D1723GF View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

D1723GF

PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER (CAR AUDIO)

NEC => Renesas Technology 

µPD1723GF-013, µPD1723GF-213

PIN DESCRIPTIONS

PIN No.

1

2

3

4

8

5

SYMBOL

NC

EO1

EO2

VDD1

VDD2

AM

PIN NAME

DESCRIPTION

OUTPUT

TYPE

No

This pin is not connected to the internal chip. There-

—

connection fore, leave it open or connect it to GND, VDD, etc.

Error out

PLL (Phase Locked Loop) error output pins.

When the frequency obtained by dividing the local

oscillation frequency (VCO output) is higher than the

reference frequency, High level is output from these

pins. When it is lower than the reference frequency,

Low level is output from these pins. When the two fre-

quencies are the same, these pins are floated.

This output is input to an external LPF (Low Pass Filter)

and is applied to a varactor diode through the LPF. EO1

and EO2 output the same waveform so that the pin to

be used can be freely selected. When the radio is OFF,

these pins are floated.

CMOS

3-state

Device power supply input pin.

This pin supplies 5 V ±10 % power voltage during

device operation (radio, tape, and CD modes). When

the diode matrix NOCLK switch is 1 (shorted by diode),

when the CE pin (pin 7) is made Low level, this pin

Power

drops to 2.5 V and data hold is enabled. When a voltage

—

supply input of 0 → 4.5 V is supplied to this pin, the data is initialized.

Supply 0 → 4.5 V to this pin within 500 ms.

Always connect pins 4 and 8 to the same potential. VDD1

(pin 4) is the analog system (PLL, A/D converter, INT,

CE) power supply and VDD2 (pin 8) is the digital system

(CPU, LCD driver, IF counter) power supply.

AM local

oscillation

input

The AM (MW and LW band) local oscillation output

(VCO output) is input to this pin. When the radio is

turned on and the MW or LW band is received, this pin

becomes active. Otherwise, it is pulled down

internally.

The input amplitude is 0.3 VP-P MIN.

Since there is an on-chip AC amplifier, block the DC

component with a capacitor.

Input

5

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