INDUSTRIAL TEMPERATURE RANGE
4
IDT74FCT157AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
IDT74FCT151AT IDT74FCT151CT IDT74FCT151DT
Symbol Parameter Condition
(1)
Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Unit
t
PLH Propagation Delay CL = 50pF 1.5 5 1.5 4.3 1.5 3.9 ns
tPHL Ix to Zx RL = 500Ω
tPLH Propagation Delay 1.5 6 1.5 4.8 1.5 4.4 ns
tPHL E to Zx
tPLH Propagation Delay 1.5 7 1.5 5.2 1.5 4.6 ns
tPHL S to Zx
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Symbol Parameter Test Conditions
(1)
Min. Typ.
(2)
Max. Unit
ΔI
CC 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 — 0.15 0.25 mA/
Current
(4)
Outputs Open VIN = GND MHz
E = GND
One Input Toggling
50% Duty Cycle
I
C Total Power Supply Current
(6)
VCC = Max. VIN = VCC — 1.5 3.5 mA
Outputs Open VIN = GND
fo = 10MHz
50% Duty Cycle V
IN = 3.4V — 1.8 4.5
E = GND V
IN = GND
One Bit Toggling
V
CC = Max. VIN = VCC — 1.5 3.5
(5)
mA
Outputs Open VIN = GND
fo = 2.5MHz
50% Duty Cycle V
IN = 3.4V — 2.5 7.5
(5)
E = 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 (fONO)
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)
fO = Output Frequency
NO = Number of Outputs at fO
All currents are in milliamps and all frequencies are in megahertz.
POWER SUPPLY CHARACTERISTICS