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AT27C2048-90JC Datasheet(PDF) 2 Page - ATMEL Corporation |
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AT27C2048-90JC Datasheet(HTML) 2 Page - ATMEL Corporation |
2 / 9 page AT27C2048 2 Description In read mode, the AT27C2048 typically consumes 15 mA. Standby mode supply current is typically less than 10 µA. The AT27C2 048 is a va ila ble i n i ndus tr y st anda rd JEDEC-approved one-time programmable (OTP) plastic PDIP, PLCC, and TSOP packages. The device features two-line control (CE, OE) to eliminate bus contention in high-speed systems. With high density 128K word storage capability, the AT27C2048 allows firmware to be stored reliably and to be accessed by the system without the delays of mass storage media. Atmel’s AT27C2048 has additional features that ensure high quality and efficient production use. The Rapid™ Pro- gramming Algorithm reduces the time required to program the part and guarantees reliable programming. Program- ming time is typically only 50 µs/word. The Integrated Prod- uct Identification Code electronically identifies the device and manufacturer. This feature is used by industry stan- dard programming equipment to select the proper program- ming algorithms and voltages. System Considerations Switching between active and standby conditions via the Chip Enable pin may produce transient voltage excursions. Unless accommodated by the system design, these tran- sients may exceed data sheet limits, resulting in device non-conformance. At a minimum, a 0.1 µF high frequency, low inherent inductance, ceramic capacitor should be uti- lized for each device. This capacitor should be connected between the VCC and Ground terminals of the device, as close to the device as possible. Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a 4.7 µF bulk electrolytic capacitor should be utilized, again connected between the VCC and Ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array. |
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