Datasheet > PAL16R8-42JC

PAL16R8-42JC

更新时间： 2024-11-27 04:54:23

品牌	Logo	应用领域
超微 - AMD		/
页数	文件大小	规格书
33页	218K
描述
20-Pin TTL Programmable Array Logic

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中文翻译

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数据手册

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PAL16R8-42JC 数据手册

FINAL

COM’L: -4/5/7/B/B-2/A, D/2

Advanced

Micro

PAL16R8 Family

20-Pin TTL Programmable Array Logic

Devices

DISTINCTIVE CHARACTERISTICS

■ As fast as 4.5 ns maximum propagation delay

■ Power-up reset for initialization

■ Popular 20-pin architectures: 16L8, 16R8, 16R6,

■ Extensive third-party software and programmer

16R4

support through FusionPLD partners

■ Programmable replacement for high-speed TTL

■ 20-Pin DIP and PLCC packages save space

logic

■ 28-Pin PLCC-4 package provides ultra-clean

■ Register preload for testability

high-speed signals

GENERAL DESCRIPTION

The PAL16R8 Family (PAL16L8, PAL16R8, PAL16R6,

PAL16R4) includes the PAL16R8-5/4 Series which pro-

vides the highest speed in the 20-pin TTL PAL device

family, making the series ideal for high-performance ap-

plications. The PAL16R8 Family is provided with stan-

dard 20-pin DIP and PLCC pinouts and a 28-pin PLCC

pinout. The 28-pin PLCC pinout contains seven extra

ground pins interleaved between the outputs to reduce

noise and increase speed.

The AND array is programmed to create custom product

terms, while the OR array sums selected terms at the

outputs.

In addition, the PAL device provides the following

options:

— Variable input/output pin ratio

— Programmable three-state outputs

— Registers with feedback

The devices provide user-programmable logic for re-

placing conventional SSI/MSI gates and flip-flops at a

reduced chip count.

Product terms with all connections opened assume the

logicalHIGHstate;producttermsconnectedtobothtrue

and complement of any single input assume the logical

LOW state. Registers consist of D-type flip-flops that are

loaded on the LOW-to-HIGH transition of the clock. Un-

used input pins should be tied to V_CCor GND.

The family allows the systems engineer to implement

the design on-chip, by opening fuse links to configure

AND and OR gates within the device, according to the

desired logic function. Complex interconnections be-

tween gates, which previously required time-consuming

layout, are lifted from the PC board and placed on sili-

con, where they can be easily modified during proto-

typing or production.

The entire PAL device family is supported by the

FusionPLD partners. The PAL family is programmed on

conventionalPALdeviceprogrammerswithappropriate

personality and socket adapter modules. Once the PAL

device is programmed and verified, an additional con-

nection may be opened to prevent pattern readout. This

feature secures proprietary circuits.

The PAL device implements the familiar Boolean logic

transfer function, the sum of products. The PAL device

is a programmable AND array driving a fixed OR array.

PRODUCT SELECTOR GUIDE

Dedicated

Product Terms/

Device

Inputs

Outputs

Output

Feedback

Enable

PAL16L8

6 comb.

2 comb.

I/O

–

prog.

PAL16R8

PAL16R6

8 reg.

reg.

6 reg.

2 comb.

reg.

I/O

prog.

PAL16R4

4 reg.

4 comb.

reg.

I/O

prog.

Publication# 16492 Rev. D Amendment/0

Issue Date: February 1996

2-3

12 3 4 5 6 7...33

中文翻译

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与PAL16R8-42JC相关器件

型号	品牌	获取价格	描述	数据表
PAL16R8-42PC	AMD	获取价格	20-Pin TTL Programmable Array Logic
PAL16R8-4DC	AMD	获取价格	20-Pin TTL Programmable Array Logic
PAL16R8-4JC	AMD	获取价格	20-Pin TTL Programmable Array Logic
PAL16R8-4PC	AMD	获取价格	20-Pin TTL Programmable Array Logic
PAL16R8-52DC	AMD	获取价格	20-Pin TTL Programmable Array Logic
PAL16R8-52JC	AMD	获取价格	20-Pin TTL Programmable Array Logic
PAL16R8-52PC	AMD	获取价格	20-Pin TTL Programmable Array Logic
PAL16R8-5DC	AMD	获取价格	20-Pin TTL Programmable Array Logic
PAL16R8-5JC	AMD	获取价格	20-Pin TTL Programmable Array Logic
PAL16R8-5JCT	CYPRESS	获取价格	OT PLD, 6ns, BICMOS, PQCC20, PLASTIC, LCC-20

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