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NXP Semiconductors 74LVTH244APW,118
- Part No.:
- 74LVTH244APW,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVTH244APW,118.pdf
- Description:
- IC BUFF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:40,231
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Product details
Overview
74LVTH244APW,118 from Nexperia is a 3.3 V octal 3-state buffer/line driver in TSSOP20 package, featuring dual independent 4-bit output enables (1OE, 2OE), ±32 mA/±64 mA drive capability, bus hold inputs eliminating external pull-ups, and 5.5 V overvoltage-tolerant inputs. It operates from −40 °C to +85 °C and is used in high-speed digital bus interfacing between 3.3 V logic domains and legacy 5 V systems.
For engineers reviewing the 74LVTH244APW,118 datasheet, 74LVTH244APW,118 pinout, 74LVTH244APW,118 application, or 74LVTH244APW,118 equivalent, key selection criteria include its dual OE control architecture, bus hold functionality, 2.7–3.6 V supply range, and compatibility with TTL-level inputs while driving 5 V buses without current loading.
Technical Context
This BiCMOS device implements two independent 4-bit non-inverting buffers with active-low 3-state outputs. Each group (Y0–Y3 and Y0'–Y3') is controlled by its own enable input (1OE, 2OE), enabling selective bus isolation without affecting the other channel.
Its IOFF circuitry ensures partial power-down operation during VCC = 0 V, limiting off-state leakage to ±100 μA. Bus hold inputs maintain stable logic states on unused pins at VI = 0.8 V (LOW) or 2.0 V (HIGH), with IBHL/IBHH currents of 75–150 μA, eliminating external biasing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Enables interoperability across 3.3 V system rails with margin for ripple and drop. |
| Input Voltage Range | 0 V to 5.5 V - Allows direct connection to 5 V TTL outputs without level shifters. |
| Output Drive | +64 mA / −32 mA - Supports heavy capacitive loads and fan-out to multiple CMOS/TTL inputs. |
| Propagation Delay | 1.0–4.1 ns (VCC = 3.3 V) - Suitable for >200 MHz bus operation with tight timing budgets. |
| Bus Hold Current | ±75 to ±150 μA - Maintains defined logic state on floating inputs without external resistors. |
| IOFF Leakage | ±100 μA at VCC = 0 V - Prevents back-powering and signal corruption during hot-swap or power sequencing. |
| Operating Temperature | −40 °C to +85 °C - Qualified for industrial-grade embedded and communications equipment. |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group 1 (Y0–Y3) or Group 2 (Y0'–Y3'). |
| 2, 4, 6, 8 | 1A0–1A3 | Data inputs for first 4-bit buffer group - routed to outputs 1Y0–1Y3 when 1OE = LOW. |
| 11, 13, 15, 17 | 2A0–2A3 | Data inputs for second 4-bit buffer group - routed to outputs 2Y0–2Y3 when 2OE = LOW. |
| 18, 16, 14, 12 | 1Y0–1Y3 | 3-state outputs for first group - high-impedance when 1OE = HIGH. |
| 9, 7, 5, 3 | 2Y0–2Y3 | 3-state outputs for second group - high-impedance when 2OE = HIGH. |
| 10 | GND | Ground reference - common return path for all I/O and internal circuitry. |
| 20 | VCC | Positive supply - powers internal BiCMOS logic and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit enables | Enables selective bus segmentation - isolate memory and peripheral buses simultaneously without shared control logic. |
| Bus hold inputs | Eliminates need for 10 kΩ pull-up/down resistors on unused data lines, reducing BOM count and board space. |
| 5.5 V overvoltage-tolerant inputs | Permits direct interface with 5 V TTL outputs while powered from 3.3 V, avoiding level translators in mixed-voltage systems. |
| IOFF partial power-down | Prevents current flow through I/O pins during power-off, supporting live insertion and safe hot-swap in modular backplanes. |
| Latch-up immunity | Exceeds 500 mA per JESD78 Class II Level B - ensures robustness against transient voltage spikes in noisy industrial environments. |
Applications
| Industrial PLC Backplane Interface | Embedded Memory Expansion Bus |
|---|---|
|
Use Scenario: Interfacing 3.3 V microcontroller address/data bus to legacy 5 V SRAM or EPROM modules on a programmable logic controller backplane. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer isolating CPU and memory domains; provides level translation and drive strength matching. Use Value: Eliminates external level shifters and pull-up networks while maintaining <4.1 ns propagation delay for 20+ MHz bus clocking. |
Use Scenario: Expanding GPIO count on an ARM Cortex-M4-based HMI controller using parallel-connected 8-bit I/O expanders. IC Role / Device Role / Timing Role: Unidirectional data latching buffer - drives expander control lines with ±64 mA sink/source to overcome trace capacitance. Use Value: Ensures reliable signal integrity across 10+ cm PCB traces at 10 MHz toggle rates without added termination or slew-rate control. |
| Communications Module Data Multiplexing | Test Equipment Digital Pattern Generator |
|
Use Scenario: Sharing a single 8-bit test bus among multiple FPGA-based protocol analyzers in automated test equipment. IC Role / Device Role / Timing Role: 3-state multiplexer - enables/disables FPGA data paths via independent OE signals synchronized to test clock edges. Use Value: Achieves glitch-free bus arbitration with <5.2 ns tPZH/tPLZ, preventing metastability during dynamic channel switching. |
Use Scenario: Driving high-capacitance DUT interface connectors (≥50 pF) from low-voltage FPGA I/O banks in benchtop pattern generators. IC Role / Device Role / Timing Role: Output line driver - boosts signal edge rate and voltage swing to meet JEDEC-compliant logic thresholds at load. Use Value: Delivers 2.2 V VOH at −32 mA and 0.55 V VOL at 64 mA into 50 pF, ensuring clean transitions up to 100 MHz. |
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 |
|---|---|---|---|
| SN74LVC244APWR | Lower drive (±24 mA), no bus hold, 1.65–3.6 V supply - lacks overvoltage tolerance. | Suitable only for pure 3.3 V systems; requires external pull-ups on unused inputs. | Select when cost sensitivity outweighs mixed-voltage interface needs and board space permits pull-up resistors. |
| 74ALVC244PW,118 | Higher speed (tPD = 2.3 ns typ), same 2.7–3.6 V range, but no bus hold or 5.5 V tolerant inputs. | Optimized for minimal propagation delay in high-frequency clock distribution, not bus interfacing. | Choose for sub-3 ns timing-critical paths where input voltage compatibility and bus hold are secondary. |
Compared with SN74LVC244APWR and 74ALVC244PW,118, the 74LVTH244APW,118 uniquely combines 5.5 V input tolerance, integrated bus hold, and ±64 mA drive - making it the only option for robust 3.3 V ↔ 5 V bus bridging without auxiliary components.
Availability
74LVTH244APW,118 is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, embedded memory expansion buses, communications module data multiplexing, and test equipment digital pattern generation requiring stable component supply across extended temperature ranges.
Supply support for 74LVTH244APW,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 logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.
The 74LVTH series targets high-speed, mixed-voltage digital interfacing - designed specifically for 3.3 V systems needing seamless integration with legacy 5 V logic while minimizing external components and layout complexity.
FAQ
Can 74LVTH244APW,118 drive a 5 V bus while powered from 3.3 V?
Yes. Its inputs tolerate up to 5.5 V regardless of VCC, and outputs enter high-impedance when disabled - preventing current flow into a 5 V bus. When enabled, outputs swing rail-to-rail within the 3.3 V domain but remain compatible with TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V).
What is the purpose of the bus hold feature?
The bus hold circuit actively maintains the last valid logic state on each input pin using weak feedback transistors. With IBHL/IBHH currents of ±75–150 μA, it eliminates floating inputs without external resistors - critical for unused data lines in configurable bus architectures.
How does IOFF functionality improve system reliability?
When VCC = 0 V, IOFF limits I/O pin leakage to ±100 μA, preventing back-powering of the device or unintended activation of downstream circuitry. This supports safe hot-swap operations in modular backplanes and avoids latch-up during uncontrolled power sequencing.
Is this device qualified for automotive use?
No. The 74LVTH244APW,118 is specified for industrial temperature range (−40 °C to +85 °C) and carries no AEC-Q100 qualification. Nexperia explicitly states non-automotive qualification in its legal disclaimers - it must not be used in safety-critical vehicle systems without additional validation.
74LVTH244APW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVTH
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74LVTH244APW,118 FAQ
1.How can I place an order for 74LVTH244APW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH244APW,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 74LVTH244APW,118 reliable?
The price and inventory of 74LVTH244APW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH244APW,118 is usually 5 days.
3.What payment methods are accepted for 74LVTH244APW,118?
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4.How is shipping managed for 74LVTH244APW,118?
74LVTH244APW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH244APW,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 74LVTH244APW,118?
For technical support, including 74LVTH244APW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH244APW,118 requirements.
6.How does Aetrix verify that 74LVTH244APW,118 is sourced from the original manufacturer or authorized distributors?
All 74LVTH244APW,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 74LVTH244APW,118 meets industry standards.
7.What is the process for return or replacement of 74LVTH244APW,118?
All 74LVTH244APW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH244APW,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 74LVTH244APW,118 part is unused and in its original packaging.
Return procedure for 74LVTH244APW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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