74VHCT139AM ,DUAL 2 TO 4 DECODER/DEMULTIPLEXERAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
74VHCT14 ,Hex Schmitt InverterFeaturesThe VHCT14A is an advanced high speed CMOS Hex High speed: t = 5.0 ns (typ) at T = 25°CPD ..
74VHCT14A ,HEX SCHMITT INVERTERAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
74VHCT14AM ,Hex Schmitt InverterFeaturesThe VHCT14A is an advanced high speed CMOS Hex
74VHCT139AM
DUAL 2 TO 4 DECODER/DEMULTIPLEXER
1/9June 2001 HIGH SPEED: tPD = 5 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION:CC = 2 μA (MAX.) at TA =25°C COMPATIBLE WITH TTL OUTPUTS:
VIH = 2V (MIN.), VIL = 0.8V (MAX) POWER DOWN PROTECTION ON INPUTS
& OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:OH | = IOL = 8 mA (MIN) BALANCED PROPAGATION DELAYS: PLH ≅ t PHL OPERATING VOLTAGE RANGE:
VCC(OPR) = 4.5V to 5.5V PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 139 IMPROVED LATCH-UP IMMUNITY
DESCRIPTIONThe 74VHCT139A is an advanced high-speed
CMOS DUAL 2 TO 4 LINE DECODER/
DEMULTIPLEXER fabricated with sub-micron
silicon gate and double-layer metal wiring C2 MOS
technology.
The active low enable input can be used for gating
or as a data input for demultiplexing applications.
When the enable input is held high, all four outputs
are high independently of the other inputs.
Power down protection is provided on all inputs
and outputs and 0 to 7V can be accepted on
inputs with no regard to the supply voltage. This
device can be used to interface 5V to 3V since all
inputs are equipped with TTL threshold.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74VHCT139ADUAL 2 TO 4 DECODER/DEMULTIPLEXER
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
74VHCT139A2/9
INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE X : Don’t Care
LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays
74VHCT139A3/9
ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
1) VCC = 0V
2) High or Low State
RECOMMENDED OPERATING CONDITIONS 1) VCC = 0V
2) High or Low State
3) VIN from 0.8V to 2V
74VHCT139A4/9
DC SPECIFICATIONS
AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3ns)
(*) Voltage range is 5.0V ± 0.5V
CAPACITIVE CHARACTERISTICS 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/2 (per
decoder)
74VHCT139A5/9
TEST CIRCUIT CL =15/50pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM 1 : PROPAGATION DELAYS FOR INVERTING OUTPUTS (f=1MHz; 50% duty cycle)
74VHCT139A6/9
WAVEFORM 2: PROPAGATION DELAYS FOR NON-INVERTING OUTPUTS (f=1MHz; 50% duty cycle)
