| Time, Access | 90 ns | 
| Voltage, Programmable | 5 V | 
| Capacitance, Input | 4 pF | 
| Memory Capacity | 2 Mbit | 
| Temperature Operating Range | -40 to +85 °C | 
| Organization | 256K x 8 | 
| Voltage, Output, High Level | 2.4 V (Read) | 
| Voltage, Input, High Level | 5.5 V (Read) | 
| Operating Voltage Range | Maximum of 5 V | 
| Current, Output, Leakage | ±5 μA | 
| Density | 2M | 
| Fall Time | 20 ns | 
| Memory Type | EPROM | 
| Voltage, Output, Low Level | 0.4 V (Read) | 
| Current, Input, Leakage | ±1 μA | 
| Number of Pins | 32 | 
| Supply Voltage | 5 V | 
| Height | 0.19" (4.826mm) | 
| Maximum Operating Temperature | +85 °C | 
| Width | 0.55" (13.97mm) | 
| Time, Address Setup | 2 μs | 
| Operating Temperature | -40 to +85 °C | 
| Current, Operating | 25 mA (Read) | 
| In System Programmability | External | 
| Time, Fall | 20 ns | 
| Dimensions | 42.291 x 13.970 x 4.826 mm | 
| Number of Bits per Word | 8 bit | 
| Product Header | AT27C020 Series OTP EPROM Memory | 
| Mounting Type | Surface Mount | 
| Minimum Operating Temperature | -40 °C | 
| Package Type | PLCC | 
| Series | AT27 Series | 
| Capacitance, Output | 8 pF | 
| Voltage, Input, Low Level | 0.8 V (Read) | 
| Rise Time | 20 | 
| Length | 1.665" (42.291mm) | 
| Time, Address Hold | 0 μs | 
| Voltage, ESD | 2000 V | 
| Reprogramming Technique | OTP | 
| Interface | Parallel Bus |