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Texas Instruments SN74ALVTH162245LR
- Part No.:
- SN74ALVTH162245LR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVTH162245LR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,904
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Product details
Overview
SN74ALVTH162245LR from Texas Instruments is a 16-bit noninverting bus transceiver with 3-state outputs, designed for 2.5-V/3.3-V VCC operation and mixed-mode 5-V interface compatibility. It supports bidirectional data flow between A and B buses via DIR control, features integrated bus-hold circuitry, and delivers B-port drive up to –32/64 mA at 3.3 V - enabling robust signal integrity in high-speed backplane and memory interface applications.
For engineers reviewing the SN74ALVTH162245LR datasheet, SN74ALVTH162245LR pinout, SN74ALVTH162245LR application, or SN74ALVTH162245LR equivalent, this page provides verified technical context, validated package mapping (DL package, 48-pin SSOP), confirmed hot-insertion support via Ioff and power-up 3-state, and real-world design meaning for key specs including VOLP < 0.8 V, 30-Ω series output resistance on A port, and CL = 50 pF switching performance.
Technical Context
The SN74ALVTH162245LR implements a dual-octal architecture with independent DIR and OE controls per 8-bit section, supporting simultaneous or segregated A↔B data routing. Its Advanced BiCMOS Technology (ABT) enables low static power dissipation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V at 3.3 V) and 5-V-tolerant I/Os (VI up to 5.5 V).
Integrated bus-hold circuitry eliminates external pullup/pulldown resistors by sustaining valid logic levels on floating inputs (IBHL = 75 µA, IBHH = –75 µA at VCC = 3 V), and distributed VCC/GND pins plus flow-through pinout minimize high-speed switching noise and simplify PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports both 2.5-V and 3.3-V system rails without level-shifting circuitry |
| B-port Drive (IOL/IOH) | –32/64 mA at 3.3 V - drives heavy capacitive loads (e.g., multi-drop buses) with fast edge rates |
| A-port Series Resistance | 30 Ω integrated - suppresses overshoot/undershoot without external termination resistors |
| tPHL/tPLH (A→B) | 0.5 ns min / 3.1 ns max at CL = 50 pF - ensures sub-4 ns propagation for timing-critical interconnects |
| Ioff (Power-Down Isolation) | ±100 µA at VCC = 0 - prevents damaging backflow current during hot insertion or partial power-down |
| Bus-Hold Sustaining Current | IBHL = 75 µA / IBHH = –75 µA - maintains stable logic states on unused inputs without external biasing |
| VOLP (Ground Bounce) | < 0.8 V at VCC = 3.3 V - reduces noise coupling into adjacent signals and power domains |
Pinout & Package
SN74ALVTH162245LR is housed in a 48-pin SSOP (DL) package with 0.5-mm pitch, 7.9 mm × 12.5 mm body size, and 1.2 mm max height - optimized for space-constrained industrial and telecom PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (active-high) | Selects data flow direction per 8-bit section: DIR = L → B-to-A; DIR = H → A-to-B |
| 1OE, 2OE | Output enable input (active-low) | Disables both A and B ports of respective section into high-impedance state when high |
| 1A1–1A8, 2A1–2A8 | A-side data I/O terminals | Noninverting inputs/outputs with 30-Ω series resistance; tolerate 5-V signals with 2.3–3.6-V VCC |
| 1B1–1B8, 2B1–2B8 | B-side data I/O terminals | Noninverting inputs/outputs; higher drive strength (–32/64 mA) for driving stubbed or long traces |
| VCC, GND | Power supply and ground | Distributed across 8 VCC and 8 GND pins - lowers simultaneous switching noise (SSN) and improves PDN stability |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant I/Os with 2.3–3.6-V VCC - enables direct interfacing between legacy 5-V logic and modern low-voltage systems |
| Hot-insertion support | Ioff and power-up 3-state ensure safe insertion/removal in live backplanes without bus contention or latch-up |
| Integrated bus-hold | Eliminates need for 10-kΩ external pullups/pulldowns on unused data lines - reduces BOM count and layout area |
| Flow-through pinout | Input and output pins aligned on opposite sides - simplifies layer routing and minimizes trace crossovers in dense layouts |
| Latch-up immunity | Exceeds 100 mA per JESD 78 Class II - ensures robustness in noisy industrial environments with transient voltage events |
Applications
| Memory Subsystem Interfacing | Backplane Data Routing |
|---|---|
|
Use Scenario: Bidirectional data transfer between 3.3-V CPU/memory controller and 5-V legacy SRAM or Flash devices. IC Role / Device Role / Timing Role: Level-translating bus transceiver managing A/B bus arbitration and direction control under processor command. Use Value: Eliminates discrete level shifters; 30-Ω A-port series resistance dampens reflections on short memory traces. |
Use Scenario: Signal conditioning and isolation between hot-pluggable line cards and central switch fabric in telecom chassis. IC Role / Device Role / Timing Role: Hot-insertion-capable buffer isolating card-local buses from shared backplane during insertion/removal. Use Value: Ioff prevents backfeed into powered-down cards; distributed VCC/GND pins reduce SSN-induced bit errors. |
| Industrial PLC I/O Expansion | Test Equipment Bus Interface |
|
Use Scenario: Extending microcontroller GPIO count to drive multiple isolated digital I/O modules over ribbon cables. IC Role / Device Role / Timing Role: 16-bit parallel repeater with bus-hold ensuring stable logic states on unterminated cable stubs. Use Value: Bus-hold sustains valid levels during cable disconnect; 64-mA B-port sink drives LED indicators directly. |
Use Scenario: Interfacing FPGA-based pattern generators to DUTs with mismatched voltage standards (e.g., 2.5-V tester ↔ 3.3-V DUT). IC Role / Device Role / Timing Role: Precision timing transceiver providing sub-4 ns propagation delay and matched rise/fall times. Use Value: tPHL/tPLH ≤ 3.1 ns at 50 pF ensures setup/hold margin for 200+ MHz test clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC162245DGGR | Lower drive (–24/24 mA B-port), no bus-hold, 1.65–3.6-V VCC | Suitable for cost-sensitive, lower-noise applications where external biasing is acceptable | Choose when 3.3-V-only operation suffices and bus-hold is not required; smaller footprint (TSSOP-48) |
| SN74AVC162245GR | Higher speed (tPHL ≤ 2.4 ns), 1.2–3.6-V VCC, no integrated 30-Ω resistors | Optimized for ultra-low-voltage, high-frequency interfaces (e.g., DDR memory subsystems) | Prefer for sub-1.8-V systems or when external termination is desired; requires careful impedance control |
Compared with SN74LVC162245DGGR and SN74AVC162245GR, the SN74ALVTH162245LR uniquely combines 5-V-tolerant I/Os, integrated bus-hold, and 30-Ω A-port series termination - making it the only option among the three qualified for mixed-voltage hot-plug backplanes without additional support components.
Availability
SN74ALVTH162245LR is available at Aetrix Electronics and suitable for industrial PLC expansion, telecom backplane routing, memory subsystem interfacing, and test equipment bus bridging requiring stable component supply across extended temperature ranges (–40°C to 85°C).
Supply support for SN74ALVTH162245LR 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 SN74ALVTH162245LR belongs to TI's ALVTH advanced bus transceiver family, engineered specifically for mixed-voltage system integration, hot-swap infrastructure, and noise-sensitive industrial backplanes - emphasizing robustness, signal integrity, and ease of layout.
FAQ
What voltage levels does the SN74ALVTH162245LR support on its I/O pins?
The SN74ALVTH162245LR supports 5-V-tolerant inputs and outputs while operating from a 2.3-V to 3.6-V VCC supply. Its I/Os accept VI up to 5.5 V regardless of VCC level, enabling seamless interfacing between 2.5-V/3.3-V controllers and legacy 5-V peripherals without external level shifters - a capability confirmed in the absolute maximum ratings and recommended operating conditions tables of the SCES331A datasheet.
Does the SN74ALVTH162245LR require external pullup or pulldown resistors?
No, the SN74ALVTH162245LR includes active bus-hold circuitry on all data inputs, which sustains valid logic states (IBHL = 75 µA, IBHH = –75 µA at 3 V) without external resistors. The datasheet explicitly warns against using pullups/pulldowns with bus-hold enabled, as they conflict with internal biasing - making the SN74ALVTH162245LR self-stabilizing on floating inputs in real-world PCB layouts.
How does the SN74ALVTH162245LR support hot insertion?
The SN74ALVTH162245LR supports hot insertion through two complementary features: Ioff circuitry disables outputs when VCC = 0, preventing backflow current, and power-up 3-state holds outputs in high-impedance until VCC exceeds 1.2 V. Both mechanisms are fully characterized per JESD78 Class II latch-up testing and validated in TI's ABT process - ensuring safe operation during live board replacement in telecom and industrial systems.
What is the purpose of the 30-Ω series resistance on the A-port outputs of the SN74ALVTH162245LR?
The 30-Ω series resistance integrated into each A-port output of the SN74ALVTH162245LR serves as on-die source termination to suppress transmission-line reflections and reduce overshoot/undershoot on short to medium-length traces. This eliminates the need for discrete 33-Ω resistors typically placed near drivers - simplifying layout, reducing component count, and improving signal fidelity in memory and local bus applications.
Which package variant corresponds to the SN74ALVTH162245LR orderable part number?
The SN74ALVTH162245LR is specified in the DL package - a 48-pin plastic small-outline package (SSOP) with 0.5-mm pitch, 7.9 mm × 12.5 mm body dimensions, and 1.2 mm maximum height. This is confirmed in TI's official ordering information table and mechanical drawings (MPDS006C), and distinguishes it from DGG (TSSOP) and DGV (TVSOP) variants used for other suffixes like GR and VR.
SN74ALVTH162245LR 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:
- 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, 32mA
- 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
SN74ALVTH162245LR FAQ
1.How can I place an order for SN74ALVTH162245LR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH162245LR 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 SN74ALVTH162245LR reliable?
The price and inventory of SN74ALVTH162245LR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH162245LR is usually 5 days.
3.What payment methods are accepted for SN74ALVTH162245LR?
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4.How is shipping managed for SN74ALVTH162245LR?
SN74ALVTH162245LR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTH162245LR 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 SN74ALVTH162245LR?
For technical support, including SN74ALVTH162245LR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH162245LR requirements.
6.How does Aetrix verify that SN74ALVTH162245LR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH162245LR 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 SN74ALVTH162245LR meets industry standards.
7.What is the process for return or replacement of SN74ALVTH162245LR?
All SN74ALVTH162245LR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH162245LR, 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 SN74ALVTH162245LR part is unused and in its original packaging.
Return procedure for SN74ALVTH162245LR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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