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參數資料
| 型號： | MC74HC242 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Quad 3-State Bus Transceiver |
| 中文描述： | 四三態總線收發器 |
| 文件頁數： | 3/5頁 |
| 文件大小： | 119K |
| 代理商： | MC74HC242 |
MC74HC242
High–Speed CMOS Logic Data
DL129 — Rev 6
3
MOTOROLA
AC CHARACTERISTICS
(CL = 50 pF, Input tr = tf = 6 ns)
V
Guaranteed Limit
Symbol
Parameter
VCC
–55 to 25
°
C
≤
85
°
C
≤
125
°
C
Unit
tPLH,
tPHL
Maximum Propagation Delay, A to B or B to A
(Figures 2 and 4)
2.0
4.5
6.0
100
20
17
125
25
21
150
30
26
ns
tPLZ,
tPHZ
Maximum Propagation Delay, Output Enable to Output A or B
(Figures 3 and 5)
2.0
4.5
6.0
150
30
26
190
38
33
225
45
38
ns
tPZL,
tPZH
Maximum Propagation Delay, Output Enable to Output A or B
(Figures 3 and 5)
2.0
4.5
6.0
150
30
26
190
38
33
225
45
38
ns
tTLH,
tTHL
Maximum Output Transition Time, Any Output
(Figures 2 and 4)
2.0
4.5
6.0
60
12
10
75
15
13
90
18
15
ns
Cin
Cout
Maximum Input Capacitance
10
10
10
pF
Maximum Three–State Output Capacitance (Output in High Impedance
State)
15
15
15
pF
NOTE:For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the Motorola High–
Speed CMOS Data Book (DL129/D).
CPD
Power Dissipation Capacitance (Per Transceiver)*
* Used to determine the no–load dynamic power consumption: PD = CPD VCC2f + ICC VCC. For load considerations, see Chapter 2 of the
Motorola High–Speed CMOS Data Book (DL129/D).
Typical @ 25
°
C, VCC = 5.0 V
31
pF
PIN DESCRIPTIONS
DATA PORTS
A1–A4 (Pins 3,4,5,6) and B1–B4 (Pins 11,10,9,8)
Data on these pins may be transferred between data
buses. Depending upon the states of the Output Enables,
these pins may be inputs, outputs or open circuits (high–im-
pedance).
CONTROL INPUTS
A–to–B Enable (Pin 1) and B–to–A Enable (Pin 13)
Data on these Output Enables determine both the direc-
tion of the data flow (from A to B or from B to A) and the
states of the outputs (standard or high impedance), accord-
ing to the Function Table.
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相關代理商/技術參數 |
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| MC74HC244ADT | 功能描述:緩沖器和線路驅動器 2-6V Octal 3-State RoHS:否 制造商:Micrel 輸入線路數量:1 輸出線路數量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| MC74HC244ADTEL | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC74HC244ADTG | 功能描述:緩沖器和線路驅動器 2-6V Octal 3-State Non-Inverting RoHS:否 制造商:Micrel 輸入線路數量:1 輸出線路數量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| MC74HC244ADTR2 | 功能描述:緩沖器和線路驅動器 2-6V Octal 3-State RoHS:否 制造商:Micrel 輸入線路數量:1 輸出線路數量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| MC74HC244ADTR2G | 功能描述:緩沖器和線路驅動器 2-6V Octal 3-State Non-Inverting RoHS:否 制造商:Micrel 輸入線路數量:1 輸出線路數量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
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