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參數資料
| 型號： | W91031S |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | Calling Line Identifier |
| 中文描述： | 來電線路識別 |
| 文件頁數： | 7/29頁 |
| 文件大小： | 274K |
| 代理商： | W91031S |
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Preliminary W91031
Publication Release Date: August 2000
- 7 - Revision A1
Tip/A
R1 = 470K
C1 = 0.1uF
Ring/B
C1 = 0.1uF
C3 = 0.22uF
R5=150K
R2 = 470K
R3 = 200K
R4 = 300K
RNGDI
W91031
RNGRC
RNGON
Allowance minimal ring voltage (peak to peak) is:
Vpp
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)
= 2 (V
T+(max)
(R1 + R3 + R4) / R4 + 0.7)
T+
)]
R5 from 10K ohm to 500K ohm.
C3 from 47 nF to 0.68 uF.
V
DD
V
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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相關代理商/技術參數 |
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| 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:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
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| W91031SG T&R | 制造商:Nuvoton Technology Corp 功能描述:IC CALL LINE IDENT 24-SOIC |
| W91031SG T&R | 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:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| W91040 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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