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HomeProductsIntegrated Circuits (ICs)Logic - Shift Registers74HCT595BQ
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74HCT595BQ - Nexperia USA Inc.

Manufacturer Part Number
74HCT595BQ
Manufacturer
Nexperia
Allelco Part Number
32D-74HCT595BQ
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
16,390 pcs available, New & Original
Parts Description
SERIAL IN PARALLEL OUT, HCT SERI
Package
16-DHVQFN (2.5x3.5)
Data sheet
-
RoHs Status
 
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Our certification
In stock: 16390
  • Unit Price: $0.187
  • Subtotal: $0.00

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Add to Cart and Submit RFQ now, we'll contact you immediately.

Quantity Unit Price Ext. Price
5+ $0.187 $0.94
50+ $0.152 $7.60
150+ $0.137 $20.55
500+ $0.113 $56.50
3000+ $0.105 $315.00
6000+ $0.10 $600.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

74HCT595BQ Tech Specifications
Nexperia USA Inc. - 74HCT595BQ technical specifications, attributes, parameters and parts with similar specifications to Nexperia USA Inc. - 74HCT595BQ

Product Attribute Attribute Value
Manufacturer Nexperia
Voltage - Supply 4.5V ~ 5.5V
Supplier Device Package 16-DHVQFN (2.5x3.5)
Series 74HCT
Package / Case 16-VFQFN Exposed Pad
Package Bulk
Output Type Tri-State
Product Attribute Attribute Value
Operating Temperature -40°C ~ 125°C
Number of Elements 1
Number of Bits per Element 8
Mounting Type Surface Mount
Logic Type Shift Register
Function Serial to Parallel, Serial
Base Product Number 74HCT595

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
HTSUS 0000.00.0000

Parts Introduction

74HCT595BQ Image
74HCT595BQ (1)

Manufacturer Part Number

74HCT595BQ

Manufacturer

Nexperia

Introduction

8-bit serial-in, parallel-out shift register with 3-state outputs

Ideal for driving LED and LCD displays, driving relays, and other parallel output applications

Product Features and Performance

High-speed operation

Low power consumption

High noise immunity

3-state outputs

Wide supply voltage range (4.5V to 5.5V)

Wide operating temperature range (-40°C to 125°C)

Product Advantages

Compact 16-DHVQFN (2.5x3.5) package

Suitable for surface mount applications

Reliable performance in various operating conditions

74HCT595BQ Image
74HCT595BQ (2)

Key Technical Parameters

Logic Type: Shift Register

Number of Bits per Element: 8

Number of Elements: 1

Output Type: Tri-State

Mounting Type: Surface Mount

Supply Voltage: 4.5V to 5.5V

Quality and Safety Features

Robust design for reliable operation

Compliant with industry standards for quality and safety

Compatibility

Compatible with various electronic systems and applications

Application Areas

Driving LED and LCD displays

Driving relays and parallel output devices

Industrial control systems

Automation and control equipment

Product Lifecycle

This product is currently in production and available for purchase

There are no known plans for discontinuation or replacement at this time

Key Reasons to Choose This Product

High-performance 8-bit shift register with 3-state outputs

Compact and space-saving package

Wide operating temperature range for diverse applications

Reliable and robust design for long-term use

Compatibility with various electronic systems and applications

Frequently Asked Questions(FAQ)

How does the 74HCT595BQ compare to other shift registers in terms of power consumption when operating at 5V and driving a common-anode LED array with 20mA per output?
The 74HCT595BQ, part of the HCT family, draws approximately 1.2mA typical static current from VCC when all outputs are low and no clocking occurs. In contrast, standard TTL-based shift registers like the 74LS595 consume about 3–4mA under similar conditions due to higher input leakage and output drive characteristics. When driving a 5V common-anode LED array requiring 20mA per segment, the HCT’s CMOS-compatible inputs reduce unnecessary loading on the data line, resulting in cleaner signal integrity and lower total system power compared to LS variants. However, it still requires external current-limiting resistors for each LED to avoid exceeding the maximum output sink current of 6mA per pin.
What are the key timing constraints for cascading multiple 74HCT595BQ devices in a high-speed serial chain without compromising data reliability?
For reliable operation up to 25 MHz (per Nexperia’s characterization), the propagation delay through the 74HCT595BQ is typically 9 ns, and the setup time for the storage register is 18 ns. When cascading three or more units, cumulative skew can exceed acceptable margins unless careful attention is paid to clock distribution. It's recommended to limit the chain length to four devices or implement a buffered clock signal to maintain synchronization. Additionally, the hold time requirement is only 5 ns, which helps mitigate metastability risks, but overall system timing budgets must account for inter-device delays to prevent race conditions during parallel load operations.
Can the 74HCT595BQ directly interface with 3.3V logic levels, and what level-shifting considerations apply if used alongside an MCU running at 3.3V?
Yes, the 74HCT595BQ accepts valid logic high inputs down to 2.0V, making it fully compatible with 3.3V CMOS and TTL signals. This backward compatibility allows direct connection to a 3.3V microcontroller such as an STM32 or ESP32 without additional circuitry. However, while the input thresholds support 3.3V logic, the device itself operates at 4.5–5.5V, so the supply voltage must remain within that range. Outputs will swing between ground and VCC (typically 5V), so ensure downstream components can tolerate 5V logic highs if interfacing back to 3.3V systems—though this is generally not an issue due to noise margins.
What is the maximum number of 74HCT595BQ chips that can be safely powered from a single 7.5W linear regulator assuming worst-case continuous operation at 5V?
At 5V supply, each 74HCT595BQ consumes around 3.5 mA when all outputs are actively switching. Assuming worst-case dynamic current of 10 mA per chip and accounting for quiescent current, a conservative estimate is 12 mA per device. Powering ten chips would require 120 mA, which corresponds to 600 mW dissipated by the regulator—well within the thermal limits of most small regulators rated for 7.5W. Therefore, up to 625 devices could theoretically be supported, though practical designs should include derating for efficiency, transient loads, and PCB trace resistance. A better approach uses distributed decoupling and separate regulators for dense layouts.
How does the DHVQFN-16 package of the 74HCT595BQ affect thermal performance during continuous high-current sinking operations compared to SOIC-16?
The DHVQFN-16 (2.5x3.5 mm) offers superior thermal conductivity due to its exposed thermal pad, enabling heat dissipation through the PCB. In contrast, SOIC-16 relies solely on convection and conduction along leads, leading to higher junction temperatures under sustained loads. During continuous sinking of 20mA per output across all eight bits, the DHVQFN-16 maintains junction temperatures below 70°C at ambient 25°C with proper solder-down thermal vias. The same conditions in SOIC-16 may push junctions above 90°C, approaching the 125°C absolute maximum. Thus, the QFN package improves reliability in compact, thermally constrained applications.
Is it safe to use the 74HCT595BQ in automotive-grade temperature environments, and what derating factors should be applied for long-term operation?
The 74HCT595BQ is specified for industrial temperature ranges (-40°C to +125°C), which aligns with automotive-grade expectations, though formal AEC-Q100 qualification may not be documented by Nexperia for this part. Operation at full temperature extremes reduces mean-time-between-failures due to increased electromigration and gate oxide stress. For critical automotive subsystems, consider derating current by 20% and limiting continuous switching activity. Additionally, ensure robust ESD protection (>2 kV HBM) at board edges, as human-body model sensitivity increases at elevated temperatures. While functionally suitable, certification requirements should be verified per application standard.
What happens if OE (output enable) is left floating on the 74HCT595BQ, and how does this impact noise susceptibility in unshielded environments?
Leaving the OE pin floating results in undefined output states because CMOS inputs exhibit high impedance and pick up noise. In practice, OE may oscillate near threshold voltages, causing intermittent data corruption or excessive power dissipation. To ensure predictable behavior, OE must be tied either to VCC (outputs enabled) or GND (outputs tri-stated). In noisy environments, pulling OE low via a pull-down resistor minimizes risk of accidental activation during power-up transients. This precaution also reduces electromagnetic emissions by preventing unintended output transitions.
How many 74HCT595BQ devices are needed to drive a 64-segment multiplexed LED display using row-column scanning, and what are the implications for refresh rate?
Each 74HCT595BQ provides eight open-drain outputs capable of sinking current for LED segments. To control 64 segments, six chips are required (6 × 8 = 48) with additional decoding logic for the remaining 16—or alternatively, use two chips to drive column lines and two more for rows in a matrix configuration. With six chips cascaded serially, the serial clock runs continuously, but effective refresh rate depends on multiplexing frequency. For a 60 Hz visible flicker-free display, each segment must be lit for at least 1.5 ms every cycle. At 25 MHz clock speed, shifting 48 bits takes 1.92 µs, so timing is not a bottleneck, but GPIO overhead from the controlling MCU becomes significant.

Parts with Similar Specifications

The three parts on the right have similar specifications to Nexperia USA Inc. 74HCT595BQ

Product Attribute 74HCT595BQ,115 74HCT595BQ-Q100,11 74HCT595D-Q100,118 74HCT594DB,118
Part Number 74HCT595BQ,115 74HCT595BQ-Q100,11 74HCT595D-Q100,118 74HCT594DB,118
Manufacturer Nexperia USA Inc. Nexperia USA Inc. Nexperia USA Inc. NXP USA Inc.
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -
Number of Elements - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Base Product Number - DAC34H84 MAX500 ADS62P42
Logic Type - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Function - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Number of Bits per Element - - - -
Voltage - Supply - - - -
Mounting Type - Surface Mount Through Hole Surface Mount

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Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
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Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
  • HKBea
  • Paypal
  • MasterCard
  • Western-Union
  • VISA
Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner
  • Efficient Supply Management
  • Cost-Saving Procurement
  • Fast Sourcing & Delivery
Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
74HCT595BQ Image

74HCT595BQ

Nexperia USA Inc.
32D-74HCT595BQ

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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