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IDT74FCT645CD Datasheet(PDF) 4 Page - Integrated Device Technology |
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IDT74FCT645CD Datasheet(HTML) 4 Page - Integrated Device Technology |
4 / 7 page 7.9 4 IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS MILITARY AND COMMERCIAL TEMPERATURE RANGES POWER SUPPLY CHARACTERISTICS VLC = 0.2V; VHC = VCC – 0.2V Symbol Parameter Test Conditions (1) Min. Typ. (2) Max. Unit ICC Quiescent Power Supply Current Vcc = Max. — 0.5 1.5 mA VIN ≥ VHC; VIN ≤ VLC ∆ICC Quiescent Power Supply Current Vcc = Max. — 0.5 2.0 mA TTL Inputs HIGH VIN = 3.4V (3) ICCD Dynamic Power Supply Current (4) Vcc = Max. VIN ≥ VHC — 0.15 0.25 mA/MHz Outputs Open VIN ≤ VLC OE = GND T/ R = GND or VCC One Input Toggling 50% Duty Cycle IC Total Power Supply Current (6) Vcc = Max. VIN ≥ VHC — 2.0 4.0 mA Outputs Open VIN ≤ VLC fi = 10MHz (FCT) 50% Duty Cycle VIN = 3.4V — 2.3 5.0 T/ R = OE = GND VIN = GND One Bit Toggling Vcc = Max. VIN ≥ VHC — 3.5 6.5 (5) Outputs Open VIN ≤ VLC fi = 2.5MHz (FCT) 50% Duty Cycle VIN = 3.4V — 5.5 14.5 (5) T/ R = OE = GND VIN = GND Eight Bits Toggling NOTES: 2534 tbl 04 1. For conditions shown as Max. or Min., 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 the ICC formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi) ICC = Quiescent Current ∆ICC = 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 Output Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) fi = Input Frequency Ni = Number of Inputs at fi All currents are in milliamps and all frequencies are in megahertz. |
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