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Texas Instruments SN74LVTH16952DGGR
- Part No.:
- SN74LVTH16952DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74LVTH16952DGGR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:136
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Product details
Overview
SN74LVTH16952DGGR from Texas Instruments is a 3.3-V ABT 16-bit registered transceiver with 3-state outputs, designed for bidirectional data flow between 3.3-V logic and 5-V TTL systems. It features dual 8-bit or single 16-bit operation, bus-hold on all data inputs, Ioff support for hot insertion, and operates from 2.7 V to 3.6 V. Used in backplane interface and mixed-voltage board-level communication.
For engineers reviewing the SN74LVTH16952DGGR datasheet, SN74LVTH16952DGGR pinout, SN74LVTH16952DGGR application, or SN74LVTH16952DGGR equivalent, key selection considerations include its 56-pin TSSOP (DGG) package, 150-MHz max clock frequency, ±100 µA Ioff at VCC = 0, 0.55-V VOL at IOL = 64 mA, and bus-hold functionality eliminating external resistors.
Technical Context
The SN74LVTH16952DGGR implements two independent 8-bit registered transceiver channels-A↔B-with separate clock (CLKAB/CLKBA), clock-enable (CLKENAB/CLKENBA), and output-enable (OEAB/OEBA) controls per direction. Each channel latches data on the low-to-high clock transition when its respective clock-enable is low.
Its Advanced BiCMOS Technology (ABT) enables 3.3-V VCC operation while tolerating 5-V inputs/outputs, and distributed VCC/GND pins plus flow-through architecture minimize switching noise and optimize PCB layout. Power-up 3-state and Ioff circuitry ensure safe hot-insertion and prevent backflow during power transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports regulated and unregulated battery operation down to 2.7 V without functional degradation. |
| Max Clock Frequency | 150 MHz - enables high-speed synchronous data transfer in register-controlled bus interfaces. |
| Ioff Current | ±100 µA at VCC = 0 - blocks damaging current backflow during hot-swap or partial power-down. |
| VOL @ IOL = 64 mA | 0.55 V - ensures robust low-level signaling margin under full-load 3.3-V CMOS/TTL drive conditions. |
| Bus-Hold Current | ±75 µA - actively holds floating A/B port inputs at valid logic levels, removing need for external pullup/pulldown resistors. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and communications equipment environments. |
| Package Thermal Impedance | 64°C/W (θJA) - defines thermal performance limit for continuous operation in standard PCB layouts. |
Pinout & Package
TSSOP-56 (DGG) package: 13.9 mm × 6.1 mm × 1.2 mm body, 0.5-mm pitch, lead-free NiPdAu finish, moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (active-low) | Controls 3-state output drivers for corresponding A↔B data paths; OE low enables data flow, high disables outputs to high-Z. |
| 1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA | Register Clock (rising-edge) | Latches A-port or B-port data into internal registers on low-to-high transition; determines synchronous timing boundary. |
| 1CLKENAB, 2CLKENAB, 1CLKENBA, 2CLKENBA | Clock Enable (active-low) | Gates clock propagation - CLKEN low allows CLK edge to trigger register update; high freezes register state. |
| A1–A8, B1–B8 (x2 sets) | Bidirectional Data I/O | 16 total data lines split across two 8-bit ports; each supports 5-V tolerant input and 3.3-V output drive with bus-hold. |
| VCC, GND (x8 each) | Distributed Power/Ground | Multiple VCC/GND pairs placed throughout pinout reduce simultaneous switching noise and improve signal integrity at high speed. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage interface | Accepts 5-V inputs while operating at 3.3-V VCC - enables direct connection to legacy 5-V TTL buses without level shifters. |
| Hot-insertion support | Ioff and power-up 3-state eliminate bus conflicts and backfeed current during live card insertion or removal. |
| Integrated bus-hold | Active circuitry on all A/B data inputs maintains valid logic state on unused or unterminated lines - removes 32 external resistors. |
| Flow-through pinout | Input and output pins arranged to allow straight PCB trace routing - reduces crosstalk and simplifies layout of high-speed parallel buses. |
| Latch-up immunity | Exceeds 500 mA per JESD17 - ensures robustness against transient-induced latch-up in noisy industrial environments. |
Applications
| Backplane Interface | Industrial PLC Backplane |
|---|---|
Use Scenario: Bidirectional data exchange between 3.3-V microcontroller modules and 5-V legacy I/O cards in modular rack-mounted control systems. IC Role / Device Role / Timing Role: Registered transceiver synchronizing data transfers across voltage domains using system clock and enable signals. Use Value: Eliminates discrete level shifters and pull-up networks while maintaining timing integrity up to 150 MHz on parallel address/data buses. | Use Scenario: Interfacing fieldbus controller (3.3-V FPGA) with 5-V analog/digital I/O modules in programmable logic controller chassis. IC Role / Device Role / Timing Role: Voltage-tolerant registered buffer providing glitch-free data capture and output driving with clocked enable control. Use Value: Bus-hold prevents floating inputs during module hot-swap; Ioff protects powered-down slots from backfeeding active backplane. |
| Telecom Line Card | Test Equipment Backplane |
Use Scenario: High-density line card supporting mixed-voltage daughterboards (FPGA, DSP, legacy ASICs) in carrier-grade access equipment. IC Role / Device Role / Timing Role: Dual-channel registered transceiver managing time-aligned data flow between 3.3-V processing core and 5-V PHY interface ICs. Use Value: Distributed VCC/GND pins suppress ground bounce; 0.55-V VOL ensures reliable low-level recognition under full load at 3.3 V. | Use Scenario: Reconfigurable test fixture connecting 3.3-V DUT controllers to 5-V instrumentation peripherals via shared parallel bus. IC Role / Device Role / Timing Role: Synchronous bidirectional data bridge with independent clocking per direction for flexible stimulus/response sequencing. Use Value: Flow-through architecture minimizes trace skew; 150-MHz capability supports high-throughput pattern generation and acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16952DGGR | Lower drive strength (IOL = 24 mA), no bus-hold, 3.3-V only I/O (no 5-V tolerance) | Suitable only for pure 3.3-V systems; requires external termination; not for mixed-voltage or hot-swap use. | Select when cost-sensitive and voltage domain is strictly 3.3 V with controlled termination. |
| SN74ALVCH16952GR | Higher speed (200 MHz), lower VOL (0.35 V), same 5-V tolerant I/O and bus-hold, but larger 56-pin SSOP (DL) package | Same functional role but higher performance ceiling; DL package has larger footprint and lower thermal efficiency than DGG. | Select when >150 MHz timing margin is required and SSOP layout compatibility exists. |
Compared with SN74LVTH16952DGGR, SN74LVC16952DGGR lacks 5-V tolerance and bus-hold - limiting it to clean 3.3-V-only designs - while SN74ALVCH16952GR delivers higher speed and lower VOL in a thermally less efficient SSOP package, making SN74LVTH16952DGGR optimal for cost-constrained, mixed-voltage industrial backplanes requiring proven hot-swap reliability.
Availability
SN74LVTH16952DGGR is available at Aetrix Electronics and suitable for industrial automation backplanes, telecom line cards, and test equipment requiring stable component supply, long-lifecycle availability, and verified hot-insertion capability.
Supply support for SN74LVTH16952DGGR 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 industrial, automotive, and communications markets.
The SN74LVTH16952DGGR belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically for high-speed, mixed-voltage board-level interconnect in industrial control and telecom infrastructure.
FAQ
What is the maximum clock frequency supported by SN74LVTH16952DGGR?
The SN74LVTH16952DGGR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 3.3 V ± 0.3 V). This rating is validated across the full industrial temperature range (–40°C to +85°C) and applies to both A→B and B→A data paths when using the respective clock and enable inputs. Timing margins remain compliant with tSU, tH, and propagation delays specified in the SCBS697G datasheet.
Does SN74LVTH16952DGGR support hot insertion, and how is it implemented?
Yes, SN74LVTH16952DGGR supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, preventing backflow current, and power-up 3-state forces outputs into high-impedance during power ramp-up/down. Both functions are inherent to the ABT process and require no external components. These mechanisms are fully characterized and guaranteed per JEDEC JESD78 for latch-up and MIL-STD-883 for ESD robustness.
Can SN74LVTH16952DGGR interface directly with 5-V logic systems?
Yes, SN74LVTH16952DGGR accepts 5-V input signals while operating at 3.3-V VCC, and its outputs drive 3.3-V logic levels compatible with 5-V TTL inputs. Input voltage tolerance extends to 5.5 V, and the device maintains valid VIH/VIL thresholds (2.0 V/0.8 V) under 5-V input conditions. No external level-shifting circuitry is required for interoperability with standard 5-V TTL buses.
What is the purpose of bus-hold circuitry on SN74LVTH16952DGGR, and how does it affect design?
The bus-hold circuitry on SN74LVTH16952DGGR actively maintains unused or floating A/B port inputs at their last-valid logic state using ±75 µA hold current. This eliminates the need for external pullup or pulldown resistors - reducing BOM count, PCB area, and potential signal integrity issues. Designers must still terminate control inputs (CLK, OE, CLKEN) per SCBA004 guidelines, but data lines may remain unterminated when idle.
What package type and dimensions does SN74LVTH16952DGGR use?
SN74LVTH16952DGGR uses a 56-pin Thin Shrink Small-Outline Package (TSSOP-DGG) measuring 13.9 mm × 6.1 mm × 1.2 mm with 0.5-mm lead pitch. It features NiPdAu lead finish, complies with RoHS, and carries MSL Level-1 (unlimited floor life at ≤30°C/60% RH). The package drawing is TI's DGG0056A, and land pattern recommendations are provided in TI's 4222167/A layout guide.
SN74LVTH16952DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 56-TSSOP
SN74LVTH16952DGGR FAQ
1.How can I place an order for SN74LVTH16952DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH16952DGGR 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 SN74LVTH16952DGGR reliable?
The price and inventory of SN74LVTH16952DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH16952DGGR is usually 5 days.
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SN74LVTH16952DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH16952DGGR 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 SN74LVTH16952DGGR?
For technical support, including SN74LVTH16952DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH16952DGGR requirements.
6.How does Aetrix verify that SN74LVTH16952DGGR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH16952DGGR 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 SN74LVTH16952DGGR meets industry standards.
7.What is the process for return or replacement of SN74LVTH16952DGGR?
All SN74LVTH16952DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH16952DGGR, 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 SN74LVTH16952DGGR part is unused and in its original packaging.
Return procedure for SN74LVTH16952DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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