Pin Descriptions

No. 5877-3/14

LC72720N, 72720NM

Pin No.

Pin name

Function

I/O

Equivalent circuit

1

VREF

Reference voltage output (Vdda/2)

Output

2

MPXIN

Baseband (multiplexed) signal input

Input

5

FLOUT

Subcarrier output (filter output)

Output

6

CIN

Subcarrier input (comparator input)

Input

3

Vdda

Analog system power supply (+5 V)

—

—

4

Vssa

Analog system ground

—

—

12

XOUT

Crystal oscillator output (4.332/8.664 MHz)

Output

13

XIN

Crystal oscillator input (external reference signal input)

7

T1

Test input (This pin must always be connected to ground.)

Input

8

T2

Test input (standby control)

0: Normal operation, 1: Standby state (crystal oscillator stopped)

9

T3 (RDCL)

Test I/O (RDS clock output)

10

T4 (RDDA)

Test I/O (RDS data output)

11

T5 (RSFT)

Test I/O (soft-decision control data output)

16

T6 (ERROR/57K/BE1)

Test I/O (error status output, regenerated carrier output, error block count

I/O*

output)

17

T7 (CORREC/ARI-ID/BE0)

Test I/O (Error correction status output, SK detection output, error block count

output)

18

SYNC

Block synchronization detection output

19

RDS-ID

RDS detection output

Output

20

DO

Data output

21

CL

Clock input

22

DI

Data input

Input

23

CE

Chip enable

24

SYR

Synchronization and RAM address reset (active high)

14

Vddd

Digital system power supply (+5 V)

—

—

15

Vssd

Digital system ground

—

—

Note: * Normally function as an output pin. Used as an I/O pin in test mode, which is not available to user applications.

Serial data interface (CCB)