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Texas Instruments SN74LVTH16240DLG4
- Part No.:
- SN74LVTH16240DLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVTH16240DLG4.pdf
- Description:
- IC BUFFER INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,341
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Product details
Overview
SN74LVTH16240DLG4 from Texas Instruments is a 3.3-V ABT 16-bit inverting buffer/driver with 3-state outputs, designed for low-voltage bus driving in mixed-signal systems. It features four independent 4-bit sections, active-low output-enable inputs (1OE–4OE), bus-hold circuitry on all data inputs, and supports hot insertion via Ioff and power-up 3-state functionality. It operates from –40°C to 85°C and is used in memory address buffering, clock distribution, and TTL-to-3.3-V bus interfacing.
For engineers reviewing the SN74LVTH16240DLG4 datasheet, SN74LVTH16240DLG4 pinout, SN74LVTH16240DLG4 application, or SN74LVTH16240DLG4 equivalent, key selection considerations include its 48-pin SSOP (DL) package, 3.3-V VCC with 5-V tolerant inputs, ±64 mA output drive capability, bus-hold input retention, and compatibility with hot-plug system architectures.
Technical Context
This device implements an Advanced BiCMOS Technology (ABT) architecture optimized for 3.3-V operation while maintaining 5-V input tolerance-enabling direct interfacing between 3.3-V logic and legacy 5-V buses. Its distributed VCC/GND pin layout minimizes high-speed switching noise, and flow-through pin arrangement simplifies PCB routing.
The SN74LVTH16240DLG4 integrates per-input bus-hold circuitry (±750 µA dynamic hold current), Ioff protection (±100 µA at VCC = 0), and power-up 3-state behavior that forces outputs into high-impedance below 1.5 V VCC. Each 4-bit section has symmetrical active-low OE control and inverting logic function (Y = A̅).
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 without functional degradation. |
| Input Voltage Tolerance | Up to 5.5 V - enables safe connection to 5-V TTL outputs without level-shifting circuitry. |
| IOL / IOH | 64 mA / –32 mA at VCC = 3 V - drives heavy capacitive loads (e.g., >50 pF) with fast edge rates and minimal VOL/VOL. |
| tPLH / tPHL | 2.2 ns / 2.7 ns typical at VCC = 3.3 V, CL = 50 pF - ensures sub-3-ns propagation delay for high-speed address/data buffering. |
| Bus-Hold Current | ±750 µA max - actively retains floating input states without external pull resistors, reducing BOM count and board space. |
| IOFF Leakage | ±100 µA at VCC = 0 - prevents backflow current during hot insertion or partial power-down, protecting upstream drivers. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems including communications infrastructure and industrial PLCs. |
Pinout & Package
SN74LVTH16240DLG4 is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 12.6 mm × 6.2 mm × 1.95 mm body, with 0.5-mm pitch, RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable control | Each independently enables/disables one 4-bit buffer section; tied high via pullup for default disable during power-up. |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Data inputs (16 total) | Inverting inputs with integrated bus-hold; retain last valid logic state when floating, eliminating external biasing. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Inverting buffered outputs (16 total) | 3-state outputs capable of ±64 mA sink/source; high-impedance when corresponding OE is high. |
| VCC (Pins 7, 21, 34, 48) | Power supply | Distributed VCC pins reduce simultaneous switching noise and improve PDN stability across wide bus widths. |
| GND (Pins 4, 10, 15, 28, 31, 39) | Ground reference | Seven GND pins provide low-inductance return paths, critical for signal integrity in high-speed 16-bit parallel interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting 3-state buffer architecture | Four independent 4-bit sections with dedicated OE lines enable flexible partitioning of 16-bit buses into smaller domains. |
| Mixed-mode voltage interface | 3.3-V VCC operation with 5-V tolerant inputs allows seamless integration into hybrid 3.3/5-V systems without translators. |
| Integrated bus-hold on all inputs | Eliminates need for 16 external pullup/pulldown resistors, reducing component count, layout complexity, and risk of floating nodes. |
| Hot-insertion support | Ioff and power-up 3-state ensure zero current backflow and automatic high-Z output during power sequencing mismatches. |
| Flow-through pinout | Input and output pins arranged linearly (e.g., A1→Y1, A2→Y2) minimizes trace crossovers and improves signal routing density on dense PCBs. |
| Distributed power/ground layout | Four VCC and seven GND pins suppress ground bounce (VOLP < 0.8 V) and maintain stable logic thresholds under full load switching. |
Applications
| Memory Address Buffering | Backplane Data Bus Interface |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a 3.3-V microcontroller to multiple SRAM or Flash devices operating at 5-V logic levels. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level translation, fanout expansion, and bus contention isolation during memory access cycles. Use Value: Eliminates need for discrete level shifters and pull resistors while ensuring clean setup/hold timing margins due to sub-3-ns propagation delay. |
Use Scenario: Interfacing a 3.3-V FPGA I/O bank to a legacy 5-V parallel backplane carrying control/status signals across multiple slots. IC Role / Device Role / Timing Role: Hot-pluggable bus driver enabling live insertion of daughter cards without disrupting active backplane communication. Use Value: Ioff protection prevents damage during card insertion/removal; bus-hold maintains valid logic on unconnected lines until firmware reinitializes. |
| Clock Distribution Network | Industrial I/O Expansion Module |
|
Use Scenario: Distributing a single 3.3-V clock source to eight synchronous peripherals requiring matched skew and low jitter. IC Role / Device Role / Timing Role: Low-skew inverting buffer with tsk(LH)/tsk(HL) ≤ 0.5 ns, minimizing clock phase deviation across fanout branches. Use Value: Symmetrical rise/fall propagation delays and distributed power delivery ensure tight inter-channel skew (<100 ps) for synchronous sampling. |
Use Scenario: Expanding digital I/O capacity of a programmable logic controller (PLC) CPU module using isolated 16-bit parallel I/O headers. IC Role / Device Role / Timing Role: Robust 3-state driver handling industrial noise environments with latch-up immunity >500 mA and ESD protection >2 kV HBM. Use Value: Withstands harsh EMI and transient coupling; bus-hold prevents spurious transitions during cable disconnection or sensor fault conditions. |
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 |
|---|---|---|---|
| SN74LVC16244ADLR | Non-inverting, lower drive (24 mA), no bus-hold, 3.3-V only I/O (no 5-V tolerance) | Suitable for pure 3.3-V systems where inversion is undesirable and external biasing is acceptable | Select when signal polarity preservation is required and system voltage rails are strictly 3.3 V. |
| SN74ALVCH16244VR | Non-inverting, higher speed (tPD ≈ 2.0 ns), 3.3-V I/O only, no bus-hold, different pinout | Better for high-frequency clock distribution in compact layouts where inversion is not needed | Choose for maximum speed in 3.3-V-only designs where board space permits redesign for non-inverting logic flow. |
Compared with SN74LVC16244ADLR and SN74ALVCH16244VR, the SN74LVTH16240DLG4 uniquely combines 5-V input tolerance, inverting logic, integrated bus-hold, and hot-insertion readiness-making it the only option among the three qualified for mixed-voltage industrial backplanes with floating input resilience.
Availability
SN74LVTH16240DLG4 is available at Aetrix Electronics and suitable for memory subsystems, industrial backplane interfaces, clock distribution networks, and FPGA I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVTH16240DLG4 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 connectivity technologies, with decades of expertise in high-reliability logic and interface solutions.
The SN74LVTH16240DLG4 belongs to TI's Widebus™ family of advanced bus-interface ICs, engineered specifically to enhance performance and density in 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters for industrial and communications equipment.
FAQ
What is the operating voltage range for SN74LVTH16240DLG4?
The SN74LVTH16240DLG4 operates over a supply voltage range of 2.7 V to 3.6 V, with guaranteed functionality at 3.3 V nominal. Its inputs tolerate up to 5.5 V regardless of VCC level, enabling interoperability with 5-V TTL systems without external level-shifting components. This specification is validated across the full industrial temperature range of –40°C to +85°C.
Does SN74LVTH16240DLG4 support hot insertion?
Yes, SN74LVTH16240DLG4 supports hot insertion through two complementary features: Ioff circuitry disables outputs when VCC = 0, preventing damaging current backflow, and power-up 3-state ensures outputs remain in high-impedance until VCC exceeds 1.5 V. These functions are fully characterized and tested per JEDEC standards, making SN74LVTH16240DLG4 suitable for live-backplane and modular system applications.
How does the bus-hold feature work on SN74LVTH16240DLG4?
The SN74LVTH16240DLG4 integrates active bus-hold circuitry on all 16 data inputs, which detects and reinforces the last valid logic state (high or low) when an input floats. It sources or sinks up to ±750 µA to maintain the state, eliminating the need for external pullup or pulldown resistors. This reduces BOM cost, saves PCB area, and prevents metastability in unterminated stubs or disconnected connectors.
What package type is used for SN74LVTH16240DLG4?
SN74LVTH16240DLG4 uses the SSOP-DL (Shrink Small-Outline Package) with 48 pins, 0.5-mm pitch, and dimensions of 12.6 mm × 6.2 mm × 1.95 mm. It features NiPdAu lead finish, RoHS compliance, and Moisture Sensitivity Level 1 (MSL-1) rating, allowing unlimited floor life and standard reflow profiles up to 260°C peak.
Can SN74LVTH16240DLG4 be used as a non-inverting buffer?
No, SN74LVTH16240DLG4 provides strictly inverting logic (Y = A̅) per buffer section. To achieve non-inverting behavior, two cascaded stages would be required-but this introduces additional propagation delay (~4.5 ns), increases power consumption, and occupies extra board space. For non-inverting applications, TI recommends alternatives such as SN74LVC16244A or SN74ALVCH16244, which are purpose-built non-inverting 16-bit buffers.
SN74LVTH16240DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 4
- 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:
- 48-SSOP
SN74LVTH16240DLG4 FAQ
1.How can I place an order for SN74LVTH16240DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH16240DLG4 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 SN74LVTH16240DLG4 reliable?
The price and inventory of SN74LVTH16240DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH16240DLG4 is usually 5 days.
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Once your SN74LVTH16240DLG4 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 SN74LVTH16240DLG4?
For technical support, including SN74LVTH16240DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH16240DLG4 requirements.
6.How does Aetrix verify that SN74LVTH16240DLG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVTH16240DLG4 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 SN74LVTH16240DLG4 meets industry standards.
7.What is the process for return or replacement of SN74LVTH16240DLG4?
All SN74LVTH16240DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH16240DLG4, 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 SN74LVTH16240DLG4 part is unused and in its original packaging.
Return procedure for SN74LVTH16240DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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