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AT27LV256A-12RI Datasheet(PDF) 2 Page - ATMEL Corporation |
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AT27LV256A-12RI Datasheet(HTML) 2 Page - ATMEL Corporation |
2 / 9 page Standby mode supply current is typically less than 1 µA at 3.3V. The AT27LV256A is available in industry standard JEDEC-approved one-time programmable (OTP) plastic PLCC, SOIC and TSOP packages . All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention. The AT27LV256A operating with VCC at 3.0V produces TTL level outputs that are compatible with standard TTL logic devices operating at VCC = 5.0V. The device is also capable of standard 5-volt operation making it ideally suited for dual supply range systems or card products that are pluggable in both 3-volt and 5-volt hosts. Atmel’s AT27LV256A has additional features to 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 100 µs/byte. The Integrated Product Identification Code electronically identifies the de- vice and manufacturer. This feature is used by industry standard programming equipment to select the proper programming algorithms and voltages. The AT27LV256A programs exactly the same way as a standard 5V AT27C256R and uses the same programming equipment. Description (Continued) Switching between active and standby conditions via the Chip Enable pin may produce transient voltage excur- sions. Unless accommodated by the system design, these transients may exceed data sheet limits, resulting in de- vice non-conformance. At a minimum, a 0.1 µF high fre- quency, low inherent inductance, ceramic capacitor should be utilized 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 posi- tioned as close as possible to the point where the power supply is connected to the array. System Considerations 3-76 AT27LV256A |
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