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74LVC161DB 数据表(PDF) 9 Page - NXP Semiconductors |
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74LVC161DB 数据表(HTML) 9 Page - NXP Semiconductors |
9 / 14 page Philips Semiconductors Product specification 74LVC161 Presettable synchronous 4-bit binary counter; asynchronous reset 1998 May 20 9 AC WAVEFORMS VM = 1.5 V at VCC w 2.7 V VM = 0.5 S VCC at VCC < 2.7 V VOL and VOH are the typical output voltage drop that occur with the output load. VM VM 1/fMAX tw tPLH tPHL CP INPUT Qn, TC OUTPUT SY00071 GND VI VOH VOL Waveform 1. Clock (CP) to outputs (Qn, TC) propagation delays, the clock pulse width and the maximum clock frequency. VM tPLH tPHL CET INPUT TC OUTPUT VM VI GND VOH VOL SY00072 Waveform 2. Input (CET) to output (TC) propagation delays. VM VM tw trem tPHL MR INPUT Qn, TC OUTPUT GND VI VOH VOL SY00073 CP INPUT GND VI Waveform 3. Master reset (MR) pulse width, the master reset to output (Qn, TC) propagation delays and the master reset to clock (CP) removal times. The shaded areas indicate when the input is permitted to change for predictable output performance. th th VM VM VM VI VI VI GND GND GND PE INPUT CP INPUT Dn INPUT tSU tSU th tSU th tSU SC00137 Waveform 4. Setup and hold times for the input (Dn) and parallel enable input (PE). NOTE: The shaded areas indicate when the input is permitted to change for predictable output performance. VM VM VM tsu th tsu th SC00138 VI VI GND GND CEP, CET INPUT CP INPUT Waveform 5. CEP and CET setup and hold times. TEST CIRCUIT SWITCH POSITION PULSE GENERATOR RT VI D.U.T. VO CL VCC 500 Ω Open GND S1 VCC VI < 2.7V VCC TEST S1 tPLH/tPHL Open 2.7V 2.7–3.6V 50pF 500 Ω 2 * VCC SV00903 Waveform 6. Load circuitry for switching times. |
类似零件编号 - 74LVC161DB |
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类似说明 - 74LVC161DB |
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