HN27C256AG Datasheet | Hitachi Semiconductor

Description This Hitachi HN27C256AG is a 256-kbit ultraviolet erasable and electrically programmable ROM, featuring high speed and low power dissipation. Fabricated on advanced fine process and high speed circuitry technique, the HN27C256AG makes high speed access time possible for 16 bit microprocessors such as the 8086 and 68000. And low power dissipation in active and standby modes matches our CMOS 256-kbit EPROM. In programming operation, the HN27C256AG realizes faster programming times than our conventional 256-kbit EPROM by Hitachi’s Fast High-Reliability Programming Algorithm. Pin arrangement, pin configuration and programming voltage are patible with our 256-kbit EPROM series, therefore existing programmers can be used with the HN27C256AG. Features - High speed Access time: 100/120/150 ns (max) - Low power dissipation Active mode: 25 m W (typ) (f = 1 MHz) Standby mode: 5 µW (typ) - High reliability and fast programming Programming voltage: +12.5 V DC Fast High-Reliability Programming Algorithm available - Device identifier mode Manufacturer code and device code Ordering Information Type No. HN27C256AG-10 HN27C256AG-12 HN27C256AG-15 Access Time 100 ns 120 ns 150 ns Package 600-mil 28-pin cerdip (DG-28) Note: This device is not available for new application. HN27C256AG Series Pin Arrangement VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 I/O0 I/O1 I/O2 VSS 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 VCC A14 A13 A8 A9 A11 OE A10 CE I/O7 I/O6 I/O5 I/O4 I/O3 (Top View) Pin Description Pin Name A0 - A14 I/O0 - I/O7 CE OE VCC VPP VSS Function Address Input/output Chip enable Output enable Power supply Programming power supply Ground HN27C256AG Series Block Diagram X-Decoder A4 - A9 A12 - A14 512 × 512 Memory Matrix Address Input Data Control I/O0 Y-Gating Y-Decoder I/O7 CE OE VCC VPP VSS A0 - A3 A10, A11 : High Threshold Inverter HN27C256AG Series Mode...