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參數(shù)資料
| 型號(hào)： | 522930F |
| 英文描述： | Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits |
| 中文描述： | 集成電路MICROPROZESSOR監(jiān)控電路 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 141K |
| 代理商： | 522930F |
14
LTC 690/LTC 691
LTC 694/LTC 695
Low
External Clock Input
1024 clks
400ms
C
70pF
4096 clks
1.6 sec
C
70pF
512 clks
200ms
C
70pF
2048 clks
800ms
C
70pF
Low
External Capacitor*
Floating or High
Floating or High
Low
100ms
1.6 sec
1.6 sec
1.6 sec
50ms
50ms
200ms
200ms
Floating or High
U
S
A
O
PPLICATI
U
U
IMMEDIATELY
AFTER RESET
(Long Period)
NORMAL
(Short Period)
WATCHDOG TIME-OUT PERIOD
RESET ACTIVE TIME
LTC691
LTC695
OSC IN
OSC SEL
Table 2. LTC691 and LTC695 Reset Active Time and Watchdog Time-Out Selections
Figure 13. The External Push-Button Reset
Figure 14. The External Push-Button Reset with the LTC1235
Push-Button Reset
The LTC690 family does not provide a logic input for direct
connection to a pushbutton. However, a push-button in
series with a 100
resistor connected to the RESET output
pin (Figure 13) provides an alternative for manual reset.
Connecting a 0.1
μ
F capacitor to the RESET pin debounces
the push-button input.
The 100
resistor in series with the push-button is
required to prevent the ringing, due to the capacitance and
lead inductance, from pulling the RESET pins of the MPU
and LTC69X below ground.
If a dedicated pushbutton reset input is desired, the
LTC1235 is a good choice (Figure 14). It has all the
functions of the LTC695 and provides push-button reset
as an extra feature. Its push-button is internally debounced
and invokes the normal 200ms reset sequence. This
eliminates the need for the 100
resistor and 0.1
μ
F
capacitor. It also provides a more consistent reset pulse.
5V
100
V
CC
LTC690/LTC691
LTC694/LTC695
GND
690 F13
RESET
0.1
μ
F
MPU
(e.g. 6805)
RESET
5V
V
CC
LTC1235
GND
690 F14
RESET
MPU
(e.g. 6805)
RESET
PBRST
*The nominal internal frequency is 10.24kHz. The nominal oscillator frequency with external capacitor is f
OSC
(Hz) =
184,000
C(pF) 1025
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 522931D | Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits |
| 522932B | Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits |
| 522933X | IC |
| 522935G | Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits |
| 522936E | IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 522-93-100-10-000001 | 功能描述:SKT PGA WRAPOST 制造商:mill-max manufacturing corp. 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:50 |
| 522-93-100-10-000002 | 功能描述:SKT PGA WRAPOST 制造商:mill-max manufacturing corp. 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:50 |
| 522-93-100-10-000003 | 功能描述:SKT PGA WRAPOST 制造商:mill-max manufacturing corp. 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:50 |
| 522-93-100-13-061001 | 功能描述:SKT PGA WRAPOST 制造商:mill-max manufacturing corp. 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:50 |
| 522-93-100-13-061002 | 功能描述:SKT PGA WRAPOST 制造商:mill-max manufacturing corp. 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:50 |
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