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Texas Instruments SN74ALVTH16240DLR
- Part No.:
- SN74ALVTH16240DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVTH16240DLR.pdf
- Description:
- IC BUFFER INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74ALVTH16240DLR from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for 2.5-V or 3.3-V VCC operation while supporting 5-V TTL-level inputs and outputs. It delivers ±32/64 mA drive at 3.3 V, features bus-hold circuitry to eliminate external pull resistors, and ensures high-impedance state during power-up/down to prevent bus conflicts. It is used in memory address buffering, clock distribution, and mixed-voltage bus interfacing in industrial control backplanes.
For engineers reviewing the SN74ALVTH16240DLR datasheet, SN74ALVTH16240DLR pinout, SN74ALVTH16240DLR application, or SN74ALVTH16240DLR equivalent, key selection criteria include its 3.3-V-compatible 16-bit 3-state drive capability, Auto3-State behavior above VCC + 0.5 V, bus-hold input retention, and DL-package thermal performance (θJA = 94°C/W).
Technical Context
This device implements four independent 4-bit inverting buffers, each with active-low output-enable (OE) control and symmetrical logic. Its Advanced BiCMOS Technology (ABT) enables low static power dissipation and high-speed switching with propagation delays as low as 1 ns (tPLH/tPHL) at 3.3 V and CL = 50 pF.
The architecture includes distributed VCC/GND pins to suppress high-speed switching noise, flow-through pinout for simplified PCB routing, and integrated bus-hold on all data inputs - eliminating need for external biasing. Power-off output disable supports live insertion in hot-swap systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports dual-supply 2.5-V/3.3-V systems and mixed-mode 5-V interface without level shifters |
| Output Drive (3.3 V) | –32 mA / +64 mA - sufficient to drive 50-Ω transmission lines or multiple CMOS/TTL loads directly |
| Propagation Delay | 1.0–3.3 ns (A→Y), 1.5–5.0 ns (OE→Y) - enables sub-300-MHz bus operation with tight timing margins |
| Bus-Hold Current | ±75 µA (VCC = 3 V) - actively retains valid logic states on floating inputs without external components |
| Power-Up High-Z | Active below VCC ≤ 1.2 V - prevents bus contention during supply ramp-up or brownout conditions |
| ESD Rating | 2000 V HBM, 1000 V CDM - meets industrial IEC 61000-4-2 system-level robustness requirements |
| Thermal Resistance (θJA) | 94°C/W (DL package) - defines maximum allowable power dissipation (≤350 mW) at 85°C ambient |
Pinout & Package
SN74ALVTH16240DLR uses a 48-pin Plastic Shrink Small-Outline (DL) package with 0.5-mm pitch, 12.4 mm × 6.0 mm body, and 1.2 mm max height. Pin layout follows flow-through architecture for minimal trace crossovers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable (per 4-bit group) | Independent control of four 4-bit output sections; OE high forces high-impedance state |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Data inputs (16 total) | All inputs feature bus-hold; no external pullup/pulldown required for unused lines |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Inverting buffered outputs (16 total) | Outputs sink/source up to 64 mA; Auto3-State disables output when VO > VCC + 0.5 V |
| VCC (Pins 7, 21, 34, 48) | Supply voltage | Distributed power pins reduce simultaneous switching noise and improve PDN stability |
| GND (Pins 4, 10, 18, 27, 32, 40) | Ground reference | Six GND pins provide low-inductance return paths for high-speed switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | Accepts 5-V inputs and drives 5-V loads while powered from 2.3–3.6 V - eliminates discrete level translators in legacy-to-modern bus bridges |
| Auto3-State protection | Automatically disables outputs when output voltage exceeds VCC + 0.5 V - prevents current backflow and latch-up during hot-plug or overvoltage events |
| Live-insertion support | Outputs disabled when VCC = 0 V - allows safe board replacement in powered-backplane systems without disrupting bus integrity |
| Flow-through pinout | Input and output pins arranged on opposite sides of package - reduces layer count and via density in high-density PCB layouts |
| Latch-up immunity | Exceeds 250 mA per JESD17 - ensures robust operation in noisy industrial environments with transient coupling |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving address lines from a 3.3-V microcontroller to multiple 5-V SRAM chips on a shared bus. IC Role / Device Role / Timing Role: Inverting 16-bit buffer with bus-hold and 3-state control isolates controller from bus loading and prevents floating addresses during reset. Use Value: Eliminates need for external pullups and level shifters while maintaining <3.3 ns propagation delay for synchronous access timing. |
Use Scenario: Fan-out of a 3.3-V system clock to multiple 5-V peripheral ICs with matched skew. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer providing TTL-compatible clock edges with controlled edge rates (10 ns/V). Use Value: Delivers ±64 mA drive into 50-Ω loads while maintaining <1.5 ns inter-output skew across all 16 outputs. |
| Mixed-Voltage Backplane Interface | Hot-Swap I/O Module |
Use Scenario: Interfacing a 2.5-V FPGA I/O bank to a 5-V legacy backplane in telecom line cards. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling safe communication across supply domains without isolation components. Use Value: Supports VI up to 7 V and VO up to 7 V in high-Z state - withstands backplane transients and rail mismatches. |
Use Scenario: Enabling/disabling data paths in modular PLC I/O slots during field replacement. IC Role / Device Role / Timing Role: 3-state driver with power-off disable and bus-hold ensures no glitches or contention during module insertion/removal. Use Value: Maintains high-impedance state down to VCC = 0 V and holds last valid input state - guarantees deterministic bus behavior pre- and post-power. |
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 | No bus-hold; lower drive (±24 mA @ 3.3 V); no Auto3-State; 3.3-V only (no 5-V tolerance) | Suitable for clean 3.3-V-only buses where external pull resistors are acceptable | Select when cost sensitivity outweighs mixed-voltage flexibility and bus-hold convenience |
| SN74ALVCH16244DLR | Non-inverting; no Auto3-State; same ABT process and 5-V tolerance but lacks bus-hold circuitry | Better for unidirectional address/data forwarding where polarity preservation is required | Choose when inverting logic is incompatible with system timing or protocol constraints |
Compared with SN74LVC16244ADLR and SN74ALVCH16244DLR, the SN74ALVTH16240DLR uniquely combines inverting logic, bus-hold, Auto3-State, and 5-V I/O tolerance - making it the only option among the three that fully supports legacy TTL interfacing without external components or design compromises.
Availability
SN74ALVTH16240DLR is available at Aetrix Electronics and suitable for industrial control backplanes, telecom line card interfaces, embedded memory subsystems, and hot-swap I/O modules requiring stable component supply across extended temperature ranges (–40°C to 85°C).
Supply support for SN74ALVTH16240DLR 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 expertise in high-reliability interface and bus technologies.
The SN74ALVTH16240DLR belongs to TI's ALVTH advanced logic family, engineered specifically for high-density, mixed-voltage bus interfacing in industrial, telecom, and computing infrastructure where signal integrity, power efficiency, and robustness are critical.
FAQ
What is the operating temperature range for the SN74ALVTH16240DLR?
The SN74ALVTH16240DLR is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated per the recommended operating conditions in the SCES138A datasheet, with full electrical specifications guaranteed across the span. The DL package's thermal resistance (θJA = 94°C/W) supports reliable operation within this envelope under typical PCB layout and airflow conditions. SN74ALVTH16240DLR does not support extended military-range operation like the SN54ALVTH16240 variant.
Does the SN74ALVTH16240DLR support 5-V input and output voltage levels?
Yes, the SN74ALVTH16240DLR supports 5-V input and output voltage levels while operating from a 2.3–3.6-V VCC. Input voltage range is specified to 5.5 V (VI = 0 to VCC or 5.5 V), and outputs tolerate up to 7 V in high-impedance or power-off states. This mixed-mode capability allows direct interfacing with legacy 5-V TTL systems without external level-shifting components. SN74ALVTH16240DLR maintains full functionality and timing compliance under these conditions.
How does the bus-hold feature work on the SN74ALVTH16240DLR?
The SN74ALVTH16240DLR integrates active bus-hold circuitry on all 16 data inputs, providing ±75 µA sustaining current (at VCC = 3 V) to retain the last-valid logic state when inputs float. This eliminates the need for external pullup or pulldown resistors in unterminated or sparsely loaded bus configurations. Bus-hold activation is automatic and requires no configuration; it operates independently of OE status and remains functional across the full operating temperature range. SN74ALVTH16240DLR's bus-hold strength is confirmed in the electrical characteristics tables for both 2.5-V and 3.3-V VCC conditions.
What is the meaning of "Auto3-State" in the SN74ALVTH16240DLR datasheet?
"Auto3-State" refers to an internal protection feature of the SN74ALVTH16240DLR that automatically places outputs in high-impedance mode when the output voltage exceeds VCC + 0.5 V. This prevents reverse current flow and potential damage during hot-plug events, bus contention, or overvoltage transients. Unlike standard 3-state control dependent solely on OE, Auto3-State operates independently and is always active. It is verified in the absolute maximum ratings and functional behavior sections of the SCES138A datasheet. SN74ALVTH16240DLR relies on this feature for robust operation in mixed-voltage and live-insertion applications.
Can the SN74ALVTH16240DLR be used in hot-swap applications?
Yes, the SN74ALVTH16240DLR is explicitly designed for hot-swap use: outputs are disabled when VCC = 0 V, and high-impedance state is guaranteed during power-up/down (VCC ≤ 1.2 V). Combined with Auto3-State and bus-hold, this ensures no bus contention, glitches, or latch-up during module insertion or removal. The DL package's thermal and mechanical specs align with IPC-7351 guidelines for hot-swap connectors. SN74ALVTH16240DLR has been deployed in telecom line cards and modular PLCs where field-replaceable I/O is required.
SN74ALVTH16240DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 2.3V ~ 2.7V, 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ALVTH16240DLR FAQ
1.How can I place an order for SN74ALVTH16240DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16240DLR 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 SN74ALVTH16240DLR reliable?
The price and inventory of SN74ALVTH16240DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16240DLR is usually 5 days.
3.What payment methods are accepted for SN74ALVTH16240DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVTH16240DLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALVTH16240DLR?
SN74ALVTH16240DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTH16240DLR 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 SN74ALVTH16240DLR?
For technical support, including SN74ALVTH16240DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16240DLR requirements.
6.How does Aetrix verify that SN74ALVTH16240DLR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16240DLR 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 SN74ALVTH16240DLR meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16240DLR?
All SN74ALVTH16240DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16240DLR, 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 SN74ALVTH16240DLR part is unused and in its original packaging.
Return procedure for SN74ALVTH16240DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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