Description
The AT27BV400 is a high performance low-power, low-voltage 4,194,304-bit one time programmable read only memory (OTP EPROM) organized as either 256K by 16 or 512K by 8 bits. It requires only one supply in the range of 2.7 to 3.6V in normal read mode operation. The by-16 organization makes this part ideal for portable and hand held 16- and 32-bit microprocessor systems using either regulated or unregulated battery power.

Features
• Fast Read Access Time - 120 ns
• Word-wide or Byte-wide Configurable
• Dual Voltage Range Operation
    – Unregulated Battery Power Supply Range, 2.7V to 3.6V or Standard 5V ± 10% Supply Range
• 4-Megabit Flash and Mask ROM Compatable
• Low Power CMOS Operation
    – 20 µA Maximum Standby
    – 10 mA Max. Active at 5 MHz for VCC = 3.6V
• JEDEC Standard Packages
    – 44-Lead PLCC
    – 44-Lead SOIC (SOP)
    – 48-Lead TSOP (12 mm x 20 mm)
• High Reliability CMOS Technology
    – 2,000 ESD Protection
    – 200 mA Latchup Immunity
• Rapid™ Programming Algorithm - 50 µs/word (typical)
• CMOS and TTL Compatible Inputs and Outputs
    – JEDEC Standard for LVTTL and LVBO
• Integrated Product Identification Code
• Commercial and Industrial Temperature Ranges