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NXP Semiconductors 74VHC244BQ,115
- Part No.:
- 74VHC244BQ,115
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74VHC244BQ,115.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,221
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Product details
Overview
74VHC244BQ,115 from Nexperia is an octal non-inverting 3-state buffer/line driver in DHVQFN20 package, operating from 2.0 V to 5.5 V with CMOS input levels, 8.4 ns typical propagation delay at 3.3 V/15 pF, and -40 °C to +125 °C temperature range-used for bidirectional bus interfacing in industrial control backplanes and FPGA I/O expansion.
For engineers reviewing the 74VHC244BQ,115 datasheet, 74VHC244BQ,115 pinout, 74VHC244BQ,115 application, or 74VHC244BQ,115 equivalent, key selection criteria include 3-state output timing (enable/disable), input voltage compatibility (CMOS-level only), thermal performance in compact QFN layout, and static drive capability (±8 mA at 4.5 V).
Technical Context
This device implements two independent 4-bit non-inverting buffers, each with dedicated active-low output enable (1OE, 2OE). Outputs enter high-impedance state when respective OE is HIGH, enabling shared-bus contention management without external logic.
All eight inputs feature Schmitt-trigger action for noise immunity, accept voltages up to 7.0 V regardless of VCC, and exhibit ≤10 pF input capacitance. The DHVQFN20 package provides enhanced thermal dissipation (12.9 mW/K derating above 111 °C) versus SO20 or TSSOP20 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 5.5 V - supports mixed-voltage system interfacing (e.g., 3.3 V FPGA to 5 V peripheral bus) |
| Propagation Delay (tpd) | 8.4 ns max @ 3.3 V/15 pF - enables reliable 100 MHz bus operation with margin |
| Output Drive Strength | ±8 mA @ VOH/VOL - sufficient to drive 50 Ω transmission lines or 10 TTL loads |
| Input Thresholds | VIH = 3.85 V min @ VCC = 5.5 V; VIL = 1.65 V max - strict CMOS-compatible thresholds, not TTL |
| ESD Protection | HBM >2000 V, CDM >1000 V - meets industrial handling requirements without additional protection circuitry |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood industrial and extended-temperature embedded applications |
| Power Dissipation | 500 mW max @ Tamb ≤111 °C - supports continuous operation in thermally constrained PCB layouts |
Pinout & Package
DHVQFN20 (SOT764-1) package: 2.5 × 4.5 × 0.85 mm body, no leads, exposed thermal pad (non-soldered by default), 20 terminals in quad arrangement with terminal 1 index area marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low enable inputs controlling Group 1 (pins 2,4,6,8→18,16,14,12) and Group 2 (pins 17,15,13,11→3,5,7,9) outputs independently |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 data inputs - routed directly to corresponding 1Yn outputs when 1OE = LOW |
| 17, 15, 13, 11 | 2A0–2A3 | Group 2 data inputs - routed directly to corresponding 2Yn outputs when 2OE = LOW |
| 18, 16, 14, 12 | 1Y0–1Y3 | Group 1 buffered non-inverting outputs - high-impedance when 1OE = HIGH |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 buffered non-inverting outputs - high-impedance when 2OE = HIGH |
| 10 | GND | Ground reference (0 V) - must be connected; thermal pad may remain floating or tied to GND per design |
| 20 | VCC | Positive supply - decoupling capacitor required within 5 mm for stable switching performance |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables robust noise rejection on slow-rising or noisy control signals (e.g., mechanical switch debouncing) |
| Voltage-tolerant inputs | Accepts up to 7.0 V regardless of VCC - allows safe interfacing with higher-voltage logic domains without level shifters |
| Balanced propagation delays | tpLH ≈ tpHL within ±0.5 ns - critical for maintaining signal integrity in synchronous parallel buses |
| Low dynamic power | CPD = 10 pF - reduces switching current and EMI in high-frequency data paths |
| Thermally enhanced QFN | 0.85 mm profile with exposed pad - improves heat transfer in dense, fanless industrial PCBs |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Isolating and driving 8-bit address/data lines between a microcontroller and multiple peripheral modules on a shared bus. IC Role / Device Role / Timing Role: Bidirectional buffer with independent group enables, managing bus contention during read/write cycles. Use Value: Prevents signal corruption during simultaneous access; 8.4 ns tpd ensures setup/hold compliance at 25 MHz bus clock. |
Use Scenario: Extending limited FPGA GPIO count to drive external LEDs, switches, and sensor interfaces. IC Role / Device Role / Timing Role: Level-shifting and fan-out buffer translating 3.3 V FPGA outputs to 5 V peripherals. Use Value: Eliminates need for discrete MOSFET translators; ±8 mA drive supports direct LED sinking without current-limiting resistors. |
| Automated Test Equipment (ATE) | Programmable Logic Controller (PLC) Module |
|
Use Scenario: Routing test signals between DUT interface board and pattern generator/analyzer channels. IC Role / Device Role / Timing Role: Signal conditioning and isolation stage before high-speed digital acquisition. Use Value: Schmitt-trigger inputs reject noise from relay bounce or crosstalk; 125 °C rating supports operation near power supplies. |
Use Scenario: Interfacing field I/O cards with central CPU backplane in modular PLC chassis. IC Role / Device Role / Timing Role: Bus transceiver enabling hot-swap-safe insertion of I/O modules. Use Value: 3-state outputs prevent bus contention during module insertion/removal; DHVQFN20 footprint saves space on dense carrier boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74VHCT244BQ,115 | TTL-compatible inputs (VIH = 2.0 V min); otherwise identical pinout, timing, and package | Required when interfacing legacy 5 V TTL logic; incompatible with pure CMOS systems due to lower VIH threshold | Select only if driven by standard TTL outputs; verify VIH/VIL margins against source logic family |
| SN74LVC244APWR | Lower VCC range (1.65–3.6 V); 3.3 V only; 5.3 ns tpd @ 3.3 V/15 pF; TSSOP20 package | Optimized for low-voltage portable systems; lacks 5 V tolerance and extended temperature support | Choose for battery-powered designs needing <3.6 V operation and minimal propagation delay; not suitable for industrial 5 V buses |
Compared with 74VHC244BQ,115, the 74VHCT244BQ,115 trades CMOS input compatibility for TTL interoperability, while the SN74LVC244APWR sacrifices voltage flexibility and thermal range for speed and ultra-low-voltage operation-making the 74VHC244BQ,115 optimal for ruggedized 3.3/5 V mixed-signal industrial interfaces.
Availability
74VHC244BQ,115 is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, automated test equipment, and programmable logic controller modules requiring stable component supply across extended temperature ranges.
Supply support for 74VHC244BQ,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 high-volume, high-reliability logic, analog, and discrete components for automotive, industrial, and consumer markets.
The 74VHC series delivers high-speed CMOS logic with robust ESD protection and wide supply range, designed specifically for noise-immune, thermally demanding industrial control and communication infrastructure applications.
FAQ
What is the maximum input voltage the 74VHC244BQ,115 can tolerate?
The 74VHC244BQ,115 accepts input voltages up to 7.0 V regardless of VCC level, as specified in Table 4 (Limiting Values). This allows safe interfacing with higher-voltage logic families without clamping diodes or level shifters, provided input current remains within ±20 mA limits.
Can the thermal pad on the DHVQFN20 package be soldered to ground?
Yes-the exposed thermal pad (terminal 1 index area) may be left floating or connected to GND per PCB layout requirements. If soldered, the land must remain electrically isolated from other planes unless intentionally tied to GND; no mechanical or electrical requirement mandates soldering.
How does the 74VHC244BQ,115 differ from the 74VHCT244BQ,115?
The 74VHC244BQ,115 uses CMOS input thresholds (VIH ≥ 3.85 V @ VCC = 5.5 V), while the 74VHCT244BQ,115 uses TTL-compatible thresholds (VIH ≥ 2.0 V). Both share identical pinout, timing, and packaging-but mixing them in the same design risks input recognition failure.
Is the 74VHC244BQ,115 qualified for automotive applications?
No-the 74VHC244BQ,115 is not automotive-qualified. It is rated for industrial temperature range (-40 °C to +125 °C) but lacks AEC-Q100 qualification, automotive-specific testing, or guaranteed PPAP documentation. Use only in non-safety-critical industrial or commercial systems.
74VHC244BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74VHC
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHVQFN (4.5x2.5)
74VHC244BQ,115 FAQ
1.How can I place an order for 74VHC244BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHC244BQ,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 74VHC244BQ,115 reliable?
The price and inventory of 74VHC244BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHC244BQ,115 is usually 5 days.
3.What payment methods are accepted for 74VHC244BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHC244BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHC244BQ,115?
74VHC244BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHC244BQ,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 74VHC244BQ,115?
For technical support, including 74VHC244BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHC244BQ,115 requirements.
6.How does Aetrix verify that 74VHC244BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74VHC244BQ,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 74VHC244BQ,115 meets industry standards.
7.What is the process for return or replacement of 74VHC244BQ,115?
All 74VHC244BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHC244BQ,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 74VHC244BQ,115 part is unused and in its original packaging.
Return procedure for 74VHC244BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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