74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

The 74AHC244; 74AHCT244 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 are overvoltage tolerant. This feature allows the use of these devices as translators in mixed voltage environments.

Features and benefits

Wide supply voltage range from 2.0 V to 5.5 V
Balanced propagation delays
All inputs have Schmitt-trigger action
Overvoltage tolerant inputs to 5.5 V
High noise immunity
CMOS low power dissipation
Input levels:
- For 74AHC244: CMOS level
- For 74AHCT244: TTL level
ESD protection:
- HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
- CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Parametrics

Type number	Product status	V_CC (V)	Logic switching levels	Output drive capability (mA)	f_max (MHz)	Nr of bits	Power dissipation considerations	T_amb (°C)	R_th(j-a) (K/W)	R_th(j-c) (K/W)	Package name
74AHC244BQ	Production	2.0 - 5.5	CMOS	± 8	60	8	low	-40~125	78	50	DHVQFN20
74AHC244D	Production	2.0 - 5.5	CMOS	± 8	60	8	low	-40~125	85	61	SO20
74AHC244PW	Production	2.0 - 5.5	CMOS	± 8	60	8	low	-40~125	100	44.7	TSSOP20
74AHCT244BQ	Production	4.5 - 5.5	TTL	± 8	60	8	low	-40~125	78	50	DHVQFN20
74AHCT244D	Production	4.5 - 5.5	TTL	± 8	60	8	low	-40~125	85	61	SO20
74AHCT244PW	Production	4.5 - 5.5	TTL	± 8	60	8	low	-40~125	100	44.7	TSSOP20

Package

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74AHC244BQ	DHVQFN20 (SOT764-1)	SOT764-1		SOT764-1_115	Active	AHC244	74AHC244BQ,115 ( 9352 855 37115 )
74AHC244D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_118	Active	74AHC244D	74AHC244D,118 ( 9352 620 01118 )
74AHC244PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_118	Active	AHC244	74AHC244PW,118 ( 9352 620 02118 )
74AHCT244BQ	DHVQFN20 (SOT764-1)	SOT764-1		SOT764-1_115	Active	AHCT244	74AHCT244BQ,115 ( 9352 855 41115 )
74AHCT244D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_118	Active	74AHCT244D	74AHCT244D,118 ( 9352 619 57118 )
74AHCT244PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_118	Active	AHCT244	74AHCT244PW,118 ( 9352 619 59118 )

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))
74AHC244D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_112	Withdrawn / End-of-life	74AHC244D	74AHC244D,112 ( 9352 620 01112 )
74AHC244PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_112	Withdrawn / End-of-life	AHC244	74AHC244PW,112 ( 9352 620 02112 )
74AHCT244D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_112	Withdrawn / End-of-life	74AHCT244D	74AHCT244D,112 ( 9352 619 57112 )
74AHCT244PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_112	Withdrawn / End-of-life	AHCT244	74AHCT244PW,112 ( 9352 619 59112 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product
74AHC244D	935262001112	2021-12-31	2022-06-30	74AHC244D
74AHC244PW	935262002112	2021-12-31	2022-06-30	74AHC244PW
74AHCT244D	935261957112	2021-12-31	2022-06-30	74AHCT244D
74AHCT244PW	935261959112	2021-12-31	2022-06-30	74AHCT244PW

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74AHC244BQ	74AHC244BQ,115	74AHC244BQ	Always Pb-free
74AHC244D	74AHC244D,118	74AHC244D	week 30, 2004
74AHC244PW	74AHC244PW,118	74AHC244PW	week 7, 2005
74AHCT244BQ	74AHCT244BQ,115	74AHCT244BQ	Always Pb-free
74AHCT244D	74AHCT244D,118	74AHCT244D	week 30, 2004
74AHCT244PW	74AHCT244PW,118	74AHCT244PW	week 7, 2005

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type number	Orderable part number	Chemical content	Leadfree conversion date
74AHC244D	74AHC244D,112	74AHC244D	week 30, 2004
74AHC244PW	74AHC244PW,112	74AHC244PW	week 7, 2005
74AHCT244D	74AHCT244D,112	74AHCT244D	week 30, 2004
74AHCT244PW	74AHCT244PW,112	74AHCT244PW	week 7, 2005

Quality and reliability disclaimer

Documentation (9)

File name	Title	Type	Date
74AHC_AHCT244	Octal buffer/line driver; 3-state	Data sheet	2023-09-20
AN263	Power considerations when using CMOS and BiCMOS logic devices	Application note	2023-02-07
ahct244	ahct244 IBIS model	IBIS model	2013-04-07
ahc244	ahc244 IBIS model	IBIS model	2013-04-07
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
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
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
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
WAVE_BG-BD-1	Wave soldering profile	Wave soldering	2021-09-08

Support

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Models

File name	Title	Type	Date
ahct244	ahct244 IBIS model	IBIS model	2013-04-07
ahc244	ahc244 IBIS model	IBIS model	2013-04-07

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