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參數(shù)資料
| 型號： | ZN448J |
| 英文描述： | Converter IC |
| 中文描述： | 轉(zhuǎn)換器IC |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 289K |
| 代理商： | ZN448J |
ZN448/9
7
Fig.8 Clock circuit external components
BUSY
OUTPUT
The
BUSY
output, shown in Fig.7, utilises a passive pull-up for
CMOS/TTL compatibility. This allows up to four
BUSY
outputs
to be wire-ANDed together to form a common interrupt line.
Fig.7
BUSY
output
ON-CHIP CLOCK
The on-chip clock operates with only a single external
capacitor connected between pin 3 and ground, as shown in
Fig.8a. A graph of typical oscillator frequency versus
capacitance is given in Fig.9. The oscillator frequency may be
trimmed by means of an external resistor in series with the
capacitor, as shown in Fig.8b. However, due to processing
tolerance, the absolute clock frequency may vary
considerably between devices. For optimum accuracy and
stability of the oscillator frequency, it may be possible to use
a crystal or ceramic resonator with suitable load components,
as shown in Fig.8c. The final option is to overdrive the
oscillator input with an external clock signal from a TTL or
CMOS gate, as shown in Fig.8d.
9
3OSC
GND
9
3
3
2k
MAX
1.2k
VCC
9
3
Xtal
1MHz
,
56pF
2200pF
,
4.7k
,
Load circuit to suit
device used
c) Crystal or resonator
,
a) Fixed/variable capacitor
b) Fixed capacitor + variable resistor
d) External TTL or CMOS drive
相關PDF資料 |
PDF描述 |
|---|---|
| ZN449J | Converter IC |
| ZN448E | TV 53C 40#22D 9#16 4#12 PIN RE |
| ZN449 | TV 53C 40#22D 9#16 4#12 PIN RE |
| ZN449D | 8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER |
| ZN449E | 8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ZN449 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER |
| ZN449D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER |
| ZN449E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROPROCESSOR COMPATIBLE A-D CONVERTER |
| ZN449J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Converter IC |
| ZN450CJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:VOLTMETER CIRCUIT|DIP|40PIN|CERAMIC |
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