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KM68257E Datasheet(PDF) 2 Page - Samsung semiconductor |
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KM68257E Datasheet(HTML) 2 Page - Samsung semiconductor |
2 / 8 page KM68257E, KM68257EI CMOS SRAM PRELIMINARY Revision 0.0 - 2 - August 1998 PIN FUNCTION Pin Name Pin Function A0 - A14 Address Inputs WE Write Enable CS Chip Select OE Output Enable I/O1 ~ I/O8 Data Inputs/Outputs VCC Power(+5.0V) VSS Ground 32K x 8 Bit High-Speed CMOS Static RAM The KM68257E is a 262,144-bit high-speed Static Random Access Memory organized as 32,768 words by 8 bits. The KM68257E uses 8 common input and output lines and has an output enable pin which operates faster than address access time at read cycle. The device is fabricated using SAMSUNG ′s advanced CMOS process and designed for high-speed circuit technology. It is particularly well suited for use in high-density high-speed system applications. The KM68257E is packaged in a 300mil 28-pin plastic SOJ or TSOP1 forward. GENERAL DESCRIPTION FEATURES • Fast Access Time 10, 12, 15ns(Max.) • Low Power Dissipation Standby (TTL) : 20mA(Max.) (CMOS) : 2mA(Max.) Operating KM68257E - 10 : 80mA(Max.) KM68257E - 12 : 80mA(Max.) KM68257E - 15 : 80mA(Max.) • Single 5.0V±10% Power Supply • TTL Compatible Inputs and Outputs • I/O Compatible with 3.3V Device • Fully Static Operation - No Clock or Refresh required • Three State Outputs • Standard Pin Configuration KM68257EJ : 28-SOJ-300 KM68257ETG : 28-TSOP1-0813. 4F Clk Gen. A0 I/O1~I/O8 CS WE OE PIN CONFIGURATION(Top View) FUNCTIONAL BLOCK DIAGRAM A1 A2 A3 A4 A5 A6 A7 A8 Data Cont. A9 A10 A11 A12 A13 A14 CLK Gen. Pre-Charge-Circuit Memory Array 512 Rows 64x8 Columns SOJ TSOP1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 OE A11 A9 A8 A13 WE Vcc A14 A12 A7 A6 A5 A4 A3 A10 CS I/O8 I/O7 I/O6 I/O5 I/O4 Vss I/O3 I/O2 I/O1 A0 A1 A2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 I/O1 I/O2 I/O3 Vss Vcc WE A13 A8 A9 A11 OE A10 CS I/O8 I/O7 I/O6 I/O5 I/O4 Column Select I/O Circuit KM68257E -10/12/15 Commercial Temp. KM68257EI -10/12/15 Industrial Temp. ORDERING INFORMATION |
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