参数资料
型号: W91030BS
厂商: WINBOND ELECTRONICS CORP
元件分类: 无绳电话/电话
英文描述: TELEPHONE CALLING NO IDENT CKT, PDSO24
封装: 300MIL, PLASTIC, SOP-24
文件页数: 32/32页
文件大小: 245K
代理商: W91030BS
W91030B
Publication Release Date: Sep. 27, 2005
- 9 -
Revision A2
ALGR
ALGRC
ALGO
Discharge
Switch
Charge
Switch
Tip/Ring
ON
Alerting Signal
VCPth
t DP
t GP
t REC
t DA
t GA
tABS
Figure 7-5. Guard Time Waveform of ALGR, ALGRC and ALGO pins
Figure 7-6. Guard Time Circuits with Unequal Present and Absent Time
(a) t GP > tGA
t GP
DD
= R1 C ln [V
DD
CPth
/ (V
-V
)]
t GA = RP C ln [(VDD -VD (RP / R2)) / (V CPth -V D (R P / R2))]
RP = R1 R2 / (R1 + R2)
VD = diode forward voltage
R1
R2
C
ALGRC
ALR
W91030B
R1
R2
C
ALGRC
ALR
W91030B
(b) t GP > t GA
t GP
DD
= R1 C ln [V
DD
CPth
/ (V
-V
)]
t GA
= R P C ln [(VDD -VD (R P / R2)) / (V
-VCPth -V D (R P / R2))]
RP = R1 R2 / (R1 + R2)
VD = diode forward voltage
DD
VDD
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