Product Summary

The TC9256 is a phase-locked loop (PLL) LSI for digital tuning systems (DTS) with built-in two-modulus prescalers. All functions are controlled through three serial bus lines. The TC9256 is used to configure high-performance digital tuning systems.

Parametrics

TC9256 absolute maximum ratings: (1)Supply voltage, VDD: 0.3 to 6.0 V; (2)Input voltage, VIN: -0.3 to VDD +0.3 V; (3)N-ch open-drain OFF withstanding voltage, VOFF: 13 V; (4)Power dissipation, PD: 300 (200) mW; (5)Operating temperature, Topr: -40 to 85℃; (6)Storage temperature, Tstg: -65 to 150℃.

Features

TC9257 features: (1)Suitable for use in digital tuning systems in high-fi tuners and car stereos; (2)Built-in prescalers operate at an input frequency ranging from 30 to 150 MHz during FMINinput (with two-modulus prescaler) and at 0.5 to 40 MHz during AMINinput (with two-modulus prescaler or direct dividing); (3)16-bit programmable counter, dual parallel output phase comparator, crystal oscillator and reference counter; (4)3.6 MHz, 4.5 MHz, 7.2 MHz or 10.8 MHz crystal oscillators can be used; (5)15 possible reference frequencies (when using 4.5 MHz crystal): ref. = 0.5 k, 1 k, 2.5 k, 3 k, 3.125 k, 3.90625 k, 5 k, 6.25 k, 7.8125 k, 9 k, 10 k, 12.5 k, 25 k, 50 k and 100 kHz; (6)Built-in 20-bit general-purpose counter for such uses as measuring intermediate frequencies (IFIN1 and IFIN2) and low-frequency pilot signal cycles (SCIN). (No cycle measurement function is available on the TC9256APG and TC9256AFG.); (7)High-precision (±0.55 to ±7.15 μs) PLL phase error detection; (8)Numerous general-purpose I/O pins for such uses as peripheral circuit control; (9)Four N-channel open-drain output ports (OFF withstanding voltage: 12 V) for such uses as control signal output; (10)Standby mode function (turns off FM, AM and IF amps) to save current consumption; (11)All functions controlled through three serial bus lines; (12)CMOS structure with operating power supply range of VDD = 5.0 ± 0.5 V; (13)16-pin DIP (TC9256APG), 16-pin SOP (TC9256AFG) packages.

Diagrams

TC9256 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
TC9256APG
TC9256APG

Other


Data Sheet

Negotiable 
TC9256F
TC9256F

Other


Data Sheet

Negotiable