BU9348K Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – RAM controller for CD player

RAM controller for CD player
BU9348K
Description
The BU9348K is an IC incorporating function that
can protect pop noise electrically by using DRAM
together for CD players. This IC is available for four
types of DRAM. Four shockproof mode(4bit, 5bit,
6bit, non-compression) and through mode can be
selected.
Dimension (Unit : mm)
14.0 ± 0.3
10.0 ± 0.2
33
23
34
22
44
1
12
11
0.15 ± 0.1
Features
1) Available for 4 types of DRAM
(16MDRAM, 4MDRAMx2, 4MDRAM, 1MDRAM)
2) Four shockproof mode(4bit, 5bit, 6bit, non-compression)
and through mode selectable
3) Available for x4 speed(Max.)
4) Built-in digital attenuator and soft mute function
5) Built-in extended I/O function
0.8
0.35 ± 0.1
0.15
QFP44
Applications
Portable CD players
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Symbol
Limits
Unit
Supply voltage
Vcc
Power dissipation
Pd
Operating temperature range Topr
Storage temperature range
Tstg
∗Derating : 5mW/˚C for operation above Ta=25˚C
-0.3 ~ 4.5
V
500 ^∗
mW
-25 ~ +75
˚C
-55 ~ +125
˚C
Recommended Operating Conditions (Ta=25˚C)
Parameter
Symbol Min. Typ. Max. Unit
Supply voltage
VCC
2.7
3.0
3.6
V