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參數(shù)資料
| 型號： | W91030 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | Low Power CMOS IC For Caller indentification(用于通信中呼叫確認(rèn)的低功耗CMOS集成電路芯片) |
| 中文描述： | TELEPHONE CALLING NO IDENT CKT, PDIP24 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-24 |
| 文件頁數(shù)： | 7/30頁 |
| 文件大小： | 359K |
| 代理商： | W91030 |
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Preliminary W91030
Publication Release Date: May 1997
- 7 - Revision A1
FUNCTIONAL DESCRIPTION
Figure 6 is shown functional blocks of W91030. The device must operate with a 3.579545 MHz
system clock and consists four major functions and decribed as follows:
Ring Detector
The application circuit in Figure 7-1 illustrates the relationship between the RNGDI, RNGRC and
RNGON signals. The three pin combination is used to detect an increase of the RNGDI voltage from
ground to a level above the Schmitt trigger high going threshold voltage V
T+
.
Tip/A
R1 = 470K
C1 = 0.1uF
Ring/B
C1 = 0.1uF
C3 = 0.22uF
R5=150K
R2 = 470K
R3 = 200K
R4 = 300K
RNGDI
W91030
RNGRC
RNGON
Allowance minimal ring voltage (peak to peak) is:
Vpp
= 2 (V
T+(max)
(R1 + R3 + R4) / R4 + 0.7)
Tolerance to noise between Tip and Ring and Vss is:
Vpeak
(max noise)
= V
T+(min)
(R1 + R3 + R4) / R4 + 0.7
Time constant is:
T = R5 C3 ln [V / (V - V
V
T+(min)
<= V
T+
<= V
T+(max)
T+
)]
R5 from 10K ohm to 500K ohm.
C3 from 47 nF to 0.68 uF.
DD
DD
Figure 7-1. Application Circuit of the Ring Detecter
The RC time constant of the RNGRC pin is used to delay the output pulse of the RNGON pin for a
low going edge on RNGDI. This edge goes from above the V
T+
voltage to the Schmitt trigger low
going threshold voltage V
T-
. The RC time constant must be greater than the maximum period of the
ring signal, to ensure a minimum RNGON low interval and to filter the ring signal to get an envelope
output.
The diode bridge shown in Figure 7-1 works for both single ended ring signal and balanced ringing.
R1 and R2 are used to set the maximum loading and must be of equal value to achieve balanced
loading at both the tip and ring line. R1, R3 and R4 form a resistor divider to supply a reduced voltage
to the RNGDI input. The attenuation value is determined by the detection of minimal ring voltage and
maximum noise tolerance between tip/ring and ground.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W91030B | 制造商:WINBOND 制造商全稱:Winbond 功能描述:CALLING LINE IDENTIFIER |
| W91030B/BS | 制造商:WINBOND 制造商全稱:Winbond 功能描述:Calling Line Identifier |
| W91031 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:LOW POWER CMOS INTERGRATED CIRCUIT |
| W91031S | 制造商:WINBOND 制造商全稱:Winbond 功能描述:Calling Line Identifier |
| W91031SG | 功能描述:IC CALL LINE IDENT 24-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:* |
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