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: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
- CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 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	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HC280D	SO14 (SOT108-1)	SOT108-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT108-1_653	Active	74HC280D	74HC280D,653 ( 9337 138 80653 )
74HCT280D	SO14 (SOT108-1)	SOT108-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT108-1_653	Active	74HCT280D	74HCT280D,653 ( 9337 138 90653 )
74HCT280PW	TSSOP14 (SOT402-1)	SOT402-1	SSOP-TSSOP-VSO-WAVE	SOT402-1_118	Active	4HCT280	74HCT280PWJ ( 9356 911 88118 )

Discontinuation information

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

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74HC280D	74HC280D,653	74HC280D	week 5, 2004
74HCT280D	74HCT280D,653	74HCT280D	week 5, 2004
74HCT280PW	74HCT280PWJ	74HCT280PW

Quality and reliability disclaimer

Documentation (9)

File name	Title	Type	Date
74HC_HCT280	9-bit odd/even parity generator/checker	Data sheet	2024-01-15
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
SOT402-1	plastic, thin shrink small outline package; 14 leads; 0.65 mm pitch; 5 mm x 4.4 mm x 1.2 mm body	Package information	2023-11-07
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
SOT108-1	plastic, small outline package; 14 leads; 1.27 mm pitch; 8.65 mm x 3.9 mm x 1.75 mm body	Package information	2023-11-07

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