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參數(shù)資料
| 型號： | MAX6337US20D3-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 4-Pin, Ultra-Low-Voltage, Low-Power レP Reset Circuits with Manual Reset |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| 封裝： | TO-253, SOT-143, 4 PIN |
| 文件頁數(shù)： | 4/8頁 |
| 文件大小： | 107K |
| 代理商： | MAX6337US20D3-T |
M
4-Pin, Ultra-Low-Voltage, Low-Power
μP Reset Circ uits with Manual Reset
4
_______________________________________________________________________________________
Pin Desc ription
GND
Ground
1
—
RESET
Active-Low Reset Output.
RESET
remains low while V
CC
is below the reset
threshold, or
MR
is asserted and for a reset timeout period (t
RP
) after V
CC
rises above the reset threshold, or
MR
is deasserted.
RESET
on the
MAX6337 is open-drain.
2
RESET
Active-High Reset Output. RESET remains high while V
CC
is below the
reset threshold, or
MR
is asserted and for a reset timeout period (t
RP
) after
V
CC
rises above the reset threshold, or
MR
is deasserted. RESET also
asserts when
MR
is low.
NAME
FUNCTION
MAX6335
MAX6336
MAX6337
1
2
—
PIN
Applic ations Information
Manual-Reset Inputs
Many μP-based products require manual-reset capabil-
ity, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. A logic low on
MR
asserts reset. Reset remains asserted while
MR
is low,
and for the reset active timeout period after
MR
returns
high.
MR
has an internal 20k
pull-up resistor, so it can
be left unconnected if not used. Connect a normally
open momentary switch from
MR
to GND to create a
manual-reset function; external debounce circuitry is
not required.
Interfac ing to μPs with
Bidirec tional Reset Pins
Since the
RESET
output on the MAX6337 is open-drain,
this device interfaces easily with μPs that have bidirec-
tional reset pins, such as the Motorola 68HC11.
Connecting the μP supervisor’s
RESET
output directly
to the microcontroller’s (μC’s)
RESET
pin with a single
pull-up resistor allows either device to assert reset
(Figure 1).
Negative-Going V
CC
T ransients
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). The Typical Operating
Characteristics show the Maximum Transient Duration
vs. Reset Comparator Overdrive graph. The graph
shows the maximum pulse width that a negative-going
V
CC
transient may typically have without issuing a reset
signal. As the amplitude of the transient increases, the
maximum allowable pulse width decreases.
Ensuring a V alid Reset Output
down to V
CC
= 0
When V
CC
falls below 1V and approaches the minimum
operating voltage of 0.7V, push/pull-structured reset
sinking (or sourcing) capabilities decrease drastically.
High-impedance CMOS-logic inputs connected to the
RESET
pin can drift to indeterminate voltages. This
does not present a problem in most cases, since most
μPs and circuitry do not operate at V
CC
below 1V. For
the MAX6336, where
RESET
must be valid down to 0,
adding a pull-down resistor between
RESET
and GND
removes stray leakage currents, holding
RESET
low
V
CC
V
CC
GND
MAX6337
RESET
MR
V
CC
GND
RESET
INPUT
MOTOROLA
68HCXX
μ
P
Figure 1. Interfacing to μPs with Bidirectional Reset Pins
3
MR
3
Manual-Reset Input. A logic low on
MR
asserts reset. Reset remains
asserted as long as
MR
is low, and for the reset timeout period (t
RP
) after
MR
goes high. Leave unconnected or connect to V
CC
if not used.
4
V
CC
4
Supply Voltage (0.7V to 5.5V)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6337US21D1 | 制造商:Maxim Integrated Products 功能描述:4-PIN ULTRA-LOW VOLTAGE LOW-POWER - Rail/Tube |
| MAX6337US21D1+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.1V 3.3UA 4PIN SOT-143 - Rail/Tube |
| MAX6337US21D1+T | 功能描述:監(jiān)控電路 4-Pin uPower Reset Circuit RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6337US21D1-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監(jiān)視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6337US21D2 | 制造商:Maxim Integrated Products 功能描述:4-PIN ULTRA-LOW VOLTAGE LOW-POWER - Rail/Tube |
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