U4091B TEMIC Semiconductors, U4091B Datasheet - Page 2
U4091B
Manufacturer Part Number
U4091B
Description
Programmable Telephone Audio Processor
Manufacturer
TEMIC Semiconductors
Datasheet
1.U4091B.pdf
(11 pages)
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Serial Bus Controlled Functions
Speech circuit
D
D
D
D
D
D
U4091B
2 (11)
Transmit gain: 36 to 52 dB (1 dB step)
Receive gain: –7 dB to +9 dB (1 dB step) + one 6 dB
step
Speaker amplifier gain: –10 dB to +30 dB (1.5 dB
step)
Mute R, Mute T
Automatic gain adjustment ( AGA ): 7 different
characteristics
Impedance selection: 600/ 900
W
Preliminary Information
Ringer
D
Voice switch
D
D
D
D
D
D
D
Volume adjustment
Volume adjustment
Attenuation range: 0 to 50 dB (1 dB steps)
4 thresholds for mode switching
Mute of handsfree microphone
Chip disable
Hand set / handsfree switching
Four point level detection
TELEFUNKEN Semiconductors
Rev. A1: 12.07.1995
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