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Tài liệu tham khảo chuyên ngành điện tử bằng tiếng anh | LH51256L CMOS 256K 32K X 8 static RAM FEATURES 32 768 X 8 bit organization Access times 100 120 ns MAX. Power consumption Operating 248 mW MAX. Ta -40 to 85 c minimum cycle Standby 5.5 pW MAX. Ta 0 to 60 C Fully-static operation TTL compatible I O Three-state outputs Single 5 V power supply Packages 28-pin 600-mil DIP 28-pin 450-mil SOP DESCRIPTION The LH51256L is a 256K bit static RAM organized as 32 768 X 8 bits which provides low-power standby mode. It is fabricated using silicon-gate CMOS process technology. Figure 1. Pin Connections tor DIP and SOP Packages Figure 2. LH51256L Block Diagram PIN DESCRIPTION SIGNAL PIN NAME Ao - A-I4 Address input ÕẼ Chip Enable input WE Write Enable input ÕẼ Output Enable input SIGNAL PIN NAME I O1 - l Oa Data Input Output Vcc Power supply GND Ground TRUTH TABLE CE WE ÕẼ MODE l Oi I Os SUPPLY CURRENT NOTE H X X Non selected High-Z Standby Isb 1 L L X Write Din Operating Ice 1 L H L Read Dout Operating Ice L H H Output disable High-Z Operating Ice NOTE 1. X H or L ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATING UNIT NOTE Supply voltage Vcc -0.3 to 7.0 V 1 Input voltage V N -0.3 to 7.0 V 1 Operating temperature Topr -40 to 85 C Storage temperature Tstg -55 to 150 C NOTE 1. The maximum applicable voltage on any pin with respect to GND. RECOMMENDED OPERATING CONDITIONS Ta -40 to 85 C PARAMETER SYMBOL MIN. TYP. MAX. UNIT Supply voltage Vcc 4.5 5.0 5.5 V Input voltage VlH 2.2 Vcc 0.3 V ViL -0.3 0.8 V DC CHARACTERISTICS Vcc 5 V 10 Ta -40 to 85 C PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT Input leakage current Hư I Vcc 5.5 V V N 0 to Vqg 1 pA Output leakage current I Ilo I ÕẼorÕẼ Vih V O 0 to Vcc 1 pA Operating current Icc ÕẼ V L Outputs open 45 mA Standby current IsB1 CE V H 10 mA Isa CE VCC-0.2V Ta 0 to 60 C 1 pA ÕẼă Vcc- 0.2 V Ta -40 to 85 c 5 pA Output voltage Vol Iql 2.1 mA 0.4 V Voh Ioh -1-0 mA 2.4 V AC CHARACTERISTICS 1 READ CYCLE Vcc 5 V 10 Ta -40 to 85 C PARAMETER SYMBOL LH51256 N-10L LH51256 N-12L UNIT NOTE MIN. MAX. .
