MR27V6402G

4 Meg x 16 or 8 Meg x 8 Production Programmed Read Only Memory (P2ROM)


 * 4,194,304-word × 16-bit/8,388,608-word × 8-bit electrically switchable configuration
 * +3.0 V to 3.6 V power supply
 * Access time 80 ns MAX
 * Operating current 30 mA MAX
 * Standby current 10 µA MAX
 * Input/Output TTL compatible
 * Three-state output
 * [[Media:mr27v6402g.pdf]]

Oki Semiconductor's Cross Reference lists two perfect matches:
 * AMD  [[Media:am29dl640d.pdf]] datasheet
 * Fujitsu  [[Media:mbm29dl640e.pdf]] datasheet