U4091BM-RFNY Atmel, U4091BM-RFNY Datasheet - Page 22

• Manufacturer Part Number: U4091BM-RFNY
• Description: IC PROG PHONE AUDIO PROC 44SSOP
• Manufacturer: Atmel

Specifications of U4091BM-RFNY

• Function: Telephone Audio Processor
• Number Of Circuits: 1
• Voltage - Supply: 3.1 V ~ 3.5 V
• Power (watts): 900mW
• Operating Temperature: -25°C ~ 75°C
• Mounting Type: Surface Mount
• Package / Case: 44-SSOP
• Includes: Speaker Amplifier
• For Use With: DEMOBOARD-U4091BM - BOARD DEMO FOR U4091BM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Interface: -

22
Atmel U4091BM-R
Figure 12-5. Dial Tone Detector
Figure 12-6. Background Noise Monitor
Figure 12-7. Generation of Control Voltage (CT) for Mode Switching
(TLDT)
TLDR
C
CT
CT
10µA
I
RX
V
IN
M
I
10µA
TX
33kΩ
+
-
56kΩ
V
M
I
FI
+
-
35mV
V
M
DTD
+
I
-
SI
36mV
V
M
OUT
I
4
V
B
+
-
Control
control
circuit
AFS
to mode
control
(I
I
4
3
)
Dial tone det.
to
attenuators
(BNMT)
BNMR
4
I
1-4
1µF
4872B–CORD–01/11