- 您现在的位置：买卖IC网 > PDF目录13279 > MAX6871ETJ+T (Maxim Integrated Products)IC SEQUENCE/SUPERVISOR 32TQFN PDF资料下载
参数资料
| 型号： | MAX6871ETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/51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： | 2,500 |
| 类型： | 序列发生器 |
| 监视电压数目： | 4 |
| 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： | 5 种可调阀值电压 |
| 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： | 带卷 (TR) |
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页第12页当前第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页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页
EEPROM-Programmable Hex/Quad
Power-Supply Sequencers/Supervisors with ADC
Powering the MAX6870/MAX6871
The MAX6870/MAX6871 derive power from the positive
voltage-detector inputs: IN1, or IN3 – IN6. 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 – IN6 (MAX6870)/
IN3/IN4 (MAX6871) 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 – IN6 (MAX6870)/
IN3/IN4 (MAX6871) 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 IN6 > +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
device as possible. The internal supply voltage, mea-
sured at ABP, equals the maximum of IN3 – IN6
(MAX6870)/IN3/IN4 (MAX6871) if V IN1 = 0, or equals
+5.4V when V IN1 > +6.5V. Do not use ABP to provide
power to external circuitry.
Table 1. Programmable Features
The MAX6870/MAX6871 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.
ADC
The MAX6870/MAX6871 feature an internal 10-bit ADC
that monitors the voltage-detector inputs and auxiliary
inputs through an internal multiplexer that sequences
through all input voltages in 200ms. Registers 50h to
5Fh store the ADC data. Read the ADC data from the
MAX6870/MAX6871 with the serial interface. The ADC
strictly monitors input voltages and has no effect on
power-supply sequencing, reset detection, or the pro-
grammable outputs.
Inputs
The MAX6870/MAX6871 contain multiple logic and volt-
age-detector inputs. Each voltage-detector input is
simultaneously monitored for primary and secondary
thresholds. The primary threshold must be an under-
voltage threshold. The secondary threshold may be an
undervoltage or overvoltage threshold. Table 1 summa-
rizes these various inputs.
FEATURE
?
Primary undervoltage threshold
DESCRIPTION
High Voltage Input
(IN1)
Bipolar Voltage Input
(IN2)
Positive Voltage Input
IN3 – IN6 (MAX6870)
IN3, IN4 (MAX6871)
?
?
?
?
?
?
?
?
?
?
?
Secondary overvoltage or undervoltage threshold
+2.5V to +13.2V threshold in 50mV increments
+1.25V to +7.625V threshold in 25mV increments
Primary undervoltage threshold
Secondary overvoltage or undervoltage threshold
±2.5V to ±15.25V threshold in 50mV increments
±1.25V to ±7.625V threshold in 25mV increments
Primary undervoltage threshold
Secondary overvoltage or undervoltage threshold
+1V to +5.5V threshold in 20mV increments
+0.5V to +3.05V threshold in 10mV increments
?
Programmable Outputs ?
Active high or active low
Open-drain, weak pullup, or charge-pump output
PO1 – PO4 (MAX6870),
PO1, PO2 (MAX6871)
?
?
Weak pullup to IN3 – IN6 (IN3 or IN4 for MAX6871) or ABP
Dependent on MR , MARGIN , IN_, GPI1 – GPI4 , WDI1 and WDI2, and/or PO_
?
?
Programmable Outputs ?
PO5 – PO8 (MAX6870), ?
Programmable timeout periods of 25μs, 1.5625ms, 6.25ms, 25ms, 50ms, 200ms, 400ms, or 1.6s
Active high or active low
Open-drain, weak pullup, or push-pull output
Weak pullup to IN3 – IN6 (IN3 or IN4 for MAX6871) or ABP
PO3, PO4, PO5
(MAX6871)
?
?
?
Push-pull to IN3 – IN6 (IN3 or IN4 for MAX6871)
Dependent on MR , MARGIN , IN_, GPI1 – GPI4 , WDI1 and WDI2 , and/or IN_
Programmable timeout periods of 25μs, 1.5625ms, 6.25ms, 25ms, 50ms, 200ms, 400ms, or 1.6s
______________________________________________________________________________________
13
相关PDF资料 |
PDF描述 |
|---|---|
| GCA36DTMT-S273 | CONN EDGECARD 72POS R/A .125 SLD |
| MAX634CPA | IC REG INV FLYBK ADJ 0.15A 8DIP |
| ADP121-AUJZ28R7 | IC REG LDO 2.8V .15A TSOT-23-5 |
| RCM36DSEH-S243 | CONN EDGECARD 72POS .156 EYELET |
| 500R07N3R3CV4T | CAP CER 3.3PF 50V NP0 0402 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6872ETJ | 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 |
| MAX6872ETJ+ | 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 |
| MAX6872ETJ+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 |
| MAX6872ETJ-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 |
| MAX6873ETJ | 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。