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 V_CC.

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	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
74HC240BQ	Production	2.0 - 6.0	CMOS	± 7.8	36	8	low	-40~125	78	50	DHVQFN20
74HC240D	Production	2.0 - 6.0	CMOS	± 7.8	36	8	low	-40~125	85	61	SO20
74HC240PW	Production	2.0 - 6.0	CMOS	± 7.8	36	8	low	-40~125	100	44.7	TSSOP20
74HCT240BQ	Production	4.5 - 5.5	TTL	± 6	36	8	low	-40~125	78	50	DHVQFN20
74HCT240D	Production	4.5 - 5.5	TTL	± 6	36	8	low	-40~125	85	61	SO20
74HCT240PW	Production	4.5 - 5.5	TTL	± 6	36	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))
74HC240BQ	DHVQFN20 (SOT764-1)	SOT764-1		SOT764-1_115	Active	HC240BQ	74HC240BQ,115 ( 9352 836 83115 )
74HC240D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_653	Active	74HC240D	74HC240D,653 ( 9337 134 40653 )
74HC240PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_118	Active	HC240	74HC240PW,118 ( 9351 858 10118 )
74HCT240BQ	DHVQFN20 (SOT764-1)	SOT764-1		SOT764-1_115	Active	HCT240	74HCT240BQ,115 ( 9352 836 84115 )
74HCT240D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_653	Active	74HCT240D	74HCT240D,653 ( 9337 134 50653 )
74HCT240PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_118	Active	HCT240	74HCT240PW,118 ( 9351 895 70118 )

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))
74HC240PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_112	Withdrawn / End-of-life	HC240	74HC240PW,112 ( 9351 858 10112 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product
74HC240D	933713440652	2021-12-31	2022-06-30	74HC240D
74HC240PW	935185810112	2021-12-31	2022-06-30	74HC240PW
74HCT240D	933713450652	2021-12-31	2022-06-30	74HCT240D
74HCT240PW	935189570112	2021-12-31	2022-06-30	74HCT240PW

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74HC240BQ	74HC240BQ,115	74HC240BQ	Always Pb-free
74HC240D	74HC240D,653	74HC240D	week 27, 2004
74HC240PW	74HC240PW,118	74HC240PW	week 7, 2005
74HCT240BQ	74HCT240BQ,115	74HCT240BQ	Always Pb-free
74HCT240D	74HCT240D,653	74HCT240D	week 30, 2004
74HCT240PW	74HCT240PW,118	74HCT240PW	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	RoHS	RHF-indicator	Leadfree conversion date
74HC240PW	74HC240PW,112	74HC240PW			week 7, 2005

Quality and reliability disclaimer

Documentation (9)

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
hc	HC/HCT Spice model	SPICE model	2022-02-17
HCT_USER_GUIDE	HC/T User Guide	User manual	1997-10-31
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
hc	HC/HCT Spice model	SPICE model	2022-02-17

Ordering, pricing & availability

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