74ALVC_ALVCH16245_15 datasheet(10/17 Pages) PHILIPS

No de pièce	74ALVC_ALVCH16245

Description	16-bit transceiver with direction pin; 3-state

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Fabricant	PHILIPS [NXP Semiconductors]

Site Internet	http://www.nxp.com

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10 / 17 page

9397 750 13117

Product data sheet

Rev. 03 — 12 May 2004

10 of 17

Philips Semiconductors

74ALVC16245; 74ALVCH16245

16-bit bus transceiver with direction pin; 3-state

11. Dynamic characteristics

[1]

All typical values are measured at Tamb =25 °C.

[2]

Typical values are measured at VCC = 2.5 V.

[3]

Typical values are measured at VCC = 3.3 V.

[4]

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

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 = total load switching outputs;

∑ (C

L × VCC

2

× f

o) = sum of outputs.

[5]

The condition is VI = GND to VCC.

Table 8:

Dynamic characteristics

At recommended operating conditions; voltages are referenced to GND (ground = 0 V); test circuit Figure 8.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Tamb = −40 °C to +85 °C [1]

tPHL, tPLH

propagation delay nAn to nBn;

nBn to nAn

see Figure 6

VCC = 2.3 V to 2.7 V

[2] 1.0

2.0

3.7

ns

VCC = 3.0 V to 3.6 V

[3] 1.0

1.9

3.0

ns

VCC = 2.7 V

1.0

2.1

3.6

ns

tPZH, tPZL

3-state output enable time nOE to

nAn; nOE to nBn

see Figure 7

VCC = 2.3 V to 2.7 V

[2] 1.0

2.7

5.7

ns

VCC = 3.0 V to 3.6 V

[3] 1.0

2.3

4.4

ns

VCC = 2.7 V

1.0

3.0

5.4

ns

tPHZ, tPLZ

3-state output disable time nOE to

nAn; nOE to nBn

see Figure 7

VCC = 2.3 V to 2.7 V

[2] 1.0

2.2

5.2

ns

VCC = 3.0 V to 3.6 V

[3] 1.0

2.8

4.1

ns

VCC = 2.7 V

1.0

3.1

4.6

ns

CPD

power dissipation capacitance per

buffer

outputs enabled

[4] [5] -29

-

pF

outputs disabled

[4] [5] -5

-pF

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