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
74VHCT14A
HEX SCHMITT INVERTER
1/11September 2004 HIGH SPEED: tPD = 5.5 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION:
ICC = 2 μA (MAX.) at TA=25°C TYPICAL HYSTERESIS: 0.7V at VCC = 4.5V POWER DOWN PROTECTION ON INPUTS
& OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = 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 14 IMPROVED LATCH-UP IMMUNITY LOW NOISE: V OLP = 0.8V (MAX.)
DESCRIPTIONThe 74VHCT14A is an advanced high-speed
CMOS HEX SCHMITT INVERTER fabricated with
sub-micron silicon gate and double-layer metal
wiring C2 MOS technology.
The internal circuit is composed of 3 stages
including buffer output, which provides high noise
immunity and stable output.
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.
Pin configuration and function are the same as
those of the 74VHC04 but the 74VHC14 has
hysteresis.
This together with its schmitt trigger function
allows it to be used on line receivers with slow
rise/fall input signals.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74VHCT14AHEX SCHMITT INVERTER
Figure 1: Pin Connection And IEC Logic Symbols
Table 1: Order Codes Rev. 1
74VHCT14A2/11
Figure 2: Input Equivalent Circuit Table 2: Pin Description
Table 3: Truth Table
Table 4: 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
Table 5: Recommended Operating Conditions 1) VCC = 0V
2) High or Low State
74VHCT14A3/11
Table 6: DC Specifications
Table 7: AC Electrical Characteristics (Input tr = tf = 3ns)
(*) Voltage range is 5.0V ± 0.5V
Table 8: 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/6 (per gate)
74VHCT14A4/11
Table 9: Dynamic Switching Characteristics 1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.0V, (n-1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.0V. Inputs under test switching: 3.0V to threshold (VILD), 0V to threshold
(VIHD), f=1MHz.
Figure 3: Test Circuit CL =15/50pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50Ω)
74VHCT14A5/11
Figure 4: Waveform - Propagation Delays (f=1MHz; 50% duty cycle)
