SM5852CS
NIPPON PRECISION CIRCUITS INC.
Dynamic Range Compression LSI
OVERVIEW
The SM5852CS is a digital signal processor IC that
performs dynamic range compression for use in
digital audio reproduction equipment. It is designed
for use with a 44.1 kHz sampling frequency.
PINOUT
LRCI
BCKI
DI
CLK
VSS
RSTN
TESTN
MUTEN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
DB/DS
MOD2
MOD1
OPT
VDD
LRCO
BCKO
DOUT
SM5852CS
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
2-channel processing
6
input-level
dependent
dynamic
gain
characteristics
Dynamic range compression bypass mode
2 attack time settings
Soft muting function
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
PACKAGE DIMENSIONS
16-pin SOP (Unit: mm)
ORDERING INFOMATION
Device
SM5852CS
Package
16pin SOP
6.8±0.3
0˚ to 15˚
2.0±0.2
0.1±0.1
5.5±0.3
8.0±0.3
8.0±0.3
0.17±0.05
10.16±0.3
10.5 MAX
0.635±0.15
1.27±0.15
0.4±0.15
NIPPON PRECISION CIRCUITS—1
SM5852CS
BLOCK DIAGRAM
LRCI
BCKI
DI
Input data
Interface
DSP Block
System
Clock
VDD
VSS
CLK
RSTN
TESTN
Sequence
Control
Output data
Interface
LRCO
BCKO
DOUT
MUTEN
Mute
Control
DB/DS
OPT
MOD1
MOD2
Mode Control
NIPPON PRECISION CIRCUITS—2
SM5852CS
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
Name
LRCI
BCKI
DI
CLK
VSS
RSTN
TESTN
MUTEN
DOUT
BCKO
LRCO
VDD
OPT
I/O
1
Ip
Ip
Ip
I
–
Ip
Ip
Ip
O
O
O
–
Ip
Input data sample rate (fs) clock input
Bit clock input
Serial data input
Clock input
Ground
System reset initialization. Reset when LOW.
Test mode input. Testing when LOW.
Mute input. Muting when LOW.
Serial data output
Bit clock output
Output data sample rate (fs) clock output
3.2 to 5.5 V supply
Attack time switch input. Attack-1 when HIGH, and attack-2 when LOW.
Gain characteristics switch inputs.
14
MOD1
Ip
DB/DS
LOW
LOW
15
MOD2
Ip
LOW
LOW
HIGH
HIGH
16
DB/DS
Ip
HIGH
HIGH
MOD2
LOW
LOW
HIGH
HIGH
LOW
LOW
HIGH
HIGH
MOD1
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
Compression mode
6
5
4
Off
3
2
1
Off
Description
1. Ip = Input pin with pull-up resistor. Accordingly, they can be left open for HIGH-level input.
NIPPON PRECISION CIRCUITS—3
SM5852CS
SPECIFICATIONS
Absolute Maximum Ratings
V
SS
= 0 V
Parameter
Supply voltage
Input voltage
Storage temperature
Power dissipation
Soldering temperature
Soldering time
Symbol
V
DD
V
IN
T
stg
P
D
T
sld
t
sld
Condition
Rating
−0.3
to 7.0
V
SS
−
0.3 to V
DD
+ 0.3
−40
to 125
250
255
10
Unit
V
V
°C
mW
°C
s
Recommended Operating Conditions
V
SS
= 0 V
Parameter
Supply voltage
Operating temperature
Symbol
V
DD
T
opr
Condition
Rating
3.2 to 5.5
−35
to 85
Unit
V
°C
DC Characteristics
Standard voltage: V
DD
= 4.5 to 5.5 V, V
SS
= 0 V, T
a
=
−35
to 85
°C
Rating
Parameter
Current consumption
1
Input voltage for all inputs
Symbol
I
DD
V
IH
V
IL
Output voltage for all outputs
Input leakage current for all inputs
CLK input leakage current
Input current for all inputs except CLK
V
OH
V
OL
I
LH
I
LL
I
IL
I
OH
=
−0.4
mA
I
OL
= 1.6 mA
V
IN
= V
DD
V
IN
= 0 V
V
IN
= 0 V
Condition
min
V
DD
= 5.0 V
–
2.4
–
2.5
–
–
–
–
typ
16
–
–
–
–
–
–
–
max
23
–
0.5
–
0.4
1.0
1.0
20
mA
V
V
V
V
µA
µA
µA
Unit
1. f
CLK
= 384fs = 16.9344 MHz, no output load, input data conformance with NPC test pattern
Low voltage: V
DD
= 3.2 to 4.5 V, V
SS
= 0 V, T
a
=
−20
to 70
°C
Rating
Parameter
Current consumption
1
Input voltage for all inputs
Symbol
I
DD
V
IH
V
IL
Output voltage for all outputs
Input leakage current for all inputs
CLK input leakage current
Input current for all inputs except CLK
V
OH
V
OL
I
LH
I
LL
I
IL
I
OH
=
−0.2
mA
I
OL
= 0.8 mA
V
IN
= V
DD
V
IN
= 0 V
V
IN
= 0 V
Condition
min
V
DD
= 3.4 V
–
2.4
–
2.5
–
–
–
–
typ
7
–
–
–
–
–
–
–
max
10
–
0.5
–
0.4
1.0
1.0
12
mA
V
V
V
V
µA
µA
µA
Unit
1. f
CLK
= 384fs = 16.9344 MHz, no output load, input data conformance with NPC test pattern
NIPPON PRECISION CIRCUITS—4
SM5852CS
AC Characteristics
Standard voltage: V
DD
= 4.5 to 5.5 V, V
SS
= 0 V, T
a
=
−35
to 85
°C
Low voltage: V
DD
= 3.2 to 4.5 V, V
SS
= 0 V, T
a
=
−20
to 70
°C
CLK (384fs)
Rating
Parameter
Clock pulsewidth
Clock cycle time
Symbol
t
CW
t
CY
Condition
min
24
55
typ
–
59
max
500
1000
ns
ns
Unit
t
cy
CLK
V
IH
1.5V
t
CW
RSTN
t
CW
V
IL
Rating
Parameter
Symbol
Condition
min
At power-ON
Reset LOW-level pulsewidth
t
RST
At all other times
1
50
typ
–
–
max
–
1000
µs
ns
Unit
3.2V
VDD
t
RST
≥
1µsec
t
RST
RSTN
1.5V
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.
NIPPON PRECISION CIRCUITS—5
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