LH6V4256 데이터 시트보기 (PDF) - Sharp Electronics
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LH6V4256 Datasheet PDF : 18 Pages
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LH6V4256
CMOS 1M (256K × 4) Dynamic RAM
OE 16
OE CLOCK
GENERATOR
WE 3
R/W CLOCK
GENERATOR
CAS 17
CAS CLOCK
GENERATOR
I/O1 I/O2 I/O3 I/O4
1
2
18 19
DATA IN
BUFFER
DATA OUT
BUFFER
VBB
GENERATOR
10 VCC
20 VSS
RAS 4
RAS CLOCK
GENERATOR
MEMORY
ARRAY
1,048,576 BITS
ROW
ADDRESS
COUNTER
REFRESH
CONTROL
ADDRESS
BUFFER
ROW
DECODER
6
7
8
9
A0
A1
A2
A3
NOTE: Pin numbers apply to the 20-pin DIP.
11 12
13
A4
A5
A6
14 15
A7
A8
Figure 4. LH6V4256 Block Diagram
6V4256-4
PIN DESCRIPTION
PIN NAME
A0 – A8
RAS
CAS
WE
OE
FUNCTION
Address input
Row address strobe
Column address strobe
Write enable
Output enable
PIN NAME
I/O1 – I/O4
VCC
VSS
NC
FUNCTION
Data input/output
Power supply (+3.3 V)
Power supply (0 V)
No connection
2-16
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