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AT27LV020A-90VC Datasheet(PDF) 8 Page - ATMEL Corporation |
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AT27LV020A-90VC Datasheet(HTML) 8 Page - ATMEL Corporation |
8 / 9 page AT27LV020A 8 AC Programming Characteristics TA = 25 ± 5°C, VCC = 6.5 ± 0.25V, VPP = 13.0 ± 0.25V *AC Conditions of Test: Input Rise and Fall Times (10% to 90%).............20 ns Input Pulse Levels..................................0.45V to 2.4V Input Timing Reference Level..................0.8V to 2.0V Output Timing Reference Level...............0.8V to 2.0V Notes: 1. VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP. 2. This parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven —see timing diagram. 3. Program Pulse width tolerance is 100 µsec ± 5%. Atmel's 27LV020A Integrated Product Identification Code (1) Note: 1. The AT27LV020A has the same Product Identification Code as the AT27C020. Both are programming com- patible. Rapid Programming Algorithm A 100 µs PGM pulse width is used to program. The address is set to the first location. VCC is raised to 6.5V and VPP is raised to 13.0V. Each address is first programmed with one 100 µs PGM pulse without verification. Then a verification/reprogramming loop is executed for each address. In the event a byte fails to pass verification, up to 10 successive 100 µs pulses are applied with a verification after each pulse. If the byte fails to verify after 10 pulses have been applied, the part is considered failed. After the byte verifies properly, the next address is selected until all have been checked. VPP is then lowered to 5.0V and VCC to 5.0V. All bytes are read again and compared with the original data to determine if the device passes or fails. Symbol Parameter Test Conditions* (1) Limits Units Min Max tAS Address Setup Time 2 µs tCES CE Setup Time 2 µs tOES OE Setup Time 2 µs tDS Data Setup Time 2 µs tAH Address Hold Time 0 µs tDH Data Hold Time 2 µs tDFP OE High to Output Float Delay 0 130 ns tVPS VPP Setup Time 2 µs tVCS VCC Setup Time 2 µs tPW PGM Program Pulse Width 95 105 µs tOE Data Valid from OE 150 ns tPRT VPP Pulse Rise Time During Programming 50 ns Codes Pins Hex Data A0 O7 O6 O5 O4 O3 O2 O1 O0 Manufacturer 0 0 001111 0 1E Device Type 1 1 000011 0 86 |
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