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MCM6709RJ7 Datasheet(PDF) 3 Page - Motorola, Inc |
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MCM6709RJ7 Datasheet(HTML) 3 Page - Motorola, Inc |
3 / 8 page MCM6709R 3 MOTOROLA FAST SRAM CAPACITANCE (f = 1.0 MHz, dV = 3.0 V, TA = 25°C, Periodically Sampled Rather Than 100% Tested) Parameter Symbol Max Unit Address Input Capacitance Cin 5 pF Control Pin Input Capacitance (E, G, W) Cin 6 pF Input/Output Capacitance CI/O 6 pF 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 2 ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output Timing Measurement Reference Level 1.5 V . . . . . . . . . . . . . Output Load See Figure 1A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . READ CYCLES 1 AND 2 (See Notes 1 and 2) MCM6709R–6 MCM6709R–7 MCM6709R–8 Parameter Symbol Min Max Min Max Min Max Unit Notes Read Cycle Time tAVAV 6 — 7 — 8 — ns 3 Address Access Time tAVQV — 6 — 7 — 8 ns Chip Enable Access Time tELQV — 6 — 7 — 8 ns Output Enable Access Time tGLQV — 4 — 4 — 4 ns Output Hold from Address Change tAXQX 3 — 3 — 3 — ns Chip Enable Low to Output Active tELQX 3 — 3 — 3 — ns 4, 5, 6 Output Enable Low to Output Active tGLQX 0 — 0 — 0 — ns 4, 5, 6 Chip Enable High to Output High–Z tEHQZ 0 3 0 3.5 0 4 ns 4, 5, 6 Output Enable High to Output High–Z tGHQZ 0 3 0 3.5 0 4 ns 4, 5, 6 NOTES: 1. W is high for read cycle. 2. Product sensitivities to noise require proper grounding and decoupling of power supplies as well as minimization or elimination of bus contention conditions during read and write cycles. 3. All read cycle timings are referenced from the last valid address to the first transitioning address. 4. 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. 5. Transition is measured 200 mV from steady–state voltage with load of Figure 1B. 6. This parameter is sampled and not 100% tested. AC TEST LOADS OUTPUT Z0 = 50 Ω RL = 50 Ω VL = 1.5 V Figure 1A Figure 1B 5 pF +5 V OUTPUT 255 Ω 480 Ω The table of timing values shows either a minimum or a maximum limit for each param- eter. Input requirements are specified from the external system point of view. Thus, ad- dress 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 maximum since the device never pro- vides data later than that time. TIMING LIMITS |
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