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SM320C50GFAM66 bảng dữ liệu(PDF) 11 Page - Texas Instruments |
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SM320C50GFAM66 bảng dữ liệu(HTML) 11 Page - Texas Instruments |
11 / 37 page SMJ320C50/SMQ320C50 DIGITAL SIGNAL PROCESSOR SGUS020B -- JUNE 1996 -- REVISED SEPTEMBER 2001 11 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251--1443 PARAMETER MEASUREMENT INFORMATION Tester Pin Electronics VLOAD IOL CT IOH Output Under Test 50 Ω Where: IOL = 2.0 mA (all outputs) IOH = 300 μA (all outputs) VLOAD =1.5 V CT = 80 pF typical load circuit capacitance Figure 1. Test Load Circuit signal transition levels Transistor-to-transistor logic (TTL) output levels are driven to a minimum logic-high level of 2.4 V and to a maximum logic-low level of 0.6 V. Figure 2 shows the TTL-level outputs. 0.6 V 1V 2V 2.4 V Figure 2. TTL-Level Outputs TTL-output transition times are specified as follows: D For a high-to-low transition, the level at which the output is said to be no longer high is 2 V, and the level at which the output is said to be low is 1 V. D For a low-to-high transition, the level at which the output is said to be no longer low is 1 V, and the level at which the output is said to be high is 2 V. Figure 3 shows the TTL-level inputs. 2.2 V 0.6 V Figure 3. TTL-Level Inputs TTL-compatible input transition times are specified as follows: D For a high-to-low transition on an input signal, the level at which the input is said to be no longer high is 2 V, and the level at which the input is said to be low is 0.8 V. D For a low to high transisiton on an input signal, the level at which the input is said to be no longer low is 0.8 V, and the level at which the input is said to be high is 2 V. |
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