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74LV245 Datasheet(PDF) 6 Page - NXP Semiconductors |
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74LV245 Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 12 page Philips Semiconductors Product specification 74LV245 Octal bus transceiver (3-State) 1998 Apr 20 6 AC CHARACTERISTICS GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF; RL = 1KΩ CONDITION LIMITS SYMBOL PARAMETER WAVEFORM CONDITION –40 to +85 °C –40 to +125 °C UNIT VCC(V) MIN TYP1 MAX MIN MAX 1.2 45 28 Propagation delay 2.0 15 28 34 tPHL/tPLH Pro agation delay An to Bn; B tA Figures 1 2.7 11 19 24 ns Bn to An 3.0 to 3.6 92 16 20 4.5 to 5.5 83 11 14 1.2 55 3-State output enable time 2.0 19 31 39 tPZH/tPZL 3-State out ut enable time OE to An; OE tB Figures 2 2.7 14 23 29 ns OE to Bn 3.0 to 3.6 102 18 23 4.5 to 5.5 8.53 14 18 1.2 65 3-State output disable time OE tA 2.0 24 32 39 tPHZ/tPLZ OE to An; OE to Bn Figures 2 2.7 18 24 29 ns OE to Bn 3.0 to 3.6 142 20 24 4.5 to 5.5 11.53 16 19 NOTES: 1. Unless otherwise stated, all typical values are measured at Tamb = 25°C 2. Typical values are measured at VCC = 3.3 V. 3. Typical values are measured at VCC = 5.0 V. AC WAVEFORMS VM = 1.5 V at VCC ≥ 2.7 V and ≤ 3.6 V VM = 0.5 V × VCC at VCC < 2.7 V and ≥ 4.5 V VOL and VOH are the typical output voltage drop that occur with the output load. VX = VOL + 0.3 V at VCC ≥ 2.7 V and ≤ 3.6 V VX = VOL + 0.1 × VCC at VCC < 2.7 V and ≥ 4.5 V VY = VOH – 0.3 V at VCC ≥ 2.7V and ≤ 3.6 V VY = VOH – 0.1 × VCC at VCC < 2.7 V and ≥ 4.5 V SV00627 VM An, Bn INPUT Bn, An OUTPUT VM tPLH tPHL Figure 1. Input (An, Bn) to output (Bn, An) propagation delays and the output transition times. SV00628 outputs disabled outputs enabled outputs enabled tPHZ tPZH tPZL tPLZ VM VM VM OE INPUT HIGH-to-OFF OFF-to-HIGH LOW-to-OFF OFF-to-LOW VX VY GND VCC OUTPUT VI VOL VOH OUTPUT GND Figure 2. 3-State enable and disable times. |
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