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SN74FB2041ARC 데이터시트(PDF) 7 Page - Texas Instruments |
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SN74FB2041ARC 데이터시트(HTML) 7 Page - Texas Instruments |
7 / 10 page SN74FB2041A 7-BIT TTL/BTL TRANSCEIVER SCBS172M – NOVEMBER 1991 – REVISED MARCH 2002 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION From Output Under Test CL = 50 pF (see Note A) LOAD CIRCUIT FOR A OUTPUTS S1 500 Ω 500 Ω From Output Under Test LOAD CIRCUIT FOR B OUTPUTS 2.1 V 16.5 Ω CL = 30 pF (see Note A) Test Point tPHL tPLH Output 3 V 0 V VOH VOL tPHL tPLH 2 V 1 V VOH VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (B TO A) VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (A TO B) Output Control Output Waveform 1 S1 at 7 V (see Note B) Output Waveform 2 S1 at Open (see Note B) VOL VOH tPLZ tPZH tPZL tPHZ 3.5 V 0 V VOL + 0.3 V VOH – 0.3 V ≈0 V 3 V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES (A PORT) tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 7 V Open TEST S1 NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: TTL inputs: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns; BTL inputs: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. D. The outputs are measured one at a time with one transition per measurement. 7 V Open Input 1.5 V 1.5 V 1.55 V 1.55 V Output Input 1.5 V 1.5 V 1.55 V 1.55 V 1.5 V 1.5 V 1.5 V 1.5 V Figure 1. Load Circuits and Voltage Waveforms |
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