BL1110A
BL1110A is Low voltage versatile transmission IC manufactured by BELLING.
DESCRIPTION:
BL1110A(BL1001) is a low voltage versatile transmission IC. It offers the entire microphone, receive and line interface functions required in telephone sets. It performs the interface between the line and the transducers of the handset. It includes a DTMF amplifier, a microphone amplifier and a receive amplifier. The selection between the microphone amplifier and the DTMF amplifier is made with a “MUTE” function. The MUTE/input switches-off both the microphone and the receive amplifiers and switches-on the DTMF amplifier.
Features
- Low DC line voltage: operates down to 1.6 V
- Voltage regulator with adjustable DC voltage
- Provides a supply for external circuits
- Symmetrical high impedance inputs (64 k W) for dynamic, magnetic or piezo- electric microphones
- Asymmetrical high impedance input (32 k W) for electrets microphones
- DTMF input with confidence tone
- MUTE input for pulse or DTMF dialing
- Receiving amplifier for dynamic, magnetic or piezo-electric earpieces
- AGC line loss pensation for microphone and earpiece amplifiers.
- Line powered telephone sets, cordless telephones, fax machines, answering machines.
BLOCK DIAGRAM：
BL1001 http://.belling..cn
-1Total 8 Pages
8/10/2006
Wrote by 2006
SELECTION GUIDE：
- DIP14：plastic dual in-line package; 14 leads (300 mil)
- SO14：plastic small outline package; 14 leads; body width 3.9 mm
PIN CONFIGURATION：
PIN DESCRIPTION：
PIN SYMBOL 1 LN 2 SLPE 3 REG 4 nc 5 DTMF 6 _MUTE 7 IR 8 AGC 9 MIC10 MIC+ 11 VEE 12 QR 13 GAR 14 VCC
FUNCTION Positive line terminal
Slope adjustment Line voltage regulator decoupling
No function DTMF input MUTE input Receive amplifier input Automatic gain control Inverting microphone input Non inverting microphone input Negative line terminal Receive amplifier output Receive gain reduction adjustment Supply voltage for speech and peripherals http://.belling..cn
-2Total 8 Pages
8/10/2006
Wrote by...
