TC9256, 57APG/AFG
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC9256APG, TC9256AFG, TC9257APG,
TC9257AFG
PLL for DTS
TC9256APG
The TC9256APG, TC9256AFG, TC9257APG and TC9257AFG
are phase-locked loop (PLL) LSIs for digital tuning systems (DTS)
with built-in two-modulus prescalers.
All functions are controlled through three serial bus lines.
These LSIs are used to configure high-performance digital
tuning systems.
Features
TC9257APG
•
Suitable for use in digital tuning systems in high-fi tuners and
car stereos.
•
Built-in prescalers operate at an input frequency ranging from
30 to 150 MHz during FM input (with two-modulus
IN
prescaler) and at 0.5 to 40 MHz during AM input (with
IN
two-modulus prescaler or direct dividing)
•
•
•
16-bit programmable counter, dual parallel output phase
comparator, crystal oscillator and reference counter
3.6 MHz, 4.5 MHz, 7.2 MHz or 10.8 MHz crystal oscillators
can be used.
TC9256AFG
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.
•
Built-in 20-bit general-purpose counter for such uses as
measuring intermediate frequencies (IF
IN1
and IF ) and
IN2
low-frequency pilot signal cycles (SC ). (No cycle
IN
measurement function is available on the TC9256APG and
TC9256AFG.)
TC9257AFG
•
•
High-precision (±0.55 to ±7.15 µs) PLL phase error detection
Numerous general-purpose I/O pins for such uses as
peripheral circuit control
•
•
Four N-channel open-drain output ports (OFF withstanding
voltage: 12 V) for such uses as control signal output.
(TC9256APG and TC9256AFG have only three ports.)
Standby mode function (turns off FM, AM and IF amps) to
save current consumption
•
•
All functions controlled through three serial bus lines
Weight
CMOS structure with operating power supply range of V
5.0 ± 0.5 V.
=
P-DIP16-300-2.54A: 1.0 g (typ.)
P-DIP20-300-2.54A: 1.24 g (typ.)
P-SOP16-300-1.27A: 0.16 g (typ.)
P-SOP20-300-1.27A: 0.48 g (typ.)
DD
•
16-pin DIP (TC9256APG), 20-pin DIP (TC9257APG), 16-pin
SOP (TC9256AFG), 20-pin SOP (TC9257AFG) packages
1
2006-07-14