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參數(shù)資料
| 型號(hào)： | MAX6874ETJ+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors |
| 中文描述： | 6-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC32 |
| 封裝： | 7 X 7 MM, TQFN-32 |
| 文件頁數(shù)： | 29/40頁 |
| 文件大?。?/td> | 403K |
| 代理商： | MAX6874ETJ+T |
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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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX6875ETJ+T | EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors |
| MAX6874ETJ+ | EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors |
| MAX6875ETJ+ | EEPROM-Programmable, Hex/Quad, Power-Supply Sequencers/Supervisors |
| MAX6876ETX+ | EEPROM-Programmable, Quad, Power-Supply Tracker/Sequencer Circuit |
| MAX6876ETX+T | EEPROM-Programmable, Quad, Power-Supply Tracker/Sequencer Circuit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6874TCC+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX6875ETJ | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6875ETJ+ | 功能描述:監(jiān)控電路 EEPROM-Prog Quad Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6875ETJ+T | 功能描述:監(jiān)控電路 EEPROM-Prog Quad Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6875ETJ-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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