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Home > Products > Integrated Circuits (ICs) > Logic > Shift Registers

Nexperia USA Inc. 74HC299D-Q100J

Name: 74HC299D-Q100J
Brand: Nexperia USA Inc.
SKU: 74HC299D-Q100J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HC299D-Q100J

Manufacturer:: Nexperia USA Inc.

Category:: Shift Registers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: 74HC299D-Q100J.pdf

Description:: 74HC299D-Q100/SOT163/SO20

Quantity:: RFQ Add To RFQ list

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Inventory:1,995

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Product details

Overview

74HC299D-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified 8-bit universal shift register with 3-state I/O buffers, supporting synchronous shift-left, shift-right, parallel load, and hold operations via mode-select inputs S0/S1. It features asynchronous master reset (MR), dual 3-state output enables (OE1/OE2), and operates across -40 °C to +125 °C for automotive body control modules requiring bus-compatible data serialization and parallel interface consolidation.

For engineers reviewing the 74HC299D-Q100 datasheet, 74HC299D-Q100 pinout, 74HC299D-Q100 application, or 74HC299D-Q100 equivalent, key selection criteria include its 20-pin SO20 package, 3-state bidirectional I/O capability, cascading support via Q0/DSR and Q7/DSL pins, and guaranteed operation at VCC = 2.0–6.0 V with propagation delays as low as 19 ns at 6 V.

Technical Context

This device implements eight edge-triggered D-type flip-flops with integrated multiplexing logic to route data between serial (DSR/DSL/Q0/Q7) and parallel (I/O0–I/O7) paths under control of S0/S1. All state transitions-except asynchronous MR-are synchronized to the rising edge of CP, with setup/hold times validated down to 11 ns (t_su) and 0 ns (t_h) at VCC = 6.0 V.

The 3-state outputs are independently disabled by either OE1 or OE2 (active LOW), or collectively by asserting both S0 and S1 HIGH during parallel load preparation. Clamp diodes on all inputs permit interfacing to voltages exceeding VCC when used with current-limiting resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Function	8-bit universal shift register with 3-state bidirectional I/O ports
Supply Voltage Range	2.0 V to 6.0 V - supports legacy 5 V and modern low-voltage automotive domains
Operating Temperature	-40 °C to +125 °C - qualified per AEC-Q100 Grade 1 for under-hood applications
Propagation Delay (CP to Q0/Q7)	19 ns min / 51 ns max at VCC = 6.0 V - enables >20 MHz clock rates in serial shift mode
Output Drive	±35 mA bus driver outputs - directly drives PCB traces or standard CMOS loads without external buffers
ESD Protection	HBM >2000 V, CDM >1000 V - meets automotive ESD robustness requirements per JS-001/JS-002
Input Clamping	Integrated clamp diodes - allows safe interface to signals up to VCC + 0.5 V using series resistors

Pinout & Package

Package: SO20 (SOT163-1), plastic small outline, 20-pin, 7.5 mm body width, surface-mount.

Pin/Terminal	Circuit Role	Design Meaning
1, 19 (S0, S1)	Mode select input	Determines operation: L/L = hold, H/L = shift left, L/H = shift right, H/H = parallel load
2, 3 (OE1, OE2)	3-state output enable	Active LOW; disables I/O0–I/O7 outputs into high-impedance state while preserving internal register state
4–7, 13–16 (I/O0–I/O7)	Bidirectional data port	Parallel data input during load mode; 3-state output during shift/hold modes; shared bus interface point
8, 17 (Q0, Q7)	Serial output	Q0 = LSB output during right-shift; Q7 = MSB output during left-shift; used for daisy-chaining
9 (MR)	Asynchronous master reset	Active LOW; forces all flip-flops to 0 regardless of CP or mode state
10 (GND)	Ground reference	0 V return path for all internal logic and output drivers
11 (DSR)	Shift-right serial input	Data enters LSB position (Q0) on next CP rising edge when S1=H, S0=L
12 (CP)	Clock input	Rising-edge triggered; synchronizes all register updates and mode transitions
14 (DSL)	Shift-left serial input	Data enters MSB position (Q7) on next CP rising edge when S1=L, S0=H
20 (VCC)	Positive supply	Primary power rail; powers logic core and output drivers; decoupling required per layout guidelines

Key Features

Feature	Design Value
Four-mode operation	Single-device replacement for discrete shift/hold/load functions - reduces board area and interconnect complexity
3-state bidirectional I/O	I/O0–I/O7 serve as both inputs and outputs without external direction control logic
Cascadable architecture	Q0 and Q7 provide seamless n-bit expansion - e.g., two devices form a 16-bit register with one CP line
AEC-Q100 Grade 1 qualification	Validated for automotive use including engine control units, lighting controllers, and gateway ECUs
Clamp diode inputs	Enables direct connection to 12 V-sourced sensors or LIN transceivers using simple current-limiting resistors

Applications

Automotive Body Control Unit

Industrial PLC I/O Expansion

Use Scenario: Consolidating door lock, window lift, and mirror position sensor inputs into a single microcontroller interface.

IC Role / Device Role / Timing Role: Parallel-to-serial converter feeding CAN/LIN microcontroller with time-aligned status bytes.

Use Value: Reduces MCU GPIO count by 8 pins per device; eliminates need for separate latches or level translators due to 6 V-tolerant inputs.

Use Scenario: Adding 8-channel digital input/output capability to a modular PLC base unit via ribbon cable backplane.

IC Role / Device Role / Timing Role: Bus-isolated I/O expander with local storage, synchronized to main controller's clock domain.

Use Value: Enables hot-swappable I/O modules with deterministic 51 ns worst-case latency between CP edge and output update.

Automotive Lighting Controller

Automotive Gateway Diagnostic Interface

Use Scenario: Driving LED strings and reading feedback from photodiodes or thermal sensors in headlamp assemblies.

IC Role / Device Role / Timing Role: Bidirectional data serializer managing PWM dimming commands and fault reporting over shared trace pairs.

Use Value: Eliminates separate TX/RX transceivers; 3-state outputs prevent bus contention during diagnostic readback cycles.

Use Scenario: Interfacing UDS diagnostic services between high-speed CAN FD and legacy K-line or UART peripherals.

IC Role / Device Role / Timing Role: Protocol-agnostic bit-level data shifter buffering diagnostic request/response payloads.

Use Value: Supports variable-length message framing (e.g., ISO 14230) without firmware overhead; MR pin enables hard reset during communication loss.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit universal shift register applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HC299DR	Non-automotive grade; rated only to +85 °C; identical pinout and logic function	Lacks AEC-Q100 qualification; unsuitable for under-hood or safety-critical zones	Select when operating ambient ≤85 °C and automotive qualification is not required
74LV299PW,118	Lower voltage range (1.0–3.6 V); 20-pin TSSOP; 3.3 V optimized timing (t_pd = 14 ns @ 3.3 V)	Designed for battery-powered infotainment subsystems; incompatible with 5 V buses	Select for 3.3 V-only systems where lower power and faster 3.3 V performance outweigh 5 V compatibility needs

Compared with SN74HC299DR and 74LV299PW,118, the 74HC299D-Q100 uniquely delivers full automotive temperature range, AEC-Q100 compliance, and 2–6 V interoperability - making it the sole choice for mixed-voltage, high-reliability vehicle networks.

Availability

74HC299D-Q100 is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC I/O expansion modules, and automotive lighting controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC299D-Q100 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 essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HC299-Q100 belongs to Nexperia's automotive-qualified HC logic family, engineered specifically for robust serial/parallel data handling in harsh environments where reliability, signal integrity, and long-term supply stability are mandatory.

FAQ

What is the maximum clock frequency supported by the 74HC299D-Q100?

The 74HC299D-Q100 supports a maximum clock frequency of 20 MHz at VCC = 6.0 V and CL = 15 pF, with typical f_max reaching 54 MHz under ideal conditions. This is derived from the minimum CP pulse width (14 ns) and guaranteed t_pd (19 ns), enabling reliable operation in high-speed serial data paths within automotive domain controllers.

Can the I/O0–I/O7 pins be used simultaneously as inputs and outputs?

No - I/O0–I/O7 operate in time-multiplexed mode: they function as inputs only during parallel load (S0=S1=H), and as 3-state outputs during shift or hold operations. Simultaneous bidirectional use on the same pin is not supported; however, different pins may be assigned to input vs. output roles within the same 8-bit word via external routing.

How does the asynchronous master reset (MR) interact with the 3-state outputs?

Asserting MR LOW resets all internal flip-flops to 0 but does not affect the 3-state output enable state - outputs remain in their prior high-impedance or driven condition. To ensure defined bus states after reset, OE1/OE2 must be actively controlled (e.g., held HIGH) independent of MR assertion.

Is the 74HC299D-Q100 compatible with 5 V TTL logic levels?

Yes - its CMOS inputs accept TTL-compatible thresholds (VIH ≥ 2.0 V at VCC = 5 V), and its outputs drive to VOH ≥ 4.4 V and VOL ≤ 0.15 V at IO = ±4 mA, satisfying 5 V TTL fan-out and noise margin requirements. The device is fully interoperable with legacy 5 V systems without level-shifting circuitry.

74HC299D-Q100J Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Shift Register

Output Type:: Tri-State

Number of Elements:: 1

Number of Bits per Element:: 8

Function:: Universal

Voltage - Supply:: 5V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SO

74HC299D-Q100J FAQ

1.How can I place an order for 74HC299D-Q100J through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HC299D-Q100J 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 74HC299D-Q100J reliable?

The price and inventory of 74HC299D-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC299D-Q100J is usually 5 days.

3.What payment methods are accepted for 74HC299D-Q100J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC299D-Q100J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HC299D-Q100J?

74HC299D-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HC299D-Q100J 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 74HC299D-Q100J?

For technical support, including 74HC299D-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC299D-Q100J requirements.

6.How does Aetrix verify that 74HC299D-Q100J is sourced from the original manufacturer or authorized distributors?

All 74HC299D-Q100J 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 74HC299D-Q100J meets industry standards.

7.What is the process for return or replacement of 74HC299D-Q100J?

All 74HC299D-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74HC299D-Q100J, 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 74HC299D-Q100J part is unused and in its original packaging.

Return procedure for 74HC299D-Q100J:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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