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Nexperia USA Inc. 74LVTH244ADB,112
- Part No.:
- 74LVTH244ADB,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVTH244ADB,112.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,069
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Product details
Overview
74LVTH244ADB,112 from Nexperia is a 3.3 V octal buffer/line driver with dual 3-state outputs, designed for bidirectional bus interfacing in high-speed digital systems. It operates across 2.7 V to 3.6 V, delivers ±32 mA/±64 mA drive capability, tolerates 5.5 V inputs, and features bus hold on all data inputs-enabling robust signal integrity in industrial control backplanes and memory expansion interfaces.
For engineers reviewing the 74LVTH244ADB,112 datasheet, 74LVTH244ADB,112 pinout, 74LVTH244ADB,112 application, or 74LVTH244ADB,112 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.2 ns), overvoltage-tolerant inputs, IOFF power-down behavior, and SO20 package compatibility with legacy 74-series layouts.
Technical Context
This BiCMOS device implements two independent 4-bit 3-state buffers controlled by active-low OE pins (1OE, 2OE), enabling selective isolation of two 4-bit data paths. Each output supports TTL-level interfacing and drives loads up to 64 mA low / 32 mA high while maintaining rail-to-rail input tolerance up to 5.5 V.
The integrated bus hold circuitry actively maintains logic state on unused inputs without external pull-ups, and IOFF functionality ensures near-zero leakage (< ±100 µA) when VCC = 0 V-critical for hot-swap and partial-power-down operation in modular systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Enables direct interface with 3.3 V LVTTL and mixed-voltage systems without level shifters. |
| Input Voltage Range | –0.5 V to +5.5 V - Supports 5 V-tolerant inputs for seamless connection to legacy TTL buses. |
| Output Drive | +64 mA / –32 mA - Sustains strong sink/source capability for driving terminated transmission lines or multiple CMOS loads. |
| Propagation Delay | tPLH/tPHL ≤ 4.1 ns @ 3.3 V - Ensures sub-5 ns timing margins in 100 MHz+ address/data bus applications. |
| Bus Hold Current | IBHL = 75–150 µA, IBHH = –150 to –75 µA - Actively retains logic state on floating inputs without external resistors. |
| IOFF Leakage | ±100 µA @ VCC = 0 V - Prevents back-driving and signal corruption during power sequencing or hot insertion. |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - Meets industrial-grade ESD robustness per JS-001/JS-002 standards. |
Pinout & Package
74LVTH244ADB,112 is packaged in SO20 (SOT163-1), a 20-pin plastic small outline package with 7.5 mm body width, 1.27 mm lead pitch, and standard JEDEC MS-013 footprint compatible with automated assembly and legacy PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls four outputs each; HIGH forces high-impedance OFF-state for bus isolation. |
| 2, 4, 6, 8 | 1A0–1A3 | Data inputs for first 4-bit buffer group; accept 5.5 V-tolerant signals regardless of VCC. |
| 11, 13, 15, 17 | 2A0–2A3 | Data inputs for second 4-bit buffer group; support independent enable control and bus hold. |
| 12, 14, 16, 18 | 1Y0–1Y3 | 3-state outputs for first group; driven only when 1OE = LOW; high-Z otherwise. |
| 3, 5, 7, 9 | 2Y0–2Y3 | 3-state outputs for second group; isolated from first group via separate OE control. |
| 10 | GND | Ground reference (0 V); required for stable biasing and noise immunity. |
| 20 | VCC | Positive supply (2.7–3.6 V); powers internal BiCMOS circuitry and defines logic thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| Octal 3-state buffering | Two independent 4-bit channels with dedicated OE pins enable flexible bus segmentation and load management. |
| 5.5 V overvoltage-tolerant inputs | Eliminates need for external level translators when interfacing with 5 V legacy peripherals or microcontrollers. |
| Integrated bus hold | Maintains defined logic state on unconnected inputs using internal feedback-no external pull-up/pull-down resistors required. |
| IOFF partial power-down | Prevents current flow through powered-off outputs, avoiding bus contention during power sequencing or hot-swap events. |
| Live insertion/extraction support | Robust clamping and IOFF behavior allow safe board replacement in powered-backplane systems without system shutdown. |
Applications
| Industrial Backplane Interface | Memory Expansion Module |
|---|---|
Use Scenario: Isolating CPU address/data bus from peripheral cards in modular PLC racks with shared backplane wiring. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer providing controlled signal routing between master and slave slots with precise enable timing. Use Value: Dual OE control allows staggered activation of card groups, reducing simultaneous switching noise and meeting <5 ns propagation delay requirements. | Use Scenario: Extending SRAM or Flash memory capacity on embedded controller boards where address lines must be shared across multiple devices. IC Role / Device Role / Timing Role: Address line driver with bus hold ensuring stable addressing during memory select transitions and power-up initialization. Use Value: 5.5 V input tolerance permits direct connection to 5 V memory chips; IOFF prevents backfeed during memory power-down sequences. |
| Legacy TTL System Upgrade | Hot-Swappable I/O Module |
Use Scenario: Replacing obsolete 74ACT244 in 3.3 V upgraded control systems while retaining existing 5 V sensor/actuator interfaces. IC Role / Device Role / Timing Role: Level-translating buffer bridging 3.3 V logic domain and 5 V analog I/O subsystems without discrete translators. Use Value: Guaranteed 5.5 V input tolerance and TTL-compatible thresholds eliminate redesign of sensor interface PCBs. | Use Scenario: Enabling field-replaceable I/O modules in factory automation controllers where modules are inserted/removed under power. IC Role / Device Role / Timing Role: Bus isolation gate with live-insertion support, managing signal integrity during mechanical mating/unmating transients. Use Value: IOFF and bus hold prevent glitches on shared bus during connector engagement; tPZL/tPHZ < 5.2 ns ensures fast recovery post-insertion. |
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 or IOFF | Suitable for low-power, non-hot-swap designs where external pull-ups are acceptable | Select when cost sensitivity outweighs robustness needs and 5 V tolerance is not required |
| 74ALVCH244PW | Higher speed (tPD ≤ 3.1 ns), same 3.3 V range, includes bus hold but no IOFF | Better for ultra-high-speed data paths where power-down isolation is secondary | Choose for timing-critical applications needing faster propagation but accepting reduced power sequencing safety |
Compared with SN74LVC244APWR and 74ALVCH244PW, the 74LVTH244ADB,112 uniquely combines 5.5 V input tolerance, IOFF, and bus hold-making it the only option among the three qualified for industrial hot-swap and mixed-voltage backplane use without supplemental circuitry.
Availability
74LVTH244ADB,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion modules, legacy TTL upgrades, and hot-swappable I/O modules requiring stable component supply, long-term lifecycle assurance, and SO20 footprint compatibility.
Supply support for 74LVTH244ADB,112 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 components for automotive, industrial, computing, consumer, and mobile applications.
The 74LVTH series targets high-speed, robust bus interface solutions for industrial and telecom infrastructure-designed specifically for noise-immune, mixed-voltage, and hot-plug-capable system architectures.
FAQ
What is the maximum input voltage the 74LVTH244ADB,112 can tolerate?
The device accepts input voltages from –0.5 V to +5.5 V, independent of VCC, enabling direct connection to 5 V logic families without level-shifting circuitry. This rating is validated per absolute maximum limits and applies across the full operating temperature range (–40 °C to +85 °C).
Does the 74LVTH244ADB,112 support hot insertion?
Yes-it supports live insertion and extraction due to integrated IOFF circuitry that disables output current flow when VCC = 0 V, combined with bus hold to maintain input states and robust ESD protection (>2000 V HBM). These features prevent bus contention and signal corruption during mechanical mating.
How does the bus hold function operate without external components?
Internal weak-feedback transistors actively pull floating inputs toward their last valid logic state, drawing 75–150 µA for LOW and –75 to –150 µA for HIGH. This eliminates external pull-up/down resistors while maintaining noise margin and preventing metastability in unterminated traces.
What is the difference between 74LVTH244A and 74LVT244A variants?
The 'H' suffix denotes enhanced drive strength: 74LVTH244A delivers +64 mA sink / –32 mA source versus +32 mA / –32 mA for 74LVT244A. Both share identical pinout, bus hold, IOFF, and 5.5 V input tolerance-but LVTH is specified for higher fan-out and heavier capacitive loads.
74LVTH244ADB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVTH
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-SSOP
74LVTH244ADB,112 FAQ
1.How can I place an order for 74LVTH244ADB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH244ADB,112 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 74LVTH244ADB,112 reliable?
The price and inventory of 74LVTH244ADB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH244ADB,112 is usually 5 days.
3.What payment methods are accepted for 74LVTH244ADB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH244ADB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVTH244ADB,112?
74LVTH244ADB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH244ADB,112 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 74LVTH244ADB,112?
For technical support, including 74LVTH244ADB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH244ADB,112 requirements.
6.How does Aetrix verify that 74LVTH244ADB,112 is sourced from the original manufacturer or authorized distributors?
All 74LVTH244ADB,112 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 74LVTH244ADB,112 meets industry standards.
7.What is the process for return or replacement of 74LVTH244ADB,112?
All 74LVTH244ADB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH244ADB,112, 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 74LVTH244ADB,112 part is unused and in its original packaging.
Return procedure for 74LVTH244ADB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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