TDA5731M

Features:

· Balanced mixer with a common emitter input for band A (single input)
· 2-pin oscillator for bands A and B
· 3-pin oscillator for band C
· Balanced mixer with a common base input for band B and C (balanced input)
· Local oscillator buffer output for external synthesizer
· SAW filter preamplifier with a low output impedance to drive the SAW filter directly
· Electronic band switch.


Application

· 3-band TV tuners
· 3-band TV front-ends
· 3-band VCR tuners
· 3-band VCR front-ends.


Pinout




Specifications

SYMBOL	PARAMETER	MIN.	MAX/	UNIT
VP	supply voltage	-0.3	+7.0	V
VSW(max)	maximum switching voltage	-0.3	+7.5	V
VP(op)	operating supply voltage	4.5	5.5	V
Vn(max)	maximum voltage on each pin with a 22 k resistor connected in series	-	35	V
IO	output current of each pin to ground	-	-10	mA
tsc(max)	maximum short-circuit time (all pins)	-	10	s
Tstg	storage temperature	-55	+150
Tamb	operating ambient temperature	-10	+80
Tj	junction temperature	-	+150

Description

The TDA5731M is a monolithic integrated circuit that performs the band A, band B and band C mixer/oscillator functions in TV and VCR tuners. This low power mixer/oscillator circuit requires a power supply of 5 V and is available in a very small package outline. TDA5731M gives the designer the capability to design an economical and physically small 3-band tuner. The tuner development time can be drastically reduced by using this device.

In addition, when hyperband is not required, the TDA5731M may be used in a VHF/UHF tuner with an appropriate tuned circuit for VHFl and VHFlll in band A and the tuned circuit of band C for UHF.