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参数资料
| 型号： | MAX6467US25D7-T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | ±15kV ESD, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceivers; Temperature Range: -40°C to 85°C; Package: 8-MSOP T&R |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| 封装： | TO-253, SOT-143, 4 PIN |
| 文件页数： | 8/12页 |
| 文件大小： | 379K |
| 代理商： | MAX6467US25D7-T |
Detailed Description
Reset Output
The MAX6467 provides an active-low open-drain
RESET output. The MAX6468 provides an active-low
push-pull RESET output. RESET asserts low if VCC
drops below the selected threshold or if a falling edge
occurs on MR. RESET remains low for the VCC reset
timeout period after VCC increases above the threshold
voltage or is one-shot pulsed low for the MR timeout
period after a falling edge on MR.
Manual Reset Input
Many P-based products require manual reset capability,
allowing the operator, a test technician, or external logic
circuitry to initiate a reset. A falling edge on MR asserts
RESET low. RESET is one-shot pulsed low for the MR
timeout period after a falling edge on MR. An internal
1.5k
pullup resistor to VCC allows MR to be left uncon-
nected if not used. MR can be driven with TTL or CMOS-
logic levels, or with open-drain/collector outputs. Connect
a normally open momentary pushbutton switch from MR
to GND to realize a manual reset function. External
debounce circuitry is not required, as the MAX6467/
MAX6468 respond to the first falling edge on MR and
ignore subsequent falling edges within the reset timeout
period and during the MR debounce period (see Figure
1). After MR goes high for 150ms (tDEB), the manual reset
one-shot is ready to trigger a reset on the next MR falling
edge. Connect a 0.1F capacitor from MR to GND when
using long cables to provide additional noise immunity
(Figure 2).
MAX6467/MAX6468
Microprocessor Supervisory Reset Circuits
with Edge-Triggered, One-Shot Manual Reset
_______________________________________________________________________________________
5
Pin Description
PIN
NAME
FUNCTION
1
GND
Ground
2
RESET
Reset Output. RESET is an active-low open-drain (MAX6467) or push-pull (MAX6468) output. RESET asserts
low when VCC drops below the selected threshold and remains low for the VCC reset timeout period after
VCC rises above the threshold. The RESET one-shot asserts low for a fixed MR reset timeout period on the
falling edge of the manual reset input. The open-drain output requires an external pullup resistor.
3
MR
Manual Reset Input. Drive MR low to initiate a reset output. MR controls an edge-triggered one-shot that
asserts RESET low for a fixed MR timeout period when MR is driven low. Internal timing circuitry ignores
switch close and open bounce to ensure proper one-shot reset timing.
4VCC
Power-Supply Input. VCC provides power to the device and is also a monitored voltage. When VCC drops
below the selected threshold, RESET asserts low and remains low for the reset timeout period after VCC rises
above the threshold. For better noise immunity, bypass VCC to GND with a 0.1F capacitor.
VCC
GND
MR
tRP
GND
RESET
VTH
SWITCH
BOUNCE
SWITCH
BOUNCE
SWITCH
BOUNCE
tMRP
tDEB
Figure 1. Timing Diagram
相关PDF资料 |
PDF描述 |
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| MAX6467US26D3-T | ±15kV ESD, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceivers; Temperature Range: -40°C to 85°C; Package: 8-MSOP T&R |
| MAX6467US26D7-T | ±15kV ESD, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceivers; Temperature Range: -40°C to 85°C; Package: 14-SOIC T&R |
| MAX6467US27D3-T | ±15kV ESD, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceivers; Temperature Range: -40°C to 85°C; Package: 14-SOIC T&R |
| MAX6467US28D3-T | ±15kV ESD, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceivers; Temperature Range: -40°C to 85°C; Package: 8-SOIC T&R |
| MAX6467US28D7-T | ±15kV ESD, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceivers; Temperature Range: -40°C to 85°C; Package: 8-SOIC T&R |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6467US26D3 | 制造商:Maxim Integrated Products 功能描述:MICROPROCESSOR SUPERVISORY RESET CI - Rail/Tube |
| MAX6467US26D3+ | 制造商:Rochester Electronics LLC 功能描述: |
| MAX6467US26D3+T | 功能描述:监控电路 MPU Supervisory 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 |
| MAX6467US26D3-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 |
| MAX6467US26D7 | 制造商:Maxim Integrated Products 功能描述:MICROPROCESSOR SUPERVISORY RESET CI - Rail/Tube |
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