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Details, datasheet, quote on part number:NN514256J-45-T
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Datasheet text preview:
********** C-MOS 1M (262,144 x 4)-BIT DYNAMIC RAM
--TOP VIEW--
18 A8 A7 A6 A5 A4 A3 A2 A1 R0 I/O4 I/O3 I/O2 /O1 25 2 4 1
I NN514256J-45-T L22
I/O1 I/O 1 N 2 I/O2 I/O 3 WE IN 4 RAS IN 5 A 9 VC
GND 26 I 25 /O4 I/O 24 I/O3 I/O 23 CAS IN 12 OE IN A
17 16 15 14 12 11 90 4
2 33 2
CAS WS A OE E
0 IN 1 A1 IN 10 A2 IN 11 A3 IN 12 3
DD(+5V)
18
8 IN
2
17 A7 IN 16 A6 IN 15 A5 IN 24 A4 IN A INPUT 0 - A8 ; ADDRESS ; COLUMN ADDRESS STROBE ; OUTPUT ENABLE ; ROW ADDRESS STROBE ; WRITE ENABLE I ; INPUT/OUTPUT /O1 - I/O4 DATA
CAS OE RAS WE
RAS
4
G
CRAS LOCK ENERATOR
G
CCAS LOCK ENERATOR
G
C WE LOCK ENERATOR
3
WE
CAS
23
C EFRESH R OUNTER
DCOLUMN ECODERS A SENSE &MPLIFIERS I/O LOGIC DI TA A B /O UFFERS
2
2 1
I/O1 I/O2 I/O3 O4 /O
A0 A1 A2 A3 A4 A5 A6 A7 8
1 9 10 11 12 14 15 16 17 8
24 25
ADDRESS B UFFERS D ROW ECODERS MEMORY A ( RRAY 1,048,576) SUBB TRATE S G IAS ENERATOR
2
E
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