Sanyo LC72121V Specifications

Overview

The LC72121 and the LC72121M and the LC72121V are
high input sensitivity (20 mVrms at 130 MHz) PLL
frequency synthesizers for 3 V systems. These ICs are
serial data (CCB) compatible with the LC72131, and
feature the improved input sensitivity and lower spurious
radiation (provided by a redesigned ground system)
required in high-performance AM/FM tuners.

Functions

• High-speed programmable divider
— FMIN: 10 to 160 MHz ... Pulse swallower technique

(With built-in divide-by-2
prescaler)

— AMIN: 2 to 40 MHz ... Pulse swallower technique

0.5 to 10 MHz ... Direct division technique

• IF counter
— IFIN: 0.4 to 12 MHz ... For AM and FM IF counting

• Reference frequency
— One of 12 reference frequencies can be selected

(using a 4.5 or 7.2 MHz crystal element)
1, 3, 5, 9, 10, 3.125, 6.25, 12.5, 15, 25, 50, or 100
kHz

• Phase comparator
— Supports dead zone control.
— Built-in unlocked state detection circuit
— Built-in deadlock clear circuit

• An MOS transistor for an active low-pass filter is built
in.

• I/O ports
— Output-only ports: 4 pins
— I/O ports: 2 pins
— Supports the output of a clock time base signal.

• Operating ranges
— Supply voltage: 2.7 to 3.6 V
— Operating temperature: – 40 to 85°C

• Package
— DIP22S, MFP24S, SSOP24

• Comparison with the LC72131/M
— Serial data compatible (CCB)
— Identical pin functions
— Two VSSpins were added.
— The DIP version is pin compatible (VSSpins were

inserted as the DIP22S NC pins.)

— The MFP product provides a modified pin

assignment (The MFP20 package was replaced by
an MFP24 package, and extra VSSpins were added.)

— The SSOP24 is a newly developed package that has

the same pin assignment as the MFP24S product.

CMOS IC

D3098HA(OT)/70398RM (OT) No. 5815-1/23

PLL Frequency Synthesizers for Electronic Tuning

LC72121, 72121M, 72121V

Ordering number : EN5815A

• CCB is a trademark of SANYO ELECTRIC CO., LTD.

• CCB is SANYO’s original bus format and all the bus
addresses are controlled by SANYO.

Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Package Dimensions

unit: mm

3059-DIP22S

unit: mm

3112-MFP24S

unit: mm

3175A-SSOP24

No. 5815-2/23

LC72121, 72121M, 72121V

21.2

0.95 0.48

1.71.78

3.9max

0.51min

6.4

7.62

3.3

3.25

0.25

1 11

22 12

SANYO: DIP22S

[LC72121]

1 12

24

13

12.6

0.8

1.0

0.15

0.35

5.4

6.35

7.6

0.625

1.8max

1.5

0.1

SANYO: MFP24S

[LC72121M]

1 12

13

7.6

8.0

0.5

5.6

0.1

1.6max

1.0

24

0.65

0.22

0.43

0.15

SANYO: SSOP24

[LC72121V]

Pin Assignments

Top view

No. 5815-3/23

LC72121, 72121M, 72121V

Block Diagram

No. 5815-4/23

LC72121, 72121M, 72121V

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

DD

max V

DD

–0.3 to +7.0 V

V

IN

1 max CE, DI, CL, AIN –0.3 to +7.0 V

Maximum input voltage V

IN

2 max XIN, FMIN, AMIN, IFIN –0.3 to VDD+0.3 V

V

IN

3 max IO1, IO2 –0.3 to +15 V

V

O

1 max DO –0.3 to +7.0 V

Maximum output voltage V

O

2 max XOUT, PD –0.3 to VDD+0.3 V

V

O

3 max BO1 to BO4, IO1, IO2, AOUT –0.3 to +15 V

Maximum output current

I

O

1 max DO, AOUT 0 to +6.0 mA

I

O

2 max BO1 to BO4, IO1, IO2 0 to +10.0 mA

DIP22S: 350 mW

Allowable power dissipation Pd max (Ta ≤ 85°C) MFP24S: 200 mW

SSOP24: 150 mW
Operating temperature Topr –40 to +85 °C
Storage temperature Tstg –55 to +125 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C, V

SSd

= V

SSa

= V

SSX

= 0 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Supply voltage V

DDVDD

2.7 3.6 V

Input high-level voltage

V

IH

1 CE, DI, CL 0.7 V

DD

6.5 V

V

IH

2 IO1, IO2 0.7 V

DD

13 V

Input low-level voltage V

IL

CE, DI, CL, IO1, IO2 0 0.3 V

DD

V

Output voltage

V

O

1 DO 0 6.5 V

V

O

2 BO1 to BO4, IO1, IO2, AOUT 0 13 V

f

IN

1 XIN: VIN1 1 8 MHz

f

IN

2 FMIN: VIN2 10 160 MHz

Input frequency f

IN

3 AMIN (SNS = 1): VIN3 2 40 MHz

f

IN

4 AMIN (SNS = 0): VIN4 0.5 10 MHz

f

IN

5 IFIN: VIN5 0.4 12 MHz

V

IN

1 XIN: fIN1 200 800 mVrms

V

IN

2-1 FMIN: f = 10 to 130 MHz 20 800 mVrms

V

IN

2-2 FMIN: f = 130 to 160 MHz 40 800 mVrms

Input amplitude V

IN

3 AMIN (SNS = 1): fIN3 40 800 mVrms

V

IN

4 AMIN (SNS = 0): fIN4 40 800 mVrms

V

IN

5-1 IFIN: fIN5, IFS = 1 40 800 mVrms

V

IN

5-2 IFIN: fIN5, IFS = 0 70 800 mVrms

Guaranteed crystal oscillator frequency Xtal XIN, XOUT: * 4 8 MHz

Allowable Operating Ranges at Ta = – 40 to +85°C, V

SSd

= V

SSa

= V

SSX

= 0 V

Note: Recommended value for CI for the crystal oscillator element: CI ≤ 120Ω (4.5MHz), CI ≤ 70Ω (7.2MHz)

Parameter Symbol Conditions

Ratings

Unit

min typ max

Rf1 XIN 1 MΩ

Internal feedback resistance

Rf2 FMIN 500 kΩ
Rf3 AMIN 500 kΩ
Rf4 IFIN 250 kΩ

Internal pull-down resistance

Rpd1 FMIN 100 200 400 kΩ
Rpd2 AMIN 100 200 400 kΩ

Hysteresis V

HIS

CE, DI, CL 0.1 V

DD

V

Output high-level voltage V

OH

1 PD: IO= –1 mA VDD– 1.0 V

Electrical Characteristics in the Allowable Operating Ranges

Continued on next page.

No. 5815-5/23

LC72121, 72121M, 72121V

Parameter Symbol Conditions

Ratings

Unit

min typ max

V

OL

1 PD: IO= 1 mA 1.0 V

V

OL

2

BO1 to BO4, IO1, IO2: I

O

= 1 mA 0.2 V

Output low-level voltage BO1 to BO4, IO1, IO2: I

O

= 8 mA 1.6 V

V

OL

3

DO: I

O

= 1 mA 0.2 V

DO: I

O

= 5 mA 1.0 V

V

OL

4 AOUT: IO= 1 mA, AIN = 1.3 V 0.5 V

I

IH

1 CE, DI, CL: VI= 6.5 V 5.0 µA

I

IH

2 IO1, IO2: VI= 13 V 5.0 µA

Input high-level current

I

IH

3 XIN: VI= V

DD

1.3 8 µA

I

IH

4 FMIN, AMIN: VI= V

DD

2.5 15 µA

I

IH

5 IFIN: VI= V

DD

5.0 30 µA

I

IH

6 AIN: VI= 6.5 V 200 nA

I

IL

1 CE, DI, CL: VI= 0 V 5.0 µA

I

IL

2 IO1, IO2: VI= 0 V 5.0 µA

Input low-level current

I

IL

3 XIN: VI= 0 V 1.3 8 µA

I

IL

4 FMIN, AMIN: VI= 0 V 2.5 15 µA

I

IL

5 IFIN: VI= 0 V 5.0 30 µA

I

IL

6 AIN: VI= 0 V 200 nA

Output off leakage current

I

OFF

1 BO1 to BO4, IO1, IO2, AOUT: VO= 13 V 5.0 µA

I

OFF

2 DO: VO= 6.5 V 5.0 µA

High-level 3-state off leakage current I

OFFH

PD: VO= V

DD

0.01 200 nA

Low-level 3-state off leakage current I

OFFL

PD: VO= 0 V 0.01 200 nA

Input capacitance C

IN

FMIN 6 pF

I

DD

1

V

DD

: Xtal = 7.2 MHz, fIN2 = 130 MHz,

2.5 6 mA

V

IN

2 = 20 mVrms

Supply current

V

DD

: PLL block stopped (PLL inhibit mode)

I

DD

2 Crystal oscillator operating 0.3 mA

(crystal frequency: 7.2 MHz)

I

DD

3

V

DD

: PLL block stopped, crystal oscillator

10 µA

stopped

Continued from preceding page.

Pin Descriptions

Pin

Pin No.

Type Function Equivalent circuit

name

LC72121

Xtal • Crystal oscillator element connections (4.5 or 7.2 MHz)

XIN

XOUT

1

22

1

24

LC72121M
LC72121V

Local
oscillator
signal input

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

• Input frequency: 10 to 160 MHz

• The signal is passed through an internal divide-by-two prescaler and
then input to the swallow counter.

• 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.

FMIN 16 17

Local
oscillator
signal input

• 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 40 MHz

• 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 value becomes the actual divisor.

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

• Input frequency: 0.5 to 10 MHz

• 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.

AMIN

15

16

Continued on next page.

No. 5815-6/23

LC72121, 72121M, 72121V

Continued from preceding page.

Pin

Pin No.

Type Function Equivalent circuit

name

LC72121

Chip enable

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

CE 3 3

LC72121M
LC72121V

Input data • Input for serial data transferred from the controllerDI 4 4

Clock

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

CL 5 5

Output data

• Output for serial data transmitted to the controller. The content of the
data transmitted is determined by DOC0 through DOC2.

DO 6 6

Power supply

• LC72121 power supply (V

DD

2.7 to 3.6 V)

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

——

V

DD

17 18

Ground • Ground for the crystal oscillator circuit ——

V

SSX

2 2

Ground • Ground for the low-pass filter MOS transistor ——

V

SSa

21 22

Ground

• Ground for the LC72121 digital systems other than those that use
V

SSa

or V

SSX

.

——

V

SSd

14 15

I/O port

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

IO1
IO2

11
13

11
14

Output port

• Output-only ports

• The output state is determined by BO1 through BO4 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.

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

data is set to 1.

BO1
BO2
BO3
BO4

7
8
9

10

7
8
9

10

Charge pump
output

• PLL charge pump output

A high level is output when the frequency of the local oscillator signal
divided by N is higher than the reference frequency, and a low level
is output when that frequency is lower. This pin goes to the high­impedance state when the frequencies match.

PD 18 19

Low-pass filter
amplifier
transistor

• Connections for the MOS transistor used for the PLL active low-pass

filter.

AIN

AOUT

19
20

20
21

IF counter

• The input frequency range is 0.4 to 12 MHz

• The signal is passed directly to the IF counter.

• The result is output, MSB first, through the DO pin.

• Four measurement periods are supported: 4, 8, 32, and 64 ms.

IFIN 12 13

12
23

NC — NC pin • No connection

——

Procedures for Input and Output of Serial Data

This product uses the CCB (Computer Control Bus), which is Sanyo’s audio product serial bus format, for data input and
output. This product adopts an 8-bit address CCB format.

No. 5815-7/23

LC72121, 72121M, 72121V

I/O mode

Address

Function

B0 B1 B2 B3 A0 A1 A2 A3

• Control data input (serial data input) mode

1 IN1 (82) 0 0 0 1 0 1 0 0

• 24 bits of data are input.

• See the “DI Control Data (serial data input)” section for details on the
content of the input data.

• Control data input (serial data input) mode

2 IN2 (92) 1 0 0 1 0 1 0 0

• 24 bits of data are input.

• See the “DI Control Data (serial data input)” section for details on the
content of the input data.

• Data output (serial data output) mode

3 OUT (A2) 0 1 0 1 0 1 0 0

• The number of bits output is equal to the number of clock cycles.

• See the “DO output Data (serial data output)” section for details on the
content of the output data.

Normally high
Normally low

I/O mode determined