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参数资料
| 型号： | MAX6890ETI |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors |
| 中文描述： | 6-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC28 |
| 封装： | 5 X 5 MM, TQFN-28 |
| 文件页数： | 5/40页 |
| 文件大小： | 255K |
| 代理商： | MAX6890ETI |
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MAX6889/MAX6890/MAX6891
EEPROM-Programmable, Octal/Hex/Quad,
Power-Supply Sequencers/Supervisors
______________________________________________________________________________________
13
Powering the
MAX6889/MAX6890/MAX6891
The MAX6889/MAX6890/MAX6891 derive power from
the voltage detector inputs: IN1–IN5 (MAX6889/
MAX6890), IN1–IN4 (MAX6891), or an external VCC
supply. A virtual diode-ORing scheme selects the posi-
tive input that supplies power to the device (see the
Functional Diagram). IN1 must be at least 4V, or one of
IN2–IN5 (MAX6889/MAX6890)/IN2–IN4 (MAX6891)
must be at least 2.7V to ensure device operation. An
internal LDO regulates IN1 down to 5.4V.
The highest input voltage on IN2–IN5 (MAX6889/
MAX6890)/IN2–IN4 (MAX6891) supplies power to the
device, unless VIN1 > 6.5V, in which case IN1 supplies
power to the device. For 4V < VIN1 < 6.5V and one of
VIN2–VIN5 > 2.7V, the input power source cannot be
determined due to the dropout voltage of the LDO.
Internal hysteresis ensures that the supply input that ini-
tially powered the device continues to power the device
when multiple input voltages are within 50mV of
each other.
VCC powers the analog circuitry. Bypass VCC to GND
with a 1F ceramic capacitor installed as close to the
device as possible. The internal supply voltage, mea-
sured at VCC, equals the maximum of IN2–IN5 if VIN1 =
0V, or equals 5.4V when VIN1 > 6.5V. Do not use the
internally generated VCC to provide power to external
circuitry. Power cannot be supplied through high-
impedance voltage detector inputs. To externally sup-
ply power through VCC:
MAX6889/MAX6890/MAX6891
FEATURE
DESCRIPTION
High-Voltage Input IN1
2.5V to 13.2V threshold in 50mV increments.
1.25V to 7.625V threshold in 25mV increments.
Positive Voltage Input
IN2–IN7 (MAX6889)
IN2–IN6 (MAX6890)
IN2–IN4 (MAX6891)
1V to 5.5V threshold in 20mV increments.
0.5V to 3.05V threshold in 10mV increments.
0.1667V to 1.0167V threshold in 3.3mV increments in high-Z mode.
High-Voltage Input IN8
(MAX6889)
2.5V to 15.25V threshold in 50mV increments.
1.25V to 7.625V threshold in 25mV increments.
0.1667V to 1.0167V threshold in 3.3mV increments in high-Z mode.
Programmable Outputs
PO1–PO10 (MAX6889)
PO1–PO8 (MAX6890)
PO1–PO5 (MAX6891)
Active-high or active-low.
Open-drain or weak pullup output.
Dependent on
MR, MARGIN, IN_, GPI_, and WD.
Programmable reset timeout periods of 25s, 1.5625ms, 6.25ms, 25ms, 50ms, 200ms, 400ms,
or 1.6s.
General-Purpose Logic Inputs:
GPI1–GPI4
(MAX6889–MAX6890)
GPI1–GPI3 (MAX6891)
Active-high or active-low logic levels.
Configure GPI_ as inputs to the watchdog timer or the programmable output stages.
Watchdog Timer
Clear dependent on any combination of one GPI_ input and one programmable output, a GPI_
input only, or a programmable output only.
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.
Manual Reset Input (
MR)
Forces PO_ into the active output state when
MR = GND.
PO_ deassert after
MR releases high and the PO_ timeout period expires.
VCC Power Mode
Programs whether the device is powered from the highest IN_ input or from an external supply
connected to VCC.
Write Disable
Locks user EEPROM based on PO_.
Configuration Lock
Locks configuration registers and EEPROM.
Table 1. Programmable Features
相关PDF资料 |
PDF描述 |
|---|---|
| MAX6891ETP | EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors |
| MG200-BCG24HD | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
| MG200-BCG24H | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
| MG200-BCG28HD | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
| MG200-BCG5H | T-1 3/4 SINGLE COLOR LED, GREEN, 5.1 mm |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6890ETI+ | 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 |
| MAX6890ETI-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 |
| MAX6891ETP | 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 |
| MAX6891ETP+ | 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 |
| MAX6891ETP+T | 功能描述:监控电路 EEPROM-Programmable Octal/Hex/Quad Power-Supply Sequencers/Supervisors 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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