TDA4320X Datasheet, PDF (2/16 Pages) Siemens Semiconductor Group – FM-IF with Counter Output, Field Strength Indicator, Noise Detector and MUTE Setting

1.2 Pin Configuration
(top view)
P-DSO-16-1
TDA 4320X
Figure 1
1.3 Pin Definitions and Functions
Pin No. Symbol
Function
1
GND
Ground
Decoupling capacitors for bias, V_S and V_REF Pins are to be
connected directly to Pin 1
2
Multipath
Multipath identification input
identification input High impedance input (R_i ~ 10 kΩ). This input receives
the filtered field strength output (high pass or band pass).
3
Rectifier time
Rectifier time constant
constant
Determines the attack and release time of the
identification circuit.
4
Multipath
Multipath identification output
identification
Open npn-collector output, which is low during
output
(V4/V1 ≤ 0.7 V) multipath interference.
5
MUTE input
MUTE input
For DC voltage (usually derived from field strength output
voltage) which attenuates the AF output voltage by the
setting muting depth (Pin 7). Max. attenuation when
V₅ = 0 V, no attenuation when V₅ ≥ 0.5 V.
6
AF output
AF output
Demodulated FM-IF.
Semiconductor Group
36
04.96