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Nexperia USA Inc. 74HC164BQ,115
- Part No.:
- 74HC164BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 14-VFQFN Exposed Pad
- Datasheet:
-
74HC164BQ,115.pdf
- Description:
- IC SHIFT REGISTER 8BIT DHVQFN14
- Quantity:
- Payment:
- Shipping:
Inventory:4,810
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Product details
Overview
74HC164BQ,115 from Nexperia is an 8-bit serial-in/parallel-out CMOS shift register with dual gated serial inputs (DSA and DSB), eight buffered parallel outputs (Q0–Q7), asynchronous master reset (MR), and edge-triggered clock (CP) operating on LOW-to-HIGH transitions. It supports 2.0 V to 6.0 V supply, delivers <29 ns propagation delay at 6.0 V, and operates across –40 °C to +125 °C - used in LED matrix drivers, GPIO expansion, and serial-to-parallel data conversion in industrial control panels.
For engineers reviewing the 74HC164BQ,115 datasheet, 74HC164BQ,115 pinout, 74HC164BQ,115 application, or 74HC164BQ,115 equivalent, key selection criteria include its dual-input gating logic, MR-active-Low reset behavior, DHVQFN14 thermal-enhanced package, and compatibility with both HC-level and TTL-level input variants (74HCT164BQ).
Technical Context
The device implements an 8-stage positive-edge-triggered shift register with synchronous serial data loading via two independently gated inputs: DSA and DSB function as mutual enables - one must be HIGH for the other to accept data. The master reset (MR) overrides all clock and data activity, forcing Q0–Q7 LOW asynchronously.
Its internal architecture comprises eight cascaded D-type flip-flops with common clock (CP) and reset (MR), where each stage's output feeds the next stage's D input. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HC high-speed CMOS - compatible with TTL input levels only in HCT variant; ensures low static power and high noise immunity. |
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V and 5 V systems without level translation. |
| Propagation Delay (tpd) | 12 ns (typ) at VCC = 6.0 V - supports reliable operation up to 24 MHz in 125 °C industrial environments. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives requiring extended thermal margin. |
| Input Clamp Diodes | Integrated - permits safe connection of inputs to signals > VCC when series current-limiting resistors are used. |
| ESD Protection | HBM >2000 V, CDM >1000 V - reduces risk of field failure during handling and PCB assembly. |
| Power Dissipation | Ptot = 500 mW (derates 9.6 mW/K above 98 °C) - sufficient headroom for continuous operation in thermally constrained DHVQFN14 layouts. |
Pinout & Package
DHVQFN14 (SOT762-1) package: 2.5 × 3.0 × 0.85 mm body, 14-terminal no-lead quad flat design with exposed thermal pad (non-soldered by default); optimized for high-density PCBs and improved thermal performance over SO14/TSSOP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DSA) | Serial Data Input A | Primary serial data input; enabled only when DSB = HIGH - used for data gating and bus arbitration. |
| 2 (DSB) | Serial Data Input B | Secondary serial data input; enabled only when DSA = HIGH - allows dual-source serial stream selection. |
| 3 (Q0) | Parallel Output 0 | LSB output of shift register; advances first on CP rising edge after valid data load. |
| 4 (Q1) | Parallel Output 1 | Second-stage output; provides timing-aligned bit-shifted data for cascaded register chains. |
| 5 (Q2) | Parallel Output 2 | Third-stage output; maintains deterministic 1-bit delay per stage relative to Q0. |
| 6 (Q3) | Parallel Output 3 | Fourth-stage output; used in 4-bit nibble-aligned interfaces such as 7-segment decoder control. |
| 10 (Q4) | Parallel Output 4 | Fifth-stage output; supports split-bus architectures where upper/lower nibbles drive separate peripherals. |
| 11 (Q5) | Parallel Output 5 | Sixth-stage output; critical for driving column lines in passive-matrix LED displays. |
| 12 (Q6) | Parallel Output 6 | Seventh-stage output; provides timing-stable signal for synchronous latch enable in multi-chip configurations. |
| 13 (Q7) | Parallel Output 7 | MSB output; used as carry-out or overflow flag in counter-expansion applications. |
| 7 (GND) | Ground Reference | 0 V reference plane; thermal pad (Pin 1 index area) is electrically isolated unless explicitly connected to GND. |
| 8 (CP) | Clock Input | Rising-edge-triggered; LOW-to-HIGH transition shifts data - requires clean edge with <20 ns rise time at 6 V. |
| 9 (MR) | Master Reset | Asynchronous active-LOW reset; forces all Q outputs LOW independent of CP or data state. |
| 14 (VCC) | Positive Supply | Primary power rail; decoupling capacitor (100 nF) required within 3 mm of this pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-gated serial inputs | DSA and DSB act as mutual enables - eliminates need for external AND logic to select between two serial sources. |
| Asynchronous master reset | MR clears all flip-flops immediately without waiting for clock edge - essential for fail-safe system initialization. |
| Wide voltage operation | 2.0 V to 6.0 V supply range - supports mixed-voltage designs and brown-out tolerant operation down to 2 V. |
| Thermally enhanced package | DHVQFN14 (SOT762-1) with 0.85 mm profile - achieves 9.6 mW/K thermal derating, enabling higher sustained clock rates in compact enclosures. |
| JEDEC-compliant I/O | Meets JESD8C (2.7–3.6 V) and JESD7A (2.0–6.0 V); latch-up immunity >100 mA - suitable for harsh industrial environments. |
Applications
| LED Matrix Driver | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving 8×8 monochrome LED display using SPI-controlled serial data stream. IC Role / Device Role / Timing Role: Converts SPI MOSI bitstream into parallel column activation signals synchronized to row-scanning clock. Use Value: Eliminates need for 8-bit parallel port on MCU; reduces PCB trace count by 7 lines versus direct GPIO mapping. | Use Scenario: Adding 8 general-purpose output pins to a resource-constrained ARM Cortex-M0+ microcontroller. IC Role / Device Role / Timing Role: Serially loaded shift register acting as output port extension, updated via UART or bit-banged GPIO. Use Value: Enables full 8-bit parallel output control with only 2 MCU pins (clock + data), preserving UART/SPI for primary comms. |
| Industrial PLC Output Module | Legacy Bus Interface Adapter |
Use Scenario: Isolating and buffering digital control signals from PLC CPU to 24 V DC output cards. IC Role / Device Role / Timing Role: Level-translated serial interface stage feeding optocoupler drivers; MR tied to system watchdog timeout. Use Value: Provides deterministic reset-on-failure behavior and noise-immune serial command reception in EMI-heavy factory floors. | Use Scenario: Adapting 8-bit parallel data from legacy ISA bus to modern microcontroller-based diagnostics tool. IC Role / Device Role / Timing Role: Parallel capture buffer that latches ISA data on address strobe edge, then shifts out via UART-compatible serial link. Use Value: Bridges 16-bit ISA cycles into byte-serial streams without FPGA or dedicated bus controller IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit serial-in/parallel-out shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT164BQ,115 | TTL-compatible inputs (VIH = 2.0 V min); identical pinout, timing, and package. | Required when driving from 5 V TTL logic or microcontrollers with weak pull-ups. | Select when interfacing legacy 5 V logic families; otherwise prefer HC version for lower input threshold and wider VCC margin. |
| SN74LV164APWR | TI LV family; 1.65–5.5 V operation; slightly slower tpd (32 ns @ 5 V); TSSOP14 package only. | Limited to ≤85 °C ambient; lacks DHVQFN thermal performance for high-density industrial boards. | Choose only if existing design uses TI ecosystem or requires LV logic family co-location; not drop-in due to thermal and temp rating gaps. |
Compared with 74HCT164BQ,115, the HC variant offers broader supply flexibility and lower input thresholds, while SN74LV164APWR trades thermal robustness and temperature range for TI-specific design continuity - neither matches the 74HC164BQ,115's combination of 125 °C rating, DHVQFN thermal efficiency, and 2.0 V minimum VCC.
Availability
74HC164BQ,115 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller GPIO expansion, and industrial PLC output modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC164BQ,115 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.
The 74HC164BQ,115 belongs to Nexperia's industry-standard 74HC logic family - engineered for robust serial-to-parallel data conversion in space-constrained, thermally demanding industrial and automotive-adjacent applications.
FAQ
What is the function of the dual serial inputs (DSA and DSB) on the 74HC164BQ,115?
DSA and DSB serve as mutually enabling serial data inputs: data enters only through the input whose companion is held HIGH. For example, if DSB = HIGH, data on DSA is shifted in on each CP rising edge; if DSA = HIGH, data on DSB is accepted instead. This eliminates external gating logic and supports flexible serial source selection in multi-peripheral systems.
Can the 74HC164BQ,115 operate reliably at 2.0 V supply voltage?
Yes - the 74HC164BQ,115 is fully specified from 2.0 V to 6.0 V. At 2.0 V, it guarantees VIH ≥ 1.5 V and VIL ≤ 0.5 V, with tpd ≤ 170 ns and fmax ≥ 625 kHz. This makes it suitable for battery-powered or ultra-low-power systems where supply rails dip near 2 V during brown-out conditions.
Is the exposed thermal pad on the DHVQFN14 package required to be soldered to ground?
No - the thermal pad (Pin 1 index area) has no electrical requirement and may remain unsoldered. If soldered, it must either float or connect directly to GND; connecting it to any other net risks short circuits or thermal stress. Its primary role is mechanical stability and heat conduction, not electrical grounding.
How does the master reset (MR) interact with ongoing clock activity?
MR is asynchronous and dominant: when pulled LOW, it forces Q0–Q7 immediately to LOW regardless of CP state, DSA/DSB levels, or current register contents. Clock edges and data inputs are ignored during MR assertion. Release of MR (to HIGH) does not reload data - the register remains cleared until new data is shifted in on subsequent CP edges.
74HC164BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 14-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Shift Register
- Output Type:
- Push-Pull
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Serial to Parallel
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DHVQFN (2.5x3)
74HC164BQ,115 FAQ
1.How can I place an order for 74HC164BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC164BQ,115 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74HC164BQ,115 reliable?
The price and inventory of 74HC164BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC164BQ,115 is usually 5 days.
3.What payment methods are accepted for 74HC164BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC164BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC164BQ,115?
74HC164BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC164BQ,115 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74HC164BQ,115?
For technical support, including 74HC164BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC164BQ,115 requirements.
6.How does Aetrix verify that 74HC164BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74HC164BQ,115 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74HC164BQ,115 meets industry standards.
7.What is the process for return or replacement of 74HC164BQ,115?
All 74HC164BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC164BQ,115, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74HC164BQ,115 part is unused and in its original packaging.
Return procedure for 74HC164BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC164BQ,115 Tags
-
SN74HC164DR
Texas Instruments
-
SN74HC595DR
Texas Instruments
-
74HC595PW,118
Nexperia USA Inc.
-
SN74HC165PWR
Texas Instruments
-
HEF4094BT,653
Nexperia USA Inc.
-
74HC595D,118
Nexperia USA Inc.
-
SN74HC595PWR
Texas Instruments
-
74HC165D,653
Nexperia USA Inc.
-
SN74LV165APWR
Texas Instruments
-
74HC595BQ,115
Nexperia USA Inc.
-
74HC165BQ,115
Nexperia USA Inc.
-
CD4094BPWR
Texas Instruments
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