TMS27C256 Datasheet | Texas Instruments

D Organization . . . 32768 by 8 Bits D Single 5-V Power Supply D Pin patible With Existing 256K MOS ROMs, PROMs, and EPROMs D All Inputs / Outputs Fully TTL patible D Max Access / Min Cycle Time VCC ± 10% ’27C/ PC256-10 100 ns ’27C/ PC256-12 120 ns ’27C/ PC256-15 150 ns ’27C/ PC256-17 170 ns ’27C/ PC256-20 200 ns ’27C/ PC256-25 250 ns D Power Saving CMOS Technology D Very High-Speed SNAP! Pulse Programming D 3-State Output Buffers D 400-m V Minimum DC Noise Immunity With Standard TTL Loads D Latchup Immunity of 250 m A on All Input and Output Lines D Low Power Dissipation ( VCC = 5.5 V ) - Active . . . 165 m W Worst Case - Standby . . . 1.4 m W Worst Case (CMOS Input Levels) D Temperature Range Options D 256K EPROM Available With MIL-STD-883C Class B High Reliability Processing (SMJ27C256) description The TMS27C256 series are 32 768 by 8-bit (262 144-bit), ultraviolet (UV) light erasable, electrically programmable read-only memories (EPROMs). The TMS27PC256 series are 32 768 by 8-bit (262 144-bit), one-time programmmable (OTP) electrically programmable read-only memories (PROMs). TMS27C256 32768 BY 8-BIT UV ERASABLE TMS27PC256 32768 BY 8-BIT PROGRAMMABLE READ-ONLY MEMORIES SMLS256H- SEPTEMBER 1984 - REVISED NOVEMBER 1997 J PACKAGE ( TOP VIEW ) VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 VCC 27 A14 26 A13 25 A8 24 A9 23 A11 22 G 21 A10 20 E 19 DQ7 18 DQ6 17 DQ5 16 DQ4 15 DQ3 FM PACKAGE ( TOP VIEW ) A7 A12 VPP NU VCC A14...