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Texas Instruments 74LVTH162245DLRG4
- Part No.:
- 74LVTH162245DLRG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74LVTH162245DLRG4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,134
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Product details
Overview
74LVTH162245DLRG4 from Texas Instruments is a 3.3-V ABT 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for mixed-mode interfacing between 3.3-V logic and 5-V systems. It supports bidirectional data flow (A↔B), features bus-hold on all I/Os, integrated 22-Ω series resistors on A-port outputs, and operates from 2.7 V to 3.6 V. Used in backplane interface, memory expansion, and FPGA-to-ASIC interconnect applications.
For engineers reviewing the 74LVTH162245DLRG4 datasheet, 74LVTH162245DLRG4 pinout, 74LVTH162245DLRG4 application, or 74LVTH162245DLRG4 equivalent, key selection criteria include its 48-pin SSOP (DL) package, ±12 mA A-port / ±64 mA B-port drive capability, 3.5 ns typical propagation delay at 3.3 V, hot-insertion support via Ioff and power-up 3-state, and bus-hold elimination of external pull resistors.
Technical Context
The 74LVTH162245DLRG4 implements a dual-octal transceiver architecture with independent direction-control (DIR) and output-enable (OE) inputs per 8-bit section. Its ABT (Advanced BiCMOS Technology) process enables TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V) while operating at 3.3-V VCC, supporting true 5-V-tolerant I/O without level shifters.
It integrates distributed VCC/GND pins and flow-through pinout to minimize switching noise and simplify PCB layout. The device enters high-impedance state during power-up/down when VCC < 1.5 V, and uses active bus-hold circuitry (±75 µA hold current at 3.6 V) to maintain valid logic states on undriven inputs - eliminating external biasing components.
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 |
| IOH/IOL (A port) | –12 mA / +12 mA - sufficient to drive standard TTL loads directly without external buffers |
| IOH/IOL (B port) | –32 mA / +64 mA - higher drive strength for driving heavier capacitive buses or longer traces |
| tPLH/tPHL (A→B) | 2.2 ns to 3.3 ns @ 3.3 V - enables high-speed data transfer in 100+ MHz system buses |
| Bus-Hold Current | ±75 µA @ VCC = 3.6 V - actively maintains logic state on floating inputs, preventing metastability |
| VOL (B port, IOL = 64 mA) | 0.55 V max @ VCC = 3.6 V - ensures robust low-level margin under full load conditions |
| Input Voltage Tolerance | 0 V to 5.5 V - allows direct connection to 5-V peripherals without clamping diodes or translators |
Pinout & Package
74LVTH162245DLRG4 is packaged in a 48-pin SSOP (Shrink Small-Outline Package), DL variant, with 0.635 mm lead pitch and 12.6 mm × 6.1 mm body size. Pin numbering follows standard JEDEC top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | High = A→B data flow; Low = B→A data flow; enables bidirectional bus arbitration |
| 1OE, 2OE | Output enable input (active-low) | Low = enable outputs; High = force both A and B ports into high-impedance isolation mode |
| 1A1–1A8, 2A1–2A8 | A-port data inputs/outputs | Noninverting transceiver I/O with 22-Ω series termination; source/sink up to 12 mA |
| 1B1–1B8, 2B1–2B8 | B-port data inputs/outputs | Noninverting transceiver I/O; source/sink up to 32 mA (high) / 64 mA (low) |
| VCC (Pins 7, 18, 29, 40) | Power supply | Distributed VCC pins reduce simultaneous switching noise and improve PDN stability |
| GND (Pins 4, 11, 22, 33, 44) | Ground reference | Five GND pins provide low-inductance return paths for high-speed switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant I/O with 3.3-V VCC enables direct interfacing between legacy 5-V and modern low-voltage subsystems |
| Integrated 22-Ω series resistors (A port) | Eliminates need for external source-series termination, reducing BOM count and board area |
| Hot-insertion support | Ioff and power-up 3-state prevent backdrive current and bus contention during live insertion |
| Active bus-hold circuitry | Maintains valid logic levels on unused or unterminated inputs - removes requirement for external pullup/pulldown resistors |
| Distributed VCC/GND pin layout | Minimizes ground bounce (VOLP < 0.8 V) and power rail collapse during high-speed switching |
Applications
| Backplane Interfacing | FPGA-to-ASIC Communication |
|---|---|
Use Scenario: Connecting multiple slot cards with differing voltage domains (e.g., 5-V legacy modules to 3.3-V controller card) across a shared parallel bus. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus buffer that isolates domains while preserving signal integrity and timing margins. Use Value: Enables interoperability without discrete level shifters; bus-hold prevents floating lines during hot-swap events. | Use Scenario: Routing wide data paths (e.g., 16-bit AXI or Avalon-MM interfaces) between Xilinx Artix FPGA and custom ASIC with different I/O standards. IC Role / Device Role / Timing Role: Low-latency, flow-through transceiver providing deterministic 3.5 ns A→B propagation delay and skew-controlled routing. Use Value: Distributed power/ground pins and 22-Ω A-port termination reduce jitter and overshoot, meeting setup/hold timing closure. |
| Memory Expansion Interface | Industrial Control Backplane |
Use Scenario: Extending address/data bus from microcontroller to external SRAM or Flash memory operating at 5-V logic levels. IC Role / Device Role / Timing Role: Direction-controlled transceiver managing read/write data flow between 3.3-V MCU and 5-V memory devices. Use Value: 64 mA B-port sink current drives heavy memory bus capacitance; 5.5-V input tolerance avoids damage from memory-side overshoot. | Use Scenario: Isolating programmable logic controller (PLC) CPU module from field I/O modules with varying supply voltages and EMI exposure. IC Role / Device Role / Timing Role: Robust 3-state bus isolator with latch-up immunity (>500 mA) and ESD protection (2000-V HBM). Use Value: Ioff disables outputs during power-down, preventing backfeed into powered-down modules - critical for modular maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADLR | Lower drive (24 mA B-port), no bus-hold, 1.65–3.6 V VCC range, LVC logic family | Lacks 5-V-tolerant inputs; requires external pull resistors; suited for pure 3.3-V or lower-voltage systems | Select when cost sensitivity outweighs mixed-voltage needs and external biasing is acceptable |
| 74ALVC16245DGG | Higher speed (tPD ≈ 2.8 ns), 1.65–3.6 V VCC, no integrated series resistors or bus-hold | No 5-V tolerance; requires external termination and biasing; optimized for minimal propagation delay in 3.3-V-only designs | Choose for highest-speed 3.3-V bus extension where layout space permits external components |
Compared with SN74LVC16245ADLR and 74ALVC16245DGG, the 74LVTH162245DLRG4 uniquely combines 5-V-tolerant I/O, bus-hold, and integrated A-port termination - making it the only option among the three qualified for mixed-voltage hot-plug systems without external support circuitry.
Availability
74LVTH162245DLRG4 is available at Aetrix Electronics and suitable for industrial control backplanes, FPGA-based prototyping platforms, and memory expansion subsystems requiring stable component supply across extended temperature ranges (–40°C to 85°C) and long production lifecycles.
Supply support for 74LVTH162245DLRG4 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 and widebus technologies.
The 74LVTH162245DLRG4 belongs to TI's LVTH (Low-Voltage Transistor-Transistor Logic) family, engineered specifically for robust mixed-signal interfacing in industrial, telecom, and computing infrastructure where voltage domain bridging and hot-swap resilience are mandatory.
FAQ
What is the maximum operating temperature range for the 74LVTH162245DLRG4?
The 74LVTH162245DLRG4 is rated for operation from –40°C to +85°C ambient temperature, matching the commercial-grade SN74LVTH162245 specification. This range is validated per TI's recommended operating conditions and supported by thermal impedance (θJA = 63°C/W) and junction temperature limits in the datasheet.
Does the 74LVTH162245DLRG4 support hot insertion, and how is it implemented?
Yes, the 74LVTH162245DLRG4 supports hot insertion via two dedicated features: Ioff circuitry disables outputs when VCC = 0 V, preventing damaging back-current flow; and power-up 3-state forces outputs into high-impedance during power ramp-up. Both mechanisms are inherent to the device's silicon design and require no external configuration.
Can the 74LVTH162245DLRG4 interface directly with 5-V logic without external level shifters?
Yes - the 74LVTH162245DLRG4 accepts input voltages up to 5.5 V while operating at 3.3-V VCC, and its outputs are TTL-compatible. This 5-V-tolerant I/O capability is explicitly specified in the Absolute Maximum Ratings and Recommended Operating Conditions tables, enabling direct connection to 5-V peripherals.
What is the purpose of the 22-Ω series resistors on the A-port outputs of the 74LVTH162245DLRG4?
The 22-Ω series resistors integrated on the A-port outputs of the 74LVTH162245DLRG4 suppress transmission-line reflections and reduce overshoot/undershoot on PCB traces. They eliminate the need for discrete source-series termination resistors, simplifying layout and reducing component count in high-speed bus designs.
How does bus-hold functionality work on the 74LVTH162245DLRG4, and when should it be used?
Bus-hold circuitry on the 74LVTH162245DLRG4 actively maintains the last-valid logic state on undriven or floating inputs using ±75 µA dynamic hold current. It is enabled by default and eliminates external pullup/pulldown resistors - ideal for sparing I/O pins and reducing static power in partially populated bus configurations.
74LVTH162245DLRG4 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:
- Obsolete
- 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:
- 12mA, 12mA; 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
74LVTH162245DLRG4 FAQ
1.How can I place an order for 74LVTH162245DLRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH162245DLRG4 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 74LVTH162245DLRG4 reliable?
The price and inventory of 74LVTH162245DLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH162245DLRG4 is usually 5 days.
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74LVTH162245DLRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH162245DLRG4 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 74LVTH162245DLRG4?
For technical support, including 74LVTH162245DLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH162245DLRG4 requirements.
6.How does Aetrix verify that 74LVTH162245DLRG4 is sourced from the original manufacturer or authorized distributors?
All 74LVTH162245DLRG4 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 74LVTH162245DLRG4 meets industry standards.
7.What is the process for return or replacement of 74LVTH162245DLRG4?
All 74LVTH162245DLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH162245DLRG4, 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 74LVTH162245DLRG4 part is unused and in its original packaging.
Return procedure for 74LVTH162245DLRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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