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SN74ACT2440

更新时间： 2024-02-03 17:35:34
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
33页 544K
描述
NuBusE INTERFACE CONTROLLER

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SN74ACT2440 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：LCC
包装说明：QCCJ,针数：68
Reach Compliance Code：not_compliant风险等级：5.84
接口集成电路类型：INTERFACE CIRCUITJESD-30 代码：S-PQCC-J68
长度：24.2316 mm功能数量：1
端子数量：68最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：QCCJ封装形状：SQUARE
封装形式：CHIP CARRIER峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：5.08 mm
最大供电电压：5.5 V最小供电电压：4.5 V
标称供电电压：5 V表面贴装：YES
技术：CMOS温度等级：INDUSTRIAL
端子形式：J BEND端子节距：1.27 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：24.2316 mmBase Number Matches：1

SN74ACT2440 数据手册

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SN74ACT2440  
NuBus INTERFACE CONTROLLER  
SCHS010 – D3158, OCTOBER 1988 – REVISED JANUARY 1991  
FN PACKAGE  
(TOP VIEW)  
• Designed for NuBus Interface  
Applications  
• Supports Master, Slave, and Master/Slave  
Applications  
9
8 7 6 5 4 3 2 1  
68  
6766 65 64 63 6261  
60  
• Conforms to ANSI/IEEE Std 1196-1987  
RESET  
ARB0  
GND  
ARB1  
GND  
ARB2  
GND  
ARB3  
GND  
10  
A1  
A0  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
59  
58  
57  
• Designed to Operate With SN74BCT2420  
V
CC  
SIACK  
NuBus Data/Address Interface Devices  
• Supports NuBus 1987 Block Transfers  
56 SGNTA  
55 LOCTM1  
54 LOCTM0  
53 NMREQ  
52 GND  
With the Addition of the SN74ALS2442  
• EPIC (Enhanced Performance Implanted  
CMOS) 1-µm Process  
V
51 MHOLD  
CC  
• Fully TTL-Compatible  
START  
ACK  
LACK  
MLREQ  
MRDY  
50  
49  
48  
47  
46  
45  
44  
• Dependable Texas Instruments Quality and  
GND  
RQST  
GND  
NMRQ  
CLK  
Reliability  
NREQ  
MDONE  
NLOCK  
NMSTR  
description  
27 28 2930 3132 33 343536 37 38 39 40 4142 43  
The SN74ACT2440 NuBus Controller handles  
NuBus signaling protocol in compliance with  
ANSI/IEEE Std 1196-1987. The device allows a  
simple connection to the NuBus ; typical  
configurations include master-only, slave-only,  
and master/slave. Additionally, it provides extra status and control lines to facilitate more sophisticated  
approaches. With the addition of the SN74ALS2442, slave block transfers can be supported by this device. For  
additional details on block transfers, consult the SN74ALS2442 data sheet and the application note titled  
Supporting NuBus Block Slave Transfers Using Texas Instruments SN74ACT2440, SN74BCT2420, and  
SN74ALS2442.  
Figure 1 shows a typical NuBus interface using the ’ACT2440. Data and address buffering is handled via two  
SN74BCT2420s. The SN74BCT2420s are BiCMOS buffers designed specifically for supporting NuBus  
interfacing. The ’ACT2440 provides the buffer control signals needed to directly drive the SN74BCT2420s;  
however, in simpler applications, standard SSI and MSI buffers may be used in place of the ’BCT2420s.  
The ’ACT2440 is comprised of five major signal groups: byte decode signals, data/address interface-control  
signals, master/slave input signals, NuBus card-slot signals, and NuBus status signals. Byte decode  
determines which type of NuBus cycle is being performed. Data/address interface control provides the  
buffering signals required to multiplex and de-multiplex the NuBus data/address lines. The master/slave  
inputs control the master- and slave-state machines. The NuBus card-slot signals interface with the NuBus .  
The NuBus status signals indicate the status of the master/slave-state machines and provide buffered  
NuBus signals. Refer to Table 1 for additional details.  
The SN74ACT2440 is characterized for operation from 0°C to 70°C.  
NuBus is a trademark of Texas Instruments Incorporated.  
EPIC is a trademark of Texas Instruments Incorporated.  
Copyright 1991, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...33

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