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参数资料
| 型号： | MAX6891ETP |
| 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： | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC20 |
| 封装： | 5 X 5 MM, TQFN-20 |
| 文件页数： | 30/40页 |
| 文件大小： | 255K |
| 代理商： | MAX6891ETP |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX6891ETP-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 |
| MAX6892ETJ | 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 |
| MAX6892ETJ+ | 功能描述:监控电路 Pin-Selectable Octal 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 |
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