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8 / 13 page Philips Semiconductors Product specification 74ALVT16821 2.5V/3.3V 20-bit bus-interface D-type flip-flop; positive-edge trigger (3-State) 1998 Feb 13 8 AC CHARACTERISTICS (2.5V "0.2V RANGE) GND = 0V; tR = tF = 2.5ns; CL = 50pF; RL = 500Ω; Tamb = –40°C to +85°C. LIMITS SYMBOL PARAMETER WAVEFORM Tamb = -40 to +85oC VCC = +2.5V ±0.2V UNIT MIN TYP MAX fMAX Maximum clock frequency 1 150 MHz tPLH tPHL Propagation delay nCP to nQx 1 1.0 1.0 2.6 2.7 4.0 4.4 ns tPZH tPZL Output enable time to High and Low level 3 4 1.5 1.0 2.8 1.8 4.6 3.0 ns tPHZ tPLZ Output disable time from High and Low level 3 4 1.5 1.0 2.7 2.1 4.1 3.3 ns NOTE: 1. All typical values are at VCC = 3.3V and Tamb = 25°C. AC SETUP REQUIREMENTS (2.5V "0.2V RANGE) GND = 0V, tR = tF = 2.5ns, CL = 50pF, RL = 500Ω LIMITS SYMBOL PARAMETER WAVEFORM Tamb = -40 to +85oC VCC = +2.5 ±0.2V UNIT MIN TYP ts(H) ts(L) Setup time, High or Low nDx to nCP 2 1.5 2.0 0.1 0.5 ns th(H) th(L) Hold time, High or Low nDx to nCP 2 0.3 0.5 –0.5 –0.1 ns tw(H) tw(L) nCP pulse width High or Low 1 1.5 1.5 ns AC WAVEFORMS VM = 1.5V at VCC w 3.0V; VM = VCC/2 at VCC v 2.7V VX = VOL + 0.3V at VCC w 3.0V; VX = VOL + 0.15V at VCC v 2.7V VY = VOH – 0.3V at VCC w 3.0V; VY = VOH – 0.15V at VCC v 2.7V VM SH00005 nCP nQx VM tw(H) tPHL VM tPLH 1/fMAX VM VM tw(L) 0V VOH VOL 3.0V or VCC whichever is less Waveform 1. Propagation Delay, Clock Input to Output, Clock Pulse Width, and Maximum Clock frequency th(H) ts(H) CP SH00006 VM VM VM VM VM VM th(L) ts(L) nDx 0V 0V 3.0V or VCC whichever is less 3.0V or VCC whichever is less Waveform 2. Data Setup and Hold Times |
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