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Nexperia USA Inc. 74HC74BQ,115
- Part No.:
- 74HC74BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Flip Flops
- Package:
- 14-VFQFN Exposed Pad
- Datasheet:
-
74HC74BQ,115.pdf
- Description:
- IC FF D-TYPE DUAL 1BIT 14DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:24,419
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Product details
Overview
74HC74BQ,115 from Nexperia is a dual positive-edge-triggered D-type flip-flop with independent asynchronous set (nSD) and reset (nRD) inputs, complementary Q and Q̅ outputs per section, 2.0–6.0 V supply range, and DHVQFN14 (SOT762-1) package rated for -40 °C to +125 °C operation. It stores data on LOW-to-HIGH clock transitions with 14 ns typical propagation delay at VCC = 6.0 V and supports robust interfacing via input clamp diodes.
For engineers reviewing the 74HC74BQ,115 datasheet, 74HC74BQ,115 pinout, 74HC74BQ,115 application, or 74HC74BQ,115 equivalent, this device serves as a foundational building block in synchronous logic design-particularly where low-power, rail-to-rail CMOS-compatible edge-triggered storage with independent async controls is required in space-constrained industrial control, serial interface state machines, or clock-domain synchronization circuits.
Technical Context
The 74HC74BQ implements two identical, electrically isolated D-type flip-flops sharing no internal coupling-each with dedicated nD, nCP, nSD, nRD, nQ, and nQ̅ terminals. Its Schmitt-trigger clock input ensures reliable triggering even with slow-rising clock edges, while input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Functionally, it operates strictly on the LOW-to-HIGH transition of nCP; data at nD meeting setup (13 ns min at VCC = 6.0 V) and hold (3 ns min) timing is latched into the master-slave register and appears at nQ after tpd. Asynchronous nSD and nRD override clock action, forcing nQ HIGH or LOW respectively when asserted LOW, with recovery time of 7 ns minimum before next valid clock edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74HC high-speed CMOS - TTL-input compatible only in HCT variant; this part is HC, requiring CMOS-level inputs (VIH ≥ 3.15 V at VCC = 4.5 V). |
| Supply Voltage Range | 2.0 V to 6.0 V - Enables direct integration with 3.3 V and 5 V systems without level translation. |
| Propagation Delay (tpd) | 14 ns typical (VCC = 6.0 V, CL = 50 pF) - Supports >24 MHz maximum clock frequency in worst-case industrial temp range. |
| Input Clamp Diodes | Integrated - Permits safe connection of nD/nCP/nSD/nRD to signals up to VCC + 0.5 V using external series resistors. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood automotive ancillary logic and industrial motor drive control panels. |
| Package Thermal Resistance | 9.6 mW/K derating above 98 °C (SOT762-1) - Sustains 500 mW total power dissipation at Tamb ≤ 98 °C with adequate PCB copper area. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - Reduces susceptibility to handling damage during automated assembly and field service. |
Pinout & Package
DHVQFN14 (SOT762-1) package: leadless, 2.5 × 3.0 × 0.85 mm body, 0.5 mm pitch, exposed thermal pad (non-electrical, optional GND connection), 14 terminals, pin 1 index marked by corner cut.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1RD | Asynchronous reset for Flip-Flop 1 - Active LOW; forces 1Q = LOW regardless of clock or data state. |
| 2 | VCC | Positive supply - Must be decoupled locally (e.g., 100 nF ceramic) due to fast switching transients. |
| 3 | 1D | Data input for Flip-Flop 1 - Sampled on rising edge of 1CP if setup/hold times met. |
| 4 | 2RD | Asynchronous reset for Flip-Flop 2 - Independent control; no cross-talk with Flip-Flop 1. |
| 5 | 1CP | Clock input for Flip-Flop 1 - Schmitt-triggered; accepts slow edges (≥83 ns/V rise/fall at VCC = 6.0 V). |
| 6 | 2D | Data input for Flip-Flop 2 - Electrically isolated; may operate at different data rates than Flip-Flop 1. |
| 7 | 1SD | Asynchronous set for Flip-Flop 1 - Active LOW; forces 1Q = HIGH independent of clock. |
| 8 | 2CP | Clock input for Flip-Flop 2 - Identical Schmitt characteristics to 1CP; enables dual-clock domain use. |
| 9 | 1Q | Inverted output of Flip-Flop 1 - Complementary to 1Q; usable as feedback or enable signal. |
| 10 | 2SD | Asynchronous set for Flip-Flop 2 - Fully independent; allows asymmetric initialization of both sections. |
| 11 | 1Q | True output of Flip-Flop 1 - Latched value of 1D sampled at last valid 1CP rising edge. |
| 12 | 2Q | True output of Flip-Flop 2 - Retains state across power cycles only if VCC remains stable (no non-volatile storage). |
| 13 | 2RD | Asynchronous reset for Flip-Flop 2 - Pin 4 and Pin 13 are functionally identical but assigned to separate flip-flops. |
| 14 | GND | Ground reference - Connect exposed thermal pad to PCB ground plane for optimal thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger clock input | Enables reliable operation with RC-generated clocks or noisy microcontroller GPIOs without external shaping circuitry. |
| Independent async controls per flip-flop | Allows selective reset/set of one section without disturbing the other-critical for multi-phase sequencers and fault-isolated logic. |
| CMOS-level input thresholds | VIH = 3.15 V (min) at VCC = 4.5 V ensures noise margin >1.1 V in 3.3 V systems when VCC = 3.3 V. |
| Low dynamic power dissipation | CPD = 24 pF - Limits switching current to <1.2 μA/MHz per input at 3.3 V, reducing system-level heat generation. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - Prevents destructive latch-up during transient overvoltage events on I/O pins. |
Applications
| Industrial PLC Input Debouncing | Serial Data Bit Synchronization |
|---|---|
Use Scenario: Eliminating mechanical contact bounce in 24 V DC sensor inputs routed through optocouplers to 3.3 V logic. IC Role / Device Role / Timing Role: Dual flip-flop acts as synchronized edge detector: first stage captures raw debounced signal, second stage aligns to system clock domain. Use Value: Achieves <100 ns metastability resolution window using internal async reset, eliminating need for external synchronizer chains. |
Use Scenario: Aligning asynchronous UART RX data bits to a local 16× oversampling clock in an FPGA-based protocol analyzer. IC Role / Device Role / Timing Role: Each flip-flop captures one bit edge (start/stop) with independent clock enables, feeding parallel load registers. Use Value: 14 ns tpd ensures <1.5 UI timing margin at 10 Mbps, enabling error-free sampling without additional delay calibration. |
| Motor Drive Enable Sequencing | LED Matrix Row Latching |
Use Scenario: Controlling six-phase IGBT gate drivers in a servo amplifier, where PWM enable must be staggered by 100 ns between phases. IC Role / Device Role / Timing Role: Two flip-flops generate phase-shifted enable pulses using cascaded clock division and async set/reset for startup alignment. Use Value: 7 ns recovery time (trec) permits sub-100 ns inter-phase delays without race conditions or shoot-through risk. |
Use Scenario: Holding row-select signals in a 16×32 passive-matrix LED display driven by SPI-shifted column data. IC Role / Device Role / Timing Role: One flip-flop latches row address; the other holds blanking interval control to prevent ghosting during column update. Use Value: Symmetrical output impedance (typ. 25 Ω) ensures uniform row turn-on timing across all 16 lines, eliminating brightness gradients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT74BQ,115 | TTL-compatible inputs (VIH = 2.0 V min), otherwise identical pinout, timing, and package. | Required when driving from legacy 5 V TTL logic or microcontrollers with weak high-drive capability. | Select when interfacing to 5 V CMOS or TTL sources lacking full rail-swing drive strength. |
| SN74LVC74APWR | Lower VCC range (1.65–3.6 V), 3.3 V only; 5.5 ns tpd at 3.3 V; different pinout (TSSOP-14). | Optimized for modern low-voltage FPGAs and ARM SoCs; not drop-in replaceable due to voltage and pin mismatch. | Choose for new 3.3 V designs prioritizing speed and lower static current (<1 μA ICC), accepting PCB redesign. |
Compared with 74HCT74BQ,115, the HC version offers higher noise immunity in mixed-voltage systems but requires stronger high-level drive; versus SN74LVC74APWR, it trades 9 ns slower tpd for universal 2–6 V operation and direct compatibility with legacy 5 V infrastructure.
Availability
74HC74BQ,115 is available at Aetrix Electronics and suitable for industrial automation controllers, motor drive safety monitors, and LED video wall timing modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC74BQ,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 focused on essential efficiency technologies, delivering high-performance, reliable standard products including logic, discrete, and MOSFET solutions.
The 74HC74BQ belongs to Nexperia's 74HC logic family-designed for general-purpose digital signal routing, storage, and synchronization in cost-sensitive, thermally demanding industrial and automotive-adjacent applications.
FAQ
Can 74HC74BQ,115 operate reliably at 2.0 V supply?
Yes. The device is fully specified down to 2.0 V: propagation delay is 220 ns max at -40 °C to +85 °C, VIH is 1.5 V min, and ICC remains below 40 μA. This enables battery-powered sensors and ultra-low-power wake-up logic where 3.3 V regulation is omitted.
Is the exposed thermal pad on the DHVQFN14 package electrically connected?
No. The exposed pad (pin 1 index area) has no internal electrical connection. It may be left floating, soldered to a non-connected copper pour, or tied to GND for thermal improvement-Nexperia explicitly states no mechanical or electrical requirement exists for soldering it.
What happens if both nSD and nRD are asserted LOW simultaneously?
The output enters a defined, metastable-free state: nQ = HIGH and nQ̅ = HIGH per the function table. This condition is not latched; releasing both inputs simultaneously returns the flip-flop to its prior state only if nCP remains stable during release-otherwise, next clock edge determines final state.
Does 74HC74BQ,115 support hot insertion?
No. The device lacks hot-swap protection circuitry. Applying VCC before GND or connecting live signals to inputs while unpowered risks exceeding absolute maximum ratings (e.g., VI > VCC + 0.5 V), potentially damaging clamp diodes or causing latch-up.
74HC74BQ,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
- Function:
- Set(Preset) and Reset
- Type:
- D-Type
- Output Type:
- Complementary
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Clock Frequency:
- 82 MHz
- Max Propagation Delay @ V, Max CL:
- 37ns @ 6V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 40 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DHVQFN (2.5x3)
74HC74BQ,115 FAQ
1.How can I place an order for 74HC74BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC74BQ,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 74HC74BQ,115 reliable?
The price and inventory of 74HC74BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC74BQ,115 is usually 5 days.
3.What payment methods are accepted for 74HC74BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC74BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC74BQ,115?
74HC74BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC74BQ,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 74HC74BQ,115?
For technical support, including 74HC74BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC74BQ,115 requirements.
6.How does Aetrix verify that 74HC74BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74HC74BQ,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 74HC74BQ,115 meets industry standards.
7.What is the process for return or replacement of 74HC74BQ,115?
All 74HC74BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC74BQ,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 74HC74BQ,115 part is unused and in its original packaging.
Return procedure for 74HC74BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC74BQ,115 Tags
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Texas Instruments
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74LVC1G74GT,115
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SN74LVC1G74DCUR
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SN74HC574DWR
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74LVC1G74DC,125
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