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NXP Semiconductors 74HCT164D,652
- Part No.:
- 74HCT164D,652
- Manufacturer:
- NXP Semiconductors
- Category:
- Shift Registers
- Package:
- -
- Datasheet:
-
74HCT164D,652.pdf
- Description:
- NEXPERIA 74HCT164D - SERIAL IN P
- Quantity:
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Inventory:32,954
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Product details
Overview
74HCT164D,652 from Nexperia is an 8-bit serial-in/parallel-out CMOS shift register with TTL-compatible inputs, asynchronous master reset (active LOW), dual gated serial data inputs (DSA/DSB), and edge-triggered clock (LOW-to-HIGH). It operates from 4.5 V to 5.5 V across -40 °C to +125 °C and drives eight parallel outputs (Q0–Q7) for LED multiplexing, I/O expansion, and serial-to-parallel data conversion in industrial control systems.
For engineers reviewing the 74HCT164D,652 datasheet, 74HCT164D,652 pinout, 74HCT164D,652 application, or 74HCT164D,652 equivalent, this device is selected for deterministic timing-critical serial data latching, low-power logic-level translation between microcontrollers and peripheral arrays, and robust reset-driven state initialization in embedded digital subsystems.
Technical Context
The 74HCT164D,652 implements a synchronous 8-stage D-type flip-flop chain with gated serial input selection: either DSA or DSB can serve as active-HIGH enable for the other, enabling flexible data routing without external logic. Its asynchronous MR input forces all Q outputs LOW independently of CP or data inputs, ensuring fail-safe initialization.
Designed for TTL-level compatibility, it accepts VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 4.5–5.5 V, while delivering VOH ≥ 3.98 V (IO = −4.0 mA) and VOL ≤ 0.4 V (IO = 5.2 mA), supporting direct interfacing with legacy 5 V microcontrollers and discrete drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HCT - TTL-compatible input thresholds, CMOS output drive, 5 V operation |
| Function | 8-bit serial-in/parallel-out shift register with asynchronous master reset |
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across industrial 5 V rails with ±10 % tolerance |
| Propagation Delay | 17 ns (typ) CP-to-Qn at VCC = 4.5 V - enables reliable 27 MHz maximum clock frequency |
| Output Drive | ±4.0 mA (VOH/VOL) - sufficient to directly sink/source standard LEDs or drive CMOS/TTL fan-out |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor controllers |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - withstands handling and board-level electrostatic events |
Pinout & Package
74HCT164D,652 is housed in a plastic small outline package (SO14, SOT108-1) with 14 leads and 3.9 mm body width. Pin 1 is marked by a notch or dot; thermal pad is not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DSA) | Serial data input A | Primary serial data path; active when DSB = HIGH - used for daisy-chained data flow |
| 2 (DSB) | Serial data input B | Secondary serial data path; acts as enable for DSA when HIGH - supports dual-source selection |
| 3–6, 10–13 (Q0–Q7) | Parallel output terminals | Sequential bit outputs; Q0 shifts first, Q7 last - enables byte-aligned parallel readout |
| 7 (GND) | Ground reference | 0 V return path for all internal logic and output current - must be low-impedance |
| 8 (CP) | Clock input | Edge-triggered on LOW-to-HIGH transition - defines precise shift timing boundary |
| 9 (MR) | Master reset | Asynchronous active-LOW signal - clears all flip-flops regardless of CP or data state |
| 14 (VCC) | Positive supply | 5 V power rail - powers internal logic and output buffers; bypass capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Dual gated serial inputs | DSA and DSB allow hardware-selectable data source without external gates - reduces PCB real estate and routing complexity |
| Asynchronous master reset | MR forces Q0–Q7 LOW immediately, independent of clock - critical for system boot-up and fault recovery |
| TTL-compatible input levels | VIH ≥ 2.0 V, VIL ≤ 0.8 V at 5 V - ensures interoperability with legacy 5 V MCUs, FPGAs, and logic families |
| Wide temperature range | Specified from −40 °C to +125 °C - supports deployment in engine control units, power supplies, and factory automation |
| Low dynamic power | CPD = 40 pF - limits switching power dissipation to < 1 mW at 1 MHz, easing thermal design |
Applications
| LED Display Multiplexing | Microcontroller I/O Expansion |
|---|---|
|
Use Scenario: Driving 8-segment common-cathode LED displays using a single microcontroller GPIO pin for serial data and one for clock. IC Role / Device Role / Timing Role: Serial-to-parallel converter that latches incoming bitstream into Q0–Q7 outputs synchronized to CP edges, enabling static segment illumination per cycle. Use Value: Reduces required MCU pins from 8 to 2, eliminates software bit-banging overhead, and provides glitch-free output transitions via edge-triggered shift. |
Use Scenario: Adding 8 general-purpose output lines to an STM32F4 microcontroller with limited GPIO availability. IC Role / Device Role / Timing Role: Parallel output latch controlled by SPI MOSI and SCK signals - CP replaces SCK, DSA carries MOSI data, MR enables safe reset during reconfiguration. Use Value: Enables deterministic timing for driving relays, solenoids, or status indicators without CPU intervention after initial load. |
| Industrial Serial Data Buffering | Legacy System Interface Adapter |
|
Use Scenario: Converting RS-485 UART frames into parallel control words for PLC backplane registers. IC Role / Device Role / Timing Role: Shift register stage in a multi-device daisy chain - DSB enables cascading from upstream 74HCT164, MR synchronizes reset across all stages. Use Value: Provides galvanically isolated, noise-immune serial-to-parallel conversion with sub-20 ns propagation delay for deterministic control word alignment. |
Use Scenario: Interfacing a Z80 CPU's 8-bit data bus to a modern FPGA-based peripheral controller requiring parallel handshake signals. IC Role / Device Role / Timing Role: Level-shifting and timing-synchronized data capture element - accepts TTL-level Z80 writes and presents clean CMOS-level outputs to FPGA inputs. Use Value: Bridges 1980s-era TTL logic timing (e.g., 200 ns write pulse) to FPGA setup requirements via guaranteed 17 ns CP-to-Q delay and 12 ns minimum CP pulse width. |
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 |
|---|---|---|---|
| 74HC164D,653 | CMOS input thresholds (VIH ≥ 3.15 V @ VCC = 4.5 V); wider 2.0–6.0 V supply range | Requires higher input voltage for logic HIGH - unsuitable for direct connection to 3.3 V MCU outputs without level shifting | Select when operating below 4.5 V or interfacing with 3.3 V logic via buffer; avoid for pure 5 V TTL systems. |
| SN74LS164N | Bipolar TTL technology; 4.75–5.25 V only; higher ICC (19 mA typ); slower tpd (25 ns min) | Higher power consumption and lower noise immunity; lacks gated dual-input flexibility | Choose only for legacy LS-TTL board replacements where pinout and timing margins match original design. |
Compared with 74HC164D,653 and SN74LS164N, the 74HCT164D,652 uniquely balances TTL-level compatibility, 5 V industrial temperature range, and dual-input gating - making it optimal for new designs integrating microcontrollers with discrete output loads.
Availability
74HCT164D,652 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller I/O expansion, industrial serial buffering, and legacy system interface adapters requiring stable component supply and long-term production continuity.
Supply support for 74HCT164D,652 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HCT164 belongs to Nexperia's industry-standard 74-series logic family, engineered for drop-in replacement of legacy TTL devices while delivering CMOS efficiency, extended temperature operation, and robust ESD performance.
FAQ
What is the function of the DSA and DSB pins on the 74HCT164D,652?
The DSA (pin 1) and DSB (pin 2) are dual serial data inputs with gated functionality: when DSB is HIGH, data on DSA is shifted into the register on each CP rising edge; when DSA is HIGH, data on DSB is shifted instead. This allows hardware-selectable data source routing without external logic, simplifying daisy-chain configurations and reducing component count in multi-stage shift register designs.
Can the 74HCT164D,652 operate reliably at 3.3 V supply?
No - the 74HCT164D,652 is specified only for 4.5 V to 5.5 V operation. At 3.3 V, its TTL-compatible inputs (VIH ≥ 2.0 V) may misinterpret logic HIGH levels, and output drive (VOH ≥ 3.98 V) cannot be sustained. For 3.3 V systems, use the 74HC164D,653 variant (2.0–6.0 V, CMOS inputs) or add a level translator such as the TXB0108.
How does the master reset (MR) interact with the clock (CP) input?
The MR input (pin 9) is asynchronous and active LOW: asserting MR immediately forces Q0–Q7 to LOW regardless of CP state, data inputs, or clock edges. MR overrides all sequential logic - no clock pulse is needed for reset. Release of MR returns the device to normal operation, but the register remains cleared until new data is shifted in via DSA/DSB and CP.
Is the SO14 package (SOT108-1) of the 74HCT164D,652 RoHS compliant and lead-free?
Yes - the 74HCT164D,652 in SO14 (SOT108-1) packaging is RoHS-compliant and lead-free, meeting EU Directive 2011/65/EU and Nexperia's environmental specifications. The device carries the "LF" marking on the top-side marking and is qualified to JEDEC J-STD-020 moisture sensitivity level MSL3, with a floor life of 168 hours at ≤30 °C/60 % RH.
74HCT164D,652 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Function:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74HCT164D,652 FAQ
1.How can I place an order for 74HCT164D,652 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT164D,652 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 74HCT164D,652 reliable?
The price and inventory of 74HCT164D,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT164D,652 is usually 5 days.
3.What payment methods are accepted for 74HCT164D,652?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT164D,652 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT164D,652?
74HCT164D,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT164D,652 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 74HCT164D,652?
For technical support, including 74HCT164D,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT164D,652 requirements.
6.How does Aetrix verify that 74HCT164D,652 is sourced from the original manufacturer or authorized distributors?
All 74HCT164D,652 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 74HCT164D,652 meets industry standards.
7.What is the process for return or replacement of 74HCT164D,652?
All 74HCT164D,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT164D,652, 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 74HCT164D,652 part is unused and in its original packaging.
Return procedure for 74HCT164D,652:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT164D,652 Tags
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74HC165D,653
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SN74LV165APWR
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