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6 page 
ACE24C128/256 Technology Two-wire Serial EEPROM VER 1.2 6 AC Characteristics Applicable over recommended operating range from: TA = -40℃ to +85℃, VCC = +1.7V to +5.5V, CL = 1 TTL Gate and 100 pF (unless otherwise noted). Test conditions are listed in Note2. 1.7-volt 2.5-volt 5.5-volt Symbol Parameter Min Max Min Max Min Max Units fSCL Clock Frequency, SCL 400 1000 1000 kHz TLOW Clock Pulse Width Low 1.3 0.40 0.4 µs THIGH Clock Pulse Width High 0.6 0.40 0.4 µs Ti 1 Noise Suppression Time 100 50 50 TAA Clock Low to Data Out Valid 0.1 0.9 0.05 0.55 0.05 0.55 µs TBUF 1 Time the bus must be free before a new transmission can Start 1.3 0.5 0.5 µs THD.STA Start Hold Time 0.6 0.25 0.25 µs TSU.STA Start Setup Time 0.6 0.25 0.25 µs THD.DAT Data In Hold Time 0 0 0 µs TSU.DAT Data In Setup Time 100 100 100 ns TR Inputs Rise Time 0.3 0.3 0.3 µs TF Inputs Fall Time 300 100 100 ns TSU.STO Stop Setup Time 0.6 0.25 0.25 µs TDH Data Out Hold Time 50 50 50 ns TWR Write Cycle Time 5 5 5 ms Endurance 1 5.0V, 25℃, Page Mode 1,000,000 Write Cycles Notes:1. This parameter is characterized and not 100% tested. 2.AC measurement conditions: RL (connects to Vcc): 1.3kΩ Input pulse voltages: 0.3 Vcc to 0.7 Vcc Input rise and fall times: ≦50 ns Input and output timing reference voltages: 0.5Vcc |
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