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参数资料
| 型号： | MAX6312UK47D2-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 5-Pin, Multiple-Input, Programmable Reset ICs |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封装： | MO-178AA, SOT-23, 5 PIN |
| 文件页数： | 8/11页 |
| 文件大小： | 119K |
| 代理商： | MAX6312UK47D2-T |
MAX6305–MAX6313
open-drain, N-channel output. The MAX6308/MAX6309/
MAX6310 feature an active-low, complementary output
structure that both sinks and sources current, and the
MAX6311/MAX6312/MAX6313 have an active-high com-
plementary reset output.
The MAX6305/MAX6308/MAX6311 switch from under-
voltage lockout operation to normal operation between
1.5V < VCC < 2.5V. Below 1.5V, VCC undervoltage-
lockout mode asserts
RESET. Above 2.5V, VCC normal-
operation mode asserts reset if RST IN_ falls below the
RST IN_ threshold.
Manual-Reset Input
(MAX6306/MAX6309/MAX6312)
Many P-based products require manual-reset capability,
allowing an operator or external logic circuitry to initiate a
reset. A logic low on
MR asserts reset. Reset remains
asserted while
MR is low, and for a reset active timeout
period (tRP) after MR returns high. This input has an inter-
nal 63.5kΩ pull-up resistor, so it can be left open if it is not
used.
MR can be driven with TTL-logic levels in 5V sys-
tems, with CMOS-logic levels in 3V systems, or with open-
drain/collector output devices. Connect a normally open
momentary switch from
MR to GND to create a manual-
reset function; external debounce circuitry is not required.
If
MR is driven from long cables or if the device is used in
a noisy environment, connecting a 0.1F capacitor from
MR to ground provides additional noise immunity.
The
MR pin has internal ESD-protection circuitry that may
be forward biased under certain conditions, drawing
excessive current. For example, assume the circuitry driv-
ing
MR uses a +5V supply other than VCC. If VCC drops or
browns out lower than +4.7V,
MR’s absolute maximum rat-
ing is violated (-0.3V to (VCC + 0.3V)), and undesirable
current flows through the ESD structure from
MR to VCC.
To avoid this, it is recommended that the supply for the
MR
pin be the same as the supply monitored by VCC. In this
way, the voltage at
MR will not exceed VCC.
Adjustable Reset Inputs
The MAX6305–MAX6313 each have one or more reset
inputs (RST IN_ /OVRST IN). These inputs are com-
pared to the internal reference voltage (Figure 1).
Connect a resistor voltage divider to RST IN_ such that
VRST IN_ falls below VRSTH (1.23V) when the monitored
voltage (VIN) falls below the desired reset threshold
(VTH) (Figure 2). Calculate the desired reset voltage
with the following formula:
R1 + R2
VTH = ________ x VRSTH
R2
5-Pin, Multiple-Input,
Programmable Reset ICs
6
_
__
_
RST IN1
*
+1.23V
RST IN2
RESET
GENERATOR
RESET***
OVRST IN
GND
VCC
MR
RESET**
MAX6306/MAX6307/MAX6309/MAX6310/MAX6312/MAX6313 ONLY
MAX6305–MAX6310 ONLY
MAX6311/MAX6312/MAX6313 ONLY
MAX6307/MAX6310/MAX6313 ONLY
MAX6305/MAX6308/MAX6311 ONLY
MAX6306/MAX6309/MAX6312 ONLY
MAX6305–MAX6313
*
**
***
Figure 1. Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6312UK47D3 | 制造商:Maxim Integrated Products 功能描述:5-PIN MULTIPLE-INPUT PROGRAMMABLE - Rail/Tube |
| MAX6312UK47D3+T | 功能描述:监控电路 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 |
| MAX6312UK47D3-T | 功能描述:监控电路 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 |
| MAX6312UK47D4 | 制造商:Maxim Integrated Products 功能描述:5-PIN MULTIPLE-INPUT PROGRAMMABLE - Rail/Tube |
| MAX6312UK47D4+T | 功能描述:监控电路 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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