| Density | 2M |
| Organization | 256K x 8 |
| Speed | 55，90 ns |
| Vcc (V) | 5 |
| Packages | TSOP 32 VSOP 32 PLCC 32 |
| Pb-Free Packages | TSOP 32 PLCC 32 |
2M bit EPROM
The AT27C020 is a low-power, high-performance, 2,097,152-bit, one-time programmable read-only memory (OTP EPROM) organized as 256K by 8 bits. It requires only one 5V power supply in normal read mode operation. Any byte can be accessed in less than 55 ns, eliminating the need for speed-reducing WAIT states on highperformance microprocessor systems. In read mode, the AT27C020 typically consumes 8 mA. Standby mode supply current is typically less than 10 μA.
The AT27C020 is available in a choice of industry-standard JEDEC-approved onetime programmable (OTP) plastic PDIP, PLCC and TSOP packages. All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention. With 256K bytes storage capability, the AT27C020 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media. Atmel’s AT27C020 has additional features to ensure high quality and efficient production use. The Rapid Programming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 100 μs/byte. The Integrated Product Identification Code electronically identifies the device and manufacturer. This feature is used by industry-standard programming equipment to select the proper programming algorithms and voltages.
| Ordering Code | Package | ICC (mA) VCC = 3.6V |
tACC (ns) |
Operation Range | |
| Active | AStandby | ||||
| AT27C020-55JU AT27C020-55PU AT27C020-55TU |
32J 32P6 32T |
25 | 0.1 | 55 | Industrial (-40°C to +85°C) |
| AT27C020-90JU AT27C020-90PU AT27C020-90TU |
32J 32P6 32T |
90 | |||