UPD424260G5-70-7JF

∗∗∗∗∗ UPD424260G5-70-7JF(1/2) IL16 C-MOS 4M (262,144 x 16) BIT DYNAMIC RAM -TOP VIEW18 A0 A1 A2 A3 A4 A5 A6 A7 A8 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 I/O8 I/O9 I/O10 I/O11 16 30 RAS UCAS LCAS WE OE I/O12 I/O13 I/O14 I/O15 I/O16 2 3 4 5 7 8 9 10 35 36 37 38 40 41 42 43 1 I/O1 IN/OUT 2 I/O2 IN/OUT 3 I/O3 IN/OUT 4 I/O4 IN/OUT 5 6 I/O5 IN/OUT 7 I/O6 IN/OUT 8 I/O7 IN/OUT 9 I/O8 IN/OUT 10 VDD (+5V) GND 44 43 I/O16 IN/OUT 42 I/O15 IN/OUT 41 I/O14 IN/OUT 40 I/O13 IN/OUT 19 20 21 24 25 26 27 28 VDD (+5V) GND 39 38 I/O12 IN/OUT 37 I/O11 IN/OUT 36 I/O10 IN/OUT 35 I/O9 IN/OUT 31 15 29 13 NC 14 NC WE IN 15 RAS IN 16 17 NC A0 IN 18 A1 IN 19 NC 32 31 LCAS IN 30 UCAS IN 29 OE IN 27 A7 IN 26 A6 IN 25 A5 IN 24 A4 IN VDD (+5V) GND 23 A0-8 ; ADDRESS INPUTS I/O1-16 ; DATA INPUTS/OUTPUTS RAS ; ROW ADDRESS STROBE INPUT UCAS ; COLUMN ADDRESS STROBE (UPPER) INPUT LCAS ; COLUMN ADDRESS STROBE (LOWER) INPUT WE ; WRITE ENABLE INPUT OE ; OUTPUT ENABLE INPUT w w A2 IN 20 w A3 IN 21 .D 22 at aS he et 4U .c om www.DataSheet4U.com 28 A8 IN UPD424260G5-70-7JF(2/2) 16 RAS LCAS UCAS WE 31 30 15 CLOCK GENERATOR LOWER BYTE CONTROL 29 OE UPPER BYTE CONTROL CAS BEFORE RAS COUNTER ROW DECODER DATA OUTPUT BUFFER I/O1 | I/O8 (LOWER BYTE) DATA INPUT BUFFER A0 | A8 ROW ADDRESS BUFFER COLUMN ADDRESS BUFFER MEMORY CELL ARRAY 512 x 512 x 16 512 x 16 SENSE AMPLIFIER 512 COLUMN DECODER X 16 X0-X8 512 DATA OUTPUT BUFFER I/O9 | I/O16 (UPPER BYTE) DATA INPUT BUFFER Y0-Y8 ...