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NXP Semiconductors 74LVCH244ABX,115
- Part No.:
- 74LVCH244ABX,115
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-XFQFN Exposed Pad
- Datasheet:
-
74LVCH244ABX,115.pdf
- Description:
- IC BUFF NON-INVERT 3.6V 20DHXQFN
- Quantity:
- Payment:
- Shipping:
Inventory:16,000
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Product details
Overview
74LVCH244ABX,115 from Nexperia is an octal 3-state buffer/line driver with dual output enables (1OE, 2OE), bus-hold inputs, and overvoltage-tolerant inputs up to 5.5 V. It operates from 1.2 V to 3.6 V, supports mixed-voltage translation between 3.3 V and 5 V systems, and features IOFF partial power-down protection. Used in address/data bus interfacing for industrial microcontroller peripherals.
For engineers reviewing the 74LVCH244ABX,115 datasheet, 74LVCH244ABX,115 pinout, 74LVCH244ABX,115 application, or 74LVCH244ABX,115 equivalent, this device is selected for its Schmitt-trigger input noise immunity, bus-hold functionality eliminating external pull-ups, and guaranteed -40 °C to +125 °C operation in space-constrained PCB layouts.
Technical Context
The 74LVCH244ABX,115 implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE or 2OE). Its bus-hold circuitry actively maintains data input states without external resistors, reducing BOM count and board area.
All inputs include Schmitt-trigger action for robust handling of slow-rising signals, and the IOFF feature disables outputs during power-down to prevent backflow current-critical for hot-swap and partial-power-down system architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.2 V to 3.6 V - Enables direct interface with 1.2 V, 1.8 V, 2.5 V, and 3.3 V logic domains. |
| Input Voltage Range | 0 V to 5.5 V - Supports 5 V-tolerant inputs in mixed-voltage systems without level shifters. |
| Propagation Delay | 1.5 ns to 7.5 ns (VCC = 3.0–3.6 V) - Ensures timing compliance in high-speed bus buffering up to ~133 MHz. |
| Bus Hold Current | ±60 μA to ±75 μA - Maintains stable logic state on floating inputs, eliminating need for external pull-up/down resistors. |
| IOFF Leakage | ±20 μA at VCC = 0 V - Prevents damaging back-current when powered down while system buses remain live. |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - Meets industrial-grade ESD robustness requirements per JEDEC JS-001/JS-002. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood automotive, industrial control, and extended-temperature embedded applications. |
Pinout & Package
DHVQFN20 plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 20 terminals; body 2.5 × 4.5 × 0.85 mm (SOT764-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of Group 1 (1Y0–1Y3) and Group 2 (2Y0–2Y3) 3-state outputs. |
| 1A0–1A3, 2A0–2A3 | Data inputs | Eight buffered inputs with bus-hold; tolerate 5.5 V regardless of VCC. |
| 1Y0–1Y3, 2Y0–2Y3 | 3-state outputs | Non-inverting outputs capable of driving 24 mA sink/source; high-impedance when OE = HIGH. |
| VCC | Supply voltage | Single supply rail (1.2–3.6 V); powers internal logic and output drivers. |
| GND | Ground reference | 0 V reference for all I/O and internal circuitry; must be low-impedance connection. |
Key Features
| Feature | Design Value |
|---|---|
| Bus hold on all data inputs | Eliminates external pull resistors for unused or unterminated data lines, reducing component count and layout complexity. |
| Schmitt-trigger inputs | Provides hysteresis (typically 0.3–0.5 V) to reject noise on slow-rising/falling signals common in long traces or noisy environments. |
| IOFF partial power-down | Automatically disables outputs and isolates I/O when VCC = 0 V, enabling safe insertion/removal in live backplanes. |
| Overvoltage-tolerant inputs | Accepts 5.5 V inputs while VCC is as low as 1.2 V-enables seamless 5 V → 3.3 V or 1.8 V signal translation without external circuitry. |
| JEDEC-compliant voltage standards | Fully compliant with JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V) for interoperability across logic families. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Interfacing microcontroller GPIOs to legacy 5 V sensor buses in programmable logic controllers. IC Role / Device Role / Timing Role: Level-translating octal buffer isolating 3.3 V MCU I/O from 5 V field-side signals while maintaining signal integrity. Use Value: Eliminates discrete level shifters and pull resistors; Schmitt-trigger inputs suppress noise from motor-driven I/O lines. | Use Scenario: Driving multiple LED indicators and relay coils from a 3.3 V automotive microcontroller in a body control unit. IC Role / Device Role / Timing Role: High-drive 3-state buffer enabling shared bus access among multiple subsystems via OE-controlled time-division multiplexing. Use Value: 24 mA output drive capability directly drives LEDs/coils; IOFF prevents backfeed during MCU sleep modes. |
| Medical Diagnostic Equipment Data Bus | Test & Measurement Instrumentation |
Use Scenario: Buffering parallel ADC/DAC data paths in portable ultrasound or ECG front-ends operating at 1.8 V core voltage. IC Role / Device Role / Timing Role: Low-voltage octal driver ensuring clean signal propagation across multi-layer PCB traces with minimal skew (<1.5 ns). Use Value: 1.2 V minimum VCC supports ultra-low-power designs; bus-hold retains last valid sample during brief clock pauses. | Use Scenario: Isolating FPGA configuration I/O banks from external test fixtures during automated functional testing. IC Role / Device Role / Timing Role: 3-state buffer enabling bidirectional signal routing between DUT and tester using synchronized OE control. Use Value: Guaranteed -40 °C to +125 °C operation ensures reliability in environmental chambers; fast enable/disable times (<10 ns) support high-throughput test cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC244ABQ,115 | No bus-hold circuitry; identical pinout, package (SOT764-1), and electrical specs otherwise. | Requires external pull resistors on unused inputs; unsuitable where floating inputs must be stabilized without added components. | Select when cost sensitivity outweighs bus-hold benefit and board space allows discrete pull resistors. |
| SN74LVC244APWR | TSSOP20 package (SOT360-1); same logic function but different thermal profile and footprint. | Higher thermal resistance than DHVQFN20; less suitable for high-density, thermally constrained layouts. | Select only if TSSOP is required for legacy assembly compatibility or rework accessibility. |
Compared with 74LVC244ABQ,115, the 74LVCH244ABX,115 adds bus-hold for input stability without external components; compared with SN74LVC244APWR, it offers superior thermal performance and smaller footprint in DHVQFN20, critical for compact industrial modules.
Availability
74LVCH244ABX,115 is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, automotive body control modules, medical diagnostic equipment data buses, and test & measurement instrumentation requiring stable component supply across extended temperature ranges.
Supply support for 74LVCH244ABX,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, reliable, and energy-efficient logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74LVCH244ABX,115 belongs to Nexperia's LVC/LVCH advanced logic family, engineered specifically for low-voltage, mixed-signal interfacing in space- and power-constrained embedded systems demanding robust noise immunity and wide supply flexibility.
FAQ
What is the maximum input voltage the 74LVCH244ABX,115 can tolerate?
The device accepts input voltages up to 5.5 V regardless of VCC level, enabling direct interfacing with 5 V logic while operating from as low as 1.2 V. This overvoltage tolerance is guaranteed per datasheet Table 5 and eliminates need for external clamping diodes or level shifters in mixed-voltage systems.
Does the 74LVCH244ABX,115 require external pull-up or pull-down resistors on its inputs?
No-bus-hold circuitry is integrated on all data inputs (1A0–1A3, 2A0–2A3), actively maintaining the last valid logic state without external components. Control inputs (1OE, 2OE) lack bus-hold and should be driven or pulled externally if left unconnected.
How does the IOFF feature protect the device during partial power-down?
When VCC = 0 V, the IOFF circuitry disables all outputs and blocks current flow between powered and unpowered sections of the system. This prevents destructive back-current through the device, satisfying IEC 61000-4-2 and supporting hot-plug-capable backplane designs.
Can the 74LVCH244ABX,115 be used in a 5 V-only system?
No-it is not rated for 5 V supply operation; maximum VCC is 3.6 V. However, its 5.5 V-tolerant inputs allow it to receive 5 V signals safely in systems where the host controller runs at ≤3.6 V, making it ideal for translating down from legacy 5 V buses to modern low-voltage logic.
74LVCH244ABX,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVCH
- Package/Case:
- 20-XFQFN 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHXQFN (4.5x2.5)
74LVCH244ABX,115 FAQ
1.How can I place an order for 74LVCH244ABX,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCH244ABX,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 74LVCH244ABX,115 reliable?
The price and inventory of 74LVCH244ABX,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCH244ABX,115 is usually 5 days.
3.What payment methods are accepted for 74LVCH244ABX,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVCH244ABX,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVCH244ABX,115?
74LVCH244ABX,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVCH244ABX,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 74LVCH244ABX,115?
For technical support, including 74LVCH244ABX,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCH244ABX,115 requirements.
6.How does Aetrix verify that 74LVCH244ABX,115 is sourced from the original manufacturer or authorized distributors?
All 74LVCH244ABX,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 74LVCH244ABX,115 meets industry standards.
7.What is the process for return or replacement of 74LVCH244ABX,115?
All 74LVCH244ABX,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCH244ABX,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 74LVCH244ABX,115 part is unused and in its original packaging.
Return procedure for 74LVCH244ABX,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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