DSP56371D datasheet(5/102 Pages) MOTOROLA

Part #	DSP56371D

Description	high density CMOS device

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Manufacturer	MOTOROLA [Motorola, Inc]

Direct Link	http://www.freescale.com

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AC Electrical Characteristics

MOTOROLA

DSP56371 Technical Data

5

6.0

AC Electrical Characteristics

The timing waveforms shown in the AC electrical characteristics section are tested with a VIL maximum of

0.8V and a VIH minimum of 2.0V for all pins. AC timing specifications, which are referenced to a device

input signal, are measured in production with respect to the 50% point of the respective input signal’s

transition. DSP56371 output levels are measured with the production test machine VOL and VOH reference

levels set at 1.0V and 1.8V, respectively.

NOTE: Although the minimum value for the frequency of EXTAL is 0 MHz (PLL bypassed), the

device AC test conditions are 5 MHz and rated speed.

7.0

Internal Clocks

Table 4 INTERNAL CLOCKS

No.

Characteristics

Symbol

Min

Typ

Max UNIT

Condition

1

Comparison Frequency

Fref[1]

5--

20

MHZ

Fref = FN/NR

2

Input Clock Frequency

FIN

Fref*NR

NR is input divider

value

3

Output clock Frequency

(with PLL enabled[2] [3]

FOUT

75

(1000/Etc

× MF x

FM)/

(PDF

× DF x OD)

--

MHZ

FOUT=FVCO/NO

where NO is output

divider value

4

Output clock Frequency

(with PLL disabled[2] [3]

FOUT

--

1000/Etc

--

MHZ

---

5

Duty Cycle

--

40

50

60

%

FVCO=300MHZ~60

0MHZ

Note:

1.

See users manual for definition.

2.

DF = Division Factor

Ef = External frequency

MF = Multiplication Factor

PDF = Predivision Factor

FM= Feedback Multiplier

OD = Output Divider

3.

Maximum frequency will vary depending on the ordered part number.

Freescale Semiconductor, Inc.

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Go to: www.freescale.com

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DSP56371D Datasheet(PDF) 5 Page - Motorola, Inc

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