74LVCH16245ADGG datasheet(10/19 Pages) PHILIPS

Il numero della parte	74LVCH16245ADGG

Spiegazioni elettronici	16-bit bus transceiver with direction pin; 5V tolerant 3-State

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74LVC_LVCH16245A_8

Product data sheet

Rev. 08 — 6 November 2008

10 of 19

NXP Semiconductors

74LVC16245A; 74LVCH16245A

16-bit bus transceiver with direction pin; 5 V tolerant; 3-state

[1]

tpd is the same as tPLH and tPHL.

ten is the same as tPZL and tPZH.

tdis is the same as tPLZ and tPHZ.

[2]

Typical values are measured at Tamb =25 °C and VCC = 3.3 V.

[3]

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

PD =CPD × VCC2 × fi × N+ Σ(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

Σ(C

L × VCC

2

× f

o) = sum of the outputs.

11. Waveforms

CPD

power

dissipation

capacitance

per buffer; VI = GND to VCC

[3]

VCC = 3.3 V

-

30

-

pF

Table 7.

Dynamic characteristics …continued

Voltages are referenced to GND (ground = 0 V). For test circuit see Figure 9.

Symbol Parameter

Conditions

−40 °C to +85 °C

−40 °C to +125 °C Unit

Min

Typ

Max

Min

Max

Measurement points are given in Table 8.

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

Fig 7.

The input (nAn, nBn) to output (nBn, nAn) propagation delays

mna477

nAn, nBn

input

nBn, nAn

output

tPHL

tPLH

GND

VI

VM

VOH

VOL

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