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74HC244DB

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.

This product has been discontinued, click here for discontinuation information and replacement parts.

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 Product status Package name
74HC244DB End of life SSOP20

PCB Symbol, Footprint and 3D Model

Model Name Description

Package

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type number Orderable part number, (Ordering code (12NC)) Status Marking Package Package information Reflow-/Wave soldering Packing
74HC244DB 74HC244DB,112
(935166890112)
Obsolete no package information
74HC244DB,118
(935166890118)
Obsolete

Environmental information

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type number Orderable part number Chemical content RoHS RHF-indicator
74HC244DB 74HC244DB,112 74HC244DB rohs rhf rhf
74HC244DB 74HC244DB,118 74HC244DB rohs rhf rhf
Quality and reliability disclaimer

Documentation (6)

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
D12_PC_sch_ver2_0 D12_PC_sch_ver2_0 Other type 2023-09-12
hc HC/HCT Spice model SPICE model 2022-02-17
HCT_USER_GUIDE HC/T User Guide User manual 1997-10-31

Support

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Models

File name Title Type Date
hc HC/HCT Spice model SPICE model 2022-02-17

PCB Symbol, Footprint and 3D Model

Model Name Description

How does it work?

The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.