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Nexperia USA Inc. 74ABT125D,623
- Part No.:
- 74ABT125D,623
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74ABT125D,623.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,395
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Product details
Overview
74ABT125D,623 from Nexperia is a quad 3-state buffer/line driver with independent active-low output enable inputs (1OE–4OE), designed for bus interface and signal isolation in TTL-compatible digital systems. It operates from 4.5 V to 5.5 V, delivers ±32 mA/±64 mA output drive, supports partial power-down via IOFF circuitry, and is rated for -40 °C to +85 °C industrial temperature range.
For engineers reviewing the 74ABT125D,623 datasheet, 74ABT125D,623 pinout, 74ABT125D,623 application, or 74ABT125D,623 equivalent, this device is selected for high-speed bidirectional bus buffering where low propagation delay (≤4.9 ns), robust ESD protection (HBM >2000 V), and live insertion capability are critical in industrial control backplanes and legacy system upgrades.
Technical Context
The 74ABT125D implements four independent non-inverting buffers, each with dedicated active-low 3-state control. Its BiCMOS architecture enables TTL-level input compatibility and fast switching-propagation delays range from 1.0 ns (typ) to 4.9 ns (max) across temperature and voltage.
IOFF circuitry ensures outputs enter high-impedance state during power-down, blocking damaging backflow current. Input clamping, latch-up immunity (>500 mA), and power-up 3-state behavior make it suitable for hot-swap and mixed-voltage board designs without external isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across standard 5 V rail tolerances and brown-out conditions. |
| Output Drive | High: -32 mA; Low: +64 mA - Drives heavy capacitive loads and multiple TTL inputs without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 4.9 ns @ VCC = 5.0 V - Enables reliable timing in ≥200 MHz bus cycles with margin. |
| IOFF Leakage | ±100 μA @ VCC = 0 V - Prevents cross-current between powered and unpowered sections in partial power-down systems. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Survives handling and board-level transients without protection diodes. |
| Operating Temp | -40 °C to +85 °C - Qualified for industrial environments including factory automation and telecom infrastructure. |
| Input Compatibility | TTL-level - Directly interfaces with legacy 74LS/74F logic without level-shifting. |
Pinout & Package
74ABT125D,623 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads. Pin 1 is marked by index notch or dot; pin 14 is VCC, pin 7 is GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-low output enable - Each controls one buffer independently; HIGH forces high-impedance output. |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Data inputs - Accept TTL-compatible logic levels; disabled during 3-state mode. |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Buffered outputs - Non-inverting, 3-state capable, support bus sharing and bidirectional signaling. |
| 7 | GND | Ground reference - Primary return path for all I/O and supply currents; must be low-impedance. |
| 14 | VCC | Power supply - Supplies internal BiCMOS circuitry; requires local 100 nF decoupling near pin. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process | Combines bipolar speed and CMOS low static power - achieves sub-5 ns propagation with <1.5 mA ICC per enabled buffer. |
| IOFF partial power-down | Automatically disables outputs when VCC = 0 V - eliminates need for external isolation switches in modular systems. |
| Live insertion/extraction | Validated mechanical and electrical tolerance - allows board replacement under power without system reset. |
| Latch-up immunity | Exceeds JESD78B Class II Level A (500 mA) - prevents destructive latch-up during transient overvoltage events. |
| Power-up 3-state | Outputs remain high-Z until VCC stabilizes - avoids bus contention during power sequencing. |
Applications
| Industrial Backplane Interface | Legacy System Bus Isolation |
|---|---|
Use Scenario: Buffering address/data lines between CPU and peripheral cards in DIN-rail mounted PLC backplanes. IC Role / Device Role / Timing Role: Quad 3-state buffer isolates card-specific logic domains while enabling shared bus arbitration. Use Value: ±64 mA sink capability drives long traces and multiple TTL loads; IOFF prevents backfeed when cards are hot-swapped. | Use Scenario: Interfacing modern microcontrollers to legacy 74LS-based instrumentation subsystems. IC Role / Device Role / Timing Role: Level-translation and fanout buffer ensuring TTL-compatible thresholds and timing compliance. Use Value: Direct TTL input compatibility eliminates level shifters; 4.9 ns max tPHL preserves setup/hold margins in 20 MHz bus cycles. |
| Test Equipment Signal Routing | Modular Power Supply Control |
Use Scenario: Multiplexing control signals between FPGA test controller and DUT interface boards in ATE systems. IC Role / Device Role / Timing Role: Bidirectional bus switch controlled via independent OE pins for dynamic signal path reconfiguration. Use Value: Independent 3-state enables glitch-free signal routing; HBM >2000 V withstands probe contact discharge. | Use Scenario: Enabling/disabling isolated DC-DC converter enable lines in multi-rail programmable power supplies. IC Role / Device Role / Timing Role: Logic-controlled gate driver for sequenced power-up of downstream rails. Use Value: Power-up 3-state prevents premature activation; IOFF blocks reverse current if main rail fails first. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT125DR | TI part in SOIC-14; identical logic function but different AC specs - tPHL max = 5.5 ns vs 4.9 ns; IOFF not specified. | Lacks IOFF protection - unsuitable for partial power-down systems requiring backflow prevention. | Select only if IOFF is unnecessary and TI sourcing preference exists; verify timing margin at worst-case VCC/temp. |
| 74LVC125APW | Nexperia LVC variant in TSSOP-14; 1.65–3.6 V supply; lower drive (±24 mA); no IOFF; higher input capacitance (4 pF vs 3 pF). | Designed for 3.3 V systems - incompatible with 5 V TTL buses without level translation. | Use only in 3.3 V domains; avoid where 5 V compatibility or high sink current is required. |
Compared with SN74ABT125DR and 74LVC125APW, the 74ABT125D,623 uniquely combines 5 V TTL compatibility, IOFF-enabled safe power-down, and the lowest max propagation delay in its family - making it the sole choice for industrial hot-swap backplanes operating at full 5 V.
Availability
74ABT125D,623 is available at Aetrix Electronics and suitable for industrial backplane interface, legacy system bus isolation, and modular power supply control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ABT125D,623 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
Nexperia is a global semiconductor expert headquartered in Nijmegen, Netherlands, specializing in high-performance logic, analog, and discrete components for industrial, automotive, and computing markets.
The 74ABT series targets high-speed, robust bus interface applications in industrial and telecom equipment, emphasizing TTL compatibility, ESD resilience, and partial power-down safety - directly addressing design needs in legacy-system upgrades and modular hardware.
FAQ
What is the maximum clock frequency supported by the 74ABT125D,623?
The 74ABT125D,623 does not operate on a clock; it is an asynchronous buffer. Its usable data rate depends on propagation delay and system timing margins. With a maximum tPHL of 4.9 ns and tPLH of 4.6 ns, it supports reliable bus operation up to approximately 200 MHz in well-terminated, low-skew layouts - assuming setup/hold times are met by upstream drivers.
Can the 74ABT125D,623 be used with 3.3 V logic inputs?
No - the 74ABT125D,623 is specified only for 4.5 V to 5.5 V VCC and requires TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V). While 3.3 V logic may meet VIH min at room temperature, it violates the recommended operating conditions and risks unreliable operation across temperature and voltage extremes; use 74LVC125 for 3.3 V systems.
Is the thermal pad on the DHVQFN package (74ABT125BQ) electrically connected?
The exposed thermal pad on the SOT762-1 (DHVQFN14) package is not electrically connected to any internal node. Per datasheet Section 5.1, it has no electrical or mechanical requirement to be soldered; if soldered, it must remain floating or be tied to GND - never to VCC or signal nets - to avoid unintended coupling or short circuits.
Does the 74ABT125D,623 support hot-plug without external protection?
Yes - the device is explicitly qualified for live insertion and extraction per datasheet Section 2. Its IOFF circuitry, latch-up immunity (>500 mA), and robust ESD protection (HBM >2000 V) allow safe hot-plug operation in properly designed backplanes. However, system-level protection (e.g., series resistors, TVS diodes on long cables) remains necessary to handle external surge events beyond IC-level ratings.
74ABT125D,623 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74ABT
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74ABT125D,623 FAQ
1.How can I place an order for 74ABT125D,623 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT125D,623 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 74ABT125D,623 reliable?
The price and inventory of 74ABT125D,623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT125D,623 is usually 5 days.
3.What payment methods are accepted for 74ABT125D,623?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT125D,623 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT125D,623?
74ABT125D,623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT125D,623 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 74ABT125D,623?
For technical support, including 74ABT125D,623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT125D,623 requirements.
6.How does Aetrix verify that 74ABT125D,623 is sourced from the original manufacturer or authorized distributors?
All 74ABT125D,623 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 74ABT125D,623 meets industry standards.
7.What is the process for return or replacement of 74ABT125D,623?
All 74ABT125D,623 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT125D,623, 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 74ABT125D,623 part is unused and in its original packaging.
Return procedure for 74ABT125D,623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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