- 您现在的位置：买卖IC网 > PDF目录13951 > MIC2786-XAYMT TR (Micrel Inc)IC DUAL PUSH BUTTON RESET 8MLF PDF资料下载
参数资料
| 型号： | MIC2786-XAYMT TR |
| 厂商： | Micrel Inc |
| 文件页数： | 10/17页 |
| 文件大小： | 0K |
| 描述： | IC DUAL PUSH BUTTON RESET 8MLF |
| 特色产品： | MIC2786 and MIC2787 Pushbutton Reset IC |
| 标准包装： | 1 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 4.625V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-UFDFN 裸露焊盘，8-TMLF? |
| 供应商设备封装： | 8-TMLF?（2x2） |
| 包装： | 标准包装 |
| 其它名称： | 576-4005-6 |
Micrel, Inc.
Application Information
Design and Product Advantages
The MIC2786/MIC2787 are voltage supervisor reset ICs
with dual manual reset inputs and long manual reset
setup delay times. The dual manual reset inputs and
long manual reset setup delay times help protect against
accidental system resets in applications such as smart
phones, personal navigation devices, MP3 players, and
set-top boxes (STB).
The MIC2786/MIC2787 assert and hold a reset when the
supply voltage decreases below the factory-programmed
threshold voltage. Reset is asserted for a fixed reset
timeout delay once the supply voltage increases above
the rising threshold voltage or when both manual reset
inputs are asserted low for longer than the setup delay
time.
The MIC2786/MIC2787 feature manual reset setup
delay times of 2s, 4s or 6s, which are selected by the tri-
state programmable delay input pin (PDY). They are
available with factory-programmed reset timeout delays
of 140ms (min.) or 240ms (min.). Both the MIC2786 and
MIC2787 feature an active-low, open-drain reset output
(/RST) and an active-high, push-pull reset output
(RSTP). This allows flexibility for interfacing with different
microprocessors, PMICs, and load-switches. The
MIC2786 features 65k Ω pull-up resistors on the /MR0
and /MR1 inputs to provide ease when connecting to
push-button inputs. The MIC2787 does not provide pull-
up resistors on the manual reset inputs and is intended
for directly interfacing to logic outputs.
Supply Bypass Capacitor
A 0.1μF input bypass capacitor must be placed from V IN
(Pin 8) to GND (Pin 2).
Programmable Delay Input (PDY)
The MIC2786/MIC2787 has a programmable setup
delay time, t SETUP that is set via a tri-state logic
configuration. The PDY pin is intended to be connected
to the V IN supply voltage, ground or left floating.
MIC2786/MIC2787
Dual Manual Reset Inputs (/MR0, /MR1)
The /MR0, /MR1 input pins have integrated pull-up
resistors for the MIC2786 but require external pull-up
resistors for the MIC2787. A recommended value is
100k ? to keep the current consumption low when the
push-button switches are pressed. The behavior of the
reset outputs is independent of the order in which the
/MR0, /MR1 inputs are driven low. If both inputs are low
for a setup delay time, only one reset pulse, of width
t RESET , is generated. Keeping both inputs low for a
longer time does not generate additional reset output
pulses.
Reset Outputs (/RST and RSTP)
The /RST output is a simple open-drain N-channel
MOSFET structure that requires a pull-up resistor to an
external voltage. For most applications, the pull-up
voltage will be the same as the power supply that
supplies V IN to the MIC2786/MIC2787. As shown in
Figure 1, it is possible to tie this resistor to some other
voltage, other than V IN , thus enabling level-shifting of the
/RST output. The pull-up voltage must be limited to 5.5V
or less to avoid damage to the MIC2786/MIC2787. The
pull-up resistor must be small enough to supply current
to the inputs and leakage paths that are driven by the
/RST output (a recommended value is 100k ? ). Leave
floating if the /RST pin is unused.
Since the /RST output is open-drain, several reset
sources can be wire-ORed, in parallel, to allow resets
from multiple sources. By tying the pull-up resistor to
some other voltage, the MIC2786/MIC2787 can monitor
one voltage while level-shifting the /RST output to some
other voltage.
The RSTP pin is a push-pull output that is driven to V IN .
It cannot be level-shifted to another voltage. It is an
inverted signal of /RST.
PDY Configuration
OPEN
GND
V IN
t SETUP
2s
4s
6s
Figure 1. MIC2786/MIC2787 Used in Multiple Supply
System
October 2011
10
M9999-102711-A
相关PDF资料 |
PDF描述 |
|---|---|
| 39U801C | INDUCTOR 0.80UH 18.0A SMD |
| RCM44DRUN | CONN EDGECARD 88POS DIP .156 SLD |
| RCM44DRUH | CONN EDGECARD 88POS DIP .156 SLD |
| HSM10DRKF-S13 | CONN EDGECARD 20POS .156 EXTEND |
| RMM18DRKI | CONN EDGECARD 36POS DIP .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2787-XDYMT TR | 功能描述:监控电路 Dual Push-Button Rest IC w/ Voltage Monitor 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 |
| MIC2787-XDYMTTR | 制造商:Micrel Inc 功能描述:Push-Button Reset 2.925V Supervisor MLF8 |
| MIC2787-XDYMT-TR | 功能描述:Supervisor Open Drain, Push-Pull 1 Channel 8-TMLF? (2x2) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 类型:简单复位/加电复位 受监控电压数:1 输出:开路漏极，推挽式 复位:高有效/低有效 复位超时:最小为 140 ms 电压 - 阈值:2.925V 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:8-UFDFN 裸露焊盘，8-TMLF? 供应商器件封装:8-TMLF?（2x2） 标准包装:1 |
| MIC2788-XYMT TR | 功能描述:监控电路 Dual Push-Button Reset IC 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 |
| MIC2788-XYMT-EV | 功能描述:MIC2788 - Power Management, Power Supply Supervisor/Tracker/Sequencer Evaluation Board 制造商:microchip technology 系列:- 零件状态:无货 主要用途:电源管理，电源监控器/跟踪器/序列发生器 嵌入式:- 使用的 IC/零件:MIC2788 主要属性:- 辅助属性:- 所含物品:板 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。