TDA7421N datasheet(5/38 Pages) STMICROELECTRONICS

Part #	TDA7421N

Description	AM/FM TUNER FOR CAR RADIO AND HI-FI APPLICATIONS

PDF	38 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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5 / 38 page

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TDA7421N

(*) Pin function is user defined by software.

FM IF AMP2 IN -

FM 2nd IF amplifier negative input (differential -)

FM IF AMP2 IN +

FM 2nd IF amplifier positive input (differential +)

FM IF AMP1 OUT

FM 1st IF amplifier output

FM IF AMP IN -

FM 1st IF amplifier negative input (differential -)

FM IF AMP IN +

FM 1st IF amplifier positive input (differential +)

AM S-METER TC

AM S-meter time constant

AM MIX2 OUT

AM 2nd mixer output

RF VCC

RF positive supply

AM MIX2 IN -

AM 2nd mixer negative input (differential -)

AM MIX2 IN +

AM 2nd mixer positive input (differential +)

FM IF AGC IN

FM IF AGC input

MIX OUT -

FM/AM 1st mixer negative output (differential -)

MIX OUT +

FM/AM 1st mixer positive output (differential +)

AM AGC1 TC

AM 1st AGC time constant

AM AGC1 RF AMP

AM 1st AGC voltage output (to RF amplifier)

AM AGC1 PIN

AM 1st AGC current output (to antenna attenuation diodes)

Name

Function

PIN DESCRIPTION (Continued)

TDA7421N Datasheet(PDF) 5 Page - STMicroelectronics