74LVC14A datasheet(6/18 Pages) NXP

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74LVC14A

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Product data sheet

Rev. 5 — 23 December 2011

6 of 18

NXP Semiconductors

74LVC14A

Hex inverting Schmitt trigger with 5 V tolerant input

[1]

Typical values are measured at Tamb =25 C and VCC = 1.2 V, 1.8 V, 2.5 V, 2.7 V, and 3.3 V respectively.

[2]

tpd is the same as tPLH and tPHL.

[3]

Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.

[4]

CPD is used to determine the dynamic power dissipation (PD in W).

PD =CPD  VCC2  fi  N+ (CL  VCC2  fo) where:

fi = input frequency in MHz; fo = output frequency in MHz

CL = output load capacitance in pF

VCC = supply voltage in Volts

N = number of inputs switching

(C

L  VCC

 f

o) = sum of the outputs.

12. Waveforms

CPD

power dissipation

capacitance

per buffer; VI =GND to VCC

[4]

VCC = 1.65 V to 1.95 V

9.0

VCC = 2.3 V to 2.7 V

12.5

VCC = 3.0 V to 3.6 V

15.6

Table 7.

Dynamic characteristics …continued

Voltages are referenced to GND (ground = 0 V). For test circuit see Figure 7.

Symbol Parameter

Conditions

40 C to +85 C

40 C to +125 C Unit

Min

Typ[1]

Max

Min

Max

VM = 1.5 V at VCC  2.7 V

VM =0.5  VCC at VCC <2.7 V.

VOL and VOH are typical output voltage levels that occur with the output load.

Fig 6.

Propagation delay input (nA) to output (nY)

mna344

tPHL

tPLH

nA input

nY output

GND

VOH

VOL

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