SA2531 Datasheet, PDF (2/24 Pages) Sames – VERSATILE SINGLE CHIP TELEPHONE WITH 14 NUMBER REPERTORY DIALLER

SA2531 A/B/C/E/G/U
PACKAGE
Available in 28 pin DIP and PLCC
PIN CONFIGURATIONS
28 Pin PLCC
28 Pin DIP
PIN DESCRIPTION
Pin# Symbol Function
23 M1
Microphone Inputs
24 M2
Differential inputs for the microphone (electret).
3 RO1 Receiver Outputs
2 RO2 These are the outputs for driving a dynamic earpiece with an impedance
of 150 to 300Ω
5
A_GND Analogue Ground
This is the analog ground for the amplifiers.
28 RI
Receive Input
This is the input for the receive signal.
6 STB Side Tone Balance Input
This is the input for side tone cancellation.
1 LS
Line Current Sense Input
This is the input for sensing the line current.
27 LI
Line Input
This input is used for power extraction and line current sensing.
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sames