- 您现在的位置：买卖IC网 > PDF目录97699 > SN74BCT651NT (TEXAS INSTRUMENTS INC) BCT/FBT SERIES, 8-BIT REGISTERED TRANSCEIVER, INVERTED OUTPUT, PDIP24 PDF资料下载
参数资料
| 型号： | SN74BCT651NT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | BCT/FBT SERIES, 8-BIT REGISTERED TRANSCEIVER, INVERTED OUTPUT, PDIP24 |
| 封装： | 0.300 INCH, PLASTIC, DIP-24 |
| 文件页数： | 1/10页 |
| 文件大小： | 231K |
| 代理商： | SN74BCT651NT |
SN74BCT651
OCTAL BUS TRANSCEIVER AND REGISTER
WITH 3STATE OUTPUTS
SCBS054A AUGUST 1990 REVISED NOVEMBER 1993
Copyright
1993, Texas Instruments Incorporated
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
Independent Registers for A and B Buses
Multiplexed Real-Time and Stored Data
Inverting Data Paths
Power-Up High-Impedance Mode
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (NT)
description
This SN74BCT651 consists of bus transceiver
circuits, D-type flip-flops, and control circuitry
arranged for multiplexed transmission of data
directly from the data bus or from the internal
storage registers. Output-enable (OEAB and OEBA) inputs are provided to control the transceiver functions.
The select-control (SAB and SBA) inputs are provided to select whether real-time or stored data is transferred.
A low input level selects real-time data, and a high input level selects stored data. Figure 1 illustrates the four
fundamental bus-management functions that can be performed with the SN74BCT651.
Data on the A or B bus, or both, can be stored in the internal D flip-flops by low-to-high transitions at the
appropriate clock (CLKAB or CLKBA) inputs regardless of the select- or enable-control pins. When SAB and
SBA are in the real-time transfer mode, it is also possible to store data without using the internal D-type flip-flops
by simultaneously enabling OEAB and OEBA. In this configuration, each output reinforces its input. Thus, when
all the other data sources to the two sets of bus lines are at high impedance, each set will remain at its last state.
The SN74BCT651 is characterized for operation from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
DATA I/O
OPERATION OR FUNCTION
OEAB
OEBA
CLKAB
CLKBA
SAB
SBA
A1 THRU A8
B1 THRU B8
OPERATION OR FUNCTION
L
H
H or L
X
Input
Isolation
L
H
↑↑
X
Input
Store A and B data
X
H
↑
H or L
X
Input
Unspecified
Store A, hold B
H
↑↑
X
Input
Output
Store A in both registers
L
X
H or L
↑
X
Unspecified
Input
Hold A, store B
L
↑↑
XX
Output
Input
Store B in both registers
L
X
L
Output
Input
Real-time B data to A bus
L
X
H or L
X
H
Output
Input
Stored B data to A bus
H
X
L
X
Input
Output
Real-time A data to B bus
H
H or L
X
H
X
Input
Output
Stored A data to B bus
H
L
H or L
H
Output
Stored A data to B bus and
stored B data to A bus
The data output functions may be enabled or disabled by various signals at the OEAB or OEBA inputs. Data input functions are always enabled,
i.e., data at the bus pins will be stored on every low-to-high transition on the clock inputs.
When select control is low, clocks can occur simultaneously so long as allowances are made for propagation delays from A to B (B to A) plus
setup and hold times. When select control is high, clocks must be staggered in order to load both registers.
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
CLKAB
SAB
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
VCC
CLKBA
SBA
OEBA
B1
B2
B3
B4
B5
B6
B7
B8
DW OR NT PACKAGE
(TOP VIEW)
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.
相关PDF资料 |
PDF描述 |
|---|---|
| SN74CBT16212ADGV | CBT/FST/QS/5C/B SERIES, 24-BIT EXCHANGER, TRUE OUTPUT, PDSO56 |
| SN74CBT32245ZKER | CBT/FST/QS/5C/B SERIES, QUAD 8-BIT DRIVER, TRUE OUTPUT, PBGA96 |
| SN74CBT3244NT | CBT/FST/QS/5C/B SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDIP20 |
| SN74CBT3388DW | CBT/FST/QS/5C/B SERIES, DUAL 5-BIT EXCHANGER, TRUE OUTPUT, PDSO24 |
| SN74CBT3388PWLE | CBT/FST/QS/5C/B SERIES, DUAL 5-BIT EXCHANGER, TRUE OUTPUT, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74BCT652DW | 功能描述:总线收发器 Octal Bus Transcvrs & Reg RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74BCT652DWE4 | 功能描述:总线收发器 Octal Bus Transcvrs & Reg RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74BCT652DWG4 | 功能描述:总线收发器 Octal Bus Transceivr And Registers RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74BCT652DWR | 功能描述:总线收发器 Octal Bus Transcvrs & Reg RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| SN74BCT652DWRE4 | 功能描述:总线收发器 Octal Bus Transcvrs & Reg RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。