參數(shù)資料
型號: ATF2500C-20PU
廠商: Atmel
文件頁數(shù): 23/24頁
文件大小: 0K
描述: IC CPLD EE 20NS 40DIP
標(biāo)準(zhǔn)包裝: 100
系列: ATF2500C(L)
可編程類型: 系統(tǒng)內(nèi)可編程
最大延遲時間 tpd(1): 20.0ns
電壓電源 - 內(nèi)部: 4.5 V ~ 5.5 V
宏單元數(shù): 24
輸入/輸出數(shù): 24
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 40-DIP(0.600",15.24mm)
供應(yīng)商設(shè)備封裝: 40-PDIP
包裝: 管件
產(chǎn)品目錄頁面: 608 (CN2011-ZH PDF)
8
0777K–PLD–1/24/08
ATF2500C
Figure 8-2.
I/O Diagram
9.
Functional Logic Diagram Description
The ATF2500C functional logic diagram describes the interconnections between the input, feed-
back pins and logic cells. All interconnections are routed through the single global bus.
The ATF2500Cs are straightforward and uniform PLDs. The 24 macrocells are numbered 0
through 23. Each macrocell contains 17 AND gates. All AND gates have 172 inputs. The five
lower product terms provide AR1, CK1, CK2, AR2, and OE. These are: one asynchronous reset
and clock per flip-flop, and an output enable. The top 12 product terms are grouped into three
sum terms, which are used as shown in the macrocell diagrams.
Eight synchronous preset terms are distributed in a 2/4 pattern. The first four macrocells share
Preset 0, the next two share Preset 1, and so on, ending with the last two macrocells sharing
Preset 7.
The 14 dedicated inputs and their complements use the numbered positions in the global bus as
shown. Each macrocell provides six inputs to the global bus: (left to right) feedback F2
(1) true
and false, flip-flop Q1 true and false, and the pin true and false. The positions occupied by these
signals in the global bus are the six numbers in the bus diagram next to each macrocell.
Note:
1. Either the flip-flop input (D/T2) or output (Q2) may be fed back in the ATF2500Cs.
INPUT
PROGRAMMABLE
OPTION
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ATF2500CL-20JC 功能描述:IC CPLD 24 MACRO 20NS 40PLCC 制造商:microchip technology 系列:ATF2500C(L) 包裝:管件 零件狀態(tài):停產(chǎn) 可編程類型:系統(tǒng)內(nèi)可編程 延遲時間 tpd(1)最大值:20.0ns 電源電壓 - 內(nèi)部:4.75 V ~ 5.25 V 宏單元數(shù):24 I/O 數(shù):24 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:44-LCC(J 形引線) 供應(yīng)商器件封裝:44-PLCC(16.58x16.58) 基本零件編號:ATF2500 標(biāo)準(zhǔn)包裝:27
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