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参数资料
| 型号： | MAX6876ETX+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/39页 |
| 文件大小： | 0K |
| 描述： | IC TRACKER/SUPERVISOR MON 36TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 序列发生器 |
| 监视电压数目： | 4 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 供应商设备封装： | 36-TQFN 裸露焊盘（6x6） |
| 包装： | 管件 |
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EEPROM-Programmable, Quad,
Power-Supply Tracker/Sequencer Circuit
Table 7. Program ENABLE
REGISTER
ADDRESS
EEPROM MEMORY
ADDRESS
BIT RANGE
DESCRIPTION
Bit 1 — If 1, check ENABLE with I 2 C enable control bit
If 0, ignore ENABLE with I 2 C
09h
29h
[1:0]
Bit 0 — If 0, enable with I 2 C = 0, I 2 C enable command bit
If 1, enable with I 2 C = 1
Table 8. Select External Reference
REGISTER
ADDRESS
11h
EEPROM MEMORY
ADDRESS
31h
BIT RANGE
0
DESCRIPTION
Bit 0 — If 1, selects external reference; 0 selects internal reference
command (Table 7). If a latch-on fault mode is chosen,
a toggle on the internal enable clears the latch condi-
tion and restarts the device after a fault condition
(Figure 7).
TRKEN
ENABLE
INTERNAL
ENABLE
Reference Voltage Input (REFIN)
The MAX6876 features an internal +1.25V voltage refer-
ence. The voltage reference sets the threshold of the
voltage detectors. Leave REFIN unconnected when
using the internal reference. REFIN accepts an external
V TRKEN
reference in the +1.225V to +1.275V range. Use Table
8 commands to select the external reference.
I 2 C ENABLE CONTROL BIT
(RAM REGISTER)
1 = YES
I 2 C ENABLE COMMAND BIT
(RAM REGISTER)
0 = OFF
09h[1]
0 = NO
1 = ON
09h[0]
Track Enable Input (TRKEN)
The track enable (TRKEN) monitor input is another fea-
ture of the MAX6876. To enable voltage-tracking
power-up operation, drive TRKEN higher than 1.285V.
When TRKEN goes below 1.25V, OUT_ outputs start
tracking down. Connect TRKEN to an external resistor-
divider network to set the desired monitor threshold.
Connect TRKEN to ABP if not used.
SYNCH
The MAX6876 provides selectable tracking synchro-
nization output or input (SYNCH). SYNCH allows track-
ing of up to 16 power supplies on the same I 2 C bus.
One device is programmed as the SYNCH master and
the other devices are programmed as slaves. SYNCH
of the master device outputs the common ramp voltage
to which all OUT_ voltages are tracked. The SYNCH
pins of the slave devices are inputs for the ramp control
voltage (no internal ramp is generated in the slave
devices) (see Table 1).
Figure 7. Logic ENABLE
Monitored Outputs
OUT1–OUT4
The MAX6876 monitors four OUT_ outputs to control
the tracking/sequencing performance. After the internal
supply (ABP) exceeds the minimum voltage (2.7V)
requirements, TRKEN > 1.25V, the internal ENABLE
input is logic high, and IN1 – IN4 are all within their
selected thresholds, OUT1 – OUT4 will begin to track or
sequence.
During power-up mode, the MAX6876 drives the gates
of the external n-channel FETs to force the OUT_ volt-
ages to track the internally set ramp voltage. If OUT_
voltages vary from the ramp voltage by more than
±125mV, an internal comparator signals an alert that
dynamically adjusts the ramp voltage (stops the ramp
until the slow OUT_ catches up). During power-down
mode, an internal pulldown resistor (100 ? ) on OUT_
can be enabled to help discharge load capacitance.
______________________________________________________________________________________
21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6876ETX+ | 功能描述:监控电路 EEPROM-Prog Quad 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 |
| MAX6876ETX+T | 功能描述:监控电路 EEPROM-Prog Quad 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 |
| MAX6876ETX-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 |
| MAX6876EVCMOD2 | 功能描述:监控电路 Programmers, Development Systems 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 |
| MAX6876EVKIT | 功能描述:监控电路 Programmers, Development Systems 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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