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Texas Instruments SN74LVTH162541DL
- Part No.:
- SN74LVTH162541DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVTH162541DL.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,769
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Product details
Overview
SN74LVTH162541DL from Texas Instruments is a 3.3-V ABT 16-bit noninverting buffer/driver with 3-state outputs, designed for mixed-mode interfacing between 3.3-V logic and 5-V systems. It features dual 8-bit sections with independent output-enable controls (1OE1/1OE2 and 2OE1/2OE2), 22-Ω integrated series output resistors, and bus-hold on all data inputs. Used in backplane interface, memory address buffering, and industrial control I/O expansion.
For engineers reviewing the SN74LVTH162541DL datasheet, SN74LVTH162541DL pinout, SN74LVTH162541DL application, or SN74LVTH162541DL equivalent, key selection criteria include its 3.3-V operation with 5-V tolerant inputs, hot-insertion support via Ioff and power-up 3-state, ±12 mA drive strength, bus-hold functionality, and SSOP-48 (DL) package compatibility with legacy 380-mil footprint designs.
Technical Context
This device implements Advanced BiCMOS Technology (ABT) to achieve low static power dissipation while maintaining TTL-compatible output swing and drive capability at 3.3-V VCC. Each 8-bit section uses two active-low output-enable inputs - both must be low for corresponding Y outputs to pass A inputs; either high forces high-impedance state.
The architecture includes distributed VCC/GND pins to suppress switching noise, flow-through pinout for optimized PCB routing, and internal 22-Ω series resistors per output to minimize overshoot/undershoot without external termination. Bus-hold circuitry actively maintains valid logic levels on unused inputs, eliminating external pullup/pulldown resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery operation down to 2.7 V while maintaining full functionality |
| IOL / IOH | ±12 mA - drives standard TTL loads directly without external buffers or level shifters |
| Input Voltage Tolerance | Up to 5.5 V - enables direct connection to 5-V buses without input clamping diodes or voltage translators |
| tPLH / tPHL | Typ. 2.9 ns at VCC = 3.3 V - ensures sub-5 ns propagation delay for high-speed address/data buffering |
| Bus-Hold Current | ±750 µA max - actively holds floating inputs at valid logic levels, preventing metastability in unterminated stubs |
| Power-Up 3-State | Active below 1.5 V VCC - prevents output contention during power ramp-up or brownout conditions |
| Ioff Support | <±100 µA at VCC = 0 - blocks backflow current during hot insertion, protecting powered-backplane circuits |
Pinout & Package
SN74LVTH162541DL is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 380-mil body width, 0.5-mm lead pitch, 1.2-mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Active-low output enable (per 8-bit section) | Both enables per section must be low to activate outputs; any high forces high-Z - enables independent control of two 8-bit channels |
| 1A1–1A8, 2A1–2A8 | Data inputs | Noninverting inputs for respective 8-bit sections; bus-hold circuitry maintains state when floating |
| 1Y1–1Y8, 2Y1–2Y8 | 3-state buffered outputs | Drive-strength-limited (±12 mA), 22-Ω series-resistor-equipped outputs reduce EMI and eliminate need for external termination |
| VCC (Pins 7, 18, 29, 40) | Supply voltage | Distributed power pins minimize simultaneous switching noise and improve PDN stability across wide bus |
| GND (Pins 4, 10, 15, 21, 26, 31, 34, 42) | Ground reference | Eight dedicated ground pins provide low-inductance return paths for all 16 outputs and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant inputs with 3.3-V VCC enable seamless interfacing between legacy 5-V peripherals and modern low-voltage controllers |
| Integrated 22-Ω output series resistors | Eliminate need for discrete termination resistors, reducing BOM count and PCB area while controlling edge rates |
| Hot-insertion support | Ioff and power-up 3-state prevent damage and bus contention when inserting into live backplanes or hot-swap slots |
| Bus-hold on all data inputs | Removes requirement for external pullup/pulldown resistors on unterminated or sparsely loaded data lines |
| Flow-through pinout architecture | Input-to-output signal path flows left-to-right across package, simplifying layer stack routing and minimizing trace crossovers |
Applications
| Backplane Data Buffering | Memory Address Expansion |
|---|---|
Use Scenario: Isolating and driving wide parallel data buses across long traces on industrial backplanes with mixed 3.3-V/5-V subsystems. IC Role / Device Role / Timing Role: Noninverting 16-bit buffer providing level translation, noise isolation, and fanout amplification between controller and peripheral modules. Use Value: 5-V-tolerant inputs accept legacy module signals; 22-Ω series resistors suppress reflections on 10+ cm traces; dual OE control allows staggered enable sequencing. | Use Scenario: Expanding address space in microcontroller-based PLCs by buffering extended address lines to external SRAM or FPGA configuration memory. IC Role / Device Role / Timing Role: Low-latency address driver ensuring setup/hold timing margins are maintained across multi-layer PCBs with varying trace lengths. Use Value: Sub-5 ns propagation delay preserves timing budget; bus-hold prevents invalid addresses during reset or partial initialization; 12 mA drive sustains signal integrity into multiple load capacitances. |
| Industrial I/O Module Interface | Legacy System Bus Bridge |
Use Scenario: Interfacing isolated digital I/O cards (e.g., optocoupled DI/DO) to a 3.3-V host MCU while tolerating 5-V field-side transients. IC Role / Device Role / Timing Role: Bidirectional-capable buffer (with OE-controlled direction) translating logic levels and providing current gain for driving opto-LEDs or reading open-collector sensors. Use Value: Ioff protection prevents current leakage into unpowered I/O cards; power-up 3-state avoids glitches during cold start; ±12 mA drive directly sources/sinks opto-LEDs. | Use Scenario: Connecting modern ARM-based controllers to legacy ISA or PC/104 peripheral cards requiring 5-V signaling and TTL-compatible drive. IC Role / Device Role / Timing Role: Voltage-level translator and bus repeater enabling interoperability without custom level-shifter ICs or discrete transistor arrays. Use Value: Eliminates need for separate level shifters and bus buffers; 22-Ω resistors dampen ringing on long ISA bus traces; dual OE groups allow selective channel activation during DMA cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | Lower drive (±24 mA), no integrated series resistors, no bus-hold, 1.65–3.6 V VCC range | Suitable for clean, short-trace 3.3-V-only systems; requires external termination and pullups | Select when cost sensitivity outweighs mixed-voltage flexibility and board-area savings from integrated features |
| SN74ALVCH162541GR | Higher speed (tPD typ 2.1 ns), 1.65–3.6 V VCC, no 5-V tolerance, no bus-hold, no integrated resistors | Better for high-frequency DDR control buses where 5-V compatibility is unnecessary | Choose for maximum speed in pure 3.3-V domains where external termination and biasing are acceptable |
Compared with SN74LVC16244ADGGR and SN74ALVCH162541GR, the SN74LVTH162541DL uniquely combines 5-V input tolerance, integrated 22-Ω resistors, bus-hold, and hot-insertion support - making it the only option among the three that eliminates external components while enabling robust mixed-voltage system integration.
Availability
SN74LVTH162541DL is available at Aetrix Electronics and suitable for industrial I/O modules, backplane data buffering, and memory address expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SN74LVTH162541DL 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 delivering analog and embedded processing solutions, with over 90 years of innovation in high-reliability logic, interface, and power management ICs.
The SN74LVTH162541DL belongs to TI's Widebus™ family of advanced 3.3-V ABT logic devices, engineered specifically for mixed-voltage system interfacing, hot-swap infrastructure, and noise-sensitive industrial backplane applications.
FAQ
What is the operating temperature range for the SN74LVTH162541DL?
The SN74LVTH162541DL is characterized for operation from –40°C to +85°C, meeting industrial-grade thermal requirements. This range is explicitly specified in the official TI datasheet SCBS690F and confirmed across all DL-package ordering variants including SN74LVTH162541DL and SN74LVTH162541DLR.B. The device maintains full electrical performance-including propagation delay, drive strength, and bus-hold functionality-across this entire range.
Does the SN74LVTH162541DL support hot insertion, and how is it implemented?
Yes, the SN74LVTH162541DL supports hot insertion via two complementary mechanisms: Ioff circuitry disables outputs when VCC = 0, preventing damaging backflow current into powered systems; and power-up 3-state forces outputs into high-impedance during VCC ramp-up (below 1.5 V). Both features are silicon-verified and documented in the TI datasheet under "Hot-Insertion Applications" and "Power-Up 3-State" sections.
Can the SN74LVTH162541DL interface directly with 5-V logic inputs while powered at 3.3 V?
Yes, the SN74LVTH162541DL accepts input voltages up to 5.5 V while operating at VCC = 2.7–3.6 V, enabling direct connection to 5-V TTL or CMOS outputs without level-shifting circuitry. This 5-V tolerance is guaranteed per Absolute Maximum Ratings and validated in Recommended Operating Conditions, with VIH = 2.0 V and VIL = 0.8 V thresholds compatible with standard TTL logic levels.
What is the purpose of the integrated 22-Ω series resistors on the SN74LVTH162541DL outputs?
The integrated 22-Ω series resistors on each SN74LVTH162541DL output reduce signal overshoot and undershoot caused by transmission-line effects on PCB traces, eliminating the need for external termination resistors. This feature is explicitly stated in the TI datasheet FEATURES section and verified by measured VOLP < 0.8 V at VCC = 3.3 V, directly improving signal integrity in medium-length (5–15 cm) parallel bus layouts.
How does bus-hold functionality work on the SN74LVTH162541DL, and what benefit does it provide?
Bus-hold circuitry on the SN74LVTH162541DL actively maintains the last-valid logic state on unused or floating data inputs using weak feedback transistors, with hold current up to ±750 µA. This eliminates external pullup/pulldown resistors, reduces BOM cost, prevents metastability in unterminated stubs, and is confirmed in the Electrical Characteristics table under II(hold) parameter testing conditions.
SN74LVTH162541DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- 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
SN74LVTH162541DL FAQ
1.How can I place an order for SN74LVTH162541DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH162541DL 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 SN74LVTH162541DL reliable?
The price and inventory of SN74LVTH162541DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH162541DL is usually 5 days.
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SN74LVTH162541DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH162541DL 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 SN74LVTH162541DL?
For technical support, including SN74LVTH162541DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH162541DL requirements.
6.How does Aetrix verify that SN74LVTH162541DL is sourced from the original manufacturer or authorized distributors?
All SN74LVTH162541DL 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 SN74LVTH162541DL meets industry standards.
7.What is the process for return or replacement of SN74LVTH162541DL?
All SN74LVTH162541DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH162541DL, 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 SN74LVTH162541DL part is unused and in its original packaging.
Return procedure for SN74LVTH162541DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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