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74FCT2244AT Datasheet(PDF) 4 Page - Integrated Device Technology |
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74FCT2244AT Datasheet(HTML) 4 Page - Integrated Device Technology |
4 / 6 page INDUSTRIALTEMPERATURERANGE 4 IDT74FCT2244AT/CT FASTCMOSOCTALBUFFER/LINEDRIVER NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 74FCT2244AT 74FCT2244CT Symbol Parameter Condition(1) Min.(2) Max. Min.(2) Max. Unit tPLH PropagationDelay CL = 50pF 1.5 4.8 1.5 4.1 ns tPHL Dx to Ox RL = 500 Ω tPZH OutputEnableTime 1.5 6.2 1.5 5.8 ns tPZL tPHZ OutputDisableTime 1.5 5.6 1.5 5.2 ns tPLZ SWITCHING CHARACTERISTICS OVER OPERATING RANGE Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit ΔICC Quiescent Power Supply Current VCC = Max. — 0.5 2 mA TTL Inputs HIGH VIN = 3.4V(3) ICCD Dynamic Power Supply VCC = Max. VIN = VCC — 0.06 0.12 mA/ Current(4) Outputs Open VIN = GND MHz OEA or OEB = GND One Input Toggling 50% Duty Cycle IC Total Power Supply Current(6) VCC = Max. VIN = VCC — 0.6 2.2 mA Outputs Open VIN = GND fi = 10MHz 50% Duty Cycle VIN = 3.4V — 0.9 3.2 OEA or OEB = GND VIN = GND One Bit Toggling VCC = Max. VIN = VCC — 1.2 3.4(5) Outputs Open VIN = GND fi = 2.5MHz 50% Duty Cycle VIN = 3.4V — 3.2 11.4(5) OEA or OEB = GND VIN = GND Four Bits Toggling NOTES: 1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25°C ambient. 3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of ΔICC formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ΔICC DHNT + ICCD (fCP/2+ fiNi) ICC = Quiescent Current ΔICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) fi = Output Frequency Ni = Number of Outputs at fi All currents are in milliamps and all frequencies are in megahertz. POWER SUPPLY CHARACTERISTICS |
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