ELECTRICAL SPECIFICATIONS

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Release B

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

4 ELECTRICAL SPECIFICATIONS

4.1 Introduction

The electrical specifications in this chapter are val-

id for the STPC Consumer-S.

4.2 Electrical Connections

4.2.1 Power/Ground Connections/Decoupling

Due to the high frequency of operation of the

STPC Consumer-S, it is necessary to install and

test this device using standard high frequency

techniques. The high clock frequencies used in

the STPC Consumer-S and its output buffer cir-

cuits can cause transient power surges when sev-

eral output buffers switch output levels simultane-

ously. These effects can be minimized by filtering

the DC power leads with low-inductance decou-

pling capacitors, using low impedance wiring, and

by utilizing all of the VSS and VDD pins.

4.2.2 Unused Input Pins

All inputs not used by the designer and not listed

in the table of pin connections in Chapter 3 should

be connected either to VDD or to VSS. Connect

active-high inputs to VDD through a 20 k

Ω (±10%)

pull-down resistor and active-low inputs to VSS

and connect active-low inputs to VCC through a

20 k

Ω (±10%) pull-up resistor to prevent spurious

operation.

4.2.3 Reserved Designated Pins

Pins designated reserved should be left discon-

nected. Connecting a reserved pin to a pull-up re-

sistor, pull-down resistor, or an active signal could

cause unexpected results and possible circuit

malfunctions.

4.3 Absolute Maximum Ratings

The following table lists the absolute maximum

ratings for the STPC Consumer-S device. Stress-

es beyond those listed under Table 4.1 limits may

cause permanent damage to the device. These

are stress ratings only and do not imply that oper-

ation under any conditions other than those spec-

ified in section ”Operating Conditions”.

Exposure to conditions beyond Table 4.1 may (1)

reduce device reliability and (2) result in prema-

ture failure even when there is no immediately ap-

parent sign of failure. Prolonged exposure to con-

ditions at or near the absolute maximum ratings

(Table 4.1) may also result in reduced useful life

and reliability.

Table 4.1. Absolute Maximum Ratings

Symbol

Parameter

Value

Units

DC Supply Voltage

-0.3, 4.0

V

Digital Input and Output Voltage

-0.3, VDD + 0.3

V

Storage Temperature

-40, +150

°C

Operating Temperature

0, +70

°C

Total Power Dissipation

4.8

W