 Vltg Detector 2.93V Reset Threshold RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| TC1271ASCVRCTR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Voltage Supervisor with Manual Reset Input |
| TC1271ASVCTTR | 功能描述:监控电路 5Pin uP Reset Mon 2.93V Reset Thresh RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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