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Details, datasheet, quote on part number:HM51S4260ALT
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Datasheet text preview:
HM51S4260ALT (1/2) IL22
C-MOS (262,144 x 16)-BIT DYNAMIC RAM
--TOP VIEW--
26 39 38 37 36 34 33 32 31 10 9 8 7 5 4 3 2
1 VDD I/O0 I/O1 I/O2 I/O3 2 3 4 5 6 VDD I/O4 I/O5 I/O6 7 8 9
GND 40 39 I/O15 38 I/O14 37 I/O13 36 I/O12
A8 A7 A6 A5 A4 A3 A2 A1 A0
I/O15 I/O14 I/O13 I/O12 I/O11 I/O10 I/O9 I/O8 I/O7 I/O6
25 24 23 22 19 18 17 16
14
GND 35 34 I/O11
RAS UCAS LCAS
I/O5 I/O4 I/O3 I/O2
28 29
27
33 I/O10 32 I/O9 31 I/O8
OE WE
I/O1 I/O0
13
I/O7 10
A INPUT 0 - A8
: ADDRESS COLUMN ADDRESS STROBE OUTPUT ENABLE ROW ADDRESS STROBE COLUMN ADDRESS STROBE READ/WRITE ENABLE
11 NC 12 NC
NC 30 29 LCAS IN 28 UCAS IN 27 OE IN 26 A8 IN 25 A7 IN 24 A6 IN 23 A5 IN 22 A4 IN GND 21
LCAS OE RAS UCAS WE
: : : : : : INPUT/OUTPUT /O0 - I/O15 DATA
WE IN 13 RAS IN 14
15 NC A0 IN 16 A1 IN 17 A2 IN 18 A3 IN 19 20 VDD
I/O7 9 2 8 7 5 4 3 10
I/O6
I/O5
I/O4
I/O3
I/O2
I/O1
I/O0
RAS WE
14 13 16 - 19, 22 - 26
A0 - A8
I/O7 BUFFER
I/O6 BUFFER
I/O5 BUFFER
I/O4 BUFFER
I/O3 BUFFER
I/O2 BUFFER
I/O1 BUFFER
I/O0 BUFFER
256 K MEMORY ARRAY MAT D ROW ECODER SELECTOR SELECTOR
D ROW ECODER
256 K MEMORY ARRAY MAT I/O BUS & COLUMN DECODER
I/O BUS & COLUMN DECODER
256 K MEMORY ARRAY MAT
D ROW ECODER
D ROW ECODER D ROW ECODER
256 K MEMORY ARRAY MAT 256 K MEMORY ARRAY MAT I/O BUS & COLUMN DECODER D ROW ECODER 256 K MEMORY ARRAY MAT
256 K MEMORY ARRAY MAT SELECTOR SELECTOR
D ROW ECODER
I/O BUS & COLUMN DECODER
256 K MEMORY ARRAY MAT
D ROW ECODER
PERIPHERAL CIRCUIT
PERIPHERAL CIRCUIT
PERIPHERAL CIRCUIT
256 K MEMORY ARRAY MAT SELECTOR
D ROW ECODER
D ROW ECODER SELECTOR
256 K MEMORY ARRAY MAT I/O BUS & COLUMN DECODER D ROW ECODER D ROW ECODER SELECTOR 256 K MEMORY ARRAY MAT 256 K MEMORY ARRAY MAT I/O BUS & COLUMN DECODER I/O9 BUFFER I/O8 BUFFER
I/O BUS & COLUMN DECODER
256 K MEMORY ARRAY MAT
D ROW ECODER
256 K MEMORY ARRAY MAT SELECTOR
D ROW ECODER
I/O BUS & COLUMN DECODER I/O15 BUFFER I/O14 BUFFER
I/O13 BUFFER
I/O12 BUFFER
I/O11 BUFFER
I/O10 BUFFER
256 K MEMORY ARRAY MAT
27 28 29
D ROW ECODER
D ROW ECODER
256 K MEMORY ARRAY MAT
38
37
36
34
33
32
31
39
LCAS
HM51S4260ALT (2/2)
UCAS OE
I/O9
I/O8
I/O15
I/O14
I/O13
I/O12
I/O11
I/O10
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