參數資料
型號: U4090B-P
英文描述: Low power dual voltage comparators
中文描述: U4090B磷[更新9 / 03。 34頁]
文件頁數: 18/34頁
文件大?。?/td> 622K
代理商: U4090B-P
18
U4090B-N
4740A–CORD–09/03
Explanation of
Abbreviations
RECATT = Receive attenuation
STIS, STIL = Inputs of sidetone balancing amplifiers
ES = External supply
AFS = Acoustic feedback suppression control
AGA = Automatic gain adjustment
RA2 = Inverting receive amplifier
TXACL = Transmit anti-clipping control
Table 3.
Selection of Transmit Mute
Logic Level MUTX
MODE
0
MIC 1/2 transmit enabled receive enable
AFS = on
AGA = on
TXACL = on
DTMF transmit enabled receive enable
AFS = on
AGA = on
TXACL = on
DTMF transmit enabled
DTMF to receive enable
AFS = off
AGA = off
TXACL = off
Speech
Z
For answering machine
1
DTMF dialling
Table 4.
Specification of Logic Levels
Logic Level
0 = < (0.3 V)
Z = > (1 V) < (VMP - 1 V) or (open input)
1 = > (VMP - 0.3 V)
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