KA8504 Datasheet, PDF (2/4 Pages) Samsung semiconductor – SPEECH NETWORK WITH DIALER INTERFACE

KA8504
SPEECH NETWORK WITH DIALER INTERFACE
PIN CONFIGURATION
V_L 1
CI 2
CO 3
BIAS 4
MF 5
MUTE 6
V_R ⁷
GND ⁸
16 Vcc
15 RXO
14 ROF
13 RXI
12 GC
11 MIC-
10 _MIC+
9 _TOF
Fig. 2
PIN DESCRIPTION
Pin No
1
2
3
4
5
Symbol
VL
CI
CO
BIAS
MF
6
MUTE
7
VR
8
GND
9
TOF
10
MIC +
11
MIC -
12
GC
13
RXI
14
ROF
15
RXO
16
VCC
Description
Positive power line and TX Amp Output.
Current input.
Current output.
If the line current is large, this pin dissipates excess power (current)
AC signal reference voltage terminal.
DTMF input.
When the mute pin is “H” level, this pin become active.
Mute input.
When this pin is 'H’level, speech circuit is muted and the DTMF input is enabled.
The voltage of this part becomes reference voltage of internal Amp.
Negative power line.
Output of the Mic Amp.
Negative feedback to MIC -.
Non inverting Mic input.
Inverting Mic input.
Gain triggering point regulation.
Receiver input.
RX out and negative feedback to RX input.
Receiver Amp out.
Internal power supply pin. Power is supplied from VL through resistor.