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参数资料
| 型号： | MAX6874ETJ |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors |
| 中文描述： | 6-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC32 |
| 封装： | 7 X 7 MM, 0.80 MM HEIGHT, MO-220, TQFN-32 |
| 文件页数： | 29/40页 |
| 文件大小： | 337K |
| 代理商： | MAX6874ETJ |
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MAX6874/MAX6875
EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
______________________________________________________________________________________
35
Write Disable
A unique write disable feature protects the MAX6874/
MAX6875 from inadvertent user EEPROM writes. As input
voltages that power the serial interface, a P, or any other
writing devices fall, unintentional data may be written onto
the data bus. The user EEPROM write disable function
(see Table 21) ensures that unintentional data does not
corrupt the MAX6874/MAX6875 EEPROM data.
Applications Information
Configuration Download at Power-up
The configuration of the MAX6874/MAX6875 (under-
voltage thresholds, PO_ timeout periods, watchdog
behavior, programmable output conditions, etc.)
depends on the contents of the EEPROM. The EEPROM
is comprised of buffered latches that store the configura-
tion. The local volatile memory latches lose their contents
at power-down. Therefore, at power-up, the device con-
figuration must be restored by downloading the contents
of the EEPROM (non-volatile memory) to the local latches.
This download occurs in a number of steps:
1) Programmable outputs go high impedance with no
power applied to the device.
2) When ABP exceeds +1V, all programmable out-
puts are weakly pulled to GND through a 10A
current sink.
3) When ABP exceeds UVLO, the configuration EEP-
ROM starts to download its contents to the volatile
configuration registers. The programmable outputs
assume their programmed conditional output state
when download is complete.
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
BIT
RANGE
DESCRIPTION
[0]
0 = configuration unlocked.
1 = configuration locked.
45h
8045h
[7:1]
Not used.
Table 20. Configuration Lock Register
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
BIT
RANGE
DESCRIPTION
[0]
0 = write not disabled if PO1 asserts (MAX6874).
1 = write disabled if PO1 asserts (MAX6874). Set to 0 (MAX6875).
[1]
0 = write not disabled if PO2 asserts (MAX6874).
1 = write disabled if PO2 asserts (MAX6874). Set to 0 (MAX6875).
[2]
0 = write not disabled if PO3 (MAX6874)/PO1 (MAX6875) asserts.
1 = write disabled if PO3 (MAX6874)/PO1 (MAX6875) asserts.
[3]
0 = write not disabled if PO4 (MAX6874)/PO2 (MAX6875) asserts.
1 = write disabled if PO4 (MAX6874)/PO2 (MAX6875) asserts.
[4]
0 = write not disabled if PO5 (MAX6874)/PO3 (MAX6875) asserts.
1 = write disabled if PO5 (MAX6874)/PO3 (MAX6875) asserts.
[5]
0 = write not disabled if PO6 (MAX6874)/PO4 (MAX6875) asserts.
1 = write disabled if PO6 (MAX6874)/PO4 (MAX6875) asserts.
[6]
0 = write not disabled if PO7 (MAX6874)/PO5 (MAX6875) asserts.
1 = write disabled if PO7 (MAX6874)/PO5 (MAX6875) asserts.
43h
8043h
[7]
0 = write not disabled if PO8 asserts (MAX6874).
1 = write disabled if PO8 asserts (MAX6874). Set to 0 (MAX6875).
Table 21. Write Disable Register
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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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