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參數(shù)資料
| 型號： | LTC693IS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Microprocessor Supervisory Circuits |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | PLASTIC, SOL-16 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 308K |
| 代理商： | LTC693IS |
14
LTC692/LTC693
Low
External Clock Input
1024
clks
400ms
×
C
47pF
4096
clks
1.6 sec
×
C
47pF
2048
clks
800ms
×
C
47pF
Low
External Capacitor*
Floating or High
Floating or High
Low
100ms
1.6 sec
1.6 sec
1.6 sec
200ms
200ms
Floating or High
U
S
A
O
PPLICATI
U
U
OSC IN
OSC SEL
*The nominal internal frequency is 10.24kHz. The nominal oscillator frequency with external capacitor is F
OSC
(Hz) =
Pushbutton Reset
The LTC692/LTC693 do not provide a logic input for direct
connection to a pushbutton. However, a pushbutton 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 pushbutton input.
The 100
resistor in series with the pushbutton is re-
quired to prevent the ringing, due to the capacitance and
lead inductance, from pulling the RESET pins of the MPU
and LTC692/LT693 below ground.
Figure 13. The External Pushbutton Reset
184,000
C(pF)
WATCHDOG TIME-OUT PERIOD
RESET ACTIVE TIME
IMMEDIATELY
AFTER RESET
(Long Period)
NORMAL
(Short Period)
LTC693
Table 2. LTC693 Reset Active Time and Watchdog Time-Out Selections
5V
100
V
CC
LTC692
LTC693
GND
LTC692/3 F13
RESET
0.1
μ
F
MPU
(e.g. 6805)
RESET
U
S
A
O
PPLICATI
TYPICAL
Capacitor Backup with 74HC4016 Switch
R1
10k
R2
30k
0.1
μ
F
0.1
μ
F
+
14
12
11
10
1
7
100
μ
F
13
2
5V
V
CC
V
OUT
V
BATT
74HC4016
LTC692/3 TA3
LOW LINE
GND
LTC693
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| LTC692IS8 | Microprocessor Supervisory Circuits |
| LTC693C | Microprocessor Supervisory Circuits |
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