74HC251; 74HCT251
8-input multiplexer; 3-state
The 74HC251; 74HCT251 is an 8-bit multiplexer with eight binary inputs (I0 to I7), three select inputs (S0 to S2) and an output enable input (OE). The select inputs select one of the eight binary inputs and route it to the complementary outputs (Y and Y). A HIGH on OE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.
Features and benefits
Wide supply voltage range from 2.0 V to 6.0 V
CMOS low power dissipation
High noise immunity
Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
Complies with JEDEC standards:
- JESD8C (2.7 V to 3.6 V)
- JESD7A (2.0 V to 6.0 V)
Input levels:
For 74HC251: CMOS level
For 74HCT251: TTL level
Non-inverting data path
ESD protection:
-
HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
參數(shù)類型
| 型號 | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HC251D | 2.0?-?6.0 | CMOS | ± 5.2 | 18 | low | -40~125 | 80 | 4.1 | 38 | SO16 |
| 74HC251PW | 2.0?-?6.0 | CMOS | ± 5.2 | 18 | low | -40~125 | 114 | 2 | 41.9 | TSSOP16 |
| 74HCT251D | 4.5?-?5.5 | TTL | ± 4 | 22 | low | -40~125 | 80 | 4.1 | 38 | SO16 |
| 74HCT251PW | 4.5?-?5.5 | TTL | ± 4 | 22 | low | -40~125 | 114 | 2 | 41.9 | TSSOP16 |
封裝
| 型號 | 可訂購的器件編號，（訂購碼(12NC)） | 狀態(tài) | 標(biāo)示 | 封裝 | 外形圖 | 回流焊/波峰焊 | 包裝 |
|---|---|---|---|---|---|---|---|
| 74HC251D | 74HC251D,653 (933713520653) |
Active | 74HC251D |
SO16 (SOT109-1) |
SOT109-1 |
SO-SOJ-REFLOW
SO-SOJ-WAVE WAVE_BG-BD-1 |
暫無信息 |
| 74HC251PW | 74HC251PW,118 (935188390118) |
Active | HC251 |
TSSOP16 (SOT403-1) |
SOT403-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT403-1_118 |
| 74HCT251D | 74HCT251D,653 (933713530653) |
Active | 74HCT251D |
SO16 (SOT109-1) |
SOT109-1 |
SO-SOJ-REFLOW
SO-SOJ-WAVE WAVE_BG-BD-1 |
暫無信息 |
| 74HCT251PW | 74HCT251PW,118 (935188380118) |
Active | HCT251 |
TSSOP16 (SOT403-1) |
SOT403-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT403-1_118 |
下表中的所有產(chǎn)品型號均已停產(chǎn) 。
| 型號 | 可訂購的器件編號，（訂購碼(12NC)） | 狀態(tài) | 標(biāo)示 | 封裝 | 外形圖 | 回流焊/波峰焊 | 包裝 |
|---|---|---|---|---|---|---|---|
| 74HC251DB | 74HC251DB,112 (935188650112) |
Obsolete | HC251 |
SSOP16 (SOT338-1) |
SOT338-1 |
SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE |
暫無信息 |
| 74HC251DB,118 (935188650118) |
Obsolete | HC251 | 暫無信息 | ||||
| 74HCT251DB | 74HCT251DB,112 (935188640112) |
Obsolete | HCT251 |
SSOP16 (SOT338-1) |
SOT338-1 |
SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE |
暫無信息 |
| 74HCT251DB,118 (935188640118) |
Obsolete | HCT251 | 暫無信息 |
環(huán)境信息
| 型號 | 可訂購的器件編號 | 化學(xué)成分 | RoHS | RHF指示符 |
|---|---|---|---|---|
| 74HC251D | 74HC251D,653 | 74HC251D |
|
|
| 74HC251PW | 74HC251PW,118 | 74HC251PW |
|
|
| 74HCT251D | 74HCT251D,653 | 74HCT251D |
|
|
| 74HCT251PW | 74HCT251PW,118 | 74HCT251PW |
|
|
下表中的所有產(chǎn)品型號均已停產(chǎn) 。
| 型號 | 可訂購的器件編號 | 化學(xué)成分 | RoHS | RHF指示符 |
|---|---|---|---|---|
| 74HC251DB | 74HC251DB,112 | 74HC251DB |
|
|
| 74HC251DB | 74HC251DB,118 | 74HC251DB |
|
|
| 74HCT251DB | 74HCT251DB,112 | 74HCT251DB |
|
|
| 74HCT251DB | 74HCT251DB,118 | 74HCT251DB |
|
|
文檔 (18)
| 文件名稱 | 標(biāo)題 | 類型 | 日期 |
|---|---|---|---|
| 74HC_HCT251 | 8-input multiplexer; 3-state | Data sheet | 2024-03-14 |
| AN11044 | Pin FMEA 74HC/74HCT family | Application note | 2019-01-09 |
| AN90063 | Questions about package outline drawings | Application note | 2025-10-22 |
| SOT109-1 | 3D model for products with SOT109-1 package | Design support | 2020-01-22 |
| SOT403-1 | 3D model for products with SOT403-1 package | Design support | 2020-01-22 |
| Nexperia_package_poster | Nexperia package poster | Leaflet | 2020-05-15 |
| SO16_SOT109-1_mk | plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm body | Marcom graphics | 2017-01-28 |
| SSOP16_SOT338-1_mk | plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm body | Marcom graphics | 2017-01-28 |
| TSSOP16_SOT403-1_mk | plastic, thin shrink small outline package; 16 leads; 0.65 mm pitch; 5 mm x 4.4 mm x 1.1 mm body | Marcom graphics | 2017-01-28 |
| SOT109-1 | plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm body | Package information | 2023-11-07 |
| SOT338-1 | plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm body | Package information | 2022-06-20 |
| SOT403-1 | plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm body | Package information | 2023-11-08 |
| SO-SOJ-REFLOW | Footprint for reflow soldering | Reflow soldering | 2009-10-08 |
| SSOP-TSSOP-VSO-REFLOW | Footprint for reflow soldering | Reflow soldering | 2009-10-08 |
| HCT_USER_GUIDE | HC/T User Guide | User manual | 1997-10-31 |
| SO-SOJ-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
| WAVE_BG-BD-1 | Wave soldering profile | Wave soldering | 2021-09-08 |
| SSOP-TSSOP-VSO-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
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