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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： | 20/40页 |
| 文件大小： | 337K |
| 代理商： | MAX6874ETJ |
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MAX6874/MAX6875
EEPROM-Programmable, Hex/Quad,
Power-Supply Sequencers/Supervisors
______________________________________________________________________________________
27
Send Byte
The send byte protocol allows the master device to send
one byte of data to the slave device (see Figure 7). The
send byte presets a register pointer address for a sub-
sequent read or write. The slave sends a NACK instead
of an ACK if the master tries to send an address that is
not allowed. If the master sends 80h, 81h, or 82h, the
data is ACK. This could be start of the write byte/word
protocol, and the slave expects at least one further
data byte. If the master sends a stop condition, the
internal address pointer does not change. If the master
sends 84h, this signifies that the block read protocol is
expected, and a repeated start condition should follow.
The device reboots if the master sends 88h. The send
byte procedure follows:
1) The master sends a start condition.
2) The master sends the 7-bit slave address and a
write bit (low).
3) The addressed slave asserts an ACK on SDA.
4) The master sends an 8-bit data byte.
5) The addressed slave asserts an ACK on SDA.
6) The master sends a stop condition.
Write Byte/Word
The write byte/word protocol allows the master device
to write a single byte in the register bank, preset an
EEPROM (configuration or user) address for a subse-
quent read, or to write a single byte to the configuration
or user EEPROM (see Figure 7). The write byte/word
procedure follows:
1) The master sends a start condition.
2) The master sends the 7-bit slave address and a
write bit (low).
3) The addressed slave asserts an ACK on SDA.
4) The master sends an 8-bit command code.
5) The addressed slave asserts an ACK on SDA.
6) The master sends an 8-bit data byte.
7) The addressed slave asserts an ACK on SDA.
8) The master sends a stop condition or sends another
8-bit data byte.
9) The addressed slave asserts an ACK on SDA.
10) The master sends a stop condition.
To write a single byte to the register bank, only the 8-bit
command code and a single 8-bit data byte are sent.
The command code must be in the range of 00h to 45h.
The data byte is written to the register bank if the com-
mand code is valid. The slave generates a NACK at
step 5 if the command code is invalid.
To preset an EEPROM (configuration or user) address
for a subsequent read, the 8-bit command code and a
single 8-bit data byte are sent. The command code
must be 80h if the write is to be directed into the config-
uration EEPROM, or 81h or 82h, if the write is to be
directed into the user EEPROM. If the command code is
80h, the data byte must be in the range of 00h to 45h. If
the command code is 81h or 82h, the data byte can be
00h to FFh. A NACK is generated in step 7 if none of the
above conditions are true.
To write a single byte of data to the user or configuration
EEPROM, the 8-bit command code and a single 8-bit
data byte are sent. The following 8-bit data byte is writ-
ten to the addressed EEPROM location.
SDA
SCL
1
MSB
LSB
START
01
0
A1
(0)
A0
XR/W
ACK
(MAX6875 ONLY)
Figure 6. Slave Address
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 |
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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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