74HC280; 74HCT280

9-bit odd/even parity generator/checker

The 74HC280; 74HCT280 is a 9-bit parity generator or checker. Both even and odd parity outputs are available. The even parity output (PE) is HIGH when an even number of data inputs (I0 to I8) is HIGH. The odd parity output (PO) is HIGH when an odd number of data inputs are HIGH. Expansion to larger word sizes is accomplished by tying the even outputs (PE) of up to nine parallel devices to the final stage data inputs. Inputs include clamp diodes. It enables the use of current limiting resistors to interface inputs to voltages in excess of V_CC.

Features and benefits

Word-length easily expanded by cascading
Generates either odd or even parity for nine data bits
Wide supply voltage range from 2.0 to 6.0 V
Input levels:
- For 74HC280: CMOS level
- For 74HCT280: TTL level
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)
ESD protection:
- HBM JESD22-A114F exceeds 2000 V
- MM JESD22-A115-A exceeds 200 V
Specified from -40 °C to +85 °C and -40 °C to +125 °C

Parametrics

Type number	Product status	V_CC (V)	Logic switching levels	Output drive capability (mA)	t_pd (ns)	Power dissipation considerations	T_amb (°C)	R_th(j-a) (K/W)	Ψ_th(j-top) (K/W)	R_th(j-c) (K/W)	Package name
74HC280D	Production	2.0 - 6.0	CMOS	± 5.2	17	low	-40~125	73	1.0	30	SO14
74HCT280D	Production	4.5 - 5.5	TTL	± 4	18	low	-40~125	76	1.0	34	SO14
74HCT280PW	Production	4.5 - 5.5	TTL	± 4	18	low	-40~125				TSSOP14

Package

Type number	Package	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HC280D	SO14 (SOT108-1)	SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1 CECC	Active	74HC280D	74HC280D,653 ( 9337 138 80653 )
74HCT280D	SO14 (SOT108-1)	SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1 CECC	Active	74HCT280D	74HCT280D,653 ( 9337 138 90653 )
74HCT280PW	TSSOP14 (SOT402-1)	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	4HCT280	74HCT280PWJ ( 9356 911 88118 )

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))
74HC280D	SO14 (SOT108-1)		SO-SOJ-REFLOW SO-SOJ-WAVE	Bulk Pack, CECC	Withdrawn / End-of-life	74HC280D	74HC280D,652 ( 9337 138 80652 )
74HCT280D	SO14 (SOT108-1)		SO-SOJ-REFLOW SO-SOJ-WAVE	Bulk Pack, CECC	Withdrawn / End-of-life	74HCT280D	74HCT280D,652 ( 9337 138 90652 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product	DN Notice	Status	Comments
74HC280D	933713880652	2021-12-31	2022-06-30	74HC280D	DN CN-202106011DN
74HCT280D	933713890652	2021-12-31	2022-06-30	74HCT280D	DN CN-202106011DN

Quality, reliability & chemical content

Type number	Orderable part number	Chemical content	Leadfree conversion date	EFR	IFR	MTBF (hour)	MSL	MSL leadfree
74HC280D	74HC280D,653	74HC280D	week 5, 2004	40.0	1.4	7.46E8	1	1
74HCT280D	74HCT280D,653	74HCT280D	week 5, 2004	40.0	1.4	7.46E8	1	1
74HCT280PW	74HCT280PWJ	74HCT280PW		40.0	1.4	7.46E8	1	1

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	Leadfree conversion date	EFR	IFR	MTBF (hour)	MSL	MSL leadfree
74HC280D	74HC280D,652	74HC280D		week 5, 2004	40.0	1.4	7.46E8	1	1
74HCT280D	74HCT280D,652	74HCT280D		week 5, 2004	40.0	1.4	7.46E8	1	1

Quality and reliability disclaimer

Documentation (7)

File name	Title	Type	Date
74HC_HCT280	9-bit odd/even parity generator/checker	Data sheet	2021-08-16
AN11044	Pin FMEA 74HC/74HCT family	Application note	2019-01-09
HCT_USER_GUIDE	HC/T User Guide	User manual	1997-10-31
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SO-SOJ-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08
SO-SOJ-REFLOW	Footprint for reflow soldering	Reflow soldering	2009-10-08
WAVE_BG-BD-1	Wave soldering profile	Wave soldering	2021-09-08

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