参数资料
| 型号： | MIC2789-XYMT 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： | MIC2788/89 Push Button Reset IC |
| 标准包装： | 1 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 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： | 可调节/可选择 |
| 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： | 576-4008-6 |
Micrel, Inc.
Application Information
Design and Product Advantages
The dual reset programmability of the MIC2788/
MIC2789 allows for already existing manual push
buttons to be used to generate a hardware reset based
on pre-programmed timing requirements. This ability to
increase the functionality of already existing buttons,
allows for cost reduction and more robust phone
designs. The dual reset delay time allows for significant
protection against accidental resets due to its long time
MIC2788/MIC2789
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 MIC2788/MIC2789. 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.
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.
duration and dual push button requirement. The fixed
reset timeout delay allows for more predictable phone
operation during hardware resets. The tri-state option
provides an easy to use way to select between three
reset delay time options with no additional external
components required.
Supply Bypass Capacitor
A 0.1μF input bypass capacitor must be placed from V IN
(Pin 8) to GND (Pin 2).
Programmable Delay Pin (PDY)
The MIC2788/MIC2789 has a programmable dual reset
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.
Figure 1. MIC2788/MIC2789 Used in Multiple Supply
PDY Configuration
OPEN
GND
V IN
t SETUP
2s
4s
6s
System
The reset outputs /RST and RSTP are asserted when
the dual reset delay time, t SETUP , is exceeded while the
/MR0, /MR1 pins are driven low. Both the reset outputs
remain asserted for a factory-programmed reset timeout
Dual Manual Reset Inputs (/MR0, /MR1)
The /MR0, /MR1 input pins have integrated pull-up
resistors for the MIC2788 but require external pull-up
resistors for the MIC2789. 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. For
most applications, the pull-up voltage will be the same
as the power supply that supplies V IN to the
MIC2788/MIC2789. As shown in Figure 1, it is possible
delay time t RESET . Two options are available with 140ms
or 240ms minimum t RESET duration. The /RST pin is
driven active low while the RSTP pin is driven active
high for the t RESET duration. The reset outputs are de-
asserted for V IN < 1.6V.
Figure 2. Manual Reset Function
October 2011
10
M9999-102711-A
相关PDF资料 |
PDF描述 |
|---|---|
| MIC2821-4GJLYML TR | IC PWR MGMT DGTL TRPL LDO 16-MLF |
| MIC2826-A0YMT TR | IC PWR MANAGER PROG 4OUT 14-TMLF |
| MIC28500YJL TR | IC REG BUCK SYNC ADJ 4A 28MLF |
| MIC28510YJL TR | IC REG BUCK SYNC ADJ 4A 28MLF |
| MIC29152WD TR | IC REG LDO ADJ 1.5A TO-252-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2790L-04VD6-T5 | 功能描述:Supervisor Push-Pull, Totem Pole 1 Channel TSOT-23-6 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:推挽式，图腾柱 复位:低有效 复位超时:可调节/可选择 电压 - 阈值:0.4V 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:SOT-23-6 细型，TSOT-23-6 供应商器件封装:TSOT-23-6 标准包装:1 |
| MIC2790N-04VMT T5 | 制造商:Micrel Inc 功能描述: 制造商:Micrel Inc 功能描述:IC SUPERVISOR 6TMLF 制造商:Micrel Inc 功能描述:upervisor with High-Accuracy |
| MIC2790N-04VMT TR | 制造商:Micrel Inc 功能描述:IC SUPERVISOR 6TMLF |
| MIC2790N-04VMT-T5 | 功能描述:Supervisor Open Drain or Open Collector 1 Channel 6-TDFN (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:开路漏极或开路集电极 复位:低有效 复位超时:可调节/可选择 电压 - 阈值:0.4V 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:6-UDFN 裸露焊盘 供应商器件封装:6-TDFN（2x2） 标准包装:1 |
| MIC2790N-04VMT-TR | 功能描述:Supervisor Open Drain or Open Collector 1 Channel 6-TDFN (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:开路漏极或开路集电极 复位:低有效 复位超时:可调节/可选择 电压 - 阈值:0.4V 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:6-UDFN 裸露焊盘 供应商器件封装:6-TDFN（2x2） 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。