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Nexperia USA Inc. 74VHCT245BQ,115
- Part No.:
- 74VHCT245BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
74VHCT245BQ,115.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,605
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Product details
Overview
74VHCT245BQ,115 from Nexperia is an octal non-inverting 3-state bus transceiver with TTL-compatible inputs and CMOS outputs, operating at 4.5 V to 5.5 V supply voltage, supporting bidirectional data flow between two 8-bit buses with independent direction (DIR) and output enable (OE) control, used in industrial backplane interfacing and microcontroller peripheral expansion.
For engineers reviewing the 74VHCT245BQ,115 datasheet, 74VHCT245BQ,115 pinout, 74VHCT245BQ,115 application, or 74VHCT245BQ,115 equivalent, this device delivers sub-10 ns propagation delay at 5 V/50 pF, ±8 mA drive strength, Schmitt-trigger input hysteresis, and -40 °C to +125 °C operation in a thermally enhanced DHVQFN20 package for high-density PCB layouts.
Technical Context
The 74VHCT245BQ,115 implements dual-bus bidirectional data transfer using a single DIR pin to select A→B or B→A direction, and an active-low OE pin to place all 16 I/Os into high-impedance state-enabling bus isolation without external logic. Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure compatibility with legacy 5 V logic families.
Internally, it uses Si-gate CMOS technology with balanced rise/fall propagation delays, Schmitt-trigger inputs on all pins for noise immunity, and input overvoltage tolerance up to 7.0 V. The device meets JEDEC JS-001 Class 2 HBM (>2000 V) and JS-002 Class C3 CDM (>1000 V) ESD specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - Ensures stable operation across standard 5 V rail tolerances and brown-out margins. |
| Propagation Delay (tpd) | 3.5 ns (typ) / 10.0 ns (max) at 5 V/15 pF - Enables reliable timing in high-speed parallel bus systems up to ~100 MHz. |
| Output Drive (IO) | ±8.0 mA - Sufficient to drive 50 pF loads with <10 ns edge rates while maintaining VOH ≥ 3.7 V and VOL ≤ 0.55 V. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - Guarantees interoperability with TTL, LVTTL, and 5 V microcontroller GPIOs. |
| Operating Temperature | -40 °C to +125 °C - Qualified for extended industrial and under-hood embedded applications without derating. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Reduces field failure risk in manual handling and board assembly environments. |
| Power Dissipation (Ptot) | 500 mW max at Tamb ≤ 111 °C - Supports continuous operation in compact enclosures with minimal thermal design overhead. |
Pinout & Package
DHVQFN20 (SOT764-1) package: 2.5 mm × 4.5 mm × 0.85 mm body, no leads, exposed thermal pad (non-soldered by default), 20 terminals arranged in quad configuration with terminal 1 index area marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: LOW enables A→B data flow; HIGH enables B→A. |
| 2–9 | A0–A7 | Bus A side I/Os - connected to microcontroller or ASIC data port; driven or received based on DIR/OE state. |
| 10 | GND | Ground reference - electrically isolated thermal pad must remain floating or tied to GND per layout guidelines. |
| 11–18 | B0–B7 | Bus B side I/Os - interface to memory, peripheral, or backplane; electrically isolated when OE = HIGH. |
| 19 | OE | Active-low output enable - all A/B pins enter high-Z when HIGH, enabling multi-drop bus arbitration. |
| 20 | VCC | Positive supply - decoupling capacitor (100 nF) required within 3 mm of this pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max at 5 V - eliminates level-shifter requirement when interfacing with legacy 5 V logic. |
| Schmitt-trigger action | Hysteresis ≥ 0.3 V on all inputs - rejects noise on slow-rising or noisy control lines like DIR and OE. |
| Thermally enhanced package | DHVQFN20 with 0.85 mm height and 2.5 × 4.5 mm footprint - improves power density and reduces PCB area vs SO20/TSSOP20. |
| High noise immunity | Input overvoltage tolerance to 7.0 V - allows safe hot-plug or mixed-voltage system integration without clamping diodes. |
| Low static current | ICC ≤ 80 μA at 5.5 V - minimizes quiescent power in always-on industrial controllers and remote sensors. |
Applications
| Industrial PLC Backplane Interface | Microcontroller Peripheral Expansion |
|---|---|
|
Use Scenario: Bidirectional data exchange between CPU module and I/O expansion cards in modular programmable logic controllers. IC Role / Device Role / Timing Role: Bus transceiver isolating CPU address/data bus from card-specific peripherals while supporting hot-swap sequencing via OE control. Use Value: Enables deterministic 8-bit parallel communication with <10 ns skew across all lanes and robust noise rejection in electrically noisy factory environments. |
Use Scenario: Extending GPIO count and memory-mapped peripheral access for ARM Cortex-M or RISC-V SoCs with limited native I/O. IC Role / Device Role / Timing Role: Direction-controlled data bridge between MCU's internal APB/AHB bus and external SRAM, EEPROM, or display controller. Use Value: Delivers cycle-accurate read/write handshaking with sub-10 ns tpd and full 5 V drive capability-eliminating need for discrete buffers or level shifters. |
| Automated Test Equipment (ATE) Signal Routing | Legacy System Bus Interfacing |
|
Use Scenario: Multiplexing test signals between DUT interface boards and pattern generator/analyzer resources in rack-mounted ATE platforms. IC Role / Device Role / Timing Role: Isolation switch enabling dynamic reconfiguration of signal paths under software control via DIR and OE pins. Use Value: Provides precise 3-state control with <12 ns enable/disable times, ensuring glitch-free switching during test vector transitions. |
Use Scenario: Interfacing modern low-power MCUs to legacy 5 V parallel interfaces such as ISA, PC/104, or industrial instrumentation buses. IC Role / Device Role / Timing Role: Level-tolerant bus translator preserving signal integrity across mixed-voltage domains without external biasing. Use Value: Maintains TTL-compatible input thresholds and 5 V CMOS output swing-ensuring bit-perfect data transfer with legacy peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC245ABQ,115 | Lower VCC range (1.65–3.6 V); LVTTL inputs; 3.3 V only operation | Not suitable for 5 V legacy systems; requires level translation if interfacing to 5 V peripherals | Select when system operates exclusively at 3.3 V and lowest static power (<10 μA ICC) is critical. |
| SN74LVC245APWR | TSSOP20 package; identical electrical specs but higher thermal resistance (θJA = 100 K/W vs 65 K/W) | Less suitable for high ambient temperature or high-duty-cycle operation due to reduced thermal performance | Choose only if TSSOP20 footprint is mandated and thermal margin exceeds 20 °C above ambient. |
Compared with 74LVC245ABQ,115 and SN74LVC245APWR, the 74VHCT245BQ,115 uniquely supports direct 5 V TTL interfacing without level shifters and delivers superior thermal dissipation in space-constrained industrial modules.
Availability
74VHCT245BQ,115 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded computing applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74VHCT245BQ,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 MOSFET solutions for automotive, industrial, and consumer markets.
The 74VHCT245BQ,115 belongs to Nexperia's VHCT logic family-designed specifically for seamless migration from legacy TTL systems to modern CMOS-based designs while preserving pinout and electrical compatibility.
FAQ
What is the maximum clock frequency supported by the 74VHCT245BQ,115 in a data bus application?
The 74VHCT245BQ,115 does not operate on a clock signal-it is asynchronous. Its usable data rate depends on propagation delay (≤10 ns) and load capacitance. At 50 pF, it reliably supports bus toggle rates up to 50 MHz (20 ns period), assuming clean edges and proper termination. Timing margins must include enable/disable delays (≤13.5 ns) for controlled bus arbitration.
Can the thermal pad on the DHVQFN20 package be soldered to ground?
Yes-the exposed thermal pad (terminal 1) may be soldered to a GND plane to improve thermal performance, but it must not be electrically connected unless tied directly to GND. Per Nexperia's datasheet, if soldered, the pad must remain floating or connected solely to GND; connecting it to any other net risks latch-up or parametric shift.
Is the 74VHCT245BQ,115 qualified for automotive applications?
No-the 74VHCT245BQ,115 is specified for industrial temperature range (-40 °C to +125 °C) but is not AEC-Q100 qualified. Nexperia explicitly states in its legal disclaimers that non-automotive qualified products are unsuitable for safety-critical or automotive use, and no automotive testing or qualification has been performed on this part.
How does the Schmitt-trigger input affect system-level noise immunity?
The Schmitt-trigger action provides ≥0.3 V hysteresis on all inputs (DIR, OE, A0–A7, B0–B7), meaning a signal must cross VIH (2.0 V) to register HIGH and fall below VIL (0.8 V) to register LOW. This prevents multiple transitions on slow or noisy control lines-critical for reliable OE assertion during bus arbitration or DIR toggling in EMI-prone industrial enclosures.
74VHCT245BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74VHCT
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHVQFN (4.5x2.5)
74VHCT245BQ,115 FAQ
1.How can I place an order for 74VHCT245BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT245BQ,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 74VHCT245BQ,115 reliable?
The price and inventory of 74VHCT245BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT245BQ,115 is usually 5 days.
3.What payment methods are accepted for 74VHCT245BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT245BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT245BQ,115?
74VHCT245BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT245BQ,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 74VHCT245BQ,115?
For technical support, including 74VHCT245BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT245BQ,115 requirements.
6.How does Aetrix verify that 74VHCT245BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74VHCT245BQ,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 74VHCT245BQ,115 meets industry standards.
7.What is the process for return or replacement of 74VHCT245BQ,115?
All 74VHCT245BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT245BQ,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 74VHCT245BQ,115 part is unused and in its original packaging.
Return procedure for 74VHCT245BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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