CS5530A datasheet(237/259 Pages) NSC

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Revision 1.1

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5.0

Electrical Specifications

This section provides information on electrical connections,

absolute maximum ratings, recommended operating condi-

tions, and DC/AC characteristics for the Geode CS5530A.

All voltage values in the electrical specifications are with

respect to VSS unless otherwise noted.

For detailed information on the PCI bus electrical specifica-

tion refer to Chapter 4 of the PCI Bus Specification, Revi-

sion 2.1.

5.1

ELECTRICAL CONNECTIONS

5.1.1

Pull-Up Resistors

Table 5-1 lists the pins that are internally connected to a

20-kohm pull-up resistor. When unused, these inputs do

not require connection to an external pull-up resistor.

5.1.2

Unused Input Pins

All inputs not used by the system designer and not listed in

Table 5-1 should be kept at either VSS or VDD. To prevent

possible spurious operation, connect active-high inputs to

ground through a 20-kohm (±10%) pull-down resistor and

active-low inputs to VDD through a 20-kohm (±10%) pull-up

resistor.

5.1.3

NC-Designated Pins

Pins designated NC should be left disconnected. Connect-

inganNC pin toapull-up resistor,pull-down resistor, or an

active signal could cause unexpected results and possible

circuit malfunctions.

5.1.4

Power/Ground Connections and Decoupling

Testing and operating the CS5530A requires the use of

standard high frequency techniques to reduce parasitic

effects. Theseeffects canbeminimized by filteringthe DC

power leads with low-inductance decoupling capacitors,

using low-impedance wiring, and by using all of the VDD

and VSS pins.

5.2

ABSOLUTE MAXIMUM RATINGS

Table 5-2 lists absolute maximum ratings for the CS5530A.

Stresses beyond the listed ratings may cause permanent

damage to the device. Exposure to conditions beyond

these limits may (1) reduce device reliability and (2) result

in premature failure even when there is no immediately

apparent sign of failure. Prolonged exposure to conditions

at or near the absolute maximum ratings may also result in

reduced useful life and reliability These are stress ratings

only and do not imply that operation under any conditions

other than those listed under Table 5-3 is possible.

5.3

OPERATING CONDITIONS

Table 5-3 lists the recommended operating conditions for

the CS5530A.

Table5-1. Pinswith WeakInternalPull-Up

Signal Name

Type

Pin No.

IOR#

I/O

AE12

IOW#

I/O

AC11

MEMR#

I/O

AE19

MEMW#

I/O

AF20

SBHE#

I/O

AE17

SA[19:0]/

SD[19:0]

I/O

AD10, AE11, AF12, AD11,

AE25, AD24, AD22, AE21,

AF21, AC20, AD19, AF19,

AF4, AF5, AD5, AF6, AC6,

AD9, AE6, AD9

Table 5-2. Absolute Maximum Ratings

Parameter

Min

Max

Units

Comments

Operating Case Temperature

110

°C

Power Applied

Storage Temperature

–65

150

°C

No Bias

Supply Voltage

4.0

Voltage On Any Pin

–0.5

5.5

Input Clamp Current, IIK

–0.5

Power Applied

Output Clamp Current, IOK

Power Applied

Table 5-3. Operating Conditions

Symbol

Parameter (Note 1)

Min

Max

Units

Comments

Operating Case Temperature

°C

VDD

Supply Voltage

3.14

3.46

For video interface specific parameters, refer to Table 5-17 "CRT, TFT/TV and MPEG Display Timing" on page 250.

CS5530A Datasheet(PDF) 237 Page - National Semiconductor (TI)

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