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Texas Instruments SN74LVC125ADB
- Part No.:
- SN74LVC125ADB
- Manufacturer:
- Texas Instruments
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVC125ADB.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:24,380
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Product details
Overview
SN74LVC125ADB from ON Semiconductor is a low-voltage CMOS quad non-inverting buffer with 3-state outputs and 5 V-tolerant inputs/outputs, operating from 1.2 V to 3.6 V supply. It delivers ±24 mA output drive, supports −40 °C to +125 °C operation, features IOFF protection at VCC = 0 V, and is packaged in a 14-pin TSSOP (DT suffix, Case 948G). It is used for memory address driving and TTL-level bus transceiver applications.
For engineers reviewing the SN74LVC125ADB datasheet, SN74LVC125ADB pinout, SN74LVC125ADB application, or SN74LVC125ADB equivalent, key selection criteria include 5 V tolerance on I/O, 3-state enable control per channel, propagation delay down to 1.0 ns at 3.0–3.6 V, high-impedance input leakage <±0.1 µA, and compliance with JEDEC JESD78 Class II latch-up immunity.
Technical Context
The SN74LVC125ADB implements four independent non-inverting buffers, each with dedicated active-low output enable (OEn) control. Each channel transitions between HIGH, LOW, and high-impedance states based on OEn and Dn logic levels, with no internal feedback or clocking - it is purely combinational.
Its 5.5 V absolute maximum input voltage rating enables safe interfacing with legacy 5 V TTL systems while powered from 1.2–3.6 V supplies. The IOFF specification ensures bidirectional I/O isolation when VCC = 0 V, supporting live insertion and hot-swap applications without back-powering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.2 V to 3.6 V - Enables direct integration into modern low-power 1.8 V and 2.5 V logic domains without level shifters. |
| Input Voltage Max | 5.5 V - Allows connection to 5 V TTL outputs without external clamping or translation circuitry. |
| Output Drive | ±24 mA at VCC ≥ 3.0 V - Sufficient to drive multiple LVTTL loads or short PCB traces without signal degradation. |
| Propagation Delay | 1.0 ns (min) to 4.8 ns (max) at VCC = 3.0–3.6 V - Supports >200 MHz data rates in point-to-point or lightly loaded bus configurations. |
| IOFF Leakage | ±10 µA max at VCC = 0 V - Prevents current backflow during power sequencing or partial system shutdown. |
| Operating Temp | −40 °C to +125 °C - Qualified for automotive under-hood and industrial control environments. |
| Input Capacitance | 4.0 pF - Minimizes capacitive loading on upstream drivers, preserving signal edge integrity. |
Pinout & Package
SN74LVC125ADB is housed in a 14-pin Thin Shrink Small Outline Package (TSSOP), Case 948G, with 0.65 mm pitch, body dimensions 5.0 × 4.4 mm, and thermal resistance JA = 100 °C/W on FR4 board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OEn (Active-Low Output Enable) | Per-channel enable control: HIGH disables output (3-state), LOW enables non-inverting pass-through of Dn. |
| 2, 5, 9, 12 | Dn (Data Input) | CMOS-compatible input with 5.5 V tolerance; accepts 1.2–5.5 V logic levels regardless of VCC. |
| 3, 6, 8, 11 | On (3-State Output) | Buffered, non-inverting output capable of sourcing/sinking up to 24 mA; high-Z when corresponding OEn = HIGH. |
| 7 | GND | Ground reference for all I/O and internal circuitry; must be connected before VCC during power-up. |
| 14 | VCC | Primary supply rail (1.2–3.6 V); powers all four buffers and enable logic; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant I/O | Enables seamless interoperation with legacy 5 V TTL systems while operating from sub-2 V supplies - eliminates need for discrete level translators. |
| IOFF protection | Guarantees high-impedance I/O state when VCC = 0 V, preventing back-driving of powered subsystems during hot-plug or partial power-down sequences. |
| Low ICC in all states | Typical 0.1 µA supply current across HIGH/LOW/3-state modes reduces static power consumption in battery-backed or always-on systems. |
| Live insertion support | Combination of IOFF, 5 V tolerance, and ESD robustness (>2 kV HBM) allows safe insertion/removal in powered-backplane applications. |
| Pb-free & RoHS | Meets EU RoHS Directive 2011/65/EU and is halogen-free/BFR-free - suitable for environmentally regulated industrial and automotive end equipment. |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
Use Scenario: Driving address lines from a low-voltage microcontroller (1.8 V) to a 5 V SRAM or Flash memory device. IC Role / Device Role / Timing Role: Level-translating buffer providing 5 V-tolerant input reception and 5 V-compatible output drive without external components. Use Value: Eliminates discrete level shifters, reduces BOM count, and maintains timing margins with <4.8 ns propagation delay at 3.3 V. | Use Scenario: Isolating and buffering parallel control signals (e.g., chip select, write enable) between a 2.5 V FPGA and 5 V peripheral modules on an industrial PLC backplane. IC Role / Device Role / Timing Role: Quad 3-state buffer enabling dynamic bus sharing via independent OE control per channel. Use Value: Per-channel enable allows selective signal routing without contention; IOFF prevents backfeed during FPGA reconfiguration. |
| Hot-Swap I/O Expansion | Low-Power Sensor Interface |
Use Scenario: Adding modular I/O cards to a powered industrial controller chassis where cards may be inserted or removed during operation. IC Role / Device Role / Timing Role: Signal isolator and driver with guaranteed high-Z I/O at VCC = 0 V during card insertion. Use Value: IOFF and 5 V tolerance prevent damage to host controller and ensure glitch-free enumeration upon card power-up. | Use Scenario: Interfacing multiple 1.8 V digital sensors (e.g., temperature, humidity) to a 3.3 V MCU ADC interface bus with minimal power overhead. IC Role / Device Role / Timing Role: Low-quiescent-current buffer isolating sensor domain from MCU domain while maintaining signal integrity. Use Value: Near-zero static ICC (<10 µA) extends battery life; 4.0 pF input capacitance avoids loading sensitive sensor outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125ADBR | Same electrical specs and pinout; differs only in tape-and-reel packaging (3000 pcs vs. 2500 pcs for SN74LVC125ADB). | No functional difference; identical use cases and layout compatibility. | Select SN74LVC125ADBR for higher-volume automated assembly requiring larger reel size. |
| 74LVC125APW,118 | Identical logic function and 5 V tolerance; uses TSSOP-14 package but with different moisture sensitivity level (MSL3 vs MSL1) and JEDEC-compliant marking. | Suitable for same industrial and automotive applications but requires updated reflow profile due to MSL3 classification. | Choose 74LVC125APW,118 if sourcing through NXP distribution channels or when MSL3 handling infrastructure is already in place. |
Compared with SN74LVC125ADB, SN74LVC125ADBR offers identical performance in a larger tape-and-reel format for high-throughput SMT lines, while 74LVC125APW,118 provides equivalent functionality with MSL3 packaging - both require no PCB changes but differ in logistics and process qualification requirements.
Availability
SN74LVC125ADB is available at Aetrix Electronics and suitable for memory address driving, industrial bus transceivers, hot-swap I/O expansion, and low-power sensor interface applications requiring stable component supply across automotive, industrial, and embedded design cycles.
Supply support for SN74LVC125ADB 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The SN74LVC125ADB belongs to the LVC (Low-Voltage CMOS) logic family, designed specifically for mixed-voltage system interfacing where 1.2–3.6 V core logic must reliably communicate with legacy 5 V peripherals.
FAQ
What is the maximum input voltage rating for SN74LVC125ADB?
The SN74LVC125ADB supports a DC input voltage range of −0.5 V to +6.5 V, with a specified VI maximum of 5.5 V under normal operation. This 5.5 V tolerance enables safe interfacing with 5 V TTL outputs even when the device is powered from as low as 1.2 V, eliminating the need for external level-shifting circuitry in mixed-voltage designs.
Does SN74LVC125ADB support hot-swap or live-insertion applications?
Yes, SN74LVC125ADB supports live insertion and withdrawal thanks to its IOFF specification, which guarantees high-impedance I/O states when VCC = 0 V. This prevents back-driving of powered systems during card insertion, and combined with >2000 V HBM ESD rating and 5 V-tolerant I/O, makes SN74LVC125ADB suitable for hot-pluggable industrial backplanes and modular I/O systems.
What is the typical propagation delay of SN74LVC125ADB at 3.3 V supply?
At VCC = 3.3 V and TA = 25 °C, the typical propagation delay (tpd) of SN74LVC125ADB is 2.5 ns for Dn-to-On transitions, with a maximum of 4.8 ns over −40 °C to +125 °C. This low latency supports reliable operation in high-speed address/data buffering applications such as memory interfaces and FPGA-to-peripheral communication links.
Can SN74LVC125ADB drive standard TTL loads directly?
Yes, SN74LVC125ADB can drive standard TTL loads directly due to its ±24 mA output drive capability at VCC ≥ 3.0 V and TTL-compatible output voltage levels (VOH ≥ VCC − 0.2 V, VOL ≤ 0.55 V). Its 5 V-tolerant inputs also accept standard TTL HIGH-level signals (≥2.0 V), making SN74LVC125ADB a drop-in replacement for legacy 74LS125 in many bus-oriented applications.
Is SN74LVC125ADB RoHS compliant and lead-free?
Yes, SN74LVC125ADB is Pb-free, halogen-free/BFR-free, and fully RoHS compliant per Directive 2011/65/EU. The "G" suffix in the full orderable part number (e.g., SN74LVC125ADBRG) explicitly denotes the lead-free package, and the device meets JEDEC JS709B and IPC-1752A material declaration requirements for environmental compliance.
SN74LVC125ADB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
SN74LVC125ADB FAQ
1.How can I place an order for SN74LVC125ADB through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC125ADB 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 SN74LVC125ADB reliable?
The price and inventory of SN74LVC125ADB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC125ADB is usually 5 days.
3.What payment methods are accepted for SN74LVC125ADB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC125ADB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC125ADB?
SN74LVC125ADB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC125ADB 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 SN74LVC125ADB?
For technical support, including SN74LVC125ADB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC125ADB requirements.
6.How does Aetrix verify that SN74LVC125ADB is sourced from the original manufacturer or authorized distributors?
All SN74LVC125ADB 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 SN74LVC125ADB meets industry standards.
7.What is the process for return or replacement of SN74LVC125ADB?
All SN74LVC125ADB units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC125ADB, 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 SN74LVC125ADB part is unused and in its original packaging.
Return procedure for SN74LVC125ADB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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