TMS320DM647 datasheet(53/167 Pages) TI

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5.2 Recommended Operating Conditions

TMS320DM647/TMS320DM648

Digital Media Processor

SPRS372A – MAY 2007 – REVISED JUNE 2007

MIN

NOM

MAX

UNIT

CVDD

Supply voltage, Core (1)

CVDDESS

Supply voltage, Ethernet Subsystem Core (1)

CVDD1

Supply voltage, DDR Core (1)

(-720, -900

1.14

1.2

1.26

devices)

AVDDA

Supply voltage, SerDes Analog (1)

DVDDD

Supply voltage, SerDes Digital (1)

AVDDT

Supply voltage, SerDes Analog (1)

DVDD33

Supply voltage, I/O, 3.3 V

3.14

3.3

3.46

DVDD18

Supply voltage, DDR I/O, 1.8 V

AVDLL1

Supply voltage, I/O, 1.8 V

1.71

1.8

1.89

AVDLL2

Supply voltage, I/O, 1.8 V

AVDDR

Supply voltage, 1.8-V SerDes Analog Supply (Regulator)

VSS

Supply ground (VSS)

VREFSSTL

DDR2 reference voltage(2)

0.49DVDD18

0.5DVDD18

0.51DVDD18

High-level input voltage, 3.3 V(except I2C pins)

VIH

High-level input voltage, I2C

0.7DVDD33

Low-level input voltage, 3.3 V(except I2C pins)

0.8

VIL

Low-level input voltage, I2C

0.3DVDD33

Operating Junction temperature(3)

Commercial

°C

(-900 devices)

33.3

900

MHz

FSYSCLK1

DSP Operating Frequency (SYSCLK1)

(-720 devices)

33.3

720

MHz

(1)

Future variants of TI SOC devices may operate at voltages ranging from 0.9 V to 1.4 V to provide a range of system power/performance

options. TI highly recommends that users design-in a supply that can handle multiple voltages within this range (i.e., 1.0 V, 1.05 V,

1.1 V, 1.14 V, 1.2, 1.26 V with

± 3% tolerances) by implementing simple board changes such as reference resistor values or input pin

configuration modifications. Not incorporating a flexible supply may limit the system ability to easily adapt to future versions of TI SOC

devices.

(2)

VREFSSTL is expected to equal 0.5DVDDR2 of the transmitting device and to track variations in the DVDD18.

(3)

In the absence of a heat sink, use the following formula to determine the device junction temperature: TJ = TC + (Power x PsiJT). Power

and TC can be measured by the user.

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Device Operating Conditions

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