10H20EV8-4A

更新时间： 2024-01-15 10:15:14

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
17页	272K
描述
ECL programmable array logic

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10H20EV8-4A 数据手册

Philips Semiconductors Programmable Logic Devices

Product specification

ECL programmable array logic

10H20EV8/10020EV8

FUNCTIONAL DIAGRAM

CLK/I

PROGRAMMABLE AND ARRAY

(90 × 40)

OUTPUT

LOGIC

MACROCELL

OUTPUT

LOGIC

MACROCELL

OUTPUT

LOGIC

MACROCELL

OUTPUT

LOGIC

MACROCELL

OUTPUT

LOGIC

MACROCELL

OUTPUT

LOGIC

MACROCELL

OUTPUT

LOGIC

MACROCELL

OUTPUT

LOGIC

MACROCELL

RESET

PRESET

As can be seen in the Logic Diagram, the

device is a two-level logic element with a

programmable AND array. The 20EV8 can

have up to 20 inputs and 8 outputs. Each

output has a versatile Macrocell whereby the

output can either be configured as a

dedicated input, a dedicated combinatorial

output with polarity control, a bidirectional I/O,

or as a registered output that has both output

polarity control and feedback into the AND

array.

The device also features 90 product terms.

Two of the product terms can be used for a

global asynchronous preset and/or reset.

Eight of the product terms can be used for

individual output enable control of each

Macrocell. The other 80 product terms are

distributed among the outputs. Four of the

outputs have eight product terms, while the

other four have 12. This arrangement allows

the utmost in flexibility when implementing

user patterns.

FUNCTIONAL DESCRIPTION

The 10H20EV8/10020EV8 is an ultra

high-speed universal ECL PAL-type device.

Combining versatile Output Macrocells with a

standard AND/OR single programmable

array, this device is ideal in implementing a

user’s custom logic.

Output Logic Macrocell

The 10H20EV8/10020EV8 incorporates an

extremely versatile Output Logic Macrocell

that allows the user complete flexibility when

configuring outputs.

As seen in Figure 1, the 10H20EV8/

OUTPUT

SELECT

MUX

10020EV8 Output Logic Macrocell consists of

an edge-triggered D-type flip-flop, an output

select MUX, and a feedback select MUX.

CLK

Fuses S and S allow the user to select

between the various cells. S controls

whether the output will be either registered

with internal feedback or combinatorial I/O.

FEEDBACK

MUX

S controls the polarity of the output (Active-

HIGH or Active-LOW). This allows the user to

achieve the following configurations:

Registered Active-HIGH output, Registered

Active-LOW output, Combinatorial Active-

HIGH output, and Combinatorial Active-LOW

output. With the output enable product term,

this list can be extended by adding the

configurations of a Combinatorial I/O with

Polarity or another input.

Figure 1. Output Logic Macrocell

115

October 22, 1993

1 234 5 6 7...17

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