U4080B Datasheet PDF - TEMIC Semiconductors
Part Number | U4080B | |
Description | Voice-Switched Circuit for Handsfree Operation | |
Manufacturers | TEMIC Semiconductors | |
Logo | ||
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Voice-Switched Circuit for Handsfree Operation
Description
The voice switched speakerphone integrated circuit,
U4080B, incorporates a variety of functions (see below).
The versality of the device is further enhanced by the
provision of a large number of pins giving access to
internal circuit points.
Features
D Operates on telephone lines, integrated reference
voltage regulation
D Output power: 100 mW at a 25-Ω load with peak
limitation
D Chip select pin for active/standby operation
D Linear volume control
D Monitoring system for background sound level
D Wide operating dynamic range through signal
compression
Block Diagram / Application Circuit
Figure 1. Block diagram and application circuit
TELEFUNKEN Semiconductors
Rev. A1, 20-May-96
Preliminary Information
1 (15)
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U4080B
Parameters
Test Conditions / Pins Symbol Min. Typ. Max. Unit
Speaker amplifier
Pins 15 and 19
Gain, V19 = 20 mVrms
Input impedance
Output voltage (Pin 19 =
GSA 33 34 35 dB
RI 15 22 37 kΩ
cap coupled to GND)
High output voltage
VO 2.4 3.0 3.6
V
V19 = 0.1 V,
V15 = –100 mA
Low output voltage
V19 = –0.1 V,
V15 = +100 mA
Log amplifiers
VOH
VOL
5.5
V
600 mA
Receive level detector
leakage current
V8 = VB + 1.0 V
Transmit level detector
Pin 8
ILR
2.0 mA
leakage current
V6 = VB + 1.0 V
Transmit-Receive
switching threshold
V8/V6 at 20 µA to switch
T-R comparator
Transmit detector
Pin 6
Pins 5 and 7
Pin 25
Pin 23
ILT
ITH
0.8
2.0 mA
1.2
DC voltage: Idle mode
T mode
Distortion
Pins 15 and 27
V23
V23
0
4.0
V
R mode: RECI to SAO
V27 = 10 mVrms’, f = 1 kHz
T mode: MIC to TO
V9 = 5 mVrms’ f = 1 kHz
d 1.5 %
d 2.0 %
TELEFUNKEN Semiconductors
Rev. A1, 20-May-96
Preliminary Information
5 (15)
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for U4080B electronic component. |
Information | Total 15 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ U4080B.PDF Datasheet ] |
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Part Number | Description | MFRS |
U4080B | The function is Voice-Switched Circuit for Handsfree Operation. TEMIC Semiconductors | |
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