參數(shù)資料
型號(hào)： SA2531D
廠商： SAMES
英文描述： VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
中文描述： 多功能單芯片電話號(hào)碼的劇目有14個(gè)撥號(hào)
文件頁(yè)數(shù)： 4/24頁(yè)
文件大小： 392K
代理商： SA2531D
4/24
SA2531 A/B/C/E/G/U
sames
FUNCTIONAL DESCRIPTION
Power On Reset
The on chip power on reset circuit monitors the supply voltage (V
DD
). When V
DD
rises above
approx. 1.2V, a power on reset occurs to assure correct start-up and the RAM is cleared.
DC Conditions
The normal operating range is from 13mA to 100 mA. Operating range with reduced
performance is from 5mA to 13mA. In the operating range all functions are operational.
At line currents below 13mA the SA2531 provided an additional scope below 4.5V to allow
parallel operation. (See Figure 12).
The dc characteristic (excluding diode bridge and Pulsing transistors) is determined by the
voltage at LI and the resistor R1 as follows:
VLS = VLI + I
Line
.R1
The voltage at LI is 4.5V.
During pulse dialling the speech circuit and other parts of the device not required are in a
power down mode to save current. The CS pin is pulled to V
SS
in order to turn the external
shunt transistor on to keep a low voltage drop at the LS pin during make periods.
AC Impedance
The Characteristic or Output impedance of the SA2531 is set within the IC and adjusted by
Mask Options. Available options are for 600
and 1000
. When the 1000
option is selected
then a capacitor may be added to the circuit at pin CI to add a reactive element and make the
output impedance complex.
Oscillator
All the Timing Functions of the SA2531 are based on a Clock Frequency of 3.58MHz. A crystal
or ceramic resonator of this frequency should be connected to the OSC pin. In practise minor
deviations from the nominal frequency may occur due to the characteristics of the frequency
reference device used and so it is recommended that care is taken in the selection of
components.
Typically a small value capacitor (
≤
47pF) should be connected in parallel with the Frequency
Reference to ensure start-up and/or operation at the nominal frequency.
Speech Circuit
The speech circuit consists of a transmit and a receive path born with soft clip, mute, line loss
compensation and side tone cancellation.
Transmit
The gain of the transmit from M1/M2 to LS is 35dB for 600
versions and 37dB for 1000
versions (see test circuit figure 5). The microphone input is differential with an input
impedance of 25 k
.
The soft clip circuit limits the output voltage at LI to 2.0V
PEAK
(see figures 8 & 9). The attack
time is 30μs/6dB and the decay time is 20 ms/6 dB. When mute is active, during dialling
相關(guān)PDF資料
PDF描述
SA2531E VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
SA2531F VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
SA2531G VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
SA2531J VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
SA2531U VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SA2531E 制造商:SAMES 制造商全稱:SAMES 功能描述:VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
SA2531F 制造商:SAMES 制造商全稱:SAMES 功能描述:VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
SA2531G 制造商:SAMES 制造商全稱:SAMES 功能描述:VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
SA2531J 制造商:SAMES 制造商全稱:SAMES 功能描述:VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
SA2531U 制造商:SAMES 制造商全稱:SAMES 功能描述:VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER
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

*
*
*