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| 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 14.0 0.3 10.0 0.2 34 44 1 11 22 12 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 2.15 0.1 0.05 0.15 0.1 0.8 0.35 0.1 QFP44 Applications Portable CD players Absolute Maximum Ratings (Ta=25C) Parameter Supply voltage Power dissipation Operating temperature range Storage temperature range Derating : 5mW/C for operation above Ta=25C Symbol Vcc Pd Topr Tstg Limits -0.3 ~ 4.5 500 -25 -55 ~ ~ +75 +125 Unit V mW C C Recommended Operating Conditions (Ta=25C) Parameter Symbol VCC Min. 2.7 Supply voltage Typ. 3.0 Max. 3.6 Unit V 1.2 0.15 Electrical characteristics (Unless otherwise noted; Ta=25C, VCC=3.0V) Parameter Current consumption (Shock proof mode) Current consumption (Through mode) Symbol IDD IDD Min. Typ. 8.9 1.8 Max. 20 5.0 Unit mA mA Conditions Shock proof mode Through mode Block diagram DRAM NCAS,NCAS2 A0~A10 D0~D3 YSRDATA YLRCK YSCK YFLAG NWE NRAS NOE UC1~UC5 CLK(16.9344MHz) NRESET YDMUTE CD-DSP YFCLK YBLKCK ZSRDATA ZLRCK ZSCK BU9348K YMDATA Micro controller ZSENSE YMCLK YMLD |
Price & Availability of BU9348K
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