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Texas Instruments SN74LVTH125DGVR
- Part No.:
- SN74LVTH125DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 14-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVTH125DGVR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,410
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Product details
Overview
SN74LVTH125DGVR from Texas Instruments is a 3.3-V quad 1-bit noninverting bus buffer with 3-state outputs and bus-hold circuitry, supporting mixed-mode 5-V/3.3-V interfacing in industrial backplanes and legacy system upgrades. It delivers 64 mA sink current, 32 mA source current, <4.5 ns propagation delay at 3.3 V, and operates from 2.7 V to 3.6 V.
For engineers reviewing the SN74LVTH125DGVR datasheet, SN74LVTH125DGVR pinout, SN74LVTH125DGVR application, or SN74LVTH125DGVR equivalent, key selection criteria include hot-insertion support via Ioff and power-up 3-state, bus-hold elimination of external resistors, TTL-compatible 5-V input tolerance, and TVSOP-14 thermal performance (θJA = 127°C/W).
Technical Context
The SN74LVTH125DGVR implements four independent noninverting buffers, each with dedicated output-enable (OE) control and high-impedance state activation on OE high. Its bus-hold circuitry actively maintains valid logic levels on undriven inputs without external components.
Designed for hot-swap environments, it features Ioff protection that disables outputs during power-down to prevent backflow current, and power-up 3-state logic that holds outputs high-Z until VCC exceeds 1.5 V - both critical for live insertion into powered backplanes.
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 while maintaining full TTL interface capability. |
| IOL / IOH | 64 mA / 32 mA - enables direct drive of multiple TTL loads or moderate-capacitance buses without buffering. |
| tPLH / tPHL | 3.5 ns / 3.9 ns typical at VCC = 3.3 V - ensures timing compliance in 25-MHz+ data paths with 50-pF load. |
| VIH / VIL | 2.0 V / 0.8 V - guarantees reliable recognition of 5-V TTL logic levels while operating at 3.3-V supply. |
| Bus-Hold Current | ±500 µA max - provides sufficient overdrive margin to switch held inputs under noise or weak signal conditions. |
| θJA | 127°C/W - defines thermal derating limit for continuous operation in compact TVSOP-14 PCB layouts. |
Pinout & Package
SN74LVTH125DGVR uses the TVSOP-14 (DGV) package: 4.9 mm × 3.9 mm, 0.65 mm pitch, 1.2 mm max height, with exposed pad recommended for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Output-enable control input | Active-low enable; high forces corresponding Y output into high-impedance state - essential for bus arbitration. |
| 1A–4A | Data input | Noninverting buffer input with bus-hold; eliminates need for pullup/pulldown resistors on unused lines. |
| 1Y–4Y | Buffered output | 3-state CMOS output capable of sinking 64 mA or sourcing 32 mA - drives TTL or LVTTL loads directly. |
| VCC | Power supply | 3.3-V nominal supply; accepts 2.7–3.6 V range and tolerates 5-V inputs without level shifters. |
| GND | Ground reference | Common return path for all I/O and supply currents; must be low-impedance for ground bounce control. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode 5-V/3.3-V interface | Accepts 5-V TTL inputs while powered from 3.3 V - enables seamless integration between legacy 5-V logic and modern low-voltage systems. |
| Bus-hold on all data inputs | Eliminates external pullup/pulldown resistors and prevents floating-input metastability in unterminated stubs or hot-swap scenarios. |
| Ioff and power-up 3-state | Prevents damaging current backflow during hot insertion and ensures outputs remain high-Z until stable VCC is established. |
| Low ground bounce (VOLP < 0.8 V) | Reduces switching noise coupling into shared ground planes - critical for signal integrity in dense digital backplanes. |
| Latch-up immunity > 500 mA | Meets JESD17 requirements - ensures robust operation under transient overvoltage or ESD stress in industrial environments. |
Applications
| Industrial Backplane Interface | Legacy System Upgrade |
|---|---|
Use Scenario: Interfacing 3.3-V FPGA I/O banks to existing 5-V TTL control buses in programmable logic controllers. IC Role / Device Role / Timing Role: Level-translating bus buffer providing bidirectional signal conditioning and hot-swap-safe isolation. Use Value: Enables drop-in replacement of obsolete 5-V buffers without redesigning power or termination schemes. | Use Scenario: Upgrading microcontroller-based test equipment with newer 3.3-V MCUs while retaining legacy 5-V peripheral modules. IC Role / Device Role / Timing Role: Noninverting buffer with bus-hold maintaining signal integrity on shared address/data lines during partial power-down. Use Value: Removes need for discrete level shifters and pull resistors - reduces BOM count and layout area by >30%. |
| Hot-Swappable Module Carrier | Automated Test Equipment (ATE) |
Use Scenario: Signal routing on modular rack cards where daughterboards are inserted/removed while main chassis remains powered. IC Role / Device Role / Timing Role: Hot-insertion–qualified buffer isolating module I/O from backplane during insertion transients. Use Value: Ioff and power-up 3-state prevent bus contention and backfeed damage - extends system MTBF by eliminating field-replaceable board failures. | Use Scenario: Driving parallel stimulus/response channels in high-speed digital pattern generators with mixed-voltage DUT interfaces. IC Role / Device Role / Timing Role: Low-skew, low-ground-bounce buffer ensuring clean edge timing across 16-bit wide data paths. Use Value: Sub-4.5 ns propagation delay and <0.8 V VOLP maintain setup/hold margins at 25 MHz with 50-pF trace capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APW | Lower drive (24 mA sink), no bus-hold, 1.65–3.6 V VCC range - lacks 5-V tolerant inputs. | Requires external level shifting for 5-V systems; unsuitable for direct TTL interface. | Select only when interfacing exclusively with 3.3-V or lower logic families and board space permits added discretes. |
| SN74AHCT125PW | 5-V supply only (4.5–5.5 V), 5-V tolerant inputs, higher drive (8 mA source/8 mA sink), no bus-hold. | Cannot operate at 3.3 V; incompatible with low-voltage domains unless isolated via level shifter. | Choose only for pure 5-V systems where SN74LVTH125DGVR's mixed-mode capability is unnecessary. |
Compared with SN74LVC125APW and SN74AHCT125PW, the SN74LVTH125DGVR uniquely combines 3.3-V operation, 5-V input tolerance, bus-hold, and hot-insertion support - making it the sole option for upgrading legacy backplanes without modifying power architecture or adding external components.
Availability
SN74LVTH125DGVR is available at Aetrix Electronics and suitable for industrial backplane interface, legacy system upgrade, and hot-swappable module carrier applications requiring stable component supply and long-term obsolescence management.
Supply support for SN74LVTH125DGVR 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 for industrial, automotive, and communications markets.
The SN74LVTH125DGVR belongs to TI's LVTH logic family, engineered specifically for mixed-voltage system interoperability and hot-swap reliability in mission-critical infrastructure equipment.
FAQ
What voltage levels does the SN74LVTH125DGVR accept on its inputs?
The SN74LVTH125DGVR accepts input voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5-V TTL outputs while powered from 3.3 V. This 5-V tolerance is specified across the full operating temperature range (−40°C to 85°C) and does not require external clamping diodes or level shifters.
Does the SN74LVTH125DGVR require external pullup or pulldown resistors?
No - the SN74LVTH125DGVR integrates active bus-hold circuitry on all data inputs (1A–4A), which maintains valid logic states on undriven or floating lines. Using external resistors with bus-hold is explicitly discouraged in the datasheet, as it may cause contention or increased power consumption.
How does the SN74LVTH125DGVR support hot insertion?
The SN74LVTH125DGVR supports hot insertion through two integrated features: Ioff circuitry disables outputs when VCC = 0 V to prevent backflow current, and power-up 3-state logic holds all outputs in high-impedance until VCC exceeds 1.5 V - both verified per JESD78 and JESD22 standards.
What is the maximum capacitive load the SN74LVTH125DGVR can drive reliably?
The SN74LVTH125DGVR is characterized for CL = 50 pF in switching specifications, with propagation delays (tPLH/tPHL) guaranteed ≤ 4.5 ns at VCC = 3.3 V. While it can drive higher capacitance, timing margins degrade linearly beyond 50 pF; for >75 pF loads, derating analysis using the 127°C/W θJA and output current specs is required.
Is the SN74LVTH125DGVR pin-compatible with other packages in the LVTH125 family?
Yes - the SN74LVTH125DGVR shares identical pinout and function mapping with all LVTH125 variants in D, DB, NS, PW, and RGY packages. Pin 1 (1OE) through pin 14 (GND) retain consistent roles across packages, enabling direct footprint substitution where thermal and mechanical constraints allow.
SN74LVTH125DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 14-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- 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:
- 14-TVSOP
SN74LVTH125DGVR FAQ
1.How can I place an order for SN74LVTH125DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH125DGVR 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 SN74LVTH125DGVR reliable?
The price and inventory of SN74LVTH125DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH125DGVR is usually 5 days.
3.What payment methods are accepted for SN74LVTH125DGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH125DGVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVTH125DGVR?
SN74LVTH125DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH125DGVR 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 SN74LVTH125DGVR?
For technical support, including SN74LVTH125DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH125DGVR requirements.
6.How does Aetrix verify that SN74LVTH125DGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH125DGVR 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 SN74LVTH125DGVR meets industry standards.
7.What is the process for return or replacement of SN74LVTH125DGVR?
All SN74LVTH125DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH125DGVR, 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 SN74LVTH125DGVR part is unused and in its original packaging.
Return procedure for SN74LVTH125DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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