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Details, datasheet, quote on part number:HM51S4800ALTT
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Datasheet text preview:
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C-MOS 524288-WORD x 8-BIT DYNAMIC RAM
--TOP VIEW-- 9 20 19 18 17 16 13 12 11 10 23 8 22 7
HM51S4800ALTT (1/2) IL22
1 VDD(+5V) I/O 0 I/O 1 I/O 2 I/O 3 2 3 4 5 6 NC WE RAS A9 7 8 9
GND 28 27 I/O 7 26 I/O 6 25 I/O 5 24 I/O 4 23 CAS 22 OE NC 21 20 A8 19 A7 18 A6 17 A5 16 A4 GND 15 A INPUT 0 - A9 O CAS RE WS A E ; ; ; ; ;
A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 CAS RAS OE WE
27 I/O 7 26 I/O 6 25 I/O 5 24 I/O 4 5 I/O 3 4 I/O 2 3 I/O 1 2 I/O 0
A0 10 A1 11 A2 12 A3 13 14 VDD(+5V)
A CDDRESS OLUMN ADDRESS STROBE OUTPUT ENABLE ROW ADDRESS STROBE READ/WRITE ENABLE
INPUT/OUTPUT /O 0 - I/O 7 ; DATA
I/O 3 5 4 3 2
I/O 2
I/O 1
I/O 0
WE 7 8 RAS 9, 16-20 13-10 A9-A0
256K MEMORY ARRAY MAT D R OW ECODER
I/O 3 BUFFER I/O 2 BUFFER I/O 1 BUFFER I/O 0 BUFFER SELECTOR SELECTOR
D ROW ECODER
256K MEMORY ARRAY MAT I/O BUS & COLUMN DECODER
I/O BUS & COLUMN DECODER
256K MEMORY ARRAY MAT
D ROW ECODER
D R OW ECODER D R OW ECODER
256K MEMORY ARRAY MAT 256K MEMORY ARRAY MAT I/O BUS & COLUMN DECODER D R OW ECODER 256K MEMORY ARRAY MAT
256K MEMORY ARRAY MAT
SELECTOR SELECTOR
D ROW ECODER
I/O BUS & COLUMN DECODER
256K MEMORY ARRAY MAT
D ROW ECODER
PERIPHERAL CIRCUIT
PERIPHERAL CIRCUIT
PERIPHERAL CIRCUIT
256K MEMORY ARRAY MAT
SELECTOR
D ROW ECODER
D R OW ECODER
SELECTOR
256K MEMORY ARRAY MAT I/O BUS & COLUMN DECODER D R OW ECODER D R OW ECODER
SELECTOR
I/O BUS & COLUMN DECODER
256K MEMORY ARRAY MAT
D ROW ECODER
256K MEMORY ARRAY MAT 256K MEMORY ARRAY MAT I/O BUS & COLUMN DECODER
I/O 6 BUFFER I/O 5 BUFFER I/O 4 BUFFER
256K MEMORY ARRAY MAT
SELECTOR I/O 7 BUFFER
D ROW ECODER
I/O BUS & COLUMN DECODER
256K MEMORY ARRAY MAT
D ROW ECODER
D R OW ECODER
27 26 25 24
256K MEMORY ARRAY MAT
HM51S4800ALTT (2/2)
22 OE 23 CAS
I/O 7
I/O 6
I/O 5
I/O 4
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