TA2154AFN

www.DataSheet4U.com TA2154AFN TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA2154AFN 1.5 V 1 Chip Tuner IC (for Digital Tuning System) TA2154AFN is developed for 1.5 V headphone stereos. It incorporates all the functions of an FM/TV front end, AM/FM IF, and FM multiplex. The IC can be used for IF count digital tuning systems. Since the IC divides the buffer output frequency by 16 while suppressing the FM/TV local oscillation level, the IC can suppress unnecessary emission, facilitating conformance to the new FCC specifications (part 15). Features · · · FM/TV local oscillator level is low (Built-in auto level control circuit) Suitable for combination with digital tuning system, which is included IF counter. One terminal type AM/FM IF count output for IF counter of digital tuning system. · · · · AM: 450 kHz FM: 10.7 MHz Weight: 0.17 g (typ.) One terminal type FM/TV local oscillator. Local oscillator buffer output terminal shared by AM, FM and TV · · · AM: 1/1 FM: 1/32 TV: 1/8 · · · For adopting ceramic discriminator, it is not necessary to adjust the FM quad detector circuit. Built-in FM MPX VCO circuit. Low supply current (VCC = 1.2 V, Ta = 25°C) Iccq (AM) = 5.0 mA (typ.) Iccq (FM) = 13.0 mA (typ.) Iccq (TV) = 13.5 mA (typ.) · · Operating supply voltage: VCC = 1.0~2.2 V (Ta = 25°C) Monaural operating supply voltage: VCC = 0.95~2.2 V (Ta = 25°C) 1 2002-10-21 TA2154AFN Block Diagram VT OSC OUT L OUT VCC MODE SW2 MODE SW1 IF REQ IF OUT 30 RFVCC ...