74HC594; 74HCT594

8-bit shift register with output register

The 74HC594; 74HCT594 is an 8-bit serial-in/serial or parallel-out shift register with a storage register. Separate clock and reset inputs are provided on both shift and storage registers. The device features a serial input (DS) and a serial output (Q7S) to enable cascading. Data is shifted on the LOW-to-HIGH transitions of the SHCP input, and the data in the shift register is transferred to the storage register on a LOW-to-HIGH transition of the STCP input. If both clocks are connected together, the shift register will always be one clock pulse ahead of the storage register. A LOW level on one of the two register reset pins (SHR and STR) will clear the corresponding register. 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

Synchronous serial input and output
8-bit parallel output
Shift and storage registers have independent direct clear and clocks
Independent clocks for shift and storage registers
100 MHz (typical)
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
Input levels:
- For 74HC594: CMOS level
- For 74HCT594: TTL level
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
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Applications

Serial-to parallel data conversion
Remote control holding register

Parametrics

Type number	Product status	V_CC (V)	Logic switching levels	Output drive capability (mA)	t_pd (ns)	f_max (MHz)	Nr of bits	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
74HC594BQ	Production	2.0 - 6.0	CMOS	± 7.8	14	109	8	low	-40~125	86	9.0	54	DHVQFN16
74HC594D	Production	2.0 - 6.0	CMOS	± 7.8	14	109	8	low	-40~125	86	6.9	45	SO16
74HC594PW	Production	2.0 - 6.0	CMOS	± 7.8	14	109	8	low	-40~125	119	3.0	47	TSSOP16
74HCT594D	Production	4.5 - 5.5	TTL	± 6	15	100	8	low	-40~125	86	6.9	45.1	SO16
74HCT594PW	Production	4.5 - 5.5	TTL	± 6	15	100	8	low	-40~125	119	3.0	47	TSSOP16

Package

Type number	Package	Package information	Reflow-/Wave soldering	Packing	Status	Marking	Orderable part number, (Ordering code (12NC))
74HC594BQ	DHVQFN16 (SOT763-1)	SOT763-1		SOT763-1_115	Active	4HC594	74HC594BQX ( 9356 912 76115 )
74HC594D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_118	Active	74HC594D	74HC594D,118 ( 9350 433 80118 )
74HC594PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_118	Active	HC594PW	74HC594PWJ ( 9356 912 21118 )
74HCT594D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_118	Active	74HCT594D	74HCT594D,118 ( 9350 433 90118 )
74HCT594PW	TSSOP16 (SOT403-1)	SOT403-1	SSOP-TSSOP-VSO-WAVE	SOT403-1_118	Active	4HCT594	74HCT594PWJ ( 9356 912 14118 )

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))
74HC594D	SO16 (SOT109-1)	SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE	SOT109-1_112	Withdrawn / End-of-life	74HC594D	74HC594D,112 ( 9350 433 80112 )

Discontinuation information

Type number	Orderable part number, (Ordering code (12NC))	Last time buy date	Last time delivery date	Replacement product	Status	Comments
74HC594D	935043380112	2021-12-31	2022-06-30	74HC594D
74HCT594D	935043390112	2021-12-31	2022-06-30	74HCT594D

Environmental information

Type number	Orderable part number	Chemical content	Leadfree conversion date
74HC594BQ	74HC594BQX	74HC594BQ
74HC594D	74HC594D,118	74HC594D	week 30, 2004
74HC594PW	74HC594PWJ	74HC594PW
74HCT594D	74HCT594D,118	74HCT594D	week 6, 2004
74HCT594PW	74HCT594PWJ	74HCT594PW

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
74HC594D	74HC594D,112	74HC594D			week 30, 2004

Quality and reliability disclaimer

Documentation (11)

File name	Title	Type	Date
74HC_HCT594	8-bit shift register with output register	Data sheet	2024-03-19
AN11044	Pin FMEA 74HC/74HCT family	Application note	2019-01-09
hc594	74HC594 IBIS model	IBIS model	2021-02-02
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
hc594	74HC594 IBIS model	IBIS model	2021-02-02

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