- 您现在的位置：买卖IC网 > PDF目录13528 > MAX6365LKA26+T (Maxim Integrated Products)IC SUPERVISOR MPU LP SOT23-8 PDF资料下载
参数资料
| 型号： | MAX6365LKA26+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/15页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU LP SOT23-8 |
| 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，图腾柱 |
| 复位： | 低有效 |
| 复位超时： | 最小为 150 ms |
| 电压 - 阀值： | 2.63V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 带卷 (TR) |
SOT23, Low-Power μP Supervisory Circuits
with Battery Backup and Chip-Enable Gating
WDI
t WD
t RP
t WD
t RP
RESET
t WD = WATCHDOG TIMEOUT PERIOD
t RP = RESET TIMEOUT PERIOD
Figure 2. MAX6366 Watchdog Timeout Period and Reset Active Time
Watchdog Input (MAX6366 Only)
The watchdog monitors μP activity through the watch-
dog input (WDI). If the μP becomes inactive, reset
asserts. To use the watchdog function, connect WDI to
a bus line or μP I/O line. A change of state (high to low,
low to high, or a minimum 100ns pulse) resets the
watchdog timer. If WDI remains high or low for longer
than the watchdog timeout period (t WD ), the internal
watchdog timer runs out and a reset pulse is triggered
for the reset timeout period (t RP ). The internal watchdog
timer clears whenever reset asserts or whenever WDI
sees a rising or falling edge. If WDI remains in either a
high or low state, a reset pulse asserts periodically after
every t WD (Figure 2).
BATT ON Indicator (MAX6367 Only)
BATT ON is a push-pull output that drives high when in
battery-backup mode. BATT ON typically sinks 3.2mA
at 0.1V saturation voltage. In battery-backup mode, this
terminal sources approximately 10μA from OUT. Use
BATT ON to indicate battery-switchover status or to
supply base drive to an external pass transistor for
higher current applications (Figure 3).
RESET IN Comparator (MAX6368 Only)
RESET IN is compared to an internal 1.235V reference.
If the voltage at RESET IN is less than 1.235V, reset
asserts. Use the RESET IN comparator as an undervolt-
age detector to signal a failing power supply or as a
secondary power-supply reset monitor.
To program the reset threshold (V RTH ) of the secondary
power supply, use the following (see Typical Operating
Circuit):
V RTH = V REF (R1 / R2 + 1)
where V REF = 1.235V. To simplify the resistor selection,
choose a value for R2 and calculate R1:
R1 = R2 [(V RTH / V REF ) - 1]
Since the input current at RESET IN is 25nA (max),
large values (up to 1M ? ) can be used for R2 with no
significant loss in accuracy. For example, in the Typical
Operating Circuit, the MAX6368 monitors two supply
voltages. To monitor the secondary 5V logic or analog
supply with a 4.60V nominal programmed reset thresh-
old, choose R2 = 100k ? , and calculate R1 = 273k ? .
Reset Output
A μP’s reset input starts the μP in a known state. The
MAX6365–MAX6368 μP supervisory circuits assert a
reset to prevent code-execution errors during power-
up, power-down, and brownout conditions. RESET is
guaranteed to be a logic low or logic high, depending
on the device chosen (see the Ordering Information).
RESET or RESET asserts when V CC is below the reset
threshold and for at least 150ms (t RP ) after V CC rises
above the reset threshold. RESET or RESET also
asserts when MR is low (MAX6365) and when RESET IN
is less than 1.235V (MAX6368). The MAX6366 watch-
dog function will cause RESET (or RESET ) to assert in
pulses following a watchdog timeout (Figure 2).
Applications Information
Operation Without
a Backup Power Source
The MAX6365–MAX6368 provide battery-backup func-
tions. If a backup power source is not used, connect
BATT to GND and OUT to V CC .
10
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| 35NXA470MEFC12.5X25 | CAP ALUM 470UF 35V 20% BI-P RAD |
| RCB30DHRN | CONN CARD EXTEND 60POS .050" |
| MAX6365HKA23+T | IC SUPERVISOR MPU LP SOT23-8 |
| RCB30DHRD | CONN CARD EXTEND 60POS .050" |
| VI-2ND-EX-F3 | CONVERTER MOD DC/DC 85V 75W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6365LKA29 | 制造商:Maxim Integrated Products 功能描述:LOW-POWER UP SUPERVISORY ICS WITH BATTERY BAC - Cut Tape Product |
| MAX6365LKA29+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.93V 15UA 8PIN SOT-23 - Rail/Tube |
| MAX6365LKA29+T | 功能描述:监控电路 uPower 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 |
| MAX6365LKA29-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 |
| MAX6365LKA31 | 制造商:Maxim Integrated Products 功能描述:LOW-POWER UP SUPERVISORY ICS WITH B - Cut Tape Product |
发布紧急采购，3分钟左右您将得到回复。