LC72121MA View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

View to exact match

LC72121MA

CMOS IC PLL Frequency Synthesizers for Electronic Tuning

SANYO -> Panasonic 

Pin Descriptions

Pin name

Pin No.

Type

LC72121MA

Function

Equivalent circuit

XIN

XOUT

1

X’tal OSC

• Crystal oscillator element connections (4.5 or 7.2 MHz)

24

FMIN

AMIN

CE

DI

CL

DO

VDD

VSSX

VSSd

BO1

BO2

BO3

BO4

IO1

IO2

• FMIN is selected when DVS in the serial data is set to 1.

• Input frequency: 10 to 160MHz

• The signal is passed through an internal divide-by-two prescaler and

Local oscillator

17

then input to the swallow counter.

signal input

• The divisor can be set to a value in the range 272 to 65535. Since the

internal divide-by-two prescaler is used, the actual divisor will be

twice the set value.

• AMIN is selected when DVS in the serial data is set to 0.

• When SNS in the serial data is set to 1:

• Input frequency: 2 to 40MHz

• The signal is input to the swallow counter directly.

• The divisor can be set to a value in the range 272 to 65535. The set

Local oscillator

16

value becomes the actual divisor.

signal input

• When SNS in the serial data is set to 0:

• Input frequency: 0.5 to 10MHz

• The signal is input to a 12-bit programmable divider directly.

• The divisor can be set to a value in the range 4 to 4095. The set

value becomes the actual divisor.

• This pin must be set high to enable serial data input (DI) or serial data

3

Chip enable

S

output (DO).

4

Input data

• Input for serial data transferred from the controller

S

• Clock used for data synchronization for serial data input (DI) and

5

Clock

S

serial data output (DO).

• Output for serial data transmitted to the controller. The content of the

6

Output data

data transmitted is determined by DOC0 through DOC2.

18

Power supply • LC72121MA power supply (VDD 2.7 to 3.6V)

-

• The power on reset circuit operates when power is first applied.

2

Ground

• Ground for the crystal oscillator circuit

-

• Ground for the LC72121MA digital systems other than those that use

15

Ground

-

VSSa or VSSX.

• Output-only ports

• The output state is determined by BO1 through BO4 in the serial data.

7

When the data value is 0: The output state will be the open circuit

8

Output port

state.

9

When the data value is 1: The output state will be a low level.

10

• A time base signal (8Hz) is output from BO1 when TBC in the serial

data is set to 1.

• Shared function I/O ports

• The pin function is determined by IOC1 and IOC2 in the serial data.

When the data value 0: Input port

When the data value 1: Output port

• When specified to function as an input port:

The input pin state is reported to the controller through the DO pin.

11

When the input state is low: The data will be 0:

I/O port

14

When the input state is high: The data will be 1:

• When specified to function as an output port:

The output state is determined by IO1 and IO2 in the serial data.

When the data value is 0: The output state will be the open circuit

state.

When the data value is 1: The output state will be a low level.

• These pins are set to input mode after a power on reset.

Continued on next page.

No.A2009-6/24

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