DSP56F803 datasheet(4/57 Pages) FREESCALE

4 / 57 page

Addendum to Rev.16 of 56F803 Technical Data, Rev. 0, 10/2015

Freescale Semiconductor, Inc.

Add missing Electrical Design Considerations section

interface. From this case temperature, the junction temperature is determined from the junction-to-case

thermal resistance.

Add missing Electrical Design Considerations section

CAUTION

This device contains protective circuitry to guard

against damage due to high static voltage or

electrical fields. However, normal precautions are

advised to avoid application of any voltages higher

than maximum rated voltages to this high-impedance

circuit. Reliability of operation is enhanced if unused

inputs are tied to an appropriate voltage level.

Use the following list of considerations to assure correct DSP operation:

•

Provide a low-impedance path from the board power supply to each VDD pin on the DSP, and from

the board ground to each VSS (GND) pin.

•

The minimum bypass requirement is to place six 0.01–0.1 mF capacitors positioned as close as

possible to the package supply pins. The recommended bypass configuration is to place one bypass

capacitor on each of the seven VDD/VSS pairs, including VDDA/VSSA. The VCAP capacitors

must be 150 milliohm or less ESR capacitors.

•

Ensure that capacitor leads and associated printed circuit traces that connect to the chip VDD and

VSS (GND) pins are less than 0.5 inch per capacitor lead.

•

Use at least a four-layer Printed Circuit Board (PCB) with two inner layers for VDD and VSS .

•

Bypass the VDD and VSS layers of the PCB with approximately 100 mF, preferably with a

highgrade capacitor such as a tantalum capacitor.

•

Because the DSP output signals have fast rise and fall times, PCB trace lengths should be minimal

Add missing Ordering part section

Table 1 lists the pertinent information needed to place an order. Consult a Freescale Semiconductor sales

office or authorized distributor to determine availability and to order parts.

Location: Section 5.2, Page 52

Location:

Section 6, Page 53

Table 1. 56F803 Ordering Information

Part

Supply

Voltage

Package Type

Pin Count

Ambient

Frequency

(MHz)

Order Number

56F803

3.0–3.6 V

Low Profile Plastic Quad Flat

Pack (LQFP)

100

DSP56F803BU80

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