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参数资料
| 型号： | MAX6874ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/40页 |
| 文件大小： | 0K |
| 描述： | IC SEQUENCE/SUPERVISOR 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 43 |
| 类型： | 序列发生器 |
| 监视电压数目： | 6 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 8 种可选阀值组合 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 管件 |
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EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
Detailed Description
The MAX6874/MAX6875 EEPROM-configurable, multi-
voltage supply sequencers/supervisors monitor several
voltage detector inputs and general-purpose logic
inputs, and feature programmable outputs for highly
configurable power-supply sequencing applications.
The MAX6874 features six voltage detector inputs, four
general-purpose logic inputs, and eight programmable
outputs, while the MAX6875 features four voltage
detector inputs, three general-purpose logic inputs,
and five programmable outputs. Manual reset and mar-
gin disable inputs simplify board-level testing during
the manufacturing process. The MAX6874/MAX6875
feature an accurate internal 1.25V reference.
All voltage detectors provide configurable thresholds for
undervoltage detection. One high-voltage input (IN1)
provides detector threshold voltages from +1.25V to
+7.625V in 25mV increments or +2.5V to +13.2V in 50mV
increments. A positive input (IN2) provides detector
threshold voltages from +1.25V to +3.05V in 25mV incre-
ments or +2.5V to +5.5V in 50mV increments. Positive
inputs (IN3–IN6) provide detector threshold voltages
from +0.5V to +3.05V in 10mV increments or +1.0V to
+5.5V in 20mV increments.
The host controller communicates with the MAX6874/
MAX6875’s internal 4kb user EEPROM, configuration
EEPROM, and configuration registers through an
SMBus/I 2 C-compatible serial interface (see Figure 1).
Program the open-drain outputs as active-high or active-
low. Program each output to assert on any voltage detec-
tor input, general-purpose logic input, watchdog timer,
manual reset, or other output stages. Programmable tim-
ing delay blocks configure each output to wait between
25μs and 1600ms before de-asserting.
The MAX6874/MAX6875 feature a watchdog timer,
adding flexibility. Program the watchdog timer to assert
one or more programmable outputs. Program the watch-
dog timer to clear on a combination of one GPI_ input
and one programmable output, one of the GPI_ inputs
only, or one of the programmable outputs only. The initial
and normal watchdog timeout periods are independently
programmable from 6.25ms to 102.4s.
A virtual diode-ORing scheme selects the input that pow-
ers the MAX6874/MAX6875. The MAX6874/MAX6875
derive power from IN1 if V IN1 > +6.5V or from the highest
voltage on IN3–IN5 if V IN1 < +2.7V. The power source
cannot be determined if +4V < V IN1 < +6.5V and one
of V IN3 through V IN5 > +2.7V. The programmable out-
puts maintain the correct programmed logic state for
V ABP > V UVLO . One of IN3 through IN5 must be
greater than +2.7V or IN1 must be greater than +4V for
device operation.
IN_
COMPARATORS
LOGIC NETWORK
FOR PO_
OUTPUT
STAGES
PO_
GPI_, MR,
MARGIN
WATCHDOG
TIMER
GPI_
SDA,
SCL
SERIAL
INTERFACE
REGISTER BANK
EEPROM
(USER AND
CONFIG)
CONTROLLER
ANALOG
BLOCK
DIGITAL
BLOCK
Figure 1. Top-Level Block Diagram
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6874ETJ+ | 功能描述:监控电路 EEPROM-Prog Hex Power-Sup Sequencer 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 |
| MAX6874ETJ+T | 功能描述:监控电路 EEPROM-Prog Hex Power-Sup Sequencer 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 |
| MAX6874ETJ-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 |
| MAX6874TCC+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX6875ETJ | 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 |
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