74LVC4245APW datasheet(8/17 Pages) NXP

Part #	74LVC4245APW

Description	Octal dual supply translating transceiver; 3-state

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Manufacturer	NXP [NXP Semiconductors]

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74LVC4245A_6

Product data sheet

Rev. 06 — 18 January 2008

8 of 17

NXP Semiconductors

74LVC4245A

Octal dual supply translating transceiver; 3-state

[1]

Typical values are measured at Tamb =25 °C, VCCA = 5.0 V, and VCCB = 2.7 V and 3.3 V respectively.

[2]

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

[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. AC waveforms

tsk(o)

output skew

time

[2]

-

1.0

-

1.5

ns

CPD

power

dissipation

capacitance

5 V port: Bn to An;

VI = GND to VCCA;

VCCA = 5.0 V

[3]

outputs enabled

-

17

-

pF

outputs disabled

-

5

-

pF

3 V port: An to Bn;

VI = GND to VCCB;

VCCB = 3.3 V

[3]

outputs enabled

-

17

-

pF

outputs disabled

-

5

-

pF

Table 7.

Dynamic characteristics …continued

Voltages are referenced to GND (ground = 0 V). VCCA = 4.5 V to 5.5 V; tr = tf ≤ 2.5 ns. For test circuit see Figure 8.

Symbol Parameter

Conditions

VCCB

−40 °C to +85 °C

−40 °C to +125 °C Unit

Min

Typ[1]

Max

Min

Max

Fig 5.

Supply operation area

1.5

2.7

5.7

Complies with TTL levels

3.9

0.9

mna454

3.9

2.1

4.5

5.1

3.3

1.5

2.1

2.7

3.3

3.6

1.2

1.8

2.4

3.0

VCCA (V)

VCCB

(V)

VCCA ≥ VCCB

Full operation

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