U4089B Datasheet, PDF (14/25 Pages) ATMEL Corporation – MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT

U4089B-M Control
MUTX
MIC 1/2 transmit enabled receive enable
0
AFS = on
AGA = on
TXACL = on
DTMF transmit enabled receive enable
Z
AFS = on
AGA = on
TXACL = on
DTMF transmit enabled DTMF to receive enable
1
AFS = off
AGA = off
TXACL = off
MODE
Speech
For answering machine
DTMF dialling
0
0 to Z
1 to Z
1
IMPSEL
Line impedance = 600 W
TXA = on
ES = off
Line impedance = 600 W
TXA = off
ES = on
Line impedance = 900 W
TXA = off
ES = on
Line impedance = 900 W
TXA = on
ES = off
MODE
Speech
Transmit mute
Transmit mute
Speech
Logic Level
0 = < (0.3 V)
Z = > (1 V) < (V_MP - 1 V) or (open input)
1 = > (V_MP - 0.3 V)
AFS = Acoustical feedback-suppression control
AGA = Automatic gain adjustment
TXACL = Transmit anti-clipping control
ES = External supply
14 U4089B-M
4570A–CORD–04/03