Features and benefits
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Wide supply voltage range from 2.0 V to 6.0 V
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CMOS low power dissipation
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High noise immunity
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Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
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Complies with JEDEC standards:
- JESD8C (2.7 V to 3.6 V)
- JESD7A (2.0 V to 6.0 V)
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Non-inverting data path
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3-state outputs interface directly with system bus
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Input levels:
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For 74HC257: CMOS level
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For 74HCT257: TTL level
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- ESD protection:
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HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
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CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
-
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Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Parametrics
| Type number | Product status | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 74HC257D | Production | 2.0 - 6.0 | CMOS | ± 7.8 | 11 | low | -40~125 | 92 | 9.6 | 52 | SO16 |
| 74HC257PW | Production | 2.0 - 6.0 | CMOS | ± 7.8 | 11 | low | -40~125 | 125 | 4.5 | 54.6 | TSSOP16 |
| 74HCT257D | Production | 4.5 - 5.5 | TTL | ± 6 | 13 | low | -40~125 | 92 | 9.6 | 52 | SO16 |
| 74HCT257PW | Production | 4.5 - 5.5 | TTL | ± 6 | 13 | low | -40~125 | 125 | 4.5 | 54.6 | TSSOP16 |
Package
| Type number | Package | Package information | Reflow-/Wave soldering | Packing | Status | Marking | Orderable part number, (Ordering code (12NC)) |
|---|---|---|---|---|---|---|---|
| 74HC257D |  SO16 (SOT109-1) | SOT109-1 | SO-SOJ-REFLOW SO-SOJ-WAVE | SOT109-1_653 | Active | 74HC257D | 74HC257D,653 ( 9337 136 40653 ) |
| 74HC257PW |  TSSOP16 (SOT403-1) | SOT403-1 | SSOP-TSSOP-VSO-WAVE | SOT403-1_118 | Active | HC257 | 74HC257PW,118 ( 9351 746 80118 ) |
| 74HCT257D | SO16 (SOT109-1) | SOT109-1 | SO-SOJ-REFLOW SO-SOJ-WAVE | SOT109-1_653 | Active | 74HCT257D | 74HCT257D,653 ( 9337 136 50653 ) |
| 74HCT257PW | TSSOP16 (SOT403-1) | SOT403-1 | SSOP-TSSOP-VSO-WAVE | SOT403-1_118 | Active | HCT257 | 74HCT257PW,118 ( 9351 884 00118 ) |
The variants in the table below are discontinued. See the table Discontinuation information for more information.
| Type number | Package | Package information | Reflow-/Wave soldering | Packing | Status | Marking | Orderable part number, (Ordering code (12NC)) |
|---|---|---|---|---|---|---|---|
| 74HC257D | SO16 (SOT109-1) | SOT109-1 | SO-SOJ-REFLOW SO-SOJ-WAVE | SOT109-1_652 | Withdrawn / End-of-life | 74HC257D | 74HC257D,652 ( 9337 136 40652 ) |
| 74HCT257D | SO16 (SOT109-1) | SOT109-1 | SO-SOJ-REFLOW SO-SOJ-WAVE | SOT109-1_652 | Withdrawn / End-of-life | 74HCT257D | 74HCT257D,652 ( 9337 136 50652 ) |
Discontinuation information
| Type number | Orderable part number, (Ordering code (12NC)) | Last time buy date | Last time delivery date | Replacement product | Status | Comments |
|---|---|---|---|---|---|---|
| 74HC257D | 933713640652 | 2021-12-31 | 2022-06-30 | 74HC257D | ||
| 74HC257PW | 935174680112 | 2018-12-31 | 2019-06-30 | 74HC257PW | ||
| 74HCT257D | 933713650652 | 2021-12-31 | 2022-06-30 | 74HCT257D | ||
| 74HCT257D/AU | 935301266118 | |||||
| 74HCT257PW | 935188400112 | 2018-12-31 | 2019-06-30 | 74HCT257PW |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator | Leadfree conversion date |
|---|---|---|---|---|---|
| 74HC257D | 74HC257D,653 | 74HC257D |  |   | week 12, 2005 |
| 74HC257PW | 74HC257PW,118 | 74HC257PW | | | week 10, 2005 |
| 74HCT257D | 74HCT257D,653 | 74HCT257D | | | week 35, 2004 |
| 74HCT257PW | 74HCT257PW,118 | 74HCT257PW | | | week 10, 2005 |
The variants in the table below are discontinued. See the table Discontinuation information for more information.
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator | Leadfree conversion date |
|---|---|---|---|---|---|
| 74HC257D | 74HC257D,652 | 74HC257D | | | week 12, 2005 |
| 74HCT257D | 74HCT257D,652 | 74HCT257D | | | week 35, 2004 |
Documentation (9)
| File name | Title | Type | Date |
|---|---|---|---|
| 74HC_HCT257 | Quad 2-input multiplexer; 3-state | Data sheet | 2024-03-22 |
| AN11044 | Pin FMEA 74HC/74HCT family | Application note | 2019-01-09 |
| HCT_USER_GUIDE | HC/T User Guide | User manual | 1997-10-31 |
| SO-SOJ-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
| SO-SOJ-REFLOW | Footprint for reflow soldering | Reflow soldering | 2009-10-08 |
| WAVE_BG-BD-1 | Wave soldering profile | Wave soldering | 2021-09-08 |
| 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 |
| SSOP-TSSOP-VSO-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
Support
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Ordering, pricing & availability
Sample
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