August 1990 2
Philips Semiconductors Product specification
Integrated FM tuner for radio receivers TDA1574T
GENERAL DESCRIPTION
The TDA1574T is an integrated FM tuner circuit designed for use in the RF/IF section of car radios and home receivers.
The circuit contains a mixer and an oscillator and a linear IF amplifier for signal processing. The circuit also incorporates
the following features.
Features
• Keyed Automatic Gain Control (AGC)
• Regulated reference voltage
• Buffered oscillator output
• Electronic standby switch
• Internal buffered mixer driving.
QUICK REFERENCE DATA
PACKAGE OUTLINE
20-lead mini-pack; plastic (SO20; SOT163A); SOT163-1; 1996 September 9.
PARAMETER CONDITIONS SYMBOL MIN. TYP. MAX. UNIT
Supply voltage range
(pin 17) V
P
7 − 14 V
Mixer input bias voltage
(pins 1 and 2) V
1,2-4
− 1 − V
Noise factor NF − 9 − dB
Oscillator output voltage
(pin 6) V
6-4
− 2 − V
Output admittance at pin 6 f = 108.7 MHz Y22 − 1.5 + j2 ms
Oscillator output buffer
DC output voltage (pin 9) V
9-4
− 6 − V
Total harmonic distortion THD −−15 − dB
Linear IF amplifier output
voltage (pin 12) V
12-4
− 4.5 − V
Noise factor R
S
= 300 Ω NF − 6.5 − dB
Keyed AGC output voltage
range (pin 20) V
20-4
0.5 − V
P
−0.3 V
