CD74HC251 具有三态输出的高速 CMOS 逻辑 8 输入多路复用器
The ’HC251 and ’HCT251 are 8-channel digital multiplexers with three-state outputs, fabricated with high-speed silicon-gate CMOS technology. Together with the low power consumption of standard CMOS integrated circuits, they possess the ability to drive 10 LSTTL loads. The three-state feature makes them ideally suited for interfacing with bus lines in a bus-oriented system.
This multiplexer features both true (Y) and complement (Y\) outputs as well as an output enable (OE\) input. The OE\ must be at a low logic level to enable this device. When the OE\ input is high, both outputs are in the high-impedance state. When enabled, address information on the data select inputs determines which data input is routed to the Y and Y\ outputs
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CD74HC251 |
| Rating |
Catalog |
| Technology Family |
HC |
CD74HC251 特性
- Selects One of Eight Binary Data Inputs
- Three-State Output Capability
- True and Complement Outputs
- Typical (Data to Output) Propagation Delay of 14ns at VCC = 5V, CL = 15pF, TA = 25°C
- Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
- Wide Operating Temperature Range . . . -55°C to 125°C
- Balanced Propagation Delay and Transition Times
- Significant Power Reduction Compared to LSTTL Logic ICs
- Alternate Source is Philips
- HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
- HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il
1uA at VOL, VOH
CD74HC251 芯片订购指南
| 器件 |
状态 |
温度 |
价格 |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| CD74HC251E |
ACTIVE |
-55 to 125 |
0.39 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
|
| CD74HC251EE4 |
ACTIVE |
-55 to 125 |
0.39 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
|
| CD74HC251M |
ACTIVE |
-55 to 125 |
0.42 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
|
| CD74HC251M96 |
ACTIVE |
-55 to 125 |
0.35 | 1ku |
SOIC (D) | 16 |
2500 | LARGE T&R |
|
| CD74HC251M96E4 |
ACTIVE |
-55 to 125 |
0.35 | 1ku |
SOIC (D) | 16 |
2500 | LARGE T&R |
|
| CD74HC251M96G4 |
ACTIVE |
-55 to 125 |
0.35 | 1ku |
SOIC (D) | 16 |
2500 | LARGE T&R |
|
| CD74HC251ME4 |
ACTIVE |
-55 to 125 |
0.42 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
|
| CD74HC251MG4 |
ACTIVE |
-55 to 125 |
0.42 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
|
CD74HC251 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| CD74HC251E |
Pb-Free (RoHS) |
CU NIPDAU |
N/A for Pkg Type |
CD74HC251E |
CD74HC251E |
| CD74HC251EE4 |
Pb-Free (RoHS) |
CU NIPDAU |
N/A for Pkg Type |
CD74HC251EE4 |
CD74HC251EE4 |
| CD74HC251M |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HC251M |
CD74HC251M |
| CD74HC251M96 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HC251M96 |
CD74HC251M96 |
| CD74HC251M96E4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HC251M96E4 |
CD74HC251M96E4 |
| CD74HC251M96G4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HC251M96G4 |
CD74HC251M96G4 |
| CD74HC251ME4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HC251ME4 |
CD74HC251ME4 |
| CD74HC251MG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HC251MG4 |
CD74HC251MG4 |
CD74HC251 应用技术支持与电子电路设计开发资源下载
- CD74HC251 数据资料 dataSheet 下载.PDF
- TI 德州仪器MSI 功能产品选型与价格 . xls
- Logic Guide 2009 (PDF 4263 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
- TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
- Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
- CMOS Power Consumption and CPD Calculation (PDF 89 KB)
- Designing With Logic (PDF 186 KB)
- Live Insertion (PDF 150 KB)
- Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
- Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)