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| 型号： | MAX6845UKD3+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/9页 |
| 文件大小： | 0K |
| 描述： | IC MPU/RESET CIRC SOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 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： | 标准包装 |
| 产品目录页面： | 1419 (CN2011-ZH PDF) |
| 其它名称： | MAX6845UKD3+TDKR |
19-2625; Rev 2; 12/05
Ultra-Low-Voltage μP Reset Circuits and
Voltage Detectors
General Description
The MAX6841–MAX6845 microprocessor (μP) supervi-
sory circuits monitor ultra-low-voltage power supplies in
μP and digital systems. They provide excellent circuit
reliability at low cost by eliminating external compo-
nents and adjustments when used with +0.9V to +1.5V
systems. Factory-trimmed reset thresholds are avail-
able for the MAX6841/MAX6842. The MAX6843/
MAX6844/MAX6845 provide a RESET IN input, allowing
the user to externally adjust the reset threshold. The
MAX6841–MAX6845 family features a debounced man-
ual reset input ( MR ). The reset comparator is designed
to ignore fast transients on V CC .
The MAX6841–MAX6845 assert a reset signal whenev-
er the V CC supply voltage declines below a preset or
adjustable threshold or whenever manual reset ( MR ) is
asserted. Reset remains asserted for a fixed timeout
delay after V CC has risen above the reset threshold and
when manual reset is deasserted. Five timeout periods
are available for each part: 150μs (voltage detector ver-
sion), 1.5ms, 30ms, 210ms, and 1.68s (typ).
The MAX6841/MAX6843 have an active-low push-pull
reset output. The MAX6841/MAX6842/MAX6844 have
Features
? Factory-Set Reset Threshold Voltages for
Monitoring Supplies from 0.9V to 1.5V
(MAX6841/MAX6842)
? Adjustable Threshold RESET IN
(MAX6843/MAX6844/MAX6845)
? Low Power Consumption: 5.7μA (typ)
? ±2.5% Reset Threshold Accuracy
Over Temperature
? Five Timeout Periods: 150μs (Voltage Detector
Version), 1.5ms, 30ms, 210ms, and 1.68s
? Available in Three Output Configurations
Push-Pull RESET
Push-Pull RESET
Open-Drain RESET
? Guaranteed Reset Valid to V CC = 0.55V
(Active Low)
? Manual Reset Input
? Immune to Short V CC Transients
? Space-Saving 5-Pin SOT23 Package
Ordering Information
an active-high push-pull reset output, and the
MAX6842/MAX6845 have an active-low open-drain
reset output. The active-low open-drain reset output
requires a pullup resistor that can be connected to a
voltage from 0 to V CC .
The low supply current (5.7μA) and small package
(SOT23-5) make the MAX6841–MAX6845 ideal for use
in portable equipment.
PART
MAX6841 _UKD_-T
MAX6842 _UKD_-T
MAX6843 UKD_-T
MAX6844 UKD_-T
MAX6845 UKD_-T
TEMP RANGE
-40 ° C to +85 ° C
-40 ° C to +85 ° C
-40 ° C to +85 ° C
-40 ° C to +85 ° C
-40 ° C to +85 ° C
PIN-PACKAGE
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
5 SOT23-5
Note: Insert desired suffix letter (from the Threshold Suffix Guide
and the Active Timeout Period tables) into the blanks to com-
Applications
Computers
Controllers
Intelligent Instruments
Critical μP and μC Power Monitoring
Portable/Battery-Powered Equipment
Telecom/Networking Equipment
Basestations
plete the part number. For example, the MAX6842GUKD1 has a
reset threshold of 1.11V and a typical reset timeout period of
1.5ms. Sample stock is generally available on standard versions
only (see the Standard Versions table). Standard versions
require a minimum order increment of 2.5k units. Nonstandard
versions must be ordered in 10k-unit increments. Contact factory
for availability. All parts are offered in tape-and-reel only.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Pin Configurations
TOP VIEW
Servers/Workstations
RESET 1
5 V CC
RESET
(RESET)
1
5 V CC
MAX6841
MAX6843
GND 2
MAX6842
GND 2
MAX6844
MAX6845
Selector Guide and Typical Operating Circuit appear at end
of data sheet.
RESET 3
4 MR
RESET IN 3
4 MR
SOT23-5
SOT23-5
( ) ARE FOR 6844
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
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|---|---|
| MAX6845UKD4 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6845UKD4+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR ADJV 8.1UA 5PIN SOT-23 - Rail/Tube |
| MAX6845UKD4+T | 功能描述:监控电路 NULL 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 |
| MAX6845UKD4-T | 功能描述:监控电路 NULL 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 |
| MAX6846KARD3 | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product |
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