HM5117400AS7GS (1/2) IL22 ********** C-MOS 4194304 WORD·8-BIT DYNAMIC RAM — TOP VIEW — 9 1 VDD (+5V) GND 26 10 11 I/O1 2 25 I/O4 12 15 I/O2 3 24 I/O3 16 17 WE IN 4 23 CAS IN 18 19 RAS IN 5 22 OE IN 21 8 6 NC 21 A9 IN 22 23 4 A10 IN 8 19 A8 IN A0 IN 9 18 A7 IN A1 IN 10 17 A6 IN A2 IN 11 16 A5 A3 IN 12 15 A4 IN 13 VDD (+5V) GND 14 IN 5 A0 I/O1 A1 I/O2 A2 I/O3 A3 I/O4 2 3 24 25 A4 A5 A6 A7 A8 A9 A10 OE CAS WE RAS INPUT A0 - A10 CAS OE RAS WE ; ADDRESS ; COLUMN ADDRESS STROBE ; OUTPUT ENABLE ; ROW ADDRESS STROBE ; READ/WRITE ENABLE INPUT/OUTPUT I/O1 - I/O4 ; DATA HM5117400AS7GS (2/2) RAS CAS WE OE RAS CONT. CIRCUIT CAS CONT. CIRCUIT WE CONT. CIRCUIT OE CONT. CIRCUIT 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS ROW DECODER & DRIVER 256K MEMORY CELL ARRAY I/O 3 I/O 2 BUFFER I/O 2 I/O 1 BUFFER I/O 1 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY COLUMN DECODER & DRIVER COLUMN DECODER & DRIVER 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY I/O 3 BUFFER 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS I/O 4 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY I/O 4 BUFFER ROW DECODER & DRIVER 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY SENSE AMP. & I/O BUS SENSE AMP. & I/O BUS 256K MEMORY CELL ARRAY 256K MEMORY CELL ARRAY COLUMN ADDRESS BUFFER ROW ADDRESS BUFFER ADDRESS A0-A10