INDUSTRIAL TEMPERATURE RANGE
4
IDT74FCT377AT/CT/DT
FAST CMOS OCTAL D FLIP-FLOP WITH CLOCK ENABLE
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
Symbol Parameter Test Conditions
(1)
Min. Typ.
(2)
Max. Unit
ΔICC Quiescent Power Supply VCC = Max. — 0.5 2 mA
Current TTL Inputs HIGH V
IN = 3.4V
(3)
ICCD Dynamic Power Supply VCC = Max., Outputs Open VIN = VCC — 0.15 0.25 mA/
Current
(4)
CE = GND VIN = GND MHz
One Input Toggling
50% Duty Cycle
I
C Total Power Supply VCC = Max., Outputs Open VIN = VCC — 1.5 3.5 mA
Current
(6)
fCP = 10MHz VIN = GND
CE = GND VIN = 3.4V — 2 5.5
One Bit Toggling VIN = GND
f
i = 5MHz
50% Duty Cycle
V
CC = Max., Outputs Open VIN = VCC — 3.8 7.3
(5)
fCP = 10MHz, 50% Duty Cycle VIN = GND
CE = GND V
IN = 3.4V — 6 16.3
(5)
Eight Bits Toggling VIN = GND
fi = 2.5MHz
50% Duty Cycle
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
74FCT377AT 74FCT377CT 74FCT377DT
Symbol Parameter Condition
(1)
Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Unit
t
PLH Propagation Delay CL = 50pF 2 7.2 2 5.2 2 4.4 ns
tPHL CP to Qx RL = 500Ω
tSU Set-up Time HIGH or LOW 2 — 2 — 2 — ns
Dx to CP
tH Hold Time HIGH or LOW 1.5 — 1.5 — 1 — ns
Dx to CP
t
SU Set-up Time HIGH or LOW 3.5 — 3.5 — 3 — ns
CE to CP
tH Hold Time HIGH or LOW 1.5 — 1.5 — 0 — ns
CE to CP
tW CP Pulse Width HIGH or LOW 8 — 6 — 3 — ns
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
