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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： | 17/40页 |
| 文件大小： | 337K |
| 代理商： | MAX6874ETJ |
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MAX6874/MAX6875
EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
24
______________________________________________________________________________________
ured by the user). To configure the MAX6874/ MAX6875,
first apply an input voltage to IN1 or one of IN3–IN5
(MAX6874)/IN3–IN4 (MAX6875) (see the Powering the
MAX6874/MAX6875 section). VIN1 > +4V or one of
VIN3–VIN5 > +2.7V, to ensure device operation. Next,
transmit data through the serial interface. Use the block
write protocol to quickly configure the device. Write to
the configuration registers first to ensure the device is
configured properly. After completing the setup proce-
dure, use the read word protocol to verify the data from
the configuration registers. Lastly, use the write word
protocol to write this data to the EEPROM registers. After
completing EEPROM register configuration, apply full
power to the system to begin normal operation. The non-
volatile EEPROM stores the latest configuration upon
removal of power. Write 0’s to all EEPROM registers to
clear the memory.
Software Reboot
A software reboot allows the user to restore the
EEPROM configuration to the volatile registers without
cycling the power supplies. Use the send byte com-
mand with data byte 88h to initiate a software reboot.
The 3.5ms (max) power-up delay also applies after a
software reboot.
SMBus/I2C-Compatible Serial Interface
The MAX6874/MAX6875 feature an I2C/SMBus-compati-
ble serial interface consisting of a serial data line (SDA)
and a serial clock line (SCL). SDA and SCL allow bidirec-
tional communication between the MAX6874/MAX6875
and the master device at clock rates up to 400kHz.
Figure 2 shows the interface timing diagram. The
MAX6874/MAX6875 are transmit/receive slave-only
devices, relying upon a master device to generate a
clock signal. The master device (typically a microcon-
troller) initiates data transfer on the bus and generates
SCL to permit that transfer.
AFFECTED OUTPUTS
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
BIT RANGE
MAX6874
MAX6875
DESCRIPTION
11h
8011h
[3:1]
PO1
—
15h
8015h
[3:1]
PO2
—
1Ch
801Ch
[4:2]
PO3
PO1
23h
8023h
[4:2]
PO4
PO2
2Ah
802Ah
[3:1]
PO5
PO3
31h
8031h
[3:1]
PO6
PO4
35h
8035h
[3:1]
PO7
PO5
39h
8039h
[3:1]
PO8
—
000 = 25s
001 = 1.5625ms
010 = 6.25ms
011 = 25ms
100 = 50ms
101 = 200ms
110 = 400ms
111 = 1600ms
Table 16. PO_ Timeout Periods
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
BIT
RANGE
DESCRIPTION
[0]
PO1 (MAX6874 only). 0 = active low, 1 = active high.
[1]
PO2 (MAX6874 only). 0 = active low, 1 = active high.
[2]
PO3 (MAX6874)/PO1 (MAX6875). 0 = active low, 1 = active high.
[3]
PO4 (MAX6874)/PO2 (MAX6875). 0 = active low, 1 = active high.
[4]
PO5 (MAX6874)/PO3 (MAX6875). 0 = active low, 1 = active high.
[5]
PO6 (MAX6874)/PO4 (MAX6875). 0 = active low, 1 = active high.
[6]
PO7 (MAX6874)/PO5 (MAX6875). 0 = active low, 1 = active high.
3Ah
803Ah
[7]
PO8 (MAX6874 only). 0 = active low, 1 = active high.
Table 15. Programmable Output Active States
相关PDF资料 |
PDF描述 |
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| MAX6876ETX | EEPROM-Programmable, Quad, Power-Supply Tracker/Sequencer Circuit |
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| MAX6884ETP-T | EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC |
| MAX6885ETP | EEPROM-Programmable, Hex, Power-Supply Supervisors with an ADC |
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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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