74HC244; 74HCT244
Octal buffer/line driver; 3-state
The 74HC244; 74HCT244 is an 8-bit 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 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 to 6.0 V
CMOS low power dissipation
High noise immunity
Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
Input levels:
For 74HC244: CMOS level
For 74HCT244: TTL level
Octal bus interface
Non-inverting 3-state outputs
Complies with JEDEC standards:
JESD8C (2.7 V to 3.6 V)
JESD7A (2.0 V to 6.0 V)
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from -40 °C to +85 °C and -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 |
|---|---|---|---|---|---|---|---|---|
| 74HC244BQ | 2.0 - 6.0 | CMOS | ± 7.8 | 36 | 8 | low | -40~125 | DHVQFN20 |
| 74HC244D | 2.0 - 6.0 | CMOS | ± 7.8 | 36 | 8 | low | -40~125 | SO20 |
| 74HC244PW | 2.0 - 6.0 | CMOS | ± 7.8 | 36 | 8 | low | -40~125 | TSSOP20 |
| 74HCT244BQ | 4.5 - 5.5 | TTL | ± 6 | 36 | 8 | low | -40~125 | DHVQFN20 |
| 74HCT244D | 4.5 - 5.5 | TTL | ± 6 | 36 | 8 | low | -40~125 | SO20 |
| 74HCT244PW | 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 |
|---|---|---|---|---|---|---|---|
| 74HC244BQ | 74HC244BQ,115 (935273678115) |
Active | HC244 |
DHVQFN20 (SOT764-1) |
SOT764-1 | SOT764-1_115 | |
| 74HC244D | 74HC244D,653 (933713420653) |
Active | 74HC244D |
SO20 (SOT163-1) |
SOT163-1 |
WAVE_BG-BD-1
|
Not available |
| 74HC244PW | 74HC244PW,118 (935174640118) |
Active | HC244 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT360-1_118 |
| 74HCT244BQ | 74HCT244BQ,115 (935273729115) |
Active | HCT244 |
DHVQFN20 (SOT764-1) |
SOT764-1 | SOT764-1_115 | |
| 74HCT244D | 74HCT244D,653 (933713430653) |
Active | 74HCT244D |
SO20 (SOT163-1) |
SOT163-1 |
WAVE_BG-BD-1
|
Not available |
| 74HCT244PW | 74HCT244PW,118 (935165220118) |
Active | HCT244 |
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 |
|---|---|---|---|---|---|---|---|
| 74HC244D | 74HC244D,652 (933713420652) |
Withdrawn / End-of-life | 74HC244D |
SO20 (SOT163-1) |
SOT163-1 |
WAVE_BG-BD-1
|
Not available |
| 74HC244PW | 74HC244PW,112 (935174640112) |
Withdrawn / End-of-life | HC244 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
Not available |
| 74HCT244D | 74HCT244D,652 (933713430652) |
Withdrawn / End-of-life | 74HCT244D |
SO20 (SOT163-1) |
SOT163-1 |
WAVE_BG-BD-1
|
Not available |
| 74HCT244DB | 74HCT244DB,112 (935166880112) |
Obsolete | HCT244 |
SSOP20 (SOT339-1) |
SOT339-1 |
SSOP-TSSOP-VSO-WAVE
|
Not available |
| 74HCT244DB,118 (935166880118) |
Obsolete | HCT244 | SOT339-1_118 | ||||
| 74HCT244PW | 74HCT244PW,112 (935165220112) |
Withdrawn / End-of-life | HCT244 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
Not available |
Environmental information
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| 74HC244BQ | 74HC244BQ,115 | 74HC244BQ |
|
|
| 74HC244D | 74HC244D,653 | 74HC244D |
|
|
| 74HC244PW | 74HC244PW,118 | 74HC244PW |
|
|
| 74HCT244BQ | 74HCT244BQ,115 | 74HCT244BQ |
|
|
| 74HCT244D | 74HCT244D,653 | 74HCT244D |
|
|
| 74HCT244PW | 74HCT244PW,118 | 74HCT244PW |
|
|
All type numbers in the table below are discontinued.
| Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
|---|---|---|---|---|
| 74HC244D | 74HC244D,652 | 74HC244D |
|
|
| 74HC244PW | 74HC244PW,112 | 74HC244PW |
|
|
| 74HCT244D | 74HCT244D,652 | 74HCT244D |
|
|
| 74HCT244DB | 74HCT244DB,112 | 74HCT244DB |
|
|
| 74HCT244DB | 74HCT244DB,118 | 74HCT244DB |
|
|
| 74HCT244PW | 74HCT244PW,112 | 74HCT244PW |
|
|
Documentation (20)
| File name | Title | Type | Date |
|---|---|---|---|
| 74HC_HCT244 | Octal buffer/line driver; 3-state | Data sheet | 2021-07-28 |
| AN11044 | Pin FMEA 74HC/74HCT family | Application note | 2019-01-09 |
| AN263 | Power considerations when using CMOS and BiCMOS logic devices | Application note | 2023-02-07 |
| mna874 | Block diagram: 74AHC244BQ, 74AHC244D, 74AHC244PW, 74AHCT244BQ, 74AHCT244D, 74AHCT244PW, 74HC244BQ, 74HC244D, 74HC244DB, 74HC244N, 74HC244PW, 74HCT244BQ, 74HCT244D, 74HCT244DB, 74HCT244N, 74HCT244PW | Block diagram | 2009-11-04 |
| mna875 | Block diagram: 74ABT2244D, 74ABT2244DB, 74ABT2244N, 74ABT2244PW, 74ABT244D, 74ABT244DB, 74ABT244N, 74ABT244PW, 74LVC244ABQ, 74LVC244ABX, 74LVC244AD, 74LVC244ADB, 74LVC244APW, 74LVCH244ABQ, 74LVCH244ABX, 74LVCH244AD, 74LVCH244ADB, 74LVCH244APW, 74LVCH245ABX, 74HC244BQ, 74HC244D, 74HC244DB, 74HC244N, 74HC244PW, 74HCT244BQ, 74HCT244D, 74HCT244DB, 74HCT244N, 74HCT244PW | Block diagram | 2009-11-03 |
| 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 |
| D12_PC_sch_ver2_0 | D12_PC_sch_ver2_0 | Other type | 2023-09-12 |
| 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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