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參數(shù)資料
| 型號(hào)： | MXD1817UR |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | A3950SEU-T WITH TAPE AND REEL |
| 中文描述： | 低向上復(fù)位電路，功率在3引腳 |
| 文件頁(yè)數(shù)： | 5/11頁(yè) |
| 文件大?。?/td> | 198K |
| 代理商： | MXD1817UR |
Detailed Description
RESET
/RESET Output
A microprocessor
’
s (μP
’
s) reset input starts the micro-
processor in a known state. The MXD1810
–
MXD1813/
MXD1815
–
MXD1818 μP supervisory circuits assert
reset to prevent code-execution errors during power-
up, power-down, and brownout conditions (Figure 4).
Whenever V
CC
falls below the reset threshold, the reset
output asserts. Once V
CC
exceeds the reset threshold,
an internal timer keeps the reset output asserted for the
specified reset timeout period (t
RP
). Reset is also trig-
gered by an externally initiated rising edge on the
RESET
pin (MXD1813/MXD1818), following a low signal
of 1.5μs minimum duration.
Push-Button Reset (MXD1813/MXD1818)
Many μP-based products require push-button reset
capability (Figure 5), allowing the operator, a test tech-
nician, or external logic circuitry to initiate reset. On the
MXD1813/MXD1818, a logic-low on
RESET
held for
greater than 1.5μs asserts a reset.
RESET
deasserts
following a 100ms minimum reset timeout delay
(t
PBRST
). A manual reset input shorter than 1.5μs may
release
RESET
without the 100ms minimum reset time-
out delay. To facilitate use with mechanical switches,
the MXD1813/MXD1818 contain internal debouncing
circuitry. A debounced waveform is shown in Figure 6.
Applications Information
Interfacing to μPs with Bidirectional
Reset Pins
Since the
RESET
output on the MXD1811/MXD1816 is
open drain, these devices interface easily with μPs that
have bidirectional reset pins, such as the Motorola
68HC11. Connecting the μP supervisor
’
s
RESET
output
directly to the microcontroller
’
s (μC
’
s)
RESET
pin allows
either device to assert reset (Figure 7). No external
pullup resistor is required, as it is contained within the
MXD1811/MXD1816.
Negative-Going V
CC
Transients
In addition to issuing a reset to the μP during power-up,
power-down, and brownout conditions, these devices
are relatively immune to short-duration, negative-going
V
CC
transients (glitches).
M
Low-Power μP Reset Circuits in 3-Pin
SC70/SOT23
_______________________________________________________________________________________
5
PIN
SC70
SOT23
NAME
FUNCTION
2
1
RESET
Push-Pull, Active-High Reset Output. RESET changes from low to high when V
CC
drops
below the selected reset threshold. RESET remains high for the reset timeout period after
V
CC
exceeds the device reset threshold.
Supply Voltage and Input for Reset Threshold Monitor
Ground
1
3
2
3
V
CC
GND
MXD1812/MXD1817
PIN
SC70
SOT23
NAME
FUNCTION
2
1
RESET
Open-Drain, Active-Low Reset Output with Manual Reset Detect.
RESET
changes from
high to low when V
CC
drops below the selected reset threshold, or
RESET
is externally
pulled low for at least 1.5μs.
RESET
remains low for the reset timeout period after V
CC
exceeds the device reset threshold or after the external manual reset is released.
RESET
has an internal 5.5k
pullup resistor.
1
3
2
3
V
CC
GND
Supply Voltage and Input for Reset Threshold Monitor
Ground
MXD1813/MXD1818
Pin Descriptions (continued)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MXD1817XR | DMOS Driver; No. of Drivers:1; Supply Voltage Max:36V; Output Current Max:2.8A; Package/Case:16-TSSOP; Peak Reflow Compatible (260 C):Yes RoHS Compliant: Yes |
| MXD1818 | LEAD FREE A3950SLP WITH TAPE & REEL |
| MXD1818UR | Motor Driver IC; Driver Type:Motor; No. of Drivers:1; Supply Voltage Max:5.5V; Output Current Max:1.3A; Supply Voltage:7V; Package/Case:16-DIP; Leaded Process Compatible:Yes; Output Current Min:1.3A RoHS Compliant: Yes |
| MXD1818XR | Motor Controller / Driver IC; Motor Controller Type:Stepper Motor Controller; Drive Configuration:Single Phase, Full Bridge; Supply Voltage Max:50V; Motor Drive Current Max, IO:1.3A; Package/Case:16-SOIC; Supply Voltage:7V RoHS Compliant: Yes |
| MXL1007MJ8 | Low-Noise, Precision Op Amp |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MXD1817UR22 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MXD1817UR22+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.18V 9UA 3PIN SOT-23 - Rail/Tube |
| MXD1817UR22+T | 功能描述:監(jiān)控電路 3-Pin uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MXD1817UR22-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MXD1817UR23 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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