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參數(shù)資料
| 型號(hào)： | MAX6468US22D3 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset |
| 中文描述： | 微處理器監(jiān)控復(fù)位電路，帶有邊沿觸發(fā)，單發(fā)手動(dòng)復(fù)位 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大?。?/td> | 224K |
| 代理商： | MAX6468US22D3 |
M
Applications Information
Falling V
CC
Transients
In addition to issuing a reset to the μP during power-up,
power-down, and brownout conditions, the MAX6467/
MAX6468 are relatively immune to short-duration falling
V
CC
transients (glitches). The
Typical Operating
Characteristics
section shows the Maximum Transient
Duration vs. V
CC
Overdrive for which the MAX6467/
MAX6468 do not generate a reset pulse. This graph was
generated using a falling pulse applied to V
CC
starting
above the actual reset threshold and ending below the
threshold by the magnitude indicated (V
CC
Overdrive).
The graph indicates the typical maximum pulse width a
falling V
CC
transient can have without initiating a reset
pulse. As the magnitude of the transient increases (goes
farther below the reset threshold), the maximum allowable
pulse width decreases. A 0.1μF bypass capacitor from
V
CC
to GND provides additional transient immunity.
Ensuring a Valid RESET Output Down
to V
CC
= 0V
The MAX6467/MAX6468 guarantee proper operation
down to V
CC
= +1V. In applications that require valid
reset levels down to V
CC
= 0V, a pulldown resistor to
active-low outputs (MAX6468 only, Figure 3) ensures
that
RESET
remains valid while the
RESET
output can
no longer sink current. This scheme does not work with
the open-drain outputs of the MAX6467. Ensure that the
resistor value used does not overload the
RESET
output
when V
CC
is above the reset threshold. For most appli-
cations, use 100k
to 1M
.
Microprocessor Supervisory Reset Circuits
with Edge-Triggered, One-Shot Manual Reset
6
_______________________________________________________________________________________
RESET TIMEOUT SUFFIX
V
CC
RESET TIMEOUT PERIOD
(min/max) (ms)
MR
TIMEOUT PERIOD
(min/max) (ms)
MR
RISING DEBOUNCE PERIOD
(min/max) (ms)
D3
D7
150/300
1200/2400
150/300
150/300
150/300
150/300
Reset Timeout Delay*
*
Additional reset timeout options may be available. Contact factory for availability.
MAX6468
V
CC
GND
RESET
R1
100k
Figure 3.
RESET
Valid to V
CC
= 0V
Chip Information
TRANSISTOR COUNT: 748
PROCESS: BiCMOS
1.5k
V
CC
MR ONE-SHOT/
DEBOUNCE
RESET
TIMEOUT
PERIOD
RESET
OUTPUT
V
CC
1.23V
V
CC
MR
RESET
GND
MAX6467
MAX6468
Figure 2. Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6468US22D3+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.188V 7UA 4PIN SOT-143 - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX6468US22D3+T | 功能描述:監(jiān)控電路 MPU Supervisory 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 |
| MAX6468US22D3-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 |
| MAX6468US22D7 | 制造商:Maxim Integrated Products 功能描述:MICROPROCESSOR SUPERVISORY RESET CI - Rail/Tube |
| MAX6468US22D7+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.188V 7UA 4PIN SOT-143 - Rail/Tube |
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