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參數資料
| 型號： | MB3793-27APNF |
| 廠商： | FUJITSU LTD |
| 元件分類： | 電源管理 |
| 英文描述： | Circular Connector; No. of Contacts:128; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封裝： | PLASTIC, SO-8 |
| 文件頁數： | 11/23頁 |
| 文件大小： | 173K |
| 代理商： | MB3793-27APNF |
11
MB3793
-27A
5.
Clock pulse input supplementation (Positive clock pulse)
I
OPERATION SEQUENCE
1.
Positive clock pulse input
See “1. Basic operation (positive clock pulse)” under “
I
DIAGRAM.”
2.
Negative clock pulse input
See “2. Basic operation (negative clock pulse)” under “
I
DIAGRAM.”
The MB3793 operates in the same way whether it inputs positive or negative pulses.
3.
Clock monitoring
To use the MB3793 while monitoring only one clock, connect clock pins CK1 and CK2.
Although the MB3793 operates basically in the same way as when monitoring two clocks, it monitors the clock
signal at every other input pulse.
See “3. Single-clock input monitoring (positive clock pulse)” under “
I
DIAGRAM.”
4.
Description of Operations
The numbers given to the following items correspond to numbers (1) to (13) used in “
I
DIAGRAM.”
(1) The MB3793 outputs a reset signal when the supply voltage (V
CC
) reaches about 0.8 V (V
CCL
)
(2) If V
CC
reaches or exceeds the rise-time detected voltage V
SH
, the MB3793 starts charging the power-on
reset hold time setting capacitor C
TP
. At this time, the output remains in a reset state. The V
SH
value is about
2.76 V.
(3) When C
TP
has been charged for a certain period of time T
PR
(until the CTP pin voltage exceeds the threshold
voltage (V
th
) after the start of charging), the MB3793 cancels the reset (setting the RESET pin to “H” level
from “L” level).
CTW
CK1
*1
*2
CK2
V
H
V
L
Note:
The MB3793 watchdog timer monitors Clock1 (CK1) and Clock2 (CK2) pulses alternately.
When a CK2 pulse is detected after detecting a CK1 pulse, the monitoring time setting capacity (C
TW
) switches to
charging from discharging.
When two consecutive pulses occur on one side of this alternation before switching, the second pulse is ignored.
In the above figure, pulse *1 and *2 are ignored.
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相關代理商/技術參數 |
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|---|---|
| MB3793-27APNF-G-JN-6E1 | 制造商:Fujitsu 功能描述:3.5V to 16V 2.7V VvZbg/p[IZbg 8SOP Tube |
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| MB3793-28APNF-G-JN-6(E1) | 制造商:Fujitsu 功能描述: |
| MB3793-28APNF-G-JN-EF6E1 | 功能描述:Supervisor CMOS Inverted 1 Channel 8-SOP 制造商:cypress semiconductor corp 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:簡單復位/加電復位 受監(jiān)控電壓數:1 輸出:CMOS 反轉式 復位:低有效 復位超時:最小為 30 ms 電壓 - 閾值:2.8V 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商器件封裝:8-SOP 標準包裝:1 |
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