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参数资料
| 型号： | MAX691AESE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/17页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 备用电池电路 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 4.65V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
Microprocessor Supervisory Circuits
+5V
+5V
VBATT
V CC
VBATT
V CC
2.8V
CE IN
MAX691A
MAX693A
MAX800L
MAX800M
CE OUT
2.0V to 5.5V
PFI
MAX691A
MAX693A
MAX800L PFO
MAX800M
LOW BATT
50 Ω
OUTPUT
GND
C LOAD
GND
IMPEDANCE
Figure 6. CE Propagation Delay Test Circuit
Table 2. Input and Output Status in Battery-Backup
Mode
Figure 7. Low-Battery Indicator
Power-Fail Output
The Power-Fail Output ( PFO ) goes low when PFI goes
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
NAME
VBATT
V OUT
V CC
GND
BATT ON
LOWLINE
OSC IN
OSC SEL
PFI
PFO
WDI
CE OUT
CE IN
WDO
RESET
RESET
STATUS
Supply current is 1μA max.
V OUT is connected to VBATT through an
internal PMOS switch.
Battery switchover comparator monitors
V CC for active switchover.
GND 0V, 0V reference for all signals.
Logic high. The open-circuit output is
equal to V OUT .
Logic low*
OSC IN is ignored.
OSC SEL is ignored.
The power-fail comparator remains
active in the battery-backup mode for
V CC ≥ VBATT - 1.2V typ.
The power-fail comparator remains
active in the battery-backup mode for
V CC ≥ VBATT - 1.2V typ. Below this volt-
age, PFO is forced low.
Watchdog is ignored.
Logic high. The open-circuit voltage is
equal to V OUT .
High impedance
Logic high. The open-circuit voltage is
equal to V OUT .
Logic low*
High impedance*
below 1.25V. It typically sinks 3.2mA with a saturation
voltage of 0.1V. With PFI above 1.25V, PFO is actively
pulled to V OUT .
Battery-Backup Mode
Two conditions are required to switch to battery-back-
up mode: 1) V CC must be below the reset threshold,
and 2) V CC must be below VBATT. Table 2 lists the sta-
tus of the inputs and outputs in battery-backup mode.
Battery-On Output
The Battery-On (BATT ON) output indicates the status
of the internal V CC /battery-switchover comparator,
which controls the internal V CC and VBATT switches.
For V CC greater than VBATT (ignoring the small hys-
teresis effect), BATT ON typically sinks 3.2mA at 0.1V
saturation voltage. In battery-backup mode, this termi-
nal sources approximately 10μA from V OUT . Use BATT
ON to indicate battery-switchover status or to supply
base drive to an external pass transistor for higher-cur-
rent applications (see Typical Operating Circuit).
Input Supply Voltage
The Input Supply Voltage (V CC ) should be a regulated
5V. V CC connects to V OUT via a parallel diode and a
large PMOS switch. The switch carries the entire cur-
rent load for currents less than 250mA. The parallel
diode carries any current in excess of 250mA. Both the
switch and the diode have impedances less than 1 Ω
each. The maximum continuous current is 250mA, but
power-on transients may reach a maximum of 1A.
* V CC must be below the reset threshold to enter battery-backup
mode.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX691AEUE | 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 |
| MAX691AEUE+ | 功能描述:监控电路 MPU Supervisor 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 |
| MAX691AEUE+T | 功能描述:监控电路 MPU Supervisor 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 |
| MAX691AEUE-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 |
| MAX691AEWE | 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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