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MCM6264CJ35 bảng dữ liệu(PDF) 3 Page - Motorola, Inc |
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MCM6264CJ35 bảng dữ liệu(HTML) 3 Page - Motorola, Inc |
3 / 8 page MCM6264C 3 MOTOROLA FAST SRAM AC OPERATING CONDITIONS AND CHARACTERISTICS (VCC = 5.0 V ± 10%, TA = 0 to + 70°C, Unless Otherwise Noted) Input Timing Measurement Reference Level 1.5 V . . . . . . . . . . . . . . . Input Pulse Levels 0 to 3.0 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input Rise/Fall Time 5 ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Timing Measurement Reference Level 1.5 V . . . . . . . . . . . . . Output Load See Figure 1A Unless Otherwise Noted . . . . . . . . . . . . READ CYCLE (See Notes 1 and 2) – 12 – 15 – 20 – 25 – 35 Parameter Symbol Min Max Min Max Min Max Min Max Min Max Unit Notes Read Cycle Time tAVAV 12 — 15 — 20 — 25 — 35 — ns 3 Address Access Time tAVQV — 12 — 15 — 20 — 25 — 35 ns Enable Access Time tELQV — 12 — 15 — 20 — 25 — 35 ns 4 Output Enable Access Time tGLQV — 6 — 8 — 10 — 11 — 12 ns Output Hold from Address Change tAXQX 4 — 4 — 4 — 4 — 4 — ns Enable Low to Output Active tELQX 4 — 4 — 4 — 4 — 4 — ns 5, 6 ,7 Enable High to Output High–Z tEHQZ 0 6 0 8 0 9 0 10 0 11 ns 5, 6, 7 Output Enable Low to Output Active tGLQX 0 — 0 — 0 — 0 — 0 — ns 5, 6, 7 Output Enable High to Output High–Z tGHQZ 0 6 0 7 0 8 0 9 0 10 ns 5, 6, 7 Power Up Time tELICCH 0 — 0 — 0 — 0 — 0 — ns Power Down Time tEHICCL — 12 — 15 — 20 — 25 — 35 ns NOTES: 1. W is high for read cycle. 2. E1 and E2 are represented by E in this data sheet. E2 is of opposite polarity to E. 3. All timings are referenced from the last valid address to the first transitioning address. 4. Addresses valid prior to or coincident with E going low. 5. At any given voltage and temperature, tEHQZ (max) is less than tELQX (min), and tGHQZ (max) is less than tGLQX (min), both for a given device and from device to device. 6. Transition is measured ± 500 mV from steady–state voltage with load of Figure 1B. 7. This parameter is sampled and not 100% tested. 8. Device is continuously selected (E1 = VIL, E2 = VIH, G = VIL). OUTPUT Z0 = 50 Ω 50 Ω VL = 1.5 V Figure 1A Figure 1B 5 pF + 5 V OUTPUT 255 Ω 480 Ω AC TEST LOADS The table of timing values shows either a minimum or a maximum limit for each pa- rameter. Input requirements are specified from the external system point of view. Thus, address setup time is shown as a minimum since the system must supply at least that much time (even though most devices do not require it). On the other hand, responses from the memory are specified from the device point of view. Thus, the access time is shown as a maxi- mum since the device never provides data later than that time. TIMING LIMITS |
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