參數(shù)資料
型號(hào)： MT88L89
廠商： Mitel Networks Corporation
英文描述： 3V Integrated DTMF Transceiver with Adaptive Micro Interface(3V 集成雙音多頻信號(hào)（DTMF）接收器（帶自適應(yīng)微接口）)
中文描述： 3V的雙音多頻收發(fā)器集成自適應(yīng)微型接口（3V的集成雙音多頻信號(hào)（DTMF）的接收器（帶自適應(yīng)微接口））
文件頁(yè)數(shù)： 5/28頁(yè)
文件大?。?/td> 210K
代理商： MT88L89
MT88L89
4-127
Figure 5 - Basic Steering Circuit
Guard Time Adjustment
The simple steering circuit shown in Figure 5 is
adequate for most applications. Component values
are chosen according to the following inequalities
(see Figure 7):
t
REC
≥
t
DPmax
+ t
GTPmax
- t
DAmin
t
REC
≤
t
DPmin
+ t
GTPmin
- t
DAmax
t
ID
≥
t
DAmax
+ t
GTAmax
- t
DPmin
t
DO
≤
t
DAmin
+ t
GTAmin
- t
DPmax
The value of t
DP
is a device parameter (see AC
Electrical Characteristics) and t
REC
is the minimum
signal duration to be recognized by the receiver. A
value for C1 of 0.1
μ
F is recommended for most
Figure 6 - Guard Time Adjustment
V
DD
V
DD
St/GT
ESt
C1
Vc
R1
MT88L89
t
GTA
= (R1C1) In (V
DD
/ V
TSt
)
t
GTP
= (R1C1) In [V
DD
/ (V
DD
-V
TSt
)]
V
DD
St/GT
ESt
V
DD
St/GT
ESt
C1
R1
R2
C1
R1
R2
t
GTA
= (R1C1) In (V
DD
/V
TSt
)
R
P
= (R1R2) / (R1 + R2)
t
GTP
= (R
P
C1) In [V
DD
/ (V
DD
-V
TSt
)]
t
GTA
= (R
p
C1) In (V
DD
/V
TSt
)
R
P
= (R1R2) / (R1 + R2)
t
GTP
= (R1C1) In [V
DD
/ (V
DD
-V
TSt
)]
a) decreasing
t
GTP
;
(
t
GTP
<
t
GTA
)
b) decreasing
t
GTA
;
(
t
GTP
>
t
GTA
)
Figure 7 - Receiver Timing Diagram
V
in
ESt
St/GT
RX
0
-RX
3
b3
b2
Read
Status
Register
IRQ/CP
EVENTS
A
B
C
D
E
F
t
REC
t
REC
t
ID
t
DO
TONE #n
TONE
#n + 1
TONE
#n + 1
t
DP
t
DA
t
GTP
t
GTA
t
PStRX
t
PStb3
DECODED TONE # (n-1)
# n
# (n + 1)
V
TSt
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT88L89AC 制造商:MITEL 制造商全稱(chēng):Mitel Networks Corporation 功能描述:3V Integrated DTMFTransceiver with Adaptive Micro Interface
MT88L89AE 制造商:MITEL 制造商全稱(chēng):Mitel Networks Corporation 功能描述:3V Integrated DTMFTransceiver with Adaptive Micro Interface
MT88L89AN 制造商:Microsemi Corporation 功能描述:
MT88L89AN1 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHZ CMOS 3V 24SSOP - Rail/Tube
MT88L89ANR1 制造商:Microsemi Corporation 功能描述:DTMF TXRX 3.58MHZ CMOS 3V 24SSOP - Tape and Reel 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TXRX DTMF 3V 24SSOP 制造商:Microsemi Corporation 功能描述:IC TXRX DTMF 3V 24SSOP
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