74HC240; 74HCT240
Octal buffer/line driver; 3-state; inverting
The 74HC240; 74HCT240 is an 8-bit inverting buffer/line driver with 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes. This enables 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 74HC240: CMOS level
For 74HCT240: TTL level
Inverting 3-state outputs
ESD protection:
-
HBM JESD22-A114F exceeds 2 kV
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Parametrics
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | fmax (MHz) | Nr of bits | Power dissipation considerations | Tamb (°C) | Package name |
|---|---|---|---|---|---|---|---|---|
| 74HC240BQ | 2.0 - 6.0 | CMOS | ± 7.8 | 36 | 8 | low | -40~125 | DHVQFN20 |
| 74HC240D | 2.0 - 6.0 | CMOS | ± 7.8 | 36 | 8 | low | -40~125 | SO20 |
| 74HC240PW | 2.0 - 6.0 | CMOS | ± 7.8 | 36 | 8 | low | -40~125 | TSSOP20 |
| 74HCT240BQ | 4.5 - 5.5 | TTL | ± 6 | 36 | 8 | low | -40~125 | DHVQFN20 |
| 74HCT240D | 4.5 - 5.5 | TTL | ± 6 | 36 | 8 | low | -40~125 | SO20 |
| 74HCT240PW | 4.5 - 5.5 | TTL | ± 6 | 36 | 8 | low | -40~125 | TSSOP20 |
Package
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| 74HC240BQ | 74HC240BQ,115 (935283683115) |
Active | HC240BQ |
DHVQFN20 (SOT764-1) |
SOT764-1 | SOT764-1_115 | |
| 74HC240D | 74HC240D,653 (933713440653) |
Active | 74HC240D |
SO20 (SOT163-1) |
SOT163-1 |
WAVE_BG-BD-1
|
Not available |
| 74HC240PW | 74HC240PW,118 (935185810118) |
Active | HC240 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT360-1_118 |
| 74HCT240BQ | 74HCT240BQ,115 (935283684115) |
Active | HCT240 |
DHVQFN20 (SOT764-1) |
SOT764-1 | SOT764-1_115 | |
| 74HCT240D | 74HCT240D,653 (933713450653) |
Active | 74HCT240D |
SO20 (SOT163-1) |
SOT163-1 |
WAVE_BG-BD-1
|
Not available |
| 74HCT240PW | 74HCT240PW,118 (935189570118) |
Active | HCT240 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT360-1_118 |
All type numbers in the table below are discontinued.
| Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
|---|---|---|---|---|---|---|---|
| 74HC240PW | 74HC240PW,112 (935185810112) |
Withdrawn / End-of-life | HC240 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
Not available |
| 74HCT240DB | 74HCT240DB,112 (935174570112) |
Obsolete | HCT240 |
SSOP20 (SOT339-1) |
SOT339-1 |
SSOP-TSSOP-VSO-WAVE
|
Not available |
| 74HCT240DB,118 (935174570118) |
Obsolete | HCT240 | SOT339-1_118 |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| 74HC240BQ | 74HC240BQ,115 | 74HC240BQ |
|
|
| 74HC240D | 74HC240D,653 | 74HC240D |
|
|
| 74HC240PW | 74HC240PW,118 | 74HC240PW |
|
|
| 74HCT240BQ | 74HCT240BQ,115 | 74HCT240BQ |
|
|
| 74HCT240D | 74HCT240D,653 | 74HCT240D |
|
|
| 74HCT240PW | 74HCT240PW,118 | 74HCT240PW |
|
|
All type numbers in the table below are discontinued.
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| 74HC240PW | 74HC240PW,112 | 74HC240PW |
|
|
| 74HCT240DB | 74HCT240DB,112 | 74HCT240DB |
|
|
| 74HCT240DB | 74HCT240DB,118 | 74HCT240DB |
|
|
Documentation (17)
| File name | Title | Type | Date |
|---|---|---|---|
| 74HC_HCT240 | Octal buffer/line driver; 3-state; inverting | Data sheet | 2021-09-03 |
| AN11044 | Pin FMEA 74HC/74HCT family | Application note | 2019-01-09 |
| mgu779 | Block diagram: 74HC240BQ, 74HC240D, 74HC240DB, 74HC240N, 74HC240PW, 74HC240U, 74HCT240BQ, 74HCT240D, 74HCT240DB, 74HCT240N, 74HCT240PW | Block diagram | 2009-11-04 |
| SOT764-1 | 3D model for products with SOT764-1 package | Design support | 2019-10-03 |
| SOT163-1 | 3D model for products with SOT163-1 package | Design support | 2020-01-22 |
| SOT360-1 | 3D model for products with SOT360-1 package | Design support | 2020-01-22 |
| Nexperia_package_poster | Nexperia package poster | Leaflet | 2020-05-15 |
| DHVQFN20_SOT764-1_mk | plastic, dual in-line compatible thermal enhanced very thin quad flat package; 20 terminals; 0.5 mm pitch; 2.5 mm x 4.5 mm x 0.85 mm body | Marcom graphics | 2017-01-28 |
| TSSOP20_SOT360-1_mk | plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm body | Marcom graphics | 2017-01-28 |
| SOT764-1 | plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 20 terminals; 0.5 mm pitch; 4.5 mm x 2.5 mm x 1 mm body | Package information | 2022-06-21 |
| SOT163-1 | plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm body | Package information | 2022-06-20 |
| SOT360-1 | plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm body | Package information | 2022-06-21 |
| SOT339-1 | plastic, shrink small outline package; 20 leads; 0.65 mm pitch; 7.2 mm x 5.3 mm x 2 mm body | Package information | 2020-04-21 |
| hc | HC/HCT Spice model | SPICE model | 2022-02-17 |
| HCT_USER_GUIDE | HC/T User Guide | User manual | 1997-10-31 |
| 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 |
Support
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Models
| File name | Title | Type | Date |
|---|---|---|---|
| SOT764-1 | 3D model for products with SOT764-1 package | Design support | 2019-10-03 |
| SOT163-1 | 3D model for products with SOT163-1 package | Design support | 2020-01-22 |
| SOT360-1 | 3D model for products with SOT360-1 package | Design support | 2020-01-22 |
| hc | HC/HCT Spice model | SPICE model | 2022-02-17 |
Ordering, pricing & availability
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