74HC259; 74HCT259

8-bit addressable latch

The 74HC259; 74HCT259 is an 8-bit addressable latch. The device features four modes of operation. In the addressable latch mode, data on the D input is written into the latch addressed by the inputs A0 to A3. The addressed latch will follow the data input, non-addressed latches will retain their previous states. In memory mode, all latches retain their previous states and are unaffected by the data or address inputs. In the 3-to-8 decoding or demultiplexing mode, the addressed output follows the D input and all other outputs are LOW. In the reset mode, all outputs are forced LOW and unaffected by the data or address inputs. 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
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)
Combined demultiplexer and 8-bit latch
Serial-to-parallel capability
Output from each storage bit available
Random (addressable) data entry
Easily expandable
Common reset input
Useful as a 3-to-8 active HIGH decoder
Input levels:
- For 74HC259: CMOS level
- For 74HCT259: 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
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)	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
74HC259BQ	Production	2.0 - 6.0	CMOS	± 5.2	18	low	-40~125	89	10.8	57	DHVQFN16
74HC259D	Production	2.0 - 6.0	CMOS	± 5.2	18	low	-40~125	88	7.7	47	SO16
74HC259PW	Production	2.0 - 6.0	CMOS	± 5.2	18	low	-40~125	121	3.6	49.9	TSSOP16
74HCT259BQ	Production	4.5 - 5.5	TTL	± 4	20	low	-40~125	89	10.8	57	DHVQFN16
74HCT259D	Production	4.5 - 5.5	TTL	± 4	20	low	-40~125	88	7.7	47	SO16
74HCT259PW	Production	4.5 - 5.5	TTL	± 4	20	low	-40~125	121	3.6	49.9	TSSOP16

Package

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HC259BQ	DHVQFN16 (SOT763-1)	SOT763-1		SOT763-1_115	Active	HC259	74HC259BQ,115 ( 9352 884 55115 )
74HC259D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_653	Active	74HC259D	74HC259D,653 ( 9337 146 50653 )
74HC259PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_118	Active	HC259	74HC259PW,118 ( 9351 746 90118 )
74HCT259BQ	DHVQFN16 (SOT763-1)	SOT763-1		SOT763-1_115	Active	HCT259	74HCT259BQ,115 ( 9352 884 56115 )
74HCT259D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_653	Active	74HCT259D	74HCT259D,653 ( 9337 151 30653 )
74HCT259PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_118	Active	HCT259	74HCT259PW,118 ( 9351 884 10118 )

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))
74HC259D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_652	Withdrawn / End-of-life	74HC259D	74HC259D,652 ( 9337 146 50652 )
74HCT259D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_652	Withdrawn / End-of-life	74HCT259D	74HCT259D,652 ( 9337 151 30652 )
74HCT259PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_112	Withdrawn / End-of-life	HCT259	74HCT259PW,112 ( 9351 884 10112 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product
74HC259D	933714650652	2021-12-31	2022-06-30	74HC259D
74HC259PW	935174690112	2021-12-31	2022-06-30	74HC259PW
74HCT259D	933715130652	2021-12-31	2022-06-30	74HCT259D
74HCT259PW	935188410112	2021-12-31	2022-06-30	74HCT259PW

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74HC259BQ	74HC259BQ,115	74HC259BQ	Always Pb-free
74HC259D	74HC259D,653	74HC259D	week 6, 2004
74HC259PW	74HC259PW,118	74HC259PW	week 10, 2005
74HCT259BQ	74HCT259BQ,115	74HCT259BQ	Always Pb-free
74HCT259D	74HCT259D,653	74HCT259D	week 30, 2004
74HCT259PW	74HCT259PW,118	74HCT259PW	week 10, 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
74HC259D	74HC259D,652	74HC259D	week 6, 2004
74HCT259D	74HCT259D,652	74HCT259D	week 30, 2004
74HCT259PW	74HCT259PW,112	74HCT259PW	week 10, 2005

Quality and reliability disclaimer

Documentation (12)

File name	Title	Type	Date
74HC_HCT259	8-bit addressable latch	Data sheet	2024-03-11
AN11044	Pin FMEA 74HC/74HCT family	Application note	2019-01-09
hc259	74HC259 IBIS model	IBIS model	2022-10-21
hct259	74HCT259 IBIS model	IBIS model	2022-10-21
HCT_USER_GUIDE	HC/T User Guide	User manual	1997-10-31
SOT763-1	plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm body	Package information	2023-05-11
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
SOT109-1	plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm body	Package information	2023-11-07
SOT403-1	plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm body	Package information	2023-11-08
SSOP-TSSOP-VSO-WAVE	Footprint for wave soldering	Wave soldering	2009-10-08

Support

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Models

File name	Title	Type	Date
hc259	74HC259 IBIS model	IBIS model	2022-10-21
hct259	74HCT259 IBIS model	IBIS model	2022-10-21

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