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Texas Instruments SN74LVTH162244DLR
- Part No.:
- SN74LVTH162244DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVTH162244DLR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:256
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Product details
Overview
SN74LVTH162244DLR from Texas Instruments is a 3.3-V ABT 16-bit buffer/driver with 3-state outputs, designed for mixed-mode signal interfacing between 3.3-V logic and 5-V systems. It features four independent 4-bit channels, bus-hold circuitry on all data inputs, integrated 22-Ω output series resistors, and supports hot insertion via Ioff and power-up 3-state. It is used in backplane interface, memory address/data buffering, and industrial control bus isolation.
For engineers reviewing the SN74LVTH162244DLR datasheet, SN74LVTH162244DLR pinout, SN74LVTH162244DLR application, or SN74LVTH162244DLR equivalent, key selection criteria include its 3.3-V VCC operation with 5-V tolerant inputs, 12-mA drive strength per output, 48-pin SSOP (DL) package, bus-hold functionality eliminating external resistors, and guaranteed operation down to 2.7 V supply.
Technical Context
The SN74LVTH162244DLR implements a flow-through pin architecture across four independent 4-bit buffer sections, each with symmetrical active-low output-enable (OE) controls (1OE–4OE). Its ABT (Advanced BiCMOS Technology) core delivers TTL-compatible output levels while operating from a 3.3-V supply, enabling seamless interfacing with legacy 5-V logic without level shifters.
Each output includes an integrated 22-Ω series resistor to suppress overshoot/undershoot, and all data inputs feature bus-hold circuitry that maintains valid logic states without external pullups. The device enters high-impedance during power-up/down when VCC is below 1.5 V, and supports hot insertion via Ioff protection and power-up 3-state behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 2.7 V to 3.6 V - enables stable operation under unregulated battery or noisy rail conditions |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to 5-V CMOS/TTL outputs without external level translation |
| Output Drive Strength | ±12 mA - sufficient to drive standard 50-pF loads at ≤4.8 ns propagation delay (VCC = 3.3 V) |
| Bus-Hold Current | ±75 µA minimum - actively holds unused inputs at last-valid logic state, removing need for external biasing |
| Output Series Resistance | 22 Ω (integrated) - reduces EMI and signal integrity issues without requiring discrete termination resistors |
| Power-Up 3-State | Active below 1.5 V VCC - prevents bus contention during power sequencing in multi-rail systems |
| Ioff Protection | ±100 µA max at VCC = 0 - blocks damaging current backflow when powered down in live backplane environments |
Pinout & Package
SN74LVTH162244DLR is housed in a 48-pin SSOP (Shrink Small Outline Package), DL variant, with 0.5-mm lead pitch, 12.6 mm × 6.2 mm body size, and 1.2 mm max height. Pin 1 is marked by a beveled corner or dot; leads are gull-wing, NIPDAU-finished, RoHS-compliant, and rated MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Data Inputs (16 total) | True-buffered inputs per 4-bit group; each has bus-hold for floating-input immunity |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | True Outputs (16 total) | 3-state, 22-Ω series-resistor-equipped outputs; sink/source up to 12 mA |
| 1OE–4OE | Active-Low Output Enables | Independent control per 4-bit group; OE low enables outputs, high disables to high-Z |
| VCC (Pins 7, 21, 34, 48) | Supply Power | Distributed VCC pins minimize switching noise and improve PSRR across wideband operation |
| GND (Pins 4, 10, 15, 27, 32, 43) | Ground Return | Multiple GND pins reduce ground bounce (VOLP < 0.8 V) and enhance signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage tolerance | 5-V input compatibility with 3.3-V VCC enables direct interconnection with legacy 5-V logic families |
| Integrated 22-Ω output resistors | Eliminates need for 16 external series resistors, reducing BOM count and PCB area in high-pin-count buffers |
| Bus-hold on all data inputs | Prevents floating-input metastability in unterminated stubs or disconnected traces, improving system robustness |
| Distributed VCC/GND pin layout | Reduces simultaneous switching noise (SSN) and improves high-speed signal fidelity on dense PCBs |
| Hot-insertion support | Ioff + power-up 3-state ensures safe insertion into live backplanes without disrupting bus traffic or damaging components |
Applications
| Backplane Interface Buffering | Memory Address/Data Bus Isolation |
|---|---|
Use Scenario: Isolating CPU address/data lines from peripheral expansion slots in modular industrial controllers. IC Role / Device Role / Timing Role: 16-bit bidirectional buffer providing level-shifted, noise-immune signal transmission between 3.3-V processor and 5-V peripheral cards. Use Value: Eliminates external level shifters and termination resistors while maintaining sub-5-ns propagation delay and bus-hold stability on unconnected slots. | Use Scenario: Driving SRAM or Flash memory address/data buses in embedded systems with mixed-voltage subsystems. IC Role / Device Role / Timing Role: Unidirectional driver buffering memory control signals from a 3.3-V SoC to 5-V memory devices with tight timing margins. Use Value: Integrated 22-Ω resistors suppress ringing on long traces; bus-hold prevents invalid read cycles during memory standby or reset transitions. |
| Industrial I/O Module Signal Conditioning | Test Equipment Digital Pattern Generation |
Use Scenario: Interfacing programmable logic controller (PLC) CPU modules with field I/O cards operating at different voltage domains. IC Role / Device Role / Timing Role: 3-state buffer enabling dynamic bus sharing between multiple I/O banks while preventing contention during hot-swap events. Use Value: Ioff protection and power-up 3-state ensure zero current injection during card insertion/removal, meeting IEC 61000-4-2 ESD and safety requirements. | Use Scenario: Generating precise digital stimulus patterns for ATE systems requiring clean, fast-switching 16-bit parallel outputs. IC Role / Device Role / Timing Role: High-fidelity pattern driver delivering sub-5-ns edge rates and minimal ground bounce (<0.8 V) into 50-pF loads. Use Value: Distributed VCC/GND and flow-through pinout simplify PCB layout and maintain signal integrity at >100-MHz toggle rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit buffer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | Lower drive (±24 mA), no integrated 22-Ω resistors, no bus-hold, 3.3-V only (no 5-V tolerant inputs) | Suitable for pure 3.3-V systems where external termination and pullups are acceptable | Select when cost sensitivity outweighs mixed-voltage flexibility and board space constraints |
| SN74ALVCH162244DGGR | Higher speed (tPD ≈ 3.2 ns), same 5-V tolerant inputs and bus-hold, but requires 2.3–3.6 V VCC (not 2.7–3.6 V) | Better for high-frequency memory interfaces where sub-4-ns timing is critical | Select when operating above 100 MHz and supply regulation permits tighter VCC range |
Compared with SN74LVC16244ADGGR and SN74ALVCH162244DGGR, the SN74LVTH162244DLR uniquely combines 5-V input tolerance, integrated 22-Ω termination, bus-hold, and 2.7-V minimum operation-making it optimal for ruggedized, mixed-voltage industrial backplanes where reliability and design simplicity are prioritized over peak speed.
Availability
SN74LVTH162244DLR is available at Aetrix Electronics and suitable for industrial control backplanes, memory interface isolation, PLC I/O modules, and automated test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74LVTH162244DLR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of heritage in high-reliability interface ICs.
The SN74LVTH162244DLR belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically for robust, mixed-voltage system interconnect in industrial, telecom, and computing infrastructure.
FAQ
What is the maximum input voltage the SN74LVTH162244DLR can tolerate?
The SN74LVTH162244DLR supports input voltages up to 5.5 V regardless of VCC level, enabling direct interfacing with 5-V TTL or CMOS outputs without external level-shifting circuitry. This 5-V tolerance is specified across the full operating temperature range and is enabled by its ABT process technology. Exceeding 5.5 V may risk damage, as absolute maximum input rating is 7 V only under clamp-current-limited conditions.
Does the SN74LVTH162244DLR require external pullup resistors on its inputs?
No, the SN74LVTH162244DLR does not require external pullup or pulldown resistors on its data inputs because it integrates active bus-hold circuitry on all 16 A-inputs. This circuitry maintains the last-valid logic state with ±75 µA holding current, eliminating floating-input uncertainty. TI explicitly advises against adding external resistors when bus-hold is enabled, as they may interfere with proper hold function and increase power consumption.
What is the purpose of the multiple VCC and GND pins on the SN74LVTH162244DLR?
The SN74LVTH162244DLR uses distributed VCC (pins 7, 21, 34, 48) and GND (pins 4, 10, 15, 27, 32, 43) connections to minimize simultaneous switching noise and improve power supply rejection. This layout reduces ground bounce (VOLP < 0.8 V at 3.3 V) and stabilizes VCC during high-speed toggling of multiple outputs, directly supporting clean signal integrity in dense, high-pin-count PCB layouts typical of backplane and memory interface designs.
Can the SN74LVTH162244DLR be used in hot-swap applications?
Yes, the SN74LVTH162244DLR is explicitly designed for hot-insertion applications. It incorporates Ioff circuitry that disables outputs and blocks reverse current flow when VCC = 0, and power-up 3-state logic that forces outputs into high-impedance during power ramp-up/down. These features prevent bus conflicts and protect upstream drivers during live card insertion into powered backplanes, meeting requirements for industrial and telecom hot-swap systems.
What package type and dimensions does the SN74LVTH162244DLR use?
The SN74LVTH162244DLR uses a 48-pin SSOP (Shrink Small Outline Package), designated DL, with 0.5-mm lead pitch, 12.6 mm × 6.2 mm body size, and maximum height of 1.2 mm. It is RoHS-compliant with NIPDAU lead finish, MSL Level-1 rating, and supplied in 1000-unit reels. Pin 1 is identified by a beveled corner or dot, and the package conforms to JEDEC MO-153 standards.
SN74LVTH162244DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74LVTH162244DLR FAQ
1.How can I place an order for SN74LVTH162244DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH162244DLR 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 SN74LVTH162244DLR reliable?
The price and inventory of SN74LVTH162244DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH162244DLR is usually 5 days.
3.What payment methods are accepted for SN74LVTH162244DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH162244DLR transactions.
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4.How is shipping managed for SN74LVTH162244DLR?
SN74LVTH162244DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH162244DLR 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 SN74LVTH162244DLR?
For technical support, including SN74LVTH162244DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH162244DLR requirements.
6.How does Aetrix verify that SN74LVTH162244DLR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH162244DLR 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 SN74LVTH162244DLR meets industry standards.
7.What is the process for return or replacement of SN74LVTH162244DLR?
All SN74LVTH162244DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH162244DLR, 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 SN74LVTH162244DLR part is unused and in its original packaging.
Return procedure for SN74LVTH162244DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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