Description
The AT27C256R is a low-power, high-performance 262,144-bit one-time programmable read-only memory (OTP EPROM) organized 32K by 8 bits. It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 45 ns, eliminating the need for speed reducing WAIT states on high-performance microprocessor systems.

FEATUREs
• Fast Read Access Time – 45 ns
• Low-Power CMOS Operation
   – 100 µA Max Standby
   – 20 mA Max Active at 5 MHz
• JEDEC Standard Packages
   – 28-lead PDIP
   – 32-lead PLCC
   – 28-lead TSOP and SOIC
• 5V ± 10% Supply
• High Reliability CMOS Technology
   – 2,000V ESD Protection
   – 200 mA Latchup Immunity
• Rapid Programming Algorithm – 100 µs/Byte (Typical)
• CMOS and TTL Compatible Inputs and Outputs
• Integrated Product Identification Code
• Industrial and Automotive Temperature Ranges
• Green (Pb/Halide-free) Packaging Option