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參數(shù)資料
| 型號： | LTC690CS8 |
| 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 MANAGEMENT CKT, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 141K |
| 代理商： | LTC690CS8 |
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
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC690CS8#PBF | 功能描述:IC MPU SUPERVISORY CIRCUIT 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 其它有關文件:STM6905 View All Specifications 標準包裝:1 系列:- 類型:多壓監(jiān)控器 監(jiān)視電壓數(shù)目:5 輸出:開路漏極或開路集電極 復位:低有效 復位超時:最小為 140 ms 電壓 - 閥值:2.188V，2.955V，可調，可調，可調 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:8-TSSOP 包裝:Digi-Reel® 產品目錄頁面:1197 (CN2011-ZH PDF) 其它名稱:497-8728-6 |
| LTC690CS8#PBF | 制造商:Linear Technology 功能描述:IC MPU SUPERVISOR 600 uA 5.5V 8-SOIC 制造商:Linear Technology 功能描述:IC, MPU SUPERVISOR, 600 uA, 5.5V, 8-SOIC |
| LTC690CS8#TR | 功能描述:IC MPU SUPERVISORY CIRCUIT 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標準包裝:1 系列:- 類型:簡單復位/加電復位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復位:高有效 復位超時:- 電壓 - 閥值:1.8V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-TSOP（0.059"，1.50mm 寬）5 引線 供應商設備封裝:5-TSOP 包裝:剪切帶 (CT) 其它名稱:NCP301HSN18T1GOSCT |
| LTC690CS8#TRPBF | 功能描述:IC MPU SUPERVISORY CIRCUIT 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標準包裝:1 系列:- 類型:簡單復位/加電復位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復位:高有效 復位超時:- 電壓 - 閥值:1.8V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-TSOP（0.059"，1.50mm 寬）5 引線 供應商設備封裝:5-TSOP 包裝:剪切帶 (CT) 其它名稱:NCP301HSN18T1GOSCT |
| LTC690CS8PBF | 制造商:Linear Technology 功能描述:Processor Supervisor 4.65V 4.65V SOIC8 |
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