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25LC640A Datasheet(PDF) 3 Page - Microchip Technology |
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25LC640A Datasheet(HTML) 3 Page - Microchip Technology |
3 / 24 page © 2009 Microchip Technology Inc. DS22144A-page 3 25LC640A TABLE 1-2: AC CHARACTERISTICS AC CHARACTERISTICS Extended (M): TA = -55°C to 125°C VCC = 2.5V to 5.5V Param. No. Sym. Characteristic Min. Max. Units Test Conditions 1FCLK Clock frequency — — 10 5 MHz MHz 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 2TCSS CS setup time 50 100 — — ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 3TCSH CS hold time 100 200 — — ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 4TCSD CS disable time 50 — ns — 5 Tsu Data setup time 10 20 — — ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 6THD Data hold time 20 40 — — ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 7TR CLK rise time — 100 ns (Note 1) 8TF CLK fall time — 100 ns (Note 1) 9THI Clock high time 50 100 — — ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 10 TLO Clock low time 50 100 — — ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 11 TCLD Clock delay time 50 — ns — 12 TCLE Clock enable time 50 — ns — 13 TV Output valid from clock low — — 50 100 ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 14 THO Output hold time 0 — ns (Note 1) 15 TDIS Output disable time — — 40 80 ns ns 4.5V ≤ Vcc ≤ 5.5V(Note 1) 2.5V ≤ Vcc ≤ 4.5V(Note 1) 16 THS HOLD setup time 20 40 — — ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 17 THH HOLD hold time 20 40 — — ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 18 THZ HOLD low to output High-Z 30 60 — — ns ns 4.5V ≤ Vcc ≤ 5.5V(Note 1) 2.5V ≤ Vcc < 4.5V(Note 1) 19 THV HOLD high to output valid 30 60 — — ns ns 4.5V ≤ Vcc ≤ 5.5V 2.5V ≤ Vcc < 4.5V 20 TWC Internal write cycle time — 5 ms (NOTE 3) 21 — Endurance 1M — E/W Cycles (NOTE 2) Note 1: This parameter is periodically sampled and not 100% tested. 2: This parameter is not tested but ensured by characterization. For endurance estimates in a specific application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site at www.microchip.com. 3: TWC begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle is complete. |
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