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AM49DL640BG70IS 데이터시트(PDF) 41 Page - Advanced Micro Devices |
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AM49DL640BG70IS 데이터시트(HTML) 41 Page - Advanced Micro Devices |
41 / 62 page 40 Am49DL640BG March 8, 2002 PR E L I M I N A R Y FLASH AC CHARACTERISTICS Read-Only Operations Notes: 1. Not 100% tested. 2. See Figure 11 and Table 14 for test specifications 3. Measurements performed by placing a 50 Ω termination on the data pin with a bias of V CC/2. The time from OE# high to the data bus driven to VCC/2 is taken as tDF . Parameter Description Test Setup Speed JEDEC Std. 70 85 Unit t AVAV t RC Read Cycle Time (Note 1) Min 70 85 ns t AVQV t ACC Address to Output Delay CE#f, OE# = V IL Max 70 85 ns t ELQV t CE Chip Enable to Output Delay OE# = V IL Max 70 85 ns t GLQV t OE Output Enable to Output Delay Max 30 40 ns t EHQZ t DF Chip Enable to Output High Z (Notes 1, 3) Max 30 35 ns tGHQZ tDF Output Enable to Output High Z (Notes 1, 3) Max 30 ns tAXQX tOH Output Hold Time From Addresses, CE#f or OE#, Whichever Occurs First Min 0 ns t OEH Output Enable Hold Time (Note 1) Read Min 0 ns Toggle and Data# Polling Min 10 ns tOH tCE Outputs WE# Addresses CE#f OE# HIGH Z Output Valid HIGH Z Addresses Stable tRC tACC tOEH tRH tOE tRH 0 V RY/BY# RESET# tDF Figure 14. Read Operation Timings |
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