參數(shù)資料
型號(hào)： Q67220-H1059
廠商： SIEMENS AG
英文描述： ISDN DC Converter Circuit IDCC
中文描述： 綜合業(yè)務(wù)數(shù)字網(wǎng)DC轉(zhuǎn)換器電路IDCC
文件頁(yè)數(shù)： 18/25頁(yè)
文件大小： 145K
代理商： Q67220-H1059
PEB 2023
PEF 2023
Functional Description
Semiconductor Group
18
08.97
Voltage Reference
The reference regulator of the PEB/F 2023 is based on a temperature compensated
bandgap. This circuitry is fully active at supply voltages (pin V
EXT
) above 6 volts and
provides up to 0.5mA of load current to external circuitry at 4 volts. This reference has to
be buffered by an external capacitor (C
min
= 1
μ
F).
Sawtooth Oscillator
The oscilator frequency is programmed by the two components R
1
and C
1
(see figure 4,
5 or 6). The oscillator timing capacitor C
1
is charged by V
REF
through R
1
and discharged
by an internal 10k
discharge-resistor. The rise-time of the sawtooth oscillator can be
programmed with R
1
and C
1
. The internal discharge-resistor and C
1
define the fall-time.
At the beginning of the discharge period a positive synchronization pulse is generated at
pin SYNC. Otherwise the PEB/F 2023 can be synchronized via pin SYNC to an external
logic clock by programming the oscillator to free run at a frequency 10% lower than the
synchronization frequency. The PEB/F 2023 is synchronized by the rising edge of the
sync. signal. So multiple devices can be synchronized together by programming one
master unit for the desired frequency (only one possible interfering frequency).
Note that the frequency of the output driver is half the oscillator frequency. The switching
frequency as a function of R
1
and C
1
is shown in
figure 9
.
Figure 9
Switching Frequency
0
50
100
150
200
250
300
350
10
20
30
40
50
60
70
80
90
100
R [ kOHM ]
f
10 pF
22 pF
68 pF
100 pF
220 pF
470 pF
1 nF
相關(guān)PDF資料
PDF描述
Q67223H1096 Telecommunication IC
Q67227H1015 Telecommunication IC
Q67227H1026 Telecommunication IC
Q67227H1099 Telecommunication IC
Q67231-H1007 ICs for Communications
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
Q67223H1096 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
Q67227H1015 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
Q67227H1026 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
Q67227H1099 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
Q67231-H1007 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Communications
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*