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BA1604F

Rohm
Part Number BA1604F
Manufacturer Rohm
Description PLL tone decoder IC
Published Apr 1, 2005
Detailed Description Communication ICs PLL tone decoder IC BA1604 / BA1604F The BA1604 and BA1604F are tone decoder ICs that enable the freq...
Datasheet PDF File BA1604F PDF File

BA1604F
BA1604F

Overview
Communication ICs PLL tone decoder IC BA1604 / BA1604F The BA1604 and BA1604F are tone decoder ICs that enable the frequency to be selected in precise detail, using a PLL system.
These ICs are configured of a PLL circuit, a detection circuit, a voltage comparator circuit and an output logic drive circuit.
When the input signal is within the transmission range of the circuit, PLL is synchronized (locked) to the input signal.
At this point, the output voltage of the decoder drops, and the change turns on the transistors for the voltage comparator and output logic drive circuits.
A load of up to 100mA can be driven.
The center frequency (f0) of the decoder is set by the mobile oscillation frequency of the current control oscillator.
This frequency is determined by selecting a CR connected to Pins 5 and 6.
FApplications Telephones Data communication systems Remote control systems FFeatures 1) The detection bandwidth can be varied independently between 0 and 14%.
2) The output circuit can withstand a load current of up to 100mA, and is directly coupled to the logic circuit.
3) The center frequency offers a high level of stability.
4) High out-of-band signal and noise rejection capability.
5) Frequency can be changed over a range of 20 : 1 using an external resistor.
6) Compatible with EXAR XR-567 and Signetics NE567.
FBlock diagram 212 Communication ICs FAbsolute maximum ratings (Ta=25_C) BA1604 / BA1604F FRecommended operating conditions (Ta=25_C) FElectrical characteristics (unless otherwise noted, Ta=25_C, VCC=5V) 213 Communication ICs FMeasurement circuit FApplication example BA1604 / BA1604F FAttached components (1) C1 and R1 : Setting f0 The center frequency (f0) is determined by the resistor R1 between Pins 5 and 6, and the capacitor C1 between Pin 6 and the ground.
The constants at this point are determined as follows : f0 1 C1R1 (kHz) (C : µ F, R : kΩ) A rectangular-wave voltage is output at Pin 5; the peakto-peak amplitude is between VCC and 1.
4 V...


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