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参数资料
| 型号： | LTC695IN-3.3#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP16 |
| 封装： | 0.300 INCH, LEAD FREE, PLASTIC, DIP-16 |
| 文件页数： | 7/20页 |
| 文件大小： | 189K |
| 代理商： | LTC695IN-3.3#TRPBF |
LTC694-3.3/LTC695-3.3
15
69453fb
TYPICAL APPLICATION
Capacitor Back-Up with 74HC4016 Switch
TYPICAL APPLICATION
R1
10k
R2
30k
0.1μF
14
12
11
10
1
7
100μF
13
2
3.3V
VCC
VOUT
VBATT
74HC4016
694/5-3.3 TA03
LOW LINE
GND
LTC695-3.3
+
Table 2. LTC695-3.3 Reset Active Time and Watchdog Timeout Selections
OSC SEL
OSC IN
WATCHDOG TIMEOUT PERIOD
RESET ACTIVE TIME
NORMAL (SHORT PERIOD)
IMMEDIATELY AFTER
RESET (LONG PERIOD)
LTC695-3.3
Low
External Clock Input
1024 CLKs
4096 CLKs
2048 CLKs
Low
External Capacitor*
400ms
70pF
C
1.6s
70pF
C
800ms
70pF
C
Floating or High
Low
100ms
1.6 sec
200ms
Floating or High
1.6 sec
200ms
*The nominal internal frequency is 10.24kHz. The nominal oscillator frequency with external capacitor is fOSC (Hz) =
184,000
C(pF) 1025
the internal oscillator is enabled and the reset active time
is fixed at 140ms minimum for the LTC695-3.3. OSC IN
selects between the 1 second and 70ms minimum normal
watchdog timeout periods. In both cases, the timeout period
immediately after a reset is at least 1 second.
Push-Button Reset
The LTC694-3.3/LTC695-3.3 do not provide a logic input
for direct connection to a push-button. However, a push-
button in series with a 100Ω resistor connected to the
RESET output pin (Figure 13) provides an alternative for
manual reset. Connecting a 0.1μF capacitor to the RESET
pin debounces the push-button input.
The 100Ω resistor in series with the push-button is re-
quired to prevent the ringing, due to the capacitance and
lead inductance, from pulling the RESET pins of the MPU
and LTC69X below ground.
3.3V
100Ω
VCC
LTC694-3.3
LTC695-3.3
GND
694/5-3.3 F13
RESET
0.1μF
MPU
(e.g. 68HC05)
RESET
Figure 13. The External Push-Button Reset
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC695INPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
| LTC695IN-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
| LTC695IS | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Supply Supervisor |
| LTC695IS-3.3 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Supply Supervisor |
| LTC695ISW | 功能描述:IC MPU SUPERVISRY CIRCUIT 16SOIC 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 |
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