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參數(shù)資料
| 型號： | MT88L70AS |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 信令電路 |
| 英文描述： | 3 Volt Integrated DTMF Receiver |
| 中文描述： | TELECOM, DTMF SIGNALING CIRCUIT, PDSO18 |
| 封裝： | 0.300 INCH, MS-013AB, SOIC-18 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 474K |
| 代理商： | MT88L70AS |
MT88L70
Data Sheet
12
Zarlink Semiconductor Inc.
Figure 7 - Timing Diagram
EXPLANATION OF EVENTS
A)
TONE BURSTS DETECTED, TONE DURATION INVALID, OUTPUTS NOT UPDATED.
B)
TONE #n DETECTED, TONE DURATION VALID, TONE DECODED AND LATCHED IN OUTPUTS.
C)
END OF TONE #n DETECTED, TONE ABSENT DURATION VALID, OUTPUTS REMAIN LATCHED UNTIL NEXT VALID
TONE.
D)
OUTPUTS SWITCHED TO HIGH IMPEDANCE STATE.
E)
TONE #n+1 DETECTED, TONE DURATION VALID, TONE DECODED AND LATCHED IN OUTPUTS (CURRENTLY
HIGH IMPEDANCE).
F)
ACCEPTABLE DROPOUT OF TONE #n+1, TONE ABSENT DURATION INVALID, OUTPUTS REMAIN LATCHED.
G)
END OF TONE #n+1 DETECTED, TONE ABSENT DURATION VALID, OUTPUTS REMAIN LATCHED UNTIL NEXT
VALID TONE.
EXPLANATION OF SYMBOLS
V
in
DTMF COMPOSITE INPUT SIGNAL.
ESt
EARLY STEERING OUTPUT. INDICATES DETECTION OF VALID TONE FREQUENCIES.
St/GT
STEERING INPUT/GUARD TIME OUTPUT. DRIVES EXTERNAL RC TIMING CIRCUIT.
Q
1
-Q
4
4-BIT DECODED TONE OUTPUT.
StD
DELAYED STEERING OUTPUT. INDICATES THAT VALID FREQUENCIES HAVE BEEN PRESENT/ABSENT FOR THE
REQUIRED GUARD TIME THUS CONSTITUTING A VALID SIGNAL.
TOE
TONE OUTPUT ENABLE (INPUT). A LOW LEVEL SHIFTS Q
1
-Q
4
TO ITS HIGH IMPEDANCE STATE.
t
REC
MAXIMUM DTMF SIGNAL DURATION NOT DETECTED AS VALID.
t
REC
MINIMUM DTMF SIGNAL DURATION REQUIRED FOR VALID RECOGNITION.
t
ID
MINIMUM TIME BETWEEN VALID DTMF SIGNALS.
t
DO
MAXIMUM ALLOWABLE DROP OUT DURING VALID DTMF SIGNAL.
t
DP
TIME TO DETECT THE PRESENCE OF VALID DTMF SIGNALS.
t
DA
TIME TO DETECT THE ABSENCE OF VALID DTMF SIGNALS.
t
GTP
GUARD TIME, TONE PRESENT.
t
GTA
GUARD TIME, TONE ABSENT.
V
in
ESt
St/GT
Q
1
-Q
4
StD
TOE
EVENTS
A
B
C
D
E
F
G
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
PQ
t
QStD
t
PSrD
t
PTD
t
PTE
# n
# (n + 1)
HIGH IMPEDANCE
DECODED TONE # (n-1)
V
TSt
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|---|---|
| MT88L70AS1 | 3 Volt Integrated DTMF Receiver |
| MT88L70AT | 3 Volt Integrated DTMF Receiver |
| MT88L70AS | 3 Volt Integrated DTMF Receiver |
| MT88L70AN | 3 Volt Integrated DTMF Receiver |
| MT88L70AE | 3 Volt Integrated DTMF Receiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT88L70AS1 | 制造商:Microsemi Corporation 功能描述:PB FREE 3V 8870 DTMF RECEIVER 制造商:Microsemi Corporation 功能描述:DTMF RX 3.58MHZ CMOS 3V 18SOIC - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC RECEIVER DTMF 18SOIC 制造商:Microsemi Corporation 功能描述:IC RECEIVER DTMF 18SOIC |
| MT88L70ASR | 制造商:Microsemi Corporation 功能描述: |
| MT88L70ASR1 | 制造商:Microsemi Corporation 功能描述:DTMF RX 3.58MHZ CMOS 3V 18SOIC - Tape and Reel 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC RECEIVER DTMF 18SOIC 制造商:Microsemi Corporation 功能描述:IC RECEIVER DTMF 18SOIC |
| MT88L70AT | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:3 Volt Integrated DTMF Receiver |
| MT88L85 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:3V Integrated DTMFTransceiver with Power Down & Adaptive Micro Interface |
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