DEMOBOARD-U4091BM Atmel, DEMOBOARD-U4091BM Datasheet - Page 21

• Manufacturer Part Number: DEMOBOARD-U4091BM
• Description: BOARD DEMO FOR U4091BM
• Manufacturer: Atmel

Specifications of DEMOBOARD-U4091BM

• Main Purpose: Telecom, Phone IC, Corded
• Embedded: No
• Utilized Ic / Part: U4091BM
• Primary Attributes: DTMF, Speech Circuit, Tone-ringer, Voice Switch
• Secondary Attributes: Serial Bus MCU Interface
• Interface Type: Serial
• Operating Voltage: 12 V
• Operating Temperature Range: - 22 C to + 75 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: U4091BM

4872A–CORD–08/05
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
10 µA
I
RX
V
IN
M
I
10 µA
33 k
TX
+
-
56 k
V
M
I
FI
+
-
35 mV
V
M
+
-
I
DTD
SI
36 mV
V
M
OUT
I
4
V
B
+
-
Control
control
circuit
AFS
to mode
control
(I
I
4
3
)
Dial tone det.
(BNMT)
to
attenuators
BNMR
4
I
1 µF
1-4
U4091BM-R
21