參數(shù)資料
型號： MAX6889ETJ+
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 電源管理
英文描述： EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors
中文描述： 8-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC32
封裝： 5 X 5 MM, TQFN-32
文件頁數(shù)： 30/40頁
文件大?。?/td> 255K
代理商： MAX6889ETJ+
MAX6889/MAX6890/MAX6891
EEPROM-Programmable, Octal/Hex/Quad,
Power-Supply Sequencers/Supervisors
36
______________________________________________________________________________________
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
READ/
WRITE
DESCRIPTION
00h
80h
R/W
IN1 undervoltage detector threshold (Table 2)
01h
81h
R/W
IN2 undervoltage detector threshold (Table 3)
02h
82h
R/W
IN3 undervoltage detector threshold (Table 3)
03h
83h
R/W
IN4 undervoltage detector threshold (Table 3)
04h
84h
R/W
IN5 undervoltage detector threshold (MAX6889/MAX6890 only) (Table 3)
05h
85h
R/W
IN6 undervoltage detector threshold (MAX6889/MAX6890 only) (Table 3)
06h
86h
R/W
IN7 undervoltage detector threshold (MAX6889 only) (Table 3)
07h
87h
R/W
IN8 undervoltage detector threshold (MAX6889 only) (Table 4)
08h
88h
R/W
Threshold range selection (Tables 2, 3, and 4)
09h
89h
R/W
High-Z mode selection (Tables 2, 3, and 4)
0Ah
8Ah
R/W
PO1 input selection (Table 7)
0Bh
8Bh
R/W
PO1 input selection (Table 7)
0Ch
8Ch
R/W
PO1 timeout period, programmable output polarity, and output type selection
(Tables 17, 18, and 19)
0Dh
8Dh
R/W
PO2 input selection (Table 8)
0Eh
8Eh
R/W
PO2 input selection (Table 8)
Register Map
4) Any attempt to communicate with the device prior to
this download completion results in a NACK being
issued from the MAX6889/MAX6890/MAX6891.
Forcing Programmable Outputs High
During Power-up
A weak, 10A pulldown current holds all programmable
outputs low during power-up until VCC exceeds the
undervoltage-lockout (UVLO) threshold. Applications
requiring a guaranteed high programmable output for
VCC down to GND require external pullup resistors to
maintain the logic state until VCC exceeds UVLO. Use
20k
resistors for most applications.
Uses for General-Purpose Inputs (GPI_)
Watchdog Timer
Program GPI_ as an input to the watchdog timer in the
MAX6889/MAX6890/MAX6891. The GPI_ input must
toggle within the watchdog timeout period; otherwise
any programmable output dependent on the watchdog
timer will assert.
Additional Manual Reset Functions
The programmable outputs allow a set of conditions to
assert the output. Program the set of conditions to
depend on one of the GPI_ inputs. Any output that
depends on GPI_ asserts when GPI_ is held in its
active state, effectively acting as a manual reset input.
Other Fault Signals from C
Connect a general-purpose output from a C to one of
the GPI_ inputs to allow interrupts to assert any output
of the MAX6889/MAX6890/MAX6891. Configure one of
the programmable outputs to assert on whichever GPI_
input connects to the general-purpose output of the C.
Layout and Bypassing
For better noise immunity, bypass each of the voltage
detector inputs to GND with 0.1F capacitors installed
as close to the device as possible. Bypass VCC and
DBP to GND with 1F capacitors installed as close to the
device as possible. VCC (when not externally supplied)
and DBP are internally generated voltages and should
not be used to supply power to external circuitry.
Configuration Latency Period
A delay of less than 5s occurs between writing to the
configuration registers and the time when these
changes actually take place, unless when changing
one of the voltage detector’s thresholds. Changing a
voltage detector threshold typically takes 150s. When
changing EEPROM contents, a software reboot or
cycling of power is required for these changes to trans-
fer to volatile memory.
Chip Information
PROCESS: BiCMOS
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6889ETJ+ 功能描述:監(jiān)控電路 EEPROM-Prog Octal Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 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
MAX6889ETJ+T 功能描述:監(jiān)控電路 EEPROM-Prog Octal Power-Sup Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 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
MAX6889ETJ-T 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 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
MAX6889EVCMAXQ 功能描述:監(jiān)控電路 EEPROM-Programmable Octal/Hex/Quad Power-Supply Sequencers/Supervisors RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 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
MAX6889EVCMAXQU 功能描述:監(jiān)控電路 Evaluation Kit/Evaluation System for the MAX6889 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 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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