PLUS16R8-7N datasheet(8/16 Pages) PHILIPS

Part #	PLUS16R8-7N

Description	PAL devices

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Manufacturer	PHILIPS [NXP Semiconductors]

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Philips Semiconductors Programmable Logic Devices

Product specification

PLUS16R8D/-7 SERIES

PAL devices

16L8, 16R8, 16R6, 16R4

September 10, 1993

43

FUNCTIONAL DESCRIPTIONS

The PLUS16XX series utilizes the familiar

sum-of-products implementation consisting of

a programmable AND array and a fixed OR

array. These devices are capable of replacing

an equivalent of four or more SSI/MSI

integrated circuits to reduce package count

and board area occupancy, consequently

improving reliability and design cycle over

Standard Cell or gate array options. By

programming the security fuse, proprietary

designs can be protected from duplication.

The PLUS16XX series consists of four

PAL-type devices. Depending on the

particular device type, there are a variable

number of combinatorial and registered

outputs available to the designer. The

PLUS16L8 is a combinatorial part with 8 user

configurable outputs (6 bidirectional), while

the other three devices, PLUS16R8,

PLUS16R6, PLUS16R4, have respectively 8,

6, and 4 output registers.

3-State Outputs

The PLUS16XX series devices also feature

3-State output buffers on each output pin

which can be programmed for individual

control of all outputs. The registered outputs

(Qn) are controlled by an external input

(/OE), and the combinatorial outputs (On, Bn)

use a product term to control the enable

function.

Programmable Bidirectional Pins

The PLUS16XX products feature variable

Input/Output ratios. In addition to 8 dedicated

inputs, each combinatorial output pin of the

registered devices can be individually

programmed as an input or output. The

PLUS16L8 provides 10 dedicated inputs and

6 Bidirectional I/O lines that can be

individually configured as inputs or outputs.

Output Registers

The PLUS16R8 has 8 output registers, the

16R6 has 6, and the 16R4 has 4. Each

output register is a D-type flip-flop which is

loaded on the Low-to-High transition of the

clock input. These output registers are

capable of feeding the outputs of the

registers back into the array to facilitate

design of synchronous state machines.

Power-up Reset

By resetting all flip-flops to a logic Low, as the

power is turned on, the PLUS16R8, R6, R4

enhance state machine design and

initialization capability.

Software Support

Like other Programmable Logic Devices from

Philips Semiconductors, the PLUS16XX

series are supported by SLICE, the

PC-based software development tool from

Philips Semiconductors. The PLUS16XX

family of devices are also supported by

standard CAD tools for PAL devices,

including ABEL and CUPL.

SLICE is available free of charge to qualified

users.

Logic Programming

The PLUS16XX series is fully supported by

industry standard (JEDEC compatible) PLD

CAD tools, including Philips Semiconductors

SNAP design software package. ABEL

™

CUPL

™ and PALASM® 90 design software

packages also support the PLUS16XX

architecture.

All packages allow Boolean and state

equation entry formats. SNAP, ABEL and

CUPL also accept, as input, schematic

capture format.

Programming/Software Support

Ref to Section 9

(Development Software) and

Section 10.

(Third-Party Programmer/

Software Support) of the PLD data handbook

for additional information.

AND ARRAY – (I, B)

I, B

P, D

I, B

STATE

INACTIVE1, 2

CODE

O

I, B

P, D

I, B

STATE

CODE

H

I, B

P, D

I, B

STATE

CODE

L

I, B

P, D

I, B

STATE

CODE

–

I, B

DON’T CARE

VIRGIN STATE

A factory shipped virgin device contains all

fusible links intact, such that:

1. All outputs are at “H” polarity.

2. All Pn terms are disabled.

3. All Pn terms are active on all outputs.

ABEL is a trademark of Data I/O Corp.

CUPL is a trademark of Logical Devices, Inc.

PALASM is a registered trademark of AMD Corp.

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