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NXP Semiconductors 74LVCH244ADB,118
- Part No.:
- 74LVCH244ADB,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVCH244ADB,118.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,116
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Product details
Overview
74LVCH244ADB,118 from Nexperia is an octal 3-state buffer/line driver with bus-hold inputs, dual output enables (1OE, 2OE), 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. It is used in address/data bus interfacing for industrial microcontroller peripherals.
For engineers reviewing the 74LVCH244ADB,118 datasheet, 74LVCH244ADB,118 pinout, 74LVCH244ADB,118 application, or 74LVCH244ADB,118 equivalent, this device is selected for level-shifting, bus isolation, and noise-immune signal buffering in space-constrained PCBs requiring Schmitt-trigger input tolerance and guaranteed bus-hold retention on un-driven data lines.
Technical Context
The 74LVCH244ADB,118 implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE for Y0–Y3, 2OE for Y4–Y7). Its Schmitt-trigger inputs accept slow-rising signals and tolerate VI up to 5.5 V regardless of VCC, enabling robust interfacing with legacy 5 V logic while powered at 1.8 V or 3.3 V.
IOFF circuitry disables outputs and blocks backflow current when VCC = 0 V, supporting hot-swap and partial power-down modes. Bus-hold functionality (exclusive to LVCH variant) maintains last valid logic state on all eight data inputs without external pull resistors, reducing BOM count and board area in floating-bus applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.2 V to 3.6 V - Enables operation across low-power IoT nodes (1.2 V core) and standard 3.3 V I/O domains. |
| Input voltage tolerance | Up to 5.5 V - Allows direct connection to 5 V TTL/CMOS outputs without level shifters in mixed-voltage systems. |
| Propagation delay | 1.5 ns to 7.5 ns (VCC = 3.0–3.6 V) - Supports high-speed bus buffering up to ~133 MHz clock domains with tight timing margins. |
| Bus hold current | ±60 μA to ±75 μA (VCC = 3.0 V) - Actively sustains input logic state without external biasing, eliminating need for 10 kΩ pull-up/down resistors. |
| IOFF leakage | ±20 μA max at VCC = 0 V - Prevents damaging back-current during power sequencing or hot-plug events in modular systems. |
| 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, motor control, and industrial PLC environments. |
Pinout & Package
74LVCH244ADB,118 is packaged in SOT339-1 (SSOP20): plastic shrink small outline package, 20 leads, 0.65 mm pitch, body width 5.3 mm, 1.2 mm height. Pin 1 index located at top-left corner with beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group A (pins 18,16,14,12) or Group B (pins 3,5,7,9) outputs to high-impedance state. |
| 2,4,6,8 | 1A0–1A3 | Data inputs for first 4-bit buffer group - each has Schmitt-trigger and bus-hold circuitry. |
| 3,5,7,9 | 2Y0–2Y3 | Outputs for second 4-bit buffer group - driven only when 2OE = LOW; high-impedance otherwise. |
| 10 | GND | Ground reference - must be connected to system 0 V plane; serves as return path for all I/O and supply currents. |
| 11,13,15,17 | 2A0–2A3 | Data inputs for second 4-bit buffer group - identical electrical behavior to 1A0–1A3. |
| 12,14,16,18 | 1Y0–1Y3 | Outputs for first 4-bit buffer group - driven only when 1OE = LOW; high-impedance otherwise. |
| 20 | VCC | Positive supply - powers internal logic and output drivers; decoupling capacitor (100 nF) required within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-hold on all data inputs | Maintains last valid logic state without external resistors - reduces component count and layout complexity in bus-hold-dependent designs. |
| Schmitt-trigger inputs | Input hysteresis ≥ 0.3 V (VCC = 3.3 V) - rejects noise and accommodates slow-edge signals from mechanical switches or long traces. |
| Overvoltage-tolerant inputs | VI absolute max = +5.5 V independent of VCC - eliminates level translators when interfacing with 5 V sensors or legacy controllers. |
| IOFF partial power-down | Output leakage ≤ ±20 μA at VCC = 0 V - prevents back-driving powered subsystems during power sequencing or fault conditions. |
| JEDEC-compliant voltage ranges | Validated per JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), JESD8-C/JESD36 (2.7–3.6 V) - ensures interoperability across multi-rail SoC platforms. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Isolating MCU GPIOs from noisy 24 V field I/O cards via optocoupler interfaces. IC Role / Device Role / Timing Role: Bidirectional bus buffer with 3-state control synchronizing read/write cycles between isolated domains. Use Value: Bus-hold retains last command state during brief power glitches; IOFF prevents backfeed into MCU during card hot-swap. |
Use Scenario: Level-shifting sensor data (5 V analog front-end) to 3.3 V MCU ADC inputs in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional voltage translator with Schmitt-trigger noise rejection on slow-moving switch inputs. Use Value: 5.5 V input tolerance accepts raw switch signals directly; −40 °C to +125 °C rating matches under-dash thermal profile. |
| Embedded Test Equipment Signal Routing | Medical Diagnostic Instrument Data Bus |
|
Use Scenario: Multiplexing multiple FPGA I/O banks onto shared test probe headers in automated test fixtures. IC Role / Device Role / Timing Role: Low-latency (≤7.5 ns) 3-state buffer enabling dynamic bus ownership arbitration. Use Value: Propagation delay variation ≤1.5 ns (tsk(o)) ensures deterministic timing across all eight channels during high-speed pattern generation. |
Use Scenario: Buffering serial SPI commands between ARM Cortex-M7 host and isolated patient-monitoring sensor ICs. IC Role / Device Role / Timing Role: Isolation buffer preventing ground-loop coupling while maintaining sub-10 ns signal integrity. Use Value: 1.2 V minimum VCC supports ultra-low-power sleep modes; HBM > 2000 V meets IEC 61000-4-2 medical ESD immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC244ADB,118 | No bus-hold; lower input hysteresis; same pinout and VCC range. | Requires external pull resistors on floating inputs; less suitable for unconnected test points or intermittent connectors. | Select when cost sensitivity outweighs bus-hold benefit and board space allows discrete biasing. |
| SN74LVC244APWR | TSSOP20 package (SOT360-1); identical electrical specs but different thermal resistance (10.0 mW/K derating above 100 °C). | Better high-frequency performance due to lower parasitic inductance; preferred for >50 MHz bus rates. | Choose for improved signal integrity in dense layouts where SSOP lead geometry causes crosstalk. |
Compared with 74LVC244ADB,118, the LVCH variant adds bus-hold and stronger Schmitt action at no speed penalty; versus SN74LVC244APWR, the SSOP package offers higher creepage/clearance for reinforced isolation but slightly higher trace inductance.
Availability
74LVCH244ADB,118 is available at Aetrix Electronics and suitable for industrial PLC backplane interface, automotive body control modules, embedded test equipment signal routing, and medical diagnostic instrument data buses requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for 74LVCH244ADB,118 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 efficient logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74LVCH244A series targets robust, low-power bus interfacing in harsh environments - designed specifically for mixed-voltage translation, hot-swap resilience, and reduced external component count in space-constrained embedded systems.
FAQ
Can 74LVCH244ADB,118 drive 50 Ω transmission lines directly?
No. Its typical output drive strength is ±24 mA at VCC = 3.0 V, optimized for CMOS loading (CL ≤ 50 pF), not 50 Ω impedance matching. For transmission line driving, use a dedicated line driver IC or add series termination. The device's 1.5 ns to 7.5 ns propagation delay and 1.0 ns output skew are specified under capacitive loads, not resistive terminations.
Does bus-hold operate when VCC = 1.2 V?
Yes. Bus-hold circuitry is fully functional across the entire 1.2 V to 3.6 V supply range. At VCC = 1.2 V, IBHL and IBHH are specified at ±10 μA, sufficient to maintain logic state against typical PCB leakage (<1 μA). This enables reliable operation in ultra-low-power sleep modes where VCC remains active but reduced.
What is the maximum clock frequency supported for toggling 1OE/2OE?
Enable/disable timing (ten/tdis) is guaranteed ≤9.5 ns at VCC = 3.6 V, allowing safe control at ≤100 MHz toggle rates. However, practical maximum depends on system-level setup/hold margins relative to data edges. For synchronous bus arbitration, ensure OE transitions occur during known idle periods - not mid-data transfer - to avoid metastability or bus contention.
Is the SSOP20 (SOT339-1) package RoHS and REACH compliant?
Yes. 74LVCH244ADB,118 in SOT339-1 packaging complies with EU RoHS Directive 2011/65/EU (Pb-free, Cd < 100 ppm, homogeneous material) and REACH Regulation (EC) No. 1907/2006 (SVHCs below threshold). Certificate of Compliance is available upon request and references Nexperia's standard material declarations dated November 2024.
74LVCH244ADB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVCH
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- 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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
74LVCH244ADB,118 FAQ
1.How can I place an order for 74LVCH244ADB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCH244ADB,118 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 74LVCH244ADB,118 reliable?
The price and inventory of 74LVCH244ADB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCH244ADB,118 is usually 5 days.
3.What payment methods are accepted for 74LVCH244ADB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVCH244ADB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVCH244ADB,118?
74LVCH244ADB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVCH244ADB,118 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 74LVCH244ADB,118?
For technical support, including 74LVCH244ADB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCH244ADB,118 requirements.
6.How does Aetrix verify that 74LVCH244ADB,118 is sourced from the original manufacturer or authorized distributors?
All 74LVCH244ADB,118 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 74LVCH244ADB,118 meets industry standards.
7.What is the process for return or replacement of 74LVCH244ADB,118?
All 74LVCH244ADB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCH244ADB,118, 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 74LVCH244ADB,118 part is unused and in its original packaging.
Return procedure for 74LVCH244ADB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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