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HD74LS243 Datasheet(PDF) 4 Page - Renesas Technology Corp |
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HD74LS243 Datasheet(HTML) 4 Page - Renesas Technology Corp |
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4 / 7 page  HD74LS243 Rev.3.00, Jul.15.2005, page 4 of 6 Testing Method Test Circuit VCC 4.5 V Input Output P.G. Zout = 50 Ω RL 1B GBA GAB 1A CL 5 kΩ S1 S3 S2 Notes: 1. 2A-2B, 3A-3B, 4A-4B are identical to abobe load circuit. 2. CL includes probe and jig capacitance. 3. S3 is a input-output switch. 4. All diodes are 1S2074(H). Waveforms 1 Input A (or B) Output B (or A) 3 V 0 V VOL VOH 1.3 V 1.3 V 1.3 V 1.3 V 10 % 10 % 90 % 90 % tPLH tPHH tTLH tTHL Note: Input pulse: tTLH ≤ 15 ns, t THL ≤ 6 ns, PRR = 1 MHz, duty cycle 50% |
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