74LVCH322245A_15 datasheet(8/15 Pages) PHILIPS

部品番号	74LVCH322245A

部品情報	32-bit bus transceiver with direction pin; 30 ??series termination resistors; 5 V tolerant; 3-state

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74LVCH322245A

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Product data sheet

Rev. 4 — 20 December 2011

8 of 15

NXP Semiconductors

74LVCH322245A

32-bit bus transceiver with direction pin; 30

 resistors; tolerance;

3-state

[1]

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

[2]

tpd is the same as tPLH and tPHL.

ten is the same as tPZL and tPZH.

tdis is the same as tPLZ and tPHZ.

[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

2

 f

o) = sum of the outputs.

11. Waveforms

tsk(o)

output skew

time

VCC = 3.0 V to 3.6 V

[3]

-

1.0

-

1.5

ns

CPD

power

dissipation

capacitance

per buffer; VI =GND to VCC

[4]

VCC = 1.65 V to 1.95 V

-

10.4

-

pF

VCC = 2.3 V to 2.7 V

-

14.0

-

pF

VCC = 3.0 V to 3.6 V

-

17.2

-

pF

Table 7.

Dynamic characteristics …continued

Voltages are referenced to GND (ground = 0 V). For test circuit see Figure 6.

Symbol Parameter

Conditions

Tamb = 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 4.

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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