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| 型号： | MAX6337US25D1+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/7页 |
| 文件大小： | 0K |
| 描述： | IC MPU/RESET CIRC 2.50V SOT143-4 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 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 1 ms |
| 电压 - 阀值： | 2.5V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-253-4，TO-253AA |
| 供应商设备封装： | SOT-143-4 |
| 包装： | 带卷 (TR) |
4-Pin, Ultra-Low-Voltage, Low-Power
μP Reset Circuits with Manual Reset
Pin Description
PIN
MAX6335
1
MAX6336
MAX6337
1
NAME
GND
Ground
FUNCTION
Active-Low Reset Output. RESET remains low while V CC is below the reset
—
2
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.
Active-High Reset Output. RESET remains high while V CC is below the
2
—
RESET
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.
Manual-Reset Input. A logic low on MR asserts reset. Reset remains
3
3
MR
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
4
V CC
Supply Voltage (0.7V to 5.5V)
Applications 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.
Interfacing to μPs with
Bidirectional 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
signal. As the amplitude of the transient increases, the
maximum allowable pulse width decreases.
Ensuring a Valid 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
to the microcontroller’s (μC’s) RESET pin with a single
V CC
V CC
pull-up resistor allows either device to assert reset
(Figure 1).
Negative-Going V CC Transients
In addition to issuing a reset to the μP during power-up,
MR
MAX6337
RESET
μ P
MOTOROLA
68HCXX
RESET
INPUT
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
GND
GND
V CC transient may typically have without issuing a reset
Figure 1. Interfacing to μPs with Bidirectional Reset Pins
4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6337US25D2 | 制造商:Maxim Integrated Products 功能描述:4-PIN ULTRA-LOW VOLTAGE LOW-POWER - Rail/Tube |
| MAX6337US25D2+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.5V 3.3UA 4PIN SOT-143 - Rail/Tube |
| MAX6337US25D2+T | 功能描述:监控电路 4-Pin uPower Reset Circuit 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 |
| MAX6337US25D2-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 |
| MAX6337US25D3 | 制造商:Maxim Integrated Products 功能描述:4-PIN ULTRA-LOW VOLTAGE LOW-POWER - Rail/Tube |
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