My Inquiry
My Account
NXP Semiconductors 74LVTH244AD,118
- Part No.:
- 74LVTH244AD,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVTH244AD,118.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:14,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVTH244AD,118 from Nexperia is a 3.3 V octal 3-state buffer/line driver in SO20 (SOT163-1) package, featuring dual independent 4-bit channels with active-low output enables (1OE, 2OE), ±32 mA/±64 mA drive capability, bus hold inputs eliminating external pull-ups, and 5.5 V-tolerant inputs for mixed-voltage interfacing in backplane or motherboard data routing applications.
For engineers reviewing the 74LVTH244AD,118 datasheet, 74LVTH244AD,118 pinout, 74LVTH244AD,118 application, or 74LVTH244AD,118 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.2 ns), overvoltage input tolerance, IOFF power-down behavior, and compatibility with TTL-level control signals in high-density PCB layouts.
Technical Context
This BiCMOS device implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low enable (1OE for Y0–Y3 group, 2OE for Y0–Y3 group). Outputs enter high-impedance state when respective OE is HIGH, enabling bidirectional bus sharing without contention.
Bus hold circuitry maintains valid logic states on unused inputs at VI = 0.8 V (LOW) or 2.0 V (HIGH), with IBHL/IBHH currents of ±75–150 μA at VCC = 3 V. IOFF protection limits leakage to ±100 μA during partial power-down, supporting live insertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.7 V to 3.6 V - supports stable operation across industrial-grade 3.3 V rail tolerances |
| Input voltage range | 0 V to 5.5 V - enables direct interface with 5 V TTL logic without level shifters |
| Output drive | +64 mA sink / –32 mA source - drives heavy capacitive loads or multiple CMOS inputs |
| Propagation delay | tPLH/tPHL ≤ 4.1 ns at VCC = 3.6 V - meets sub-5 ns timing for high-speed address/data buffering |
| Bus hold current | ±75 μA to ±150 μA - actively sustains logic state on floating inputs without external resistors |
| IOFF leakage | ±100 μA at VCC = 0 V - prevents back-driving during hot-swap or partial power-down |
| Operating temperature | –40 °C to +85 °C - qualified for industrial ambient environments |
Pinout & Package
74LVTH244AD,118 uses SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads, JEDEC MS-013 compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low enable inputs - independently disable Group 1 (Y0–Y3) or Group 2 (Y0–Y3) outputs |
| 2, 4, 6, 8 | 1A0–1A3 | Data inputs for first 4-bit buffer channel - routed to outputs 1Y0–1Y3 when 1OE = LOW |
| 11, 13, 15, 17 | 2A0–2A3 | Data inputs for second 4-bit buffer channel - routed to outputs 2Y0–2Y3 when 2OE = LOW |
| 12, 14, 16, 18 | 1Y0–1Y3 | 3-state outputs for first channel - high-impedance when 1OE = HIGH |
| 3, 5, 7, 9 | 2Y0–2Y3 | 3-state outputs for second channel - high-impedance when 2OE = HIGH |
| 10 | GND | Ground reference - common return for all I/O and supply paths |
| 20 | VCC | 3.3 V supply input - powers internal BiCMOS circuitry and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Dual 4-bit 3-state control | Independent 1OE/2OE pins allow selective channel isolation in multi-drop bus architectures |
| Overvoltage-tolerant inputs | Withstands up to 5.5 V regardless of VCC - eliminates need for external clamping diodes |
| Bus hold inputs | Internal weak keepers maintain logic state on unconnected A0–A3 pins - reduces BOM count and layout area |
| Live insertion support | IOFF circuitry blocks current flow when VCC = 0 V - enables safe hot-plug into powered backplanes |
| BiCMOS output stage | Combines bipolar speed and CMOS low static power - achieves 4.1 ns propagation with 64 mA drive |
Applications
| Backplane Data Routing | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Buffering address/data lines between CPU module and peripheral slots in modular rack systems. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer isolating shared bus segments during slot arbitration. Use Value: 5.5 V-tolerant inputs accept legacy 5 V control signals; tPZH ≤ 5.2 ns ensures deterministic bus release timing. | Use Scenario: Interfacing microcontroller GPIOs to relay driver banks requiring higher current drive. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer between low-drive MCU outputs and inductive loads. Use Value: +64 mA sink capability directly drives relay coils; bus hold prevents spurious activation during reset. |
| Memory Interface Isolation | Test Equipment Signal Conditioning |
Use Scenario: Isolating SRAM or Flash memory data buses from host controller during DMA transfers. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer enabling read/write direction control via OE signals. Use Value: Dual OE allows independent gating of upper/lower byte lanes; IOFF prevents backfeed during power sequencing. | Use Scenario: Conditioning digital stimulus signals in automated test equipment before applying to DUT. IC Role / Device Role / Timing Role: Signal integrity-preserving buffer with precise edge control and load driving. Use Value: Sub-5 ns propagation and <8 pF output capacitance minimize jitter and overshoot on 50 Ω transmission lines. |
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/–24 mA), 1.65–3.6 V supply, no bus hold | Requires external pull-ups on unused inputs; unsuitable for live-insertion due to missing IOFF | Select when cost sensitivity outweighs drive strength and bus hold requirements |
| 74ALVCH16244DGGR | 16-bit, 3.3 V only, higher speed (tPD ≤ 3.2 ns), no overvoltage tolerance | Not pin-compatible; requires redesign for 20-pin SO footprint; lacks 5 V input compatibility | Choose for higher channel density and tighter timing margins where 5 V interfacing is unnecessary |
Compared with SN74LVC244APWR and 74ALVCH16244DGGR, the 74LVTH244AD,118 uniquely combines 5.5 V input tolerance, ±64 mA drive, bus hold, and IOFF in a standard SO20 package-making it optimal for industrial backplane and mixed-voltage expansion interfaces where reliability under undefined conditions is critical.
Availability
74LVTH244AD,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, backplane data routing, memory interface isolation, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVTH244AD,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 discrete, logic, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, automotive, and computing markets.
The 74LVTH series targets high-speed, low-power 3.3 V logic interfacing in space-constrained industrial systems, emphasizing robustness against voltage transients, hot-swap capability, and simplified board design through integrated bus hold.
FAQ
What is the maximum input voltage the 74LVTH244AD,118 can tolerate?
The device accepts input voltages up to +7.0 V absolute maximum, but its overvoltage-tolerant operation is specified to +5.5 V under normal conditions. This allows direct connection to 5 V TTL outputs without level shifting while maintaining full functionality at VCC = 3.3 V.
Does the 74LVTH244AD,118 require external pull-up resistors on unused inputs?
No. The device integrates bus hold circuitry on all data inputs (1A0–1A3, 2A0–2A3), providing ±75–150 μA weak keeper current that maintains valid logic states without external components-reducing BOM cost and PCB area.
Can the 74LVTH244AD,118 be used in hot-swap applications?
Yes. Its IOFF circuitry limits power-off leakage to ±100 μA when VCC = 0 V, preventing back-current flow from powered buses into unpowered sections-enabling safe insertion and extraction in live backplane systems per JEDEC JESD78 Class II compliance.
What is the typical propagation delay for the 74LVTH244AD,118 at 3.3 V?
At VCC = 3.3 V and Tamb = 25 °C, typical propagation delay is 2.5 ns (tPLH) and 2.6 ns (tPHL) from input to output, with worst-case values of 4.1 ns across the full –40 °C to +85 °C operating range-ensuring predictable timing in high-speed digital interfaces.
74LVTH244AD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVTH
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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-SO
74LVTH244AD,118 FAQ
1.How can I place an order for 74LVTH244AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH244AD,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 74LVTH244AD,118 reliable?
The price and inventory of 74LVTH244AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH244AD,118 is usually 5 days.
3.What payment methods are accepted for 74LVTH244AD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH244AD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVTH244AD,118?
74LVTH244AD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH244AD,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 74LVTH244AD,118?
For technical support, including 74LVTH244AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH244AD,118 requirements.
6.How does Aetrix verify that 74LVTH244AD,118 is sourced from the original manufacturer or authorized distributors?
All 74LVTH244AD,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 74LVTH244AD,118 meets industry standards.
7.What is the process for return or replacement of 74LVTH244AD,118?
All 74LVTH244AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH244AD,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 74LVTH244AD,118 part is unused and in its original packaging.
Return procedure for 74LVTH244AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVTH244AD,118 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
