Electronic Components Datasheet Search |
|
AT27C800-10RC Datasheet(PDF) 2 Page - ATMEL Corporation |
|
AT27C800-10RC Datasheet(HTML) 2 Page - ATMEL Corporation |
2 / 10 page AT27C800 2 The AT27C800 can be organized as either word-wide or byte-wide. The organization is selected via the BYTE/V PP pin. When BYTE/V PP is asserted high (VIH), the word-wide organization is selected and the O15/A-1 pin is used for O15 data output. When BYTE/V PP is asserted low (VIL),the byte wide organization is selected and the O15/A-1 pin is used for the address pin A-1. When the AT27C800 is logi- cally regarded as x16 (word-wide), but read in the byte- wide mode, then with A-1=V IL the lower eight bits of the 16 bit word are selected with A-1 =V IH the upper 8 bits of the 16-bit word are selected. In read mode, the AT27C800 typically consumes 15 mA. Standby mode supply current is typically less than 10 µA. The AT27C800 is available in industry standard JEDEC- approved one-time programmable (OTP)PDIP, SOIC (SOP), and TSOP as well as UV erasable windowed Cer- dip packages. The device features two-line control(CE,OE) to eliminate bus contention in high-speed systems. With high density 512K word or 1024K-bit storage capabil- ity, the AT27C800 allows firmware to be to be stored reli- ably and to be accessed by the system without the delays of mass storage media. Atmel’s AT27C800 has additional features that ensure high quality and efficient production use. The Rapid TM Program- ming Algorithm reduces the time required to program the part and guarantees reliable programming. Programming time is typically only 50 µs/word. 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 equipment and voltages. Erasure Characteristics The entire memory array of the AT27C800 is erased (all outputs read as V OH) after exposure to ultraviolet light at a wavelength of 2,537Å. Complete erasure is assured after a minimum of 20 minutes of exposure using 12,000 µW/cm2 intensity lamps spaced one inch away from the chip. Mini- mum erase time for lamps at other intensity ratings can be calculated from the minimum integrated erasure dose of 15 W.sec/cm 2. To prevent unintentional erasure, an opaque label is recommended to cover the clear window on any UV erasable EPROM that will be subjected to continuous flourescent indoor lighting or sunlight. 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 V CC 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 V CC and Ground terminals. This capacitor should be positioned as close as possible to the point where the power supply is connected to the array. Block Diagram |
Similar Part No. - AT27C800-10RC |
|
Similar Description - AT27C800-10RC |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |