ATF1502AS Просмотр технического описания (PDF) - Atmel Corporation

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ATF1502AS

High Performance E2PROM CPLD

Atmel Corporation 

PCI Compliance

The ATF1502AS also supports the growing need in the industry to support the new Peripheral

Component Interconnect (PCI) interface standard in PCI-based designs and specifications.

The PCI interface calls for high current drivers, which are much larger than the traditional TTL

drivers. In general, PLDs and FPGAs parallel outputs to support the high current load required

by the PCI interface. The ATF1502AS allows this without contributing to system noise while

delivering low output to output skew. Having a programmable high drive option is also possible

without increasing output delay or pin capacitance. The PCI electrical characteristics appear

on the next page.

PCI Voltage-to-

current Curves

for +5V

Signaling in

Pull-up Mode

VCC

2.4

Pull Up

Test Point

DC

1.4

drive point

AC drive

point

-2

-44 Current (mA) -178

PCI Voltage-to-

current Curves

for +5V

Signaling in

Pull-down Mode

VCC

Pull Down

AC drive

point

2.2

DC

drive point

0.55

3,6

Test Point

95 Current (mA) 380

10 ATF1502AS(L)

0995K–PLD–6/05

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