TOSHIBA Bipolar Linear Integrated Circuit TA8132AN / AF, TA2012N / F - Digital Tuning System AM/FM IF+ST DET IC Specifications

Oct 12, 2026

Device specification describes the TOSHIBA TA8132AN/TA8132AF and TA2012N/TA2012F AM/FM IF + ST DET system ICs designed for digital tuning radios with IF counter support. It details built-in AM/FM IF and FM stereo PLL multiplex decoding, IF count output control, mute control, and adjustable sensitivity via external resistance. It further provides pin-by-pin terminal functions, DC voltages, FM IF divider switching (10.7 MHz or 1/8 division), and an AM low-cut circuit using an external capacitor.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages21

Reading Time53 min

AccessFree to download

Features

FM IF divider and sensitivity adjustment

Application notes: IF count output control

Explanation of terminals (pin descriptions)

AM low-cut circuit

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8132AN,TA8132AF,TA2012N,TA2012F 3V AM / FM IF + MPX (For Digital Tuning System) TA8132AN, TA8132AF and TA2012N, TA2012F are the AM / FM IF+ST DET system ICs, which are designed for DTS radios. These are included many functions and these can be used for digital tuning system with IF counter. Features 􀀁 Built−in AM / FM IF and FM stereo PLL multiplex decoder. 􀀁 Suitable for combination with digital tuning system which is included IF counter. ○ One terminal type AM / FM IF count output (auto stop signal) for IF counter of digital tuning system. FM: 10. 7MHz or 1. 3375MHz (1 / 8 dividing) changeable by external switch AM: 450kHz ○ Built−in mute circuit for IF count output. It is controlled by the IF request signal from digital tuning system, Pin(8) level: High → come out Low → non output ○ Adjustable for IF count output sensitivity by external resistance of pin(2) . 􀀁 For adopting ceramic discriminator and ceramic resonator, it is not necessary to adjust the FM quad detector circuit and FM ST DET VCO circuit. 􀀁 S curve characteristics of FM detection output in TA8132AN, TA8132AF and TA2012N, TA2012F are reverse to each other. TA8132AN, TA8132AF: Reverse characteristic. TA2012N, TA2012F: Normal characteristic. 􀀁 Built−in one terminal type AM low cut circuit. 􀀁 TA2053F is reverse pin type of TA2012F. 􀀁 Operating supply voltage range (Ta = 25°C) V CC (opr.) = 1.8~8.0V Block Diagram (Note) We recommend Ceramic resonator: CSB456F18 Ceramic discriminator: CDA10 .7MG18 (MURATA MFG CO. , LTD) TA8132AN / AF , TA2012N / F Explanation Of Terminals | Pin
No. | Item | Internal Circuit | DC Voltage (V)
(at no Signal) | | | --- | --- | --- | --- | --- | | | | | AM | FM | | 1 | AM RF IN | | 3.0 | 3.0 | | 2 | ・ IF count output sensitivity adjust terminal
・ FM IF divider control terminal | | ― | ― | | 3 | AM OSC | | 3.0 | 3.0 | | 4 | AM OSC OUT | | 2.7 | 3.0 | | 5 | V CC | ― | 3.0 | 3.0 | | 6 | AM LOW CUT | | 2.3 | 2.3 | TA8132AN / AF , TA2012N / F | Pin
No. | Item | Internal Circuit | DC Voltage (V)
(at no Signal) | | | --- | --- | --- | --- | --- | | | | | AM | FM | | 7 | AGC | | 0.25 | 0.35 | | 8 | IF OUT SW | | ― | ― | | 9 | IF OUT | | 3.0 | 3.0 | | 10 | TUN LED (tuning LED) | | ― | ― | | 11 | ST LED (stereo LED) | | ― | ― | | 12 | GND | ― | 0 | 0 | | 13
14 | R􀀁OUT L􀀁OUT | | 1.0 | 1.0 | TA8132AN / AF , TA2012N / F | Pin
No. | Item | Internal Circuit | DC Voltage (V)
(at no Signal) | | | --- | --- | --- | --- | --- | | | | | AM | FM | | 15 | VCO | | 2.5 | 2.5
(VCO
stop
mode) | | 16 | LPF2
・ LPF terminal for synchronous detector
・ Bias terminal for AM / FM switch circuit
V 16 = V CC→AM
V 16 = open→FM | | 3.0 | 2.2 | | 17 | LPF1
・ LPF Terminal for phase detector ・ VCO stop terminal
V 17 = V CC→VCO stop | | 2.7 | 2.2 | | 18 | FM ST DET IN | | 0.7 | 0.7 | | 19 | DET OUT | | 1.1 | 1.1 | TA8132AN / AF , TA2012N / F | Pin
No. | Item | Internal Circuit | DC Voltage (V)
(at no Signal) | | | --- | --- | --- | --- | --- | | | | | AM | FM | | 20 | QUAD (FM QUAD. Detector) | | 2.4 | 2.1 | | 21 | AM IF IN | | 3.0 | 3.0 | | 22 | BY􀀁PASS
By􀀁pass for AM/FM IF AMP | | 2.3 | 2.8 | | 23 | AM MIX OUT | | 3.0 | 3.0 | | 24 | FM IF IN | | 3.0 | 3.0 | Application Note 1. How to control the IF count output signal (pin(9) output) | | | TUN LED | | | --- | --- | --- | --- | | | | ON | OFF | | V8 | H | Come out | Non output | | | L | Non output | Non output | 􀀁 Whether or not there is the IF count output signal (pin(9) output) is determined by the and of the pin(8) control voltage: V8 and tuning LED on / off switching. In the condition of V 8: High (active high, VTH = 0 . 8V (typ.)) TUN LED: ON (Vin ≥ VL+2dBµV EMF (typ.)) the IF count output signal comes out from the pin(9) . In the case of the tuning LED function is not needed, it

FAQs

What are the TA8132AN/TA8132AF and TA2012N/TA2012F ICs used for?

They are AM/FM IF + ST DET system ICs for DTS (digital tuning system) radios, including IF counter-related functionality.

How is the IF count output signal controlled in the application note?

The output on pin(9) depends on the logical AND of pin(8) control voltage and the tuning LED on/off state.

How do you switch the FM IF frequency between 10.7 MHz and the 1/8 divided value?

Use the FM IF divider control with VCC for 10.7 MHz output, and GND or OPEN for 1.3375 MHz output (1/8 dividing).

How is the AM low-cut cutoff frequency determined?

The cutoff frequency depends on the internal resistance (typ. 22 kΩ) and the external capacitor C6, using the provided relationship; if low-cut isn’t needed, C6 should be set above 0.47 µF.

Oct 12, 2026

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