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NXP Semiconductors 74AHCT164D,112
- Part No.:
- 74AHCT164D,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Shift Registers
- Package:
- -
- Datasheet:
-
74AHCT164D,112.pdf
- Description:
- IC 8BIT SHIFT REGISTER 14-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,140
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Product details
Overview
74AHCT164D,112 from Nexperia is an 8-bit serial-in/parallel-out shift register with dual active-HIGH data inputs (DSA and DSB), eight buffered parallel outputs (Q0–Q7), master reset (MR) active LOW, and edge-triggered clock (CP) on LOW-to-HIGH transitions. It operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C ambient, and features TTL-level input thresholds for direct compatibility with legacy logic systems. Used in LED matrix drivers and microcontroller GPIO expansion.
For engineers reviewing the 74AHCT164D,112 datasheet, 74AHCT164D,112 pinout, 74AHCT164D,112 application, or 74AHCT164D,112 equivalent, key selection factors include its dual-input data enable logic, guaranteed 11.5 ns max propagation delay at 5 V/50 pF, MR asynchronous clear behavior, SO14 package thermal derating profile, and TTL-compatible VIH/VIL thresholds - all critical for deterministic timing in synchronous digital control paths.
Technical Context
The device implements a synchronous 8-stage positive-edge-triggered shift register with asynchronous active-LOW master reset. Data entry is controlled by mutual enable logic: DSA acts as data path when DSB = HIGH, and vice versa - enabling flexible serial data routing without external gating.
Input thresholds are fixed at VIH = 2.0 V (min) and VIL = 0.8 V (max) across temperature and supply, ensuring robust noise margin against TTL-family sources. Output drive strength is specified at ±8 mA under 4.5–5.5 V, with VOL ≤ 0.55 V and VOH ≥ 3.70 V at full load, supporting direct interface to 5 V CMOS and TTL loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit serial-in/parallel-out shift register with dual data inputs and asynchronous reset |
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with 5 V TTL and mixed-voltage system rails |
| Propagation Delay (tpd) | Max 11.5 ns at VCC = 5 V, CL = 50 pF - enables reliable operation up to 65 MHz in high-speed control loops |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - guarantees direct interfacing with standard TTL outputs without level shifting |
| Output Drive | ±8 mA at VCC = 4.5–5.5 V - sufficient to directly drive LEDs or fan-out to ≥10 74-series inputs |
| Operating Temperature | -40 °C to +125 °C - qualified for industrial and under-hood automotive auxiliary modules |
| Reset Behavior | Asynchronous MR active LOW - clears all Q0–Q7 to LOW independently of clock or data state |
Pinout & Package
74AHCT164D,112 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, and gull-wing leads compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DSA) | Serial data input A | Primary serial data path; enabled only when DSB = HIGH - used for daisy-chained data injection |
| 2 (DSB) | Serial data input B | Secondary serial data path; enables DSA when HIGH - supports dual-source or gated serial input |
| 3 (Q0) | Parallel output 0 | LSB of shifted data; synchronized to CP edge; drives external logic or LED anode/cathode |
| 4 (Q1) | Parallel output 1 | Second bit output; identical electrical specs to Q0 - enables uniform load distribution across outputs |
| 5 (Q2) | Parallel output 2 | Third bit output; Schmitt-triggered input tolerance not applied to outputs - standard CMOS drive |
| 6 (Q3) | Parallel output 3 | Fourth bit output; no internal pull-up/down - requires external termination if left unconnected |
| 7 (GND) | Ground reference | 0 V return path for all internal logic and I/O; must be low-impedance to minimize ground bounce |
| 8 (CP) | Clock input | Positive-edge-triggered; LOW-to-HIGH transition advances shift register - minimum pulse width 5.0 ns |
| 9 (MR) | Master reset | Asynchronous active-LOW; forces Q0–Q7 = LOW regardless of CP or data state - no setup/hold required |
| 10 (Q4) | Parallel output 4 | Fifth bit output; electrically identical to Q0–Q3 - supports uniform timing across all 8 bits |
| 11 (Q5) | Parallel output 5 | Sixth bit output; same VOH/VOL specs as other outputs - ensures consistent logic levels in bus applications |
| 12 (Q6) | Parallel output 6 | Seventh bit output; no internal latch - output reflects current register state immediately after CP edge |
| 13 (Q7) | Parallel output 7 | MSB output; final stage of shift chain - used for overflow detection or feedback to DSA/DSB |
| 14 (VCC) | Supply voltage | +4.5 V to +5.5 V power rail; bypass capacitor (100 nF) required within 10 mm of pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent serial inputs | DSA and DSB provide hardware-selectable data paths - eliminates need for external multiplexers in multi-source systems |
| TTL-compatible input thresholds | VIH ≥ 2.0 V and VIL ≤ 0.8 V ensure direct connection to 74LS/74F outputs without level translation |
| Asynchronous master reset | MR asserts instantly across all 8 stages - enables deterministic initialization in safety-critical sequencing |
| High noise immunity | Input hysteresis and balanced propagation delays reduce susceptibility to EMI-induced glitches on CP or MR lines |
| Extended temperature range | Specified from -40 °C to +125 °C - validated for use in motor control enclosures and industrial PLC backplanes |
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: Shift register converts SPI MOSI bitstream into parallel column activation signals; CP synchronized to MCU SCK. Use Value: Eliminates need for 8 dedicated GPIO pins; MR allows blanking during frame updates to prevent ghosting. |
Use Scenario: Extending I/O count of an ARM Cortex-M0+ MCU with limited GPIO for sensor polling and actuator control. IC Role / Device Role / Timing Role: Serially loaded configuration data shifts out to control relays, status LEDs, and ADC channel selectors. Use Value: Enables single-SPI-peripheral expansion of 8 digital outputs with deterministic 11.5 ns timing margin. |
| Industrial Serial-to-Parallel Converter | Legacy Bus Interface Adapter |
Use Scenario: Converting RS-485-modulated serial commands into parallel control words for stepper motor driver ICs. IC Role / Device Role / Timing Role: Acts as protocol-agnostic parallel word builder; DSA/DSB allow command/data separation via external gate. Use Value: Supports real-time motion control with sub-microsecond latency between command receipt and parallel output assertion. |
Use Scenario: Interfacing vintage 8-bit microprocessor address/data bus to modern FPGA-based peripheral controller. IC Role / Device Role / Timing Role: Captures lower address byte during write cycle and presents it as parallel latch output for decode logic. Use Value: TTL-level compatibility ensures zero-delay handshake with 74LS bus transceivers and avoids signal integrity issues. |
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 |
|---|---|---|---|
| 74AHC164D,112 | CMOS-level inputs (VIH ≥ 3.85 V @ VCC = 5.5 V); wider 2.0–5.5 V supply range | Better suited for mixed-voltage systems with 3.3 V controllers driving 5 V peripherals | Select when interfacing with 3.3 V microcontrollers or requiring ultra-low ICC (< 4 μA typical) |
| SN74HC164N | Single D input (no DSB); wider 2.0–6.0 V supply; no overvoltage-tolerant inputs | Lacks dual-input flexibility and MR timing margin - less suitable for fault-tolerant designs | Choose only for cost-sensitive, single-source serial applications with no requirement for input enable logic |
Compared with 74AHC164D,112 and SN74HC164N, the 74AHCT164D,112 uniquely delivers TTL-level input compatibility without external biasing while retaining dual-data-path control - making it optimal for retrofitting legacy 5 V systems with modern microcontrollers.
Availability
74AHCT164D,112 is available at Aetrix Electronics and suitable for LED matrix drivers, microcontroller GPIO expansion, industrial serial-to-parallel conversion, and legacy bus interface adapters requiring stable component supply across extended temperature ranges.
Supply support for 74AHCT164D,112 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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and sustainability.
The 74AHCT164D,112 belongs to Nexperia's advanced logic family designed specifically for robust, low-power, mixed-voltage digital interfacing in industrial and automotive-adjacent applications.
FAQ
Can 74AHCT164D,112 operate reliably at 3.3 V supply?
No - the 74AHCT164D,112 is TTL-input-optimized and specified only for 4.5 V to 5.5 V operation. At 3.3 V, VIH = 2.0 V exceeds 60% of VCC, violating input threshold ratio requirements and risking metastability. Use 74AHC164D,112 instead for 3.3 V systems.
What is the maximum clock frequency supported with 50 pF load?
At VCC = 5.0 V and CL = 50 pF, the 74AHCT164D,112 supports up to 65 MHz (fmax = 65 MHz per Table 7), derived from tpd ≤ 11.5 ns and setup/hold timing margins. This assumes clean 5 V CMOS clock edges with < 5 ns rise/fall times.
How does the dual-input (DSA/DSB) logic function in practice?
DSA and DSB implement OR-enable logic: data enters through DSA only when DSB = HIGH, and through DSB only when DSA = HIGH. When both are LOW, no data shifts; when both are HIGH, the device latches the last valid input - enabling hardware-selectable serial sources without software arbitration.
Is the SO14 package RoHS-compliant and lead-free?
Yes - the 74AHCT164D,112 in SO14 (SOT108-1) packaging meets RoHS Directive 2011/65/EU and is lead-free, with matte tin (Sn) lead finish and halogen-free molding compound, verified per Nexperia's product compliance documentation dated March 2024.
74AHCT164D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- 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:
- -
74AHCT164D,112 FAQ
1.How can I place an order for 74AHCT164D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT164D,112 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 74AHCT164D,112 reliable?
The price and inventory of 74AHCT164D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT164D,112 is usually 5 days.
3.What payment methods are accepted for 74AHCT164D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT164D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT164D,112?
74AHCT164D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT164D,112 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 74AHCT164D,112?
For technical support, including 74AHCT164D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT164D,112 requirements.
6.How does Aetrix verify that 74AHCT164D,112 is sourced from the original manufacturer or authorized distributors?
All 74AHCT164D,112 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 74AHCT164D,112 meets industry standards.
7.What is the process for return or replacement of 74AHCT164D,112?
All 74AHCT164D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT164D,112, 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 74AHCT164D,112 part is unused and in its original packaging.
Return procedure for 74AHCT164D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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