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Texas Instruments 74LVTH16245ADLG4
- Part No.:
- 74LVTH16245ADLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74LVTH16245ADLG4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
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Product details
Overview
74LVTH16245ADLG4 from Texas Instruments is a 3.3-V ABT 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 3.3-V and 5-V systems. It features bus-hold circuitry, Ioff support for hot insertion, distributed VCC/GND pins, and operates down to 2.7 V supply. Used in mixed-voltage backplane interfaces and memory expansion subsystems.
For engineers reviewing the 74LVTH16245ADLG4 datasheet, 74LVTH16245ADLG4 pinout, 74LVTH16245ADLG4 application, or 74LVTH16245ADLG4 equivalent, key selection criteria include 3.3-V operation with 5-V tolerant I/O, dual-directional 16-bit flow-through architecture, bus-hold inputs eliminating external resistors, and SSOP-48 package compatibility with industrial temperature range (–40°C to 85°C).
Technical Context
The 74LVTH16245ADLG4 implements Advanced BiCMOS Technology (ABT) for low static power and high-speed switching at 3.3 V. Its dual-octal structure supports independent direction control per 8-bit port via DIR inputs and individual output-enable (OE) signals for A- and B-port isolation.
Logic-level translation is achieved through TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and 5-V-tolerant I/Os, enabling seamless interfacing between 3.3-V logic and legacy 5-V buses without level shifters. Power-up 3-state and Ioff circuitry ensure safe hot-plug operation by disabling outputs during power ramping or when VCC = 0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 2.7 V to 3.6 V - supports unregulated battery operation and ensures stable function across wide input variation |
| IOL / IOH Drive Strength | 64 mA / –32 mA at VCC = 3.3 V - sufficient to drive heavy capacitive loads and multiple TTL inputs |
| Propagation Delay (tPLH/tPHL) | 2.3 ns to 3.7 ns at VCC = 3.3 V, CL = 50 pF - enables high-speed bus communication up to ~200 MHz effective throughput |
| Input Voltage Tolerance | 0 V to 5.5 V - allows direct connection to 5-V systems without external level-shifting components |
| Bus-Hold Current (II(hold)) | ±75 µA at VCC = 3.6 V - actively maintains valid logic state on unused inputs, removing need for pullup/pulldown resistors |
| Power-Up 3-State Threshold | Active below 1.5 V VCC - prevents output contention during power sequencing and ensures safe initialization |
| Ioff Leakage | ±100 µA at VCC = 0 - blocks damaging backflow current when device is powered down in live systems |
Pinout & Package
74LVTH16245ADLG4 is housed in a 48-pin SSOP (Shrink Small Outline Package) with 0.5-mm pitch, JEDEC MO-153 compliant, body dimensions 12.6 mm × 7.9 mm × 1.75 mm max height, and moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (active-high) | Selects data flow direction per 8-bit port: DIR = L → B-to-A; DIR = H → A-to-B |
| 1OE, 2OE | Output enable input (active-low) | Disables corresponding port outputs into high-impedance state when high |
| A1–A8, B1–B8 (x2) | Bidirectional data I/O terminals | Each group of eight supports simultaneous 16-bit parallel transfer with bus-hold on all inputs |
| VCC, GND (x8 total) | Distributed power/ground | Minimizes switching noise and improves signal integrity via localized decoupling |
Key Features
| Feature | Design Value |
|---|---|
| 3.3-V ABT process technology | Enables low static power dissipation while maintaining TTL-compatible speed and drive strength |
| Mixed-mode signal operation | Supports 5-V input/output voltage levels with 3.3-V VCC - eliminates external level translators in hybrid-voltage systems |
| Flow-through pin architecture | Input and output pins arranged on opposite sides - simplifies PCB routing and reduces trace crosstalk |
| Hot-insertion support | Combines Ioff and power-up 3-state to prevent damage during live board insertion or removal |
| Bus-hold on all data inputs | Eliminates need for external pullup/pulldown resistors - reduces BOM count and layout area |
Applications
| Memory Expansion Interface | Industrial Backplane Bus |
|---|---|
Use Scenario: Connecting a 3.3-V microcontroller to legacy 5-V SRAM or Flash memory modules. IC Role / Device Role / Timing Role: Bidirectional voltage-translating transceiver managing address/data/control lines between mismatched logic families. Use Value: Enables direct interface without discrete level shifters, reducing component count and timing skew across 16-bit data paths. | Use Scenario: Interfacing modular I/O cards with a central 3.3-V host controller in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Isolating and translating control/status signals across hot-swappable slots using DIR/OE-controlled directionality. Use Value: Ensures glitch-free insertion/removal via Ioff and power-up 3-state, while bus-hold prevents floating inputs during card reseating. |
| Test Equipment Data Bus | Communications Module Bridge |
Use Scenario: Linking FPGA-based pattern generators to 5-V DUTs (device under test) in automated test systems. IC Role / Device Role / Timing Role: High-speed bidirectional buffer synchronizing test vectors and response capture across voltage domains. Use Value: Delivers sub-4 ns propagation delay and 64-mA drive to maintain signal fidelity over long backplane traces. | Use Scenario: Bridging UART/SPI peripherals operating at 5-V logic to a 3.3-V SoC in wireless gateway designs. IC Role / Device Role / Timing Role: Level-shifting transceiver handling control and status handshaking signals with precise timing control. Use Value: Supports reliable start/stop bit detection and clock synchronization despite voltage mismatch, thanks to TTL-compatible thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH16245ADGVRG4 | TVSOP-48 package (5.1 mm × 4.5 mm), thinner profile (1.2 mm max), same electrical specs and pinout | Better suited for space-constrained PCBs where height and footprint are critical | Select when board real estate or Z-height is constrained; requires updated land pattern and stencil design |
| 74LVT16245ADL | LVT family - lower drive (32 mA), no bus-hold, no Ioff, 3.3-V only I/O (not 5-V tolerant) | Applicable only in pure 3.3-V systems without hot-swap or floating-input concerns | Choose only if cost is primary and system lacks 5-V interfaces or hot-plug requirements |
Compared with SN74LVTH16245ADGVRG4, the 74LVTH16245ADLG4 offers identical functionality in a more robust SSOP package with higher thermal mass and easier manual handling; versus 74LVT16245ADL, it adds critical 5-V tolerance, bus-hold, and Ioff - essential for interoperability and reliability in mixed-voltage industrial environments.
Availability
74LVTH16245ADLG4 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and communications infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74LVTH16245ADLG4 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, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and broad application support.
The LVTH16245A product line targets mixed-voltage digital interconnect applications, specifically enabling robust, high-speed bidirectional data transfer between 3.3-V logic and legacy 5-V subsystems in industrial and instrumentation environments.
FAQ
What is the maximum operating temperature range for the 74LVTH16245ADLG4?
The 74LVTH16245ADLG4 is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade temperature range is confirmed in TI's official ordering information and applies specifically to the DL-package variants including 74LVTH16245ADLG4. Operation outside this range may result in parametric degradation or functional failure.
Does the 74LVTH16245ADLG4 support hot insertion, and how is it implemented?
Yes, the 74LVTH16245ADLG4 supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, preventing backflow current, and power-up 3-state holds outputs in high-impedance until VCC exceeds 1.5 V. These functions are inherent to the ABT process and verified in TI's Electrical Characteristics table under IOZPU/IOZPD and Ioff parameters.
Can the 74LVTH16245ADLG4 interface directly with 5-V logic without external level shifters?
Yes, the 74LVTH16245ADLG4 accepts input voltages up to 5.5 V and tolerates 5-V signals on both A and B ports while operating at VCC = 3.3 V. This 5-V-tolerant I/O capability is explicitly specified in the Recommended Operating Conditions table and enables direct connection to 5-V TTL buses without external components.
What is the purpose of the bus-hold feature on the 74LVTH16245ADLG4, and how does it affect design?
The bus-hold feature on the 74LVTH16245ADLG4 actively maintains unused or undriven inputs at their last-valid logic state using ±75 µA dynamic hold current. This eliminates the need for external pullup or pulldown resistors, reducing BOM cost, PCB area, and potential signal integrity issues caused by resistor parasitics.
Is the 74LVTH16245ADLG4 pin-compatible with other packages in the LVTH16245A family?
Yes, the 74LVTH16245ADLG4 (SSOP-48) shares identical pinout and signal mapping with SN74LVTH16245ADGGR (TSSOP-48) and SN74LVTH16245ADGVR (TVSOP-48), as confirmed by TI's terminal assignment diagrams and package drawings. Mechanical dimensions differ, but electrical and logical pin functions are fully interchangeable.
74LVTH16245ADLG4 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:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- 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
74LVTH16245ADLG4 FAQ
1.How can I place an order for 74LVTH16245ADLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH16245ADLG4 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 74LVTH16245ADLG4 reliable?
The price and inventory of 74LVTH16245ADLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH16245ADLG4 is usually 5 days.
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Once your 74LVTH16245ADLG4 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 74LVTH16245ADLG4?
For technical support, including 74LVTH16245ADLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH16245ADLG4 requirements.
6.How does Aetrix verify that 74LVTH16245ADLG4 is sourced from the original manufacturer or authorized distributors?
All 74LVTH16245ADLG4 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 74LVTH16245ADLG4 meets industry standards.
7.What is the process for return or replacement of 74LVTH16245ADLG4?
All 74LVTH16245ADLG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH16245ADLG4, 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 74LVTH16245ADLG4 part is unused and in its original packaging.
Return procedure for 74LVTH16245ADLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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