參數(shù)資料
型號(hào)： MAX6872ETJ
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 with Charge-Pump Outputs
中文描述： 6-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC32
封裝： 7 X 7 MM, 0.80 MM HEIGHT, MO-220, TQFN-32
文件頁(yè)數(shù)： 37/48頁(yè)
文件大?。?/td> 374K
代理商： MAX6872ETJ
MAX6872/MAX6873
EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
42
______________________________________________________________________________________
Configuration Lock
Lock the configuration register bank and configuration
EEPROM contents after initial programming by setting
the lock bit high (see Table 28). Locking the configura-
tion prevents write operations to all registers except the
configuration lock register. Clear the lock bit to recon-
figure the device.
Write Disable
A unique write disable feature protects the MAX6872/
MAX6873 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 dis-
able function (see Table 29) ensures that unintentional
data does not corrupt the MAX6872/MAX6873 EEP-
ROM data.
Applications Information
Configuration Download at Power-Up
The configuration of the MAX6872/MAX6873 (undervolt-
age/overvoltage thresholds, PO_ timeout periods,
watchdog behavior, programmable output conditions
and configurations, etc.) depends on the contents of
the EEPROM. The EEPROM comprises buffered latches
that store the configuration. The local volatile memory
latches lose their contents at power-down. Therefore, at
power-up, the device configuration 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.
4) Any attempt to communicate with the device prior to
this download completion results in a NACK being
issued from the MAX6872/MAX6873.
Table 26. Watchdog Timeout Period Selection (Addresses 3Dh (Watchdog 1), 3Fh
(Watchdog 2))
REGISTER
ADDRESS
EEPROM MEMORY
ADDRESS
BIT
RANGE
DESCRIPTION
[2:0]
Normal Watchdog Timeout Period:
000 = 6.25ms
001 = 25ms
010 = 100ms
011 = 400ms
100 = 1.6s
101 = 6.4s
110 = 25.6s
111 = 102.4s
[5:3]
Initial Watchdog Timeout Period (Immediately following power-up, reset
event, or enabling watchdog):
000 = 6.25ms
001 = 25ms
010 = 100ms
011 = 400ms
100 = 1.6s
101 = 6.4s
110 = 25.6s
111 = 102.4s
[6]
Watchdog Enable:
0 = Disables watchdog timer
1 = Enables watchdog timer
3Dh (watchdog 1)
3Fh (watchdog 2)
803Dh (watchdog 1)
803Fh (watchdog 2)
[7]
Not Used
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參數(shù)描述
MAX6872ETJ+ 功能描述:監(jiān)控電路 EEPROM-Prog Hex 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(guò)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
MAX6872ETJ+T 功能描述:監(jiān)控電路 EEPROM-Prog Hex 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(guò)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
MAX6872ETJ-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(guò)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
MAX6873ETJ 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(guò)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
MAX6873ETJ+ 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(guò)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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