参数资料
| 型号： | MIC2778-2BM5 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/6页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR ADJ HYSTER SOT23-5 |
| 标准包装： | 3,000 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 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： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC2778-2BM5TR MIC2778-2BM5TR-ND |
MIC2778
General Description
The MIC2778 is a voltage monitor—uniquely designed to
detect two separate voltage thresholds—combined with a
delay generator and logic. It is designed for monitoring the
battery supply of portable digital systems, particularly PDAs,
pagers, and cellular telephones.
High- and low-voltage thresholds can be adjusted inde-
pendently, allowing for wide hysteresis. Voltage detection
thresholds are accurate to 2%.
If the battery voltage falls below the low-voltage threshold,
the output (RST) is asserted and latched, preventing system
operation until the battery is replaced or recharged. Internal
logic prevents the output from chattering due to battery
recovery or load removal. The output is asserted for 140ms
(minimum) when a fresh battery is inserted. For applications
not requiring built-in delay, see MIC841.
The IC’s power supply input is separate from the detector
inputs, allowing the MIC2778 to be powered from a down-
stream supply, such a boost converter. Supply current is
extremely low (1μA, typical), making it ideal for portable
applications.
A high-precision 1% grade is available. The MIC2778 is sup-
plied in Micrel’s IttyBitty? 5-lead SOT-23-5 package.
Ordering Information
Micrel
MIC2778
Voltage Monitor with Adjustable Hysteresis
Features
? Optimized for PDAs, cellular telephones, pagers,
and other battery-powered devices
? Independently adjustable high- and
low-voltage thresholds
? Internal logic prevents battery-voltage-?uctuation chatter
? High ±2% voltage threshold accuracy; 1% available
? Built in 140ms (minimum) delay deglitches output
? Extremely low 1μA typical supply current
? For applications not requiring built-in delay, see MIC841
? Immune to brief power supply transients
? 5-lead SOT-23 package
Applications
? PDAs
? Pagers
? Cordless phones
? Consumer electronics
? Embedded controllers
? Personal electronics
Part Number
Accurary
Temperature Range
Package
Standard
Marking
Pb-Free
Marking
MIC2778-2BM5
MIC2778-1BM5
UFB
UFA
MIC2778-2YM5
MIC2778-1YM5
UFB*
UFA*
2%
1%
-40°C to +85°C
-40°C to +85°C
SOT-23-5
SOT-23-5
* Underscore indicates a Pb-Free part.
IN
GND
Typical Application
LI-ION
CELL
604K
1%
MIC2778
VDD R ST
100K
MIC5207-3.0BM5
OUT
BYP
EN
470PF
V OUT
3.0V
4.7μF
LTH
56K
1%
HTH
GND
340K
1%
V BAT(HI) = 3.6V
V BAT(LO) = 3.1V
Cellular Telephone Battery Monitor
IttyBitty? is a trademark of Micrel, Inc.
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
January 2005
1
M9999-011405
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2778-2YM5 TR | 功能描述:监控电路 V-Supervisor w/Adj. Hysteresis, Open-Drain Ouput, 2% Accuracy - Lead Free 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 |
| MIC2778-2YM5-TR | 功能描述:Supervisor Open Drain or Open Collector 1 Channel SOT-23-5 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:有效 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:最小为 140 ms 电压 - 阈值:可调节/可选择 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商器件封装:SOT-23-5 标准包装:1 |
| MIC2779H-1BM5 TR | 功能描述:IC SUPERVISOR ADJ HYSTER SOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:低有效 复位超时:标准传输延迟为 60 µs 电压 - 阀值:3V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:Digi-Reel® 其它名称:LM8364BALMF30DKR |
| MIC2779H-1BM5TR | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:RF Micro Devices Inc 功能描述: |
| MIC2779H-1YM5 | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
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