74HC573; 74HCT573

Octal D-type transparent latch; 3-state

The 74HC573; 74HCT573 is an 8-bit D-type transparent latch with 3-state outputs. The device features latch enable (LE) and output enable (OE) inputs. When LE is HIGH, data at the inputs enter the latches. In this condition the latches are transparent, a latch output will change each time its corresponding D-input changes. When LE is LOW the latches store the information that was present at the inputs a set-up time preceding the HIGH-to-LOW transition of LE. A HIGH on OE causes the outputs to assume a high-impedance OFF-state. Operation of the OE input does not affect the state of the latches. 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 to 6.0 V
CMOS low power dissipation
High noise immunity
Input levels:
- For 74HC573: CMOS level
- For 74HCT573: TTL level
Inputs and outputs on opposite sides of package allowing easy interface with microprocessors
Useful as input or output port for microprocessors and microcomputers
3-state non-inverting outputs for bus-oriented applications
Common 3-state output enable input
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 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)	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
74HC573BQ	Production	2.0 - 6.0	CMOS	± 7.8	14	low	-40~125	79	9.4	50	DHVQFN20
74HC573D	Production	2.0 - 6.0	CMOS	± 7.8	14	low	-40~125	85	27.5	61	SO20
74HC573PW	Production	2.0 - 6.0	CMOS	± 7.8	14	low	-40~125	100	4.6	44.9	TSSOP20
74HCT573BQ	Production	4.5 - 5.5	TTL	± 6	17	low	-40~125	79	9.4	50	DHVQFN20
74HCT573D	Production	4.5 - 5.5	TTL	± 6	17	low	-40~125	85	27.5	61	SO20
74HCT573PW	Production	4.5 - 5.5	TTL	± 6	17	low	-40~125	100	4.6	44.9	TSSOP20

Package

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HC573BQ	DHVQFN20 (SOT764-1)	SOT764-1		SOT764-1_115	Active	HC573	74HC573BQ,115 ( 9352 736 94115 )
74HC573D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_653	Active	74HC573D	74HC573D,653 ( 9337 135 60653 )
74HC573PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_118	Active	HC573	74HC573PW,118 ( 9351 870 00118 )
74HCT573BQ	DHVQFN20 (SOT764-1)	SOT764-1		SOT764-1_115	Active	HCT573	74HCT573BQ,115 ( 9352 737 32115 )
74HCT573D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_653	Active	74HCT573D	74HCT573D,653 ( 9337 135 70653 )
74HCT573PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_118	Active	HCT573	74HCT573PW,118 ( 9351 869 90118 )

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))
74HC573D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_652	Withdrawn / End-of-life	74HC573D	74HC573D,652 ( 9337 135 60652 )
74HC573PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_112	Withdrawn / End-of-life	HC573	74HC573PW,112 ( 9351 870 00112 )
74HCT573D	SO20 (SOT163-1)	SOT163-1	WAVE_BG-BD-1	SOT163-1_652	Withdrawn / End-of-life	74HCT573D	74HCT573D,652 ( 9337 135 70652 )
74HCT573PW	TSSOP20 (SOT360-1)	SOT360-1	SSOP-TSSOP-VSO-WAVE	SOT360-1_112	Withdrawn / End-of-life	HCT573	74HCT573PW,112 ( 9351 869 90112 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product
74HC573BQ/S520	935306251115
74HC573D	933713560652	2021-12-31	2022-06-30	74HC573D
74HC573PW	935187000112	2021-12-31	2022-06-30	74HC573PW
74HCT573D	933713570652	2021-12-31	2022-06-30	74HCT573D
74HCT573PW	935186990112	2021-12-31	2022-06-30	74HCT573PW

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74HC573BQ	74HC573BQ,115	74HC573BQ	Always Pb-free
74HC573D	74HC573D,653	74HC573D	week 13, 2005
74HC573PW	74HC573PW,118	74HC573PW	week 7, 2005
74HCT573BQ	74HCT573BQ,115	74HCT573BQ	Always Pb-free
74HCT573D	74HCT573D,653	74HCT573D	week 13, 2005
74HCT573PW	74HCT573PW,118	74HCT573PW	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
74HC573D	74HC573D,652	74HC573D	week 13, 2005
74HC573PW	74HC573PW,112	74HC573PW	week 7, 2005
74HCT573D	74HCT573D,652	74HCT573D	week 13, 2005
74HCT573PW	74HCT573PW,112	74HCT573PW	week 7, 2005

Quality and reliability disclaimer

Documentation (10)

File name	Title	Type	Date
74HC_HCT573	Octal D-type transparent latch; 3-state	Data sheet	2021-09-10
AN11044	Pin FMEA 74HC/74HCT family	Application note	2019-01-09
hc573	74HC573 IBIS model	IBIS model	2020-12-07
hct573	74HCT573 IBIS model	IBIS model	2020-12-08
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
hc573	74HC573 IBIS model	IBIS model	2020-12-07
hct573	74HCT573 IBIS model	IBIS model	2020-12-08

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