- 您现在的位置：买卖IC网 > PDF目录1845 > MAX6874ETJ+ (Maxim Integrated Products)IC SEQUENCE/SUPERVISOR 32TQFN PDF资料下载
参数资料
| 型号： | MAX6874ETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/40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 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页当前第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页
EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
Powering the MAX6874/MAX6875
The MAX6874/MAX6875 derive power from the positive
voltage-detector inputs: IN1 or IN3–IN5. A virtual diode-
ORing scheme selects the positive input that supplies
power to the device (see the Functional Diagram ). IN1
must be at least +4V or one of IN3–IN5 (MAX6874)/
IN3–IN4 (MAX6875) must be at least +2.7V to ensure
device operation. An internal LDO regulates IN1 down
to +5.4V.
The highest input voltage on IN3 –IN5 (MAX6874)/
IN3–IN4 (MAX6875) supplies power to the device, unless
V IN1 ≥ +6.5V, in which case IN1 supplies power to the
device. For +4V < V IN1 < +6.5V and one of V IN3 through
V IN5 > +2.7V, the input power source cannot be deter-
mined due to the dropout voltage of the LDO. Internal
hysteresis ensures that the supply input that initially pow-
ered the device continues to power the device when
multiple input voltages are within 50mV of each other.
ABP powers the analog circuitry; bypass ABP to GND
with a 1μF ceramic capacitor installed as close to the
Table 1. Programmable Features
FEATURE
device as possible. The internal supply voltage, mea-
sured at ABP, equals the maximum of IN3 –IN5
(MAX6874)/IN3–IN4 (MAX6875) if V IN1 = 0, or equals
+5.4V when V IN1 > +6.5V. Do not use ABP to provide
power to external circuitry.
The MAX6874/MAX6875 also generate a digital supply
voltage (DBP) for the internal logic circuitry and the
EEPROM; bypass DBP to GND with a 1μF ceramic
capacitor installed as close to the device as possible.
The nominal DBP output voltage is +2.55V. Do not use
DBP to provide power to external circuitry.
Inputs
The MAX6874/MAX6875 contain multiple logic and volt-
age-detector inputs. Table 1 summarizes these various
inputs.
Set the threshold voltages for each voltage-detector
input with registers 00h–05h. Each threshold voltage is
an undervoltage threshold. Set the threshold range for
each voltage detector with register 0Dh.
DESCRIPTION
High-Voltage Input
(IN1)
Voltage Input (IN2)
Voltage Input
IN3–IN6 (MAX6874),
IN3–IN4 (MAX6875)
Programmable Outputs
PO1–PO8 (MAX6874),
PO1–PO5 (MAX6875)
General-Purpose
Logic Inputs,
?
?
?
?
?
?
?
?
?
?
?
?
?
?
Undervoltage threshold
+2.5V to +13.2V threshold in 50mV increments
+1.25V to +7.625V threshold in 25mV increments
Undervoltage threshold
+2.5V to +5.5V threshold in 50mV increments
+1.25V to +3.05V threshold in 25mV increments
Undervoltage threshold
+1V to +5.5V threshold in 20mV increments
+0.5V to +3.05V threshold in 10mV increments
Active high or active low
Open-drain output
Dependent on MR , MARGIN , IN_, GPI1–GPI4 , WD, and/or PO_
Programmable timeout periods of 25μs, 1.5625ms, 6.25ms, 25ms, 50ms, 200ms, 400ms, or 1.6s
Active-high or active-low logic levels
GPI1–GPI4 (MAX6874), ?
GPI1–GPI3 (MAX6875)
?
Configure GPI_ as inputs to watchdog timers or programmable output stages
Clear dependent on any combination of one GPI_ input and one programmable output, a GPI_ input
only, or a programmable output only
Watchdog Timer
?
?
?
Initial watchdog timeout period of 6.25ms, 25ms, 100ms, 400ms, 1.6s, 6.4s, 25.6s, or 102.4s
Normal watchdog timeout period of 6.25ms, 25ms, 100ms, 400ms, 1.6s, 6.4s, 25.6s, or 102.4s
Watchdog enable/disable
12
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6876ETX+ | IC TRACKER/SUPERVISOR MON 36TQFN |
| MAX6879ETE+ | IC SEQUENCE/SUPERVISOR 16TQFN |
| MAX6881ETE+ | IC SEQUENCE/SUPERVISOR 16TQFN |
| MAX6884ETP+ | IC SUPERVISOR PWR SPL 20-TQFN |
| MAX6886ETP+T | IC SUPERVISOR HEX 20-TQFN |
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 |
发布紧急采购，3分钟左右您将得到回复。