CD74HCT238 高速 CMOS 逻辑 3 至 8 线路解码器多路解复用器（反向和同向）
The ’HC138, ’HC238, ’HCT138, and ’HCT238 are high speed silicon gate CMOS decoders well suited to memory address decoding or data routing applications. Both circuits feature low power consumption usually associated with CMOS circuitry, yet have speeds comparable to low power Schottky TTL logic. Both circuits have three binary select inputs (A0, A1 and A2). If the device is enabled, these inputs determine which one of the eight normally high outputs of the HC/HCT138 series will go low or which of the normally low outputs of the HC/HCT238 series will go high.
Two active low and one active high enables (E1\, E2\, and E3) are provided to ease the cascading of decoders. The decoder’s 8 outputs can drive 10 low power Schottky TTL equivalent loads
CD74HCT238 特性
- Select One Of Eight Data Outputs Active Low for 138, Active High for 238
- I/O Port or Memory Selector
- Three Enable Inputs to Simplify Cascading
- Typical Propagation Delay of 13ns 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
- 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
CD74HCT238 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 |
| CD74HCT238E |
ACTIVE |
-55 to 125 |
0.34 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
|
| CD74HCT238EE4 |
ACTIVE |
-55 to 125 |
0.34 | 1ku |
PDIP (N) | 16 |
25 | TUBE |
|
| CD74HCT238M |
ACTIVE |
-55 to 125 |
0.37 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
|
| CD74HCT238M96 |
ACTIVE |
-55 to 125 |
0.31 | 1ku |
SOIC (D) | 16 |
2500 | LARGE T&R |
|
| CD74HCT238M96E4 |
ACTIVE |
-55 to 125 |
0.31 | 1ku |
SOIC (D) | 16 |
2500 | LARGE T&R |
|
| CD74HCT238M96G4 |
ACTIVE |
-55 to 125 |
0.31 | 1ku |
SOIC (D) | 16 |
2500 | LARGE T&R |
|
| CD74HCT238ME4 |
ACTIVE |
-55 to 125 |
0.37 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
|
| CD74HCT238MG4 |
ACTIVE |
-55 to 125 |
0.37 | 1ku |
SOIC (D) | 16 |
40 | TUBE |
|
CD74HCT238 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 |
| CD74HCT238E |
Pb-Free (RoHS) |
CU NIPDAU |
N/A for Pkg Type |
CD74HCT238E |
CD74HCT238E |
| CD74HCT238EE4 |
Pb-Free (RoHS) |
CU NIPDAU |
N/A for Pkg Type |
CD74HCT238EE4 |
CD74HCT238EE4 |
| CD74HCT238M |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HCT238M |
CD74HCT238M |
| CD74HCT238M96 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HCT238M96 |
CD74HCT238M96 |
| CD74HCT238M96E4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HCT238M96E4 |
CD74HCT238M96E4 |
| CD74HCT238M96G4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HCT238M96G4 |
CD74HCT238M96G4 |
| CD74HCT238ME4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HCT238ME4 |
CD74HCT238ME4 |
| CD74HCT238MG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
CD74HCT238MG4 |
CD74HCT238MG4 |
CD74HCT238 应用技术支持与电子电路设计开发资源下载
- CD74HCT238 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)