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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： | 24/40页 |
| 文件大小： | 337K |
| 代理商： | MAX6874ETJ |
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MAX6874/MAX6875
EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
30
______________________________________________________________________________________
For the configuration EEPROM, valid address pointers
range from 8000h to 8045h. Registers 8046h to 804Fh
are reserved and should not be overwritten. Register
addresses from 8050h to 80FFh return a NACK from
the MAX6874/MAX6875. When using the block write
protocol, the address pointer automatically increments
after each data byte, except when the address pointer
is already at 8045h. If the address pointer is already
8045h, and more data bytes are being sent, these sub-
sequent bytes overwrite address 8045h repeatedly,
leaving only the last data byte sent stored at this regis-
ter address.
For the user EEPROM, valid address pointers range
from 8100h to 81FFh and 8200h to 82FFh. Block write
and block read protocols allow the address pointer to
reset (to 8100h or 8200h) when attempting to write or
read beyond 81FFh or 82FFh.
Configuration EEPROM
The configuration EEPROM addresses range from 8000h
to 8045h. Write data to the configuration EEPROM to
automatically set up the MAX6874/MAX6875 upon power-
up. Data transfers from the configuration EEPROM to the
configuration registers when ABP exceeds UVLO during
power-up or after a software reboot. After ABP exceeds
UVLO, an internal 1MHz clock starts after a 5s delay,
and data transfer begins. Data transfer disables access
to the configuration registers and EEPROM. The data
transfer from EEPROM to configuration registers takes
3.5ms (max). Read configuration EEPROM data at any
time after power-up or software reboot. Write commands
to the configuration EEPROM are allowed at any time
after power-up or software reboot, unless the configura-
tion lock bit is set (see Table 20). The maximum cycle
time to write a single byte is 11ms (max).
User EEPROM
The 512 byte user EEPROM addresses range from
8100h to 82FFh (see Figure 7). Store software-revision
data, board-revision data, and other data in these reg-
isters. The maximum cycle time to write a single byte is
11ms (max).
Configuration Register Bank and EEPROM
The configuration registers can be directly modified by
the serial interface without modifying the EEPROM after
the power-up procedure terminates and the configura-
tion EEPROM data has been loaded into the configura-
tion register bank. Use the write byte or block write
protocols to write directly to the configuration registers.
Changes to the configuration registers take effect
immediately and are lost upon power removal.
At device power-up, the register bank loads configura-
tion data from the EEPROM. Configuration data may be
directly altered in the register bank during application
development, allowing maximum flexibility. Transfer the
new configuration data, byte by byte, to the configura-
tion EEPROM with the write byte protocol. The next
device power-up or software reboot automatically loads
the new configuration.
REGISTER
ADDRESS
EEPROM
MEMORY
ADDRESS
READ/
WRITE
DESCRIPTION
00h
8000h
R/W
IN1 undervoltage detector threshold (Table 2).
01h
8001h
R/W
IN2 undervoltage detector threshold (Table 3).
02h
8002h
R/W
IN3 undervoltage detector threshold (Table 4).
03h
8003h
R/W
IN4 undervoltage detector threshold (Table 4).
04h
8004h
R/W
IN5 undervoltage detector threshold (MAX6874 only) (Table 4).
05h
8005h
R/W
IN6 undervoltage detector threshold (MAX6874 only) (Table 4).
06h
8006h
—
Not used.
07h
8007h
—
Not used.
08h
8008h
—
Not used.
09h
8009h
—
Not used.
0Ah
800Ah
—
Not used.
Table 17. Register Map
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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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