NPC SM5852DS Datasheet

SM5852DS

NIPPON PRECISION CIRCUITS INC.

OVERVIEW

The SM5852DS is a digital signal processor IC that
performs XBS (extra bass system), LIVE (pseudo­sound field) and ASC (train position) processing for
use in digital audio reproduction equipment. It is
designed for use with a 44.1 kHz sampling
frequency.

FEATURES

■

2-channel processing

■

XBS/LIVE functions

■

XBS/LIVE processing bypass mode

■

ASC function ON/OFF switching

■

Input-level dependent dynamic gain characteris­tics

■

Serial input/output interface
2s complement, MSB first, 16-bit

■

384fs system clock

■

23 × 23-bit multiplier/30-bit high-precision
accumulator

■

TTL-compatible input/output

■

3.2 to 5.5 V operating voltage range

■

16-pin SOP

■

Molybdenum-gate CMOS

ORDERING INFOMATION

Digital Audio Processor LSI

PINOUT

LRCI

1

BCKI

2

DI

3

CLK

4

VSS

5

RSTN

6

TESTN

7

MUTEN

8

PACKAGE DIMENSIONS

16-pin SOP (Unit: mm)

SM5852DS

DB/DS

16

MOD2

15

MOD1

14

OPT

13

VDD

12

LRCO

11

BCKO

10

DOUT

9

0.17±0.05

Device Package

SM5852DS 16pin SOP

0.635±0.15

8.0±0.3

5.5±0.3

10.16±0.3

10.5 MAX

0.1±0.1

1.27±0.15

0.4±0.15

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2.0±0.2

0 to 15

6.8±0.3

8.0±0.3

BLOCK DIAGRAM

SM5852DS

LRCI

BCKI

DI

CLK

RSTN

TESTN

MUTEN

Input data

Interface

System

Clock

Sequence
Control

Mute

Control

DSP Block

Output data

Interface

VDD

VSS

LRCO
BCKO
DOUT

DB/DS

OPT

MOD1
MOD2

Mode Control

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PIN DESCRIPTION

SM5852DS

Number Name I/O

1 LRCI Ip Input data sample rate (fs) clock input
2 BCKI Ip Bit clock input
3 DI Ip Serial data input
4 CLK I Clock inpu t
5 VSS – Ground
6 RSTN Ip System reset initialization. Reset when LOW.
7 TESTN Ip Test mode input. Testing when LOW.
8 MUTEN Ip Mute input. Muting when LOW.

9 DOUT O Serial data output
10 BCKO O Bit clock output
11 LRCO O Output data sample rate (fs) clock output
12 VDD – 3.2 to 5.5 V supply
13 O P T Ip ASC ON/OFF switch control. OFF when HIGH, and ON when LOW.
14 MOD1 Ip
15 MOD2 Ip

16 DB/DS Ip

1. Ip = Input pin with pull-up resistor. Accordingly, they can be left open f or HIGH-level input.

1

XBS/LIVE low-pass gain select inputs. The XBS/LIVE function is bypassed when both MOD1
and MOD2 are HIGH.

LIVE ON/OFF switch control. OFF when HIGH, and ON when LOW. The LIVE function is
bypassed when both MOD1 and MOD2 are HIGH.

Description

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−

−

−

°

°

−

° C

SPECIFICATIONS

Absolute Maximum Ratings

V

= 0 V

SS

Parameter Symbol Condition Rating Unit

Supply voltage V
Input voltage V
Storage temperature T
Power dissipation P
Soldering temperature T
Soldering time t

Recommended Operating Conditions

V

= 0 V

SS

Parameter Symbol Condition Rating Unit

Supply voltage V
Operating temperature T

DD

IN

stg

D

sld

sld

DD

opr

SM5852DS

0.3 to 7.0 V

V

SS

0.3 to V

+ 0.3 V

DD

55 to 125

C
250 mW
255

C

10 s

3.2 to 5.5 V
20 to 80

DC Characteristics

Standard voltage: V

Parameter Symbol Condition

Current consumption

Input voltage for all inputs

Output voltage for all outputs

Input leakage current for all inputs
CLK input leakage current I
Input current for all inputs except CLK I

1. f

= 384fs = 16.9344 MHz, no output load, input data conformance with NPC test pattern

CLK

2. LRCI, BCKI, DI,RSTN, TESTN, MUTEN, OPT, MOD1, MOD2, DB / DS

3. LRCO, BCKO, DOUT

Low voltage: V

Parameter Symbol Condition

Current consumption

Input voltage for all inputs

Output voltage for all outputs

Input leakage current for all inputs I
CLK input leakage current I
Input current for all inputs except CLK I

1. f

= 384fs = 16.9344 MHz, no output load, input data conformance with NPC test pattern

CLK

2. LRCI, BCKI, DI,RSTN, TESTN, MUTEN, OPT, MOD1, MOD2, DB / DS

3. LRCO, BCKO, DOUT

= 4.5 to 5.5 V, V

DD

1

2

3

1

= 3.2 to 4.5 V, V

DD

1

2

3

SS

I

DD

V

IH

V

IL

V

OH

V

OL

I

LH

LL

IL

= 0 V, T

SS

I

DD

V

IH

V

IL

V

OH

V

OL

LH

LL

IL

= 0 V, T

= − 20 to 80 ° C

a

V

= 5.0 V – 16 23 mA

DD

I

= − 0.4 mA 2.5 – – V

OH

I

= 1.6 mA – – 0.4 V

OL

V

= V

IN

DD

V

= 0 V – – 1.0 µA

IN

V

= 0 V – – 20 µA

IN

= − 20 to 70 ° C

a

V

= 3.4 V – 7 10 mA

DD

I

= − 0.2 mA 2.5 – – V

OH

I

= 0.8 mA – – 0.4 V

OL

V

= V

IN

DD

V

= 0 V – – 1.0 µA

IN

V

= 0 V – – 12 µA

IN

Rating

Unit

min typ max

2.4 – – V
– – 0.5 V

– – 1.0 µA

Rating

Unit

min typ max

2.4 – – V
– – 0.5 V

– – 1.0 µA

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AC Characteristics

SM5852DS

Standard voltage: V
Low voltage: V

= 4.5 to 5.5 V, V

DD

= 3.2 to 4.5 V, V

DD

CLK (384fs)

Parameter Symbol Condition

Clock pulsewidth t
Clock cycle time t

CLK

RSTN

Parameter Symbol Condition

Reset LOW-level pulsewidth t

= 0 V, T

SS

CW

CY

RST

= 0 V, T

SS

= − 20 to 80 ° C

a

= − 20 to 70 ° C

a

tcy

Rating

min typ max

24 – 500 ns
55 59 1000 ns

VIH

1.5VDD

tCW

At power-ON 1 – – µs
At all other times 50 – 1000 ns

tCW

min typ max

VIL

Rating

Unit

Unit

3.2V

VDD

tRST 1µsec

RSTN

RSTN should be set LOW at power-ON and after
reacquiring synchronization. Note that if RSTN is
LOW for longer than 1 µs, a through-current flows in
the internal dynamic circuits because the internal
clock is stopped. The through-current has no rated
value, so the reset pulse should be kept as short as
possible at all times other than at power-ON.

tRST

1.5V

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