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74LVC646AD Datasheet(PDF) 8 Page - NXP Semiconductors |
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74LVC646AD Datasheet(HTML) 8 Page - NXP Semiconductors |
8 / 16 page Philips Semiconductors Product specification 74LVC646A Octal bus transceiver/register (3-State) 1998 Jul 29 8 AC CHARACTERISTICS GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF LIMITS SYMBOL PARAMETER WAVEFORM VCC = 3.3V ±0.3V VCC = 2.7V VCC = 1.2V UNIT MIN TYP1 MAX MIN MAX TYP tPHL/tPLH Propagation delay An, Bn to Bn, An Figures 1, 6 1.5 3.9 6.8 1.5 7.8 15 ns tPHL/tPLH Propagation delay CPAB, CPBA to Bn, An Figures 2, 6 1.5 4.6 7.6 1.5 8.6 19 ns tPHL/tPLH Propagation delay SAB, SBA to Bn, An Figures 3, 6 1.5 4.9 8.5 1.5 9.5 19 ns tPZH/tPZL 3-State output enable time OEn to An, Bn Figures 4, 6 1.5 4.5 7.8 1.5 8.8 20 ns tPHZ/tPLZ 3-State output disable time OEn to An, Bn Figures 4, 6 1.5 3.9 6.1 1.5 7.1 10 ns tPZH/tPZL 3-State output enable time DIR to An, Bn Figures 5, 6 1.5 4.6 7.9 1.5 8.9 20 ns tPHZ/tPLZ 3-State output disable time DIR to An, Bn Figures 5, 6 1.5 3.5 6.0 1.5 7.0 12 ns tW Clock pulse width HIGH or LOW CPAB or CPBA Figure 1, 3 3.3 1.9 – 3.3 – – ns tsu Set-up time An, Bn to CPAB, CPBA Figure 2 1.6 0.35 – 1.6 – – ns th Hold time An, Bn to CPAB, CPBA Figure 2 1.0 –0.3 – 1.0 – – ns fmax Maximum clock pulse frequency Figure 2 150 250 – 125 – – ns NOTE: 1. These typical values are at VCC = 3.3V and Tamb = 25°C. |
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