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參數資料
| 型號： | MSM6542-3RS |
| 廠商： | LAPIS SEMICONDUCTOR CO LTD |
| 元件分類： | 時鐘/數據恢復及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-24 |
| 文件頁數： | 27/55頁 |
| 文件大小： | 361K |
| 代理商： | MSM6542-3RS |
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Semiconductor
MSM6542-01/02/03
99
Sample peripheral circuits
Before using sample peripheral circuits shown below, check them against the user's system.
Power supply circuit (Place a bypass capacitor as close to the IC as possible.)
[When power is supplied from the +5V power supply]
+5.1V
A495
VCE (sat) = 0.1V
4.7F
Tantalum capacitor
VDD
VSS
MSM6542
+ + 0.01
Ceramic
capacitor
+
22
R*
10K
51K
10K
C372
1.2 x 3 = 3.6V
Cadmium battery
When the power supply is turned off, inverse current
flows temporarily from the collector of the A495 transistor
to the emitter. To deal with this problem, use a large
value capacitance.
R*: For less than charge current limit
IS1588
V = 0.69V
F
+5.7V
Alternative circuit
R
4.7
+
0.01
VDD
GND
MSM6542
Tantalum
capacitor
Ceramic
capacitor
Lithium battery
R: Limit resistance to conform to the UL standard.
The value depends on the nominal capacity of the
battery used. Consult the battery manufacture.
C372
VF = 0.69V
or
Schottky diode
Main power
supply (5V)
Main power
supply (5V)
One-chip
voltage
detector
IC
VDD
VSS
CS1
MSM6542
This circuit detects a rough voltage level.
It is suitable for a system for which the DP
bit is set at 1.
VDD
VSS
CS1
MSM6542
Sample main power supply monitor circuit
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