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参数资料
| 型号： | LTC691CSW#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC MPU SUPERVISRY CIRCUIT 16SOIC |
| 标准包装： | 1,000 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 35 ms |
| 电压 - 阀值： | 4.65V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
LTC690/LTC691
LTC694/LTC695
PIN FUNCTIONS
PFO : Power Failure Output from C3. PFO remains high
when PFI is above 1.3V and goes low when PFI is below
1.3V. When V CC is lower than V BATT , C3 is shut down and
PFO is forced low.
RESET : Logic Output for μP Reset Control. Whenever
V CC falls below either the reset voltage threshold (4.65V,
typically) or V BATT , RESET goes active low. After V CC returns
to 5V, reset pulse generator forces RESET to remain active
low for a minimum of 35ms for the LTC690 /LTC691 (140ms
for the LTC694/LTC695). When the watchdog timer is
enabled but not serviced prior to a preset timeout period,
reset pulse generator also forces RESET to active low for
a minimum of 35ms for the LTC690/LTC691 (140ms for
the LTC694/5) for every preset timeout period (see Figure
11). The reset active time is adjustable on the LTC691/
LTC695. An external pushbutton reset can be used in
connection with the RESET output. See Pushbutton Reset
in Applications Information section.
RESET: RESET is an active high logic output. It is the
inverse of RESET .
LOW?LINE : Logic Output from Comparator C1. LOW?LINE
indicates a low line condition at the V CC input. When V CC
falls below the reset voltage threshold (4.65V typically),
LOW?LINE goes low. As soon as V CC rises above the reset
voltage threshold, LOW?LINE returns high (see Figure 1).
LOW?LINE goes low when V CC drops below V BATT (see
Table 1).
WDI: Watchdog Input, WDI, is a three level input. Driving
WDI either high or low for longer than the watchdog timeout
period, forces both RESET and WDO low. Floating WDI
disables the watchdog timer. The timer resets itself with
each transition of the watchdog input (see Figure 11).
WDO : Watchdog Logic Output. When the watchdog input
remains either high or low for longer than the watchdog
timeout period, WDO goes low. WDO is set high whenever
there is a transition on the WDI pin, or LOW?LINE goes
low. The watchdog timer can be disabled by floating WDI
(see Figure 11).
CE IN: Logic input to the Chip?Enable gating circuit. CE IN
can be derived from microprocessor’s address line and/
or decoder output. See Applications Information section
and Figure 5 for additional information.
CE OUT: Logic Output on the Chip?Enable Gating Circuit.
When V CC is above the reset voltage threshold, CE OUT is
a buffered replica of CE IN. When V CC is below the reset
voltage threshold CE OUT is forced high (see Figure 5).
OSC SEL: Oscillator Selection Input. When OSC SEL is
high or floating, the internal oscillator sets the reset active
time and watchdog timeout period. Forcing OSC SEL low,
allows OSC IN be driven from an external clock signal or
external capacitor be connected between OSC IN and GND.
OSC IN: Oscillator Input. OSC IN can be driven by an external
clock signal or external capacitor can be connected between
OSC IN and GND when OSC SEL is forced low. In this
configuration the nominal reset active time and watchdog
timeout period are determined by the number of clocks or
set by the formula (see Applications Information section).
When OSC SEL is high or floating, the internal oscillator is
enabled and the reset active time is fixed at 50ms typical
for the LTC691 and 200ms typical for the LTC695. OSC
IN selects between the 1.6 seconds and 100ms typical
watchdog timeout periods. In both cases, the timeout
period immediately after a reset is 1.6 seconds typical.
690ff
For more information www.linear.com/690
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC691I | 制造商:LINER 制造商全称:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
| LTC691IN | 功能描述:IC MPU SUPERVISORY CIRCUIT 16DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| LTC691IN#PBF | 功能描述:IC MPU SUPERVISORY CIRCUIT 16DIP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| LTC691INPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
| LTC691IN-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
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