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Nexperia USA Inc. 74HC373BQ,115
- Part No.:
- 74HC373BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Latches
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74HC373BQ,115.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,918
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Product details
Overview
74HC373BQ,115 from Nexperia is an octal D-type transparent latch with 3-state outputs, used for bus interface and data hold in microcontroller peripheral expansion, address/data multiplexing, and I/O port buffering. It operates from 2.0 V to 6.0 V, features active-HIGH latch enable (LE) and active-LOW output enable (OE), and is rated for -40 °C to +125 °C operation in DHVQFN20 package.
For engineers reviewing the 74HC373BQ,115 datasheet, 74HC373BQ,115 pinout, 74HC373BQ,115 application, or 74HC373BQ,115 equivalent, key selection criteria include propagation delay (12–45 ns at VCC = 4.5–6.0 V), 3-state output drive capability (±7.8 mA), input voltage compatibility (CMOS-level), thermal-enhanced QFN packaging, and latch transparency timing behavior under LE control.
Technical Context
This device implements eight independent D-type latches with shared LE and OE controls, enabling simultaneous capture and tri-state control of 8-bit parallel data paths. Its transparent mode allows real-time D-to-Q tracking while LE is HIGH; a HIGH-to-LOW LE transition latches the last stable input state.
The DHVQFN20 package (SOT764-1) provides 20 terminals in a 2.5 × 4.5 × 0.85 mm footprint with exposed thermal pad, supporting high-density PCB layouts and improved thermal performance over SO20/TSSOP variants. Input clamp diodes permit safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered logic |
| Propagation Delay (D→Q) | 12 ns (VCC = 6.0 V, CL = 50 pF) - enables reliable 40+ MHz bus operation |
| Output Drive Strength | ±7.8 mA (VOH/VOL @ VCC = 4.5 V) - sufficient to drive standard TTL/CMOS loads without buffers |
| Input Thresholds | VIH = 3.15 V, VIL = 1.35 V @ VCC = 4.5 V - CMOS-compatible switching levels with 1.8 V noise margin |
| Operating Temperature | -40 °C to +125 °C - qualified for industrial and extended-temperature embedded control environments |
| Power Dissipation | 8.0 μA ICC (typ, VCC = 6.0 V) - ultra-low static power ideal for always-on subsystems |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - robust handling in automated assembly and field-replaceable modules |
Pinout & Package
DHVQFN20 package (SOT764-1): 2.5 × 4.5 × 0.85 mm body, no leads, 20-terminal quad flat layout with exposed thermal pad (non-soldered or floating per datasheet guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE | Active-LOW 3-state output enable - disables all Q0–Q7 outputs to high-impedance independently of latch state |
| 2–9, 12–19 | D0–D7 / Q0–Q7 | Paired data inputs and latched outputs - bidirectional signal path with strict D→Q timing dependency on LE |
| 10 | GND | Ground reference - primary return path for logic and supply currents; thermal pad not electrically required |
| 11 | LE | Active-HIGH latch enable - controls transparency (LE = HIGH) vs. storage (LE = LOW) mode for all 8 latches |
| 20 | VCC | Positive supply - powers internal CMOS circuitry; decoupling capacitor placement critical near this pin |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range | 2.0–6.0 V operation - eliminates level-shifting in multi-rail systems (e.g., 3.3 V MCU + 5 V peripherals) |
| Input clamp diodes | Integrated protection - permits direct connection to 12 V control signals using series resistors, reducing BOM count |
| Latch-up immunity | >100 mA per JESD78 Class II Level B - ensures robustness against transient ground bounce or supply glitches |
| Thermal-enhanced QFN | SOT764-1 package - 12.9 mW/K derating above 111 °C enables sustained operation in compact enclosures |
| JEDEC compliance | JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) - guarantees interoperability across global logic families and test standards |
Applications
| Microcontroller Bus Expansion | Address/Data Demultiplexing |
|---|---|
Use Scenario: Expanding GPIO count on an ARM Cortex-M0+ MCU by adding external parallel memory or peripheral ICs via 8-bit data bus. IC Role / Device Role / Timing Role: Acts as bidirectional data latch between MCU data bus and peripheral, holding data during address setup and read/write strobes. Use Value: Enables single-cycle bus access without requiring dedicated address latches; LE synchronized to ALE signal ensures deterministic sampling. |
Use Scenario: Separating multiplexed address/data lines (AD0–AD7) from an 8051-family microcontroller for external RAM interfacing. IC Role / Device Role / Timing Role: Captures lower address byte on ALE falling edge, freeing AD lines for data transfer in same cycle. Use Value: Eliminates need for separate address latch IC; 12 ns max D→Q delay ensures setup time compliance with 12 MHz 8051 timing. |
| Industrial I/O Port Buffering | Legacy System Signal Conditioning |
Use Scenario: Isolating PLC digital input/output modules from noisy 24 V field wiring using optocoupler interfaces and level translation. IC Role / Device Role / Timing Role: Provides high-impedance input buffering and controlled 3-state output driving for isolated 8-bit status/control registers. Use Value: Prevents back-driving of upstream logic during hot-swap events; OE-controlled tristate avoids bus contention during firmware updates. |
Use Scenario: Interfacing modern 3.3 V FPGA I/O banks to legacy 5 V TTL logic in avionics maintenance test equipment. IC Role / Device Role / Timing Role: Serves as voltage-tolerant bus transceiver with CMOS input thresholds compatible with both 3.3 V and 5 V signaling. Use Value: Input clamp diodes allow safe 5 V input application with 1 kΩ series resistor; VOH ≥ 4.4 V at 4.5 V VCC meets TTL VIH requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transparent latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT373BQ,115 | TTL-compatible inputs (VIH = 2.0 V min); identical pinout and timing | Better interoperability with legacy 5 V TTL buses; slightly higher ICC at VCC = 5 V | Select when interfacing predominantly with 5 V logic families where input threshold matching is critical |
| SN74HC373PWR | TSSOP20 package (SOT360-1); 10.0 mW/K thermal derating; same electrical specs | Lower profile but reduced thermal mass; requires different PCB land pattern and reflow profile | Select when board height is constrained and thermal load is moderate (< 50 mW total) |
Compared with 74HCT373BQ,115, the HC variant offers wider VCC flexibility and lower power, while SN74HC373PWR trades thermal performance for space savings-choice depends on voltage ecosystem and thermal budget, not functional equivalence.
Availability
74HC373BQ,115 is available at Aetrix Electronics and suitable for industrial control panels, automotive diagnostic tools, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC373BQ,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 logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume applications.
The 74HC373BQ belongs to Nexperia's industry-standard HC logic family, designed specifically for low-power, high-noise-immunity bus interfacing in industrial, computing, and communications infrastructure.
FAQ
What is the function of the exposed thermal pad on the DHVQFN20 package?
The exposed thermal pad (terminal 1 index area) in the SOT764-1 package has no electrical requirement and may remain unsoldered or be floated. If soldered, it must connect only to GND or remain electrically isolated-never tied to VCC or signal nets-to avoid short circuits and ensure thermal performance aligns with the 12.9 mW/K derating curve above 111 °C.
Can 74HC373BQ,115 interface directly with 5 V TTL outputs without level shifters?
No-74HC373BQ,115 uses CMOS input thresholds (VIH ≥ 3.15 V at VCC = 4.5 V), which fall below standard TTL VOH (≥ 2.4 V). While marginal operation may occur, reliable interfacing requires either the pin-compatible 74HCT373BQ,115 (TTL-input version) or a discrete resistor-based level translator to guarantee noise margins exceed 0.7 V across temperature.
How does the latch enable (LE) timing affect data integrity during bus arbitration?
LE must remain HIGH for ≥13 ns before its HIGH-to-LOW transition (th = +5 ns) and stay LOW for ≥16 ns (tW = 14 ns min at VCC = 6.0 V) to ensure valid data capture. Violating these windows causes metastability or incorrect latching-designs must synchronize LE to clock edges with verified setup/hold margins using oscilloscope validation at worst-case VCC and temperature.
Is the 74HC373BQ,115 qualified for automotive applications?
No-this device is specified for -40 °C to +125 °C operation but is not AEC-Q100 qualified. Nexperia explicitly states non-automotive qualification in its legal disclaimers; use in automotive contexts requires formal qualification testing by the end customer and voids Nexperia's warranty for safety-critical functions including airbag controllers or ADAS sensor interfaces.
74HC373BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 8:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 2V ~ 6V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 12ns
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHVQFN (4.5x2.5)
74HC373BQ,115 FAQ
1.How can I place an order for 74HC373BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC373BQ,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 74HC373BQ,115 reliable?
The price and inventory of 74HC373BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC373BQ,115 is usually 5 days.
3.What payment methods are accepted for 74HC373BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC373BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC373BQ,115?
74HC373BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC373BQ,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 74HC373BQ,115?
For technical support, including 74HC373BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC373BQ,115 requirements.
6.How does Aetrix verify that 74HC373BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74HC373BQ,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 74HC373BQ,115 meets industry standards.
7.What is the process for return or replacement of 74HC373BQ,115?
All 74HC373BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC373BQ,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 74HC373BQ,115 part is unused and in its original packaging.
Return procedure for 74HC373BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC373BQ,115 Tags
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