74AHC257; 74AHCT257
Quad 2-input multiplexer; 3-state
The 74AHC257; 74AHCT257 is a quad 2-input multiplexer with 3-state outputs. Inputs are overvoltage tolerant. This feature allows the use of these devices as translators in mixed voltage environments.
Features and benefits
Balanced propagation delays
All inputs have Schmitt-trigger actions
Non-inverting data path
Wide supply voltage range from 2.0 V to 5.5 V
Input levels:
For 74AHC257: CMOS level
For 74AHCT257: TTL level
Overvoltage tolerant inputs to 5.5 V
High noise immunity
CMOS low power dissipation
Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 74AHC257D | 2.0?-?5.5 | CMOS | ± 8 | 2.9 | low | -40~125 | 94 | 10.3 | 53 | SO16 |
| 74AHC257PW | 2.0?-?5.5 | CMOS | ± 8 | 2.9 | low | -40~125 | 126 | 4.9 | 56.3 | TSSOP16 |
| 74AHCT257D | 4.5?-?5.5 | TTL | ± 8 | 3.7 | low | -40~125 | 93 | 9.7 | 52 | SO16 |
| 74AHCT257PW | 4.5?-?5.5 | TTL | ± 8 | 3.7 | low | -40~125 | 125 | 4.6 | 54.9 | 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 |
|---|---|---|---|---|---|---|---|
| 74AHC257D | 74AHC257D,118 (935265467118) |
Active | 74AHC257D |
SO16 (SOT109-1) |
SOT109-1 |
SO-SOJ-REFLOW
SO-SOJ-WAVE WAVE_BG-BD-1 |
SOT109-1_118 |
| 74AHC257PW | 74AHC257PW,118 (935265468118) |
Active | AHC257 |
TSSOP16 (SOT403-1) |
SOT403-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT403-1_118 |
| 74AHCT257D | 74AHCT257D,118 (935265469118) |
Active | 74AHCT257D |
SO16 (SOT109-1) |
SOT109-1 |
SO-SOJ-REFLOW
SO-SOJ-WAVE WAVE_BG-BD-1 |
SOT109-1_118 |
| 74AHCT257PW | 74AHCT257PW,118 (935265470118) |
Active | AHCT257 |
TSSOP16 (SOT403-1) |
SOT403-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT403-1_118 |
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 |
|---|---|---|---|---|
| 74AHC257D | 74AHC257D,118 | 74AHC257D |
|
|
| 74AHC257PW | 74AHC257PW,118 | 74AHC257PW |
|
|
| 74AHCT257D | 74AHCT257D,118 | 74AHCT257D |
|
|
| 74AHCT257PW | 74AHCT257PW,118 | 74AHCT257PW |
|
|
文檔 (16)
| 文件名稱 | 標(biāo)題 | 類型 | 日期 |
|---|---|---|---|
| 74AHC_AHCT257 | Quad 2-input multiplexer; 3-state | Data sheet | 2024-03-07 |
| AN90063 | Questions about package outline drawings | Application note | 2025-06-13 |
| 001aad468 | Block diagram: 74AHC257D, 74AHC257PW, 74AHCT257D, 74AHCT257PW | Block diagram | 2009-11-03 |
| 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 |
| ahc257 | ahc257 IBIS model | IBIS model | 2013-04-08 |
| ahct257 | ahct257 IBIS model | IBIS model | 2013-04-08 |
| 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 |
| 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 |
| 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 |
| 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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