My Inquiry
My Account
Texas Instruments SN74ABT125DRE4
- Part No.:
- SN74ABT125DRE4
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74ABT125DRE4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,105
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABT125DRE4 from Texas Instruments is a quadruple 3-state bus buffer gate IC used for bidirectional data isolation and signal driving in high-speed digital buses. It features four independent noninverting buffers, each with separate output-enable (OE) control, ±32-mA high-drive outputs, Ioff support for hot insertion, and operation across −40°C to 85°C. It is commonly deployed in backplane interface logic, memory address/data bus buffering, and FPGA-to-ASIC interconnects.
For engineers reviewing the SN74ABT125DRE4 datasheet, SN74ABT125DRE4 pinout, SN74ABT125DRE4 application, or SN74ABT125DRE4 equivalent, key selection criteria include its 3-state output architecture, 5-V supply compatibility, thermal performance in SOIC-D package, and compliance with JEDEC JESD-17 latch-up and JESD-22 ESD standards.
Technical Context
The SN74ABT125DRE4 implements TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and delivers rail-to-rail CMOS-level outputs under load. Its power-up 3-state circuitry ensures outputs remain high-impedance during VCC ramp-up/down, preventing bus contention. The Ioff feature disables all outputs when VCC = 0 V, blocking current backflow during hot-plug events.
Each buffer operates independently: A input drives Y output only when OE is low; OE high forces Y into high-Z. Propagation delays are tightly specified - tPLH/tPHL ≤ 6 ns at VCC = 5 V, TA = 25°C - enabling use in sub-100-MHz synchronous bus systems with controlled timing margins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5-V TTL/CMOS logic rails; not rated for 3.3-V operation. |
| Output Drive | −32 mA IOH / +64 mA IOL - supports heavy capacitive loads (e.g., >50 pF) and fan-out to ≥10 standard TTL inputs. |
| Propagation Delay | ≤6 ns (tPLH/tPHL) - enables reliable operation in 100-MHz bus clock domains with margin. |
| Ioff Current | ±100 μA max at VCC = 0 V - prevents damaging back-current during live board insertion or partial power-down. |
| ESD Rating | 2000-V HBM, 200-V MM - exceeds JEDEC JESD22-A114/A115, suitable for handling in uncontrolled environments. |
| Latch-Up Immunity | >500 mA per JESD17 - robust against transient current surges in noisy industrial or telecom backplanes. |
| Operating Temperature | −40°C to +85°C - qualified for commercial and industrial ambient conditions without derating. |
Pinout & Package
SN74ABT125DRE4 is housed in a 14-pin SOIC (D) package, 3.90 mm wide, 1.75 mm max height, with 1.27 mm pitch. Pin 1 is marked by a beveled corner or notch; device orientation follows JEDEC MS-012 AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | OE (Output Enable) | Active-low control per buffer; high = high-impedance output; tied to VCC via pullup for safe power-up state. |
| 2, 5, 11, 14 | A (Input) | Noninverting data input for corresponding buffer channel (1A–4A). |
| 3, 6, 12, 9 | Y (Output) | 3-state noninverting buffered output (1Y–4Y); driven only when OE is low. |
| 7 | GND | Ground reference for all logic and output stages; must be low-inductance connection. |
| 14 | VCC | +5-V supply; bypassing with 0.1-μF ceramic capacitor near pin is mandatory for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Hot-insertion support | Ioff and power-up 3-state eliminate bus conflicts during live card replacement in telecom or server backplanes. |
| High-noise immunity | Input hysteresis (Vhys = 100 mV) rejects fast transients on shared control lines like OE. |
| Low ground bounce | VOLP < 1 V at VCC = 5 V - minimizes simultaneous switching noise in dense PCB layouts. |
| Robust bus driving | 64-mA sink capability allows direct drive of unterminated stubs or multiple TTL loads without external buffers. |
| Thermal reliability | θJA = 86°C/W in SOIC-D package - enables stable operation at full drive strength up to +85°C ambient. |
Applications
| Backplane Bus Isolation | FPGA I/O Expansion |
|---|---|
Use Scenario: Isolating address/data lines between two voltage domains or clock domains on a multi-slot backplane. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer providing controlled signal gating and level-shifting-free interfacing. Use Value: Prevents bus contention during slot insertion/removal and reduces crosstalk via high-Z state during idle cycles. | Use Scenario: Extending limited FPGA I/O pins to drive off-chip memory, peripherals, or status LEDs. IC Role / Device Role / Timing Role: Output driver with configurable enable control, matching FPGA timing constraints via fixed propagation delay. Use Value: Enables deterministic timing closure with ≤6 ns delay variation and eliminates need for external series termination resistors. |
| Industrial PLC I/O Modules | Legacy System Interfacing |
Use Scenario: Buffering sensor data or actuator control signals in programmable logic controller modules subject to EMI. IC Role / Device Role / Timing Role: Noise-immune signal conditioner with hysteresis and high ESD tolerance for field wiring interfaces. Use Value: Survives 2000-V HBM discharges and maintains integrity in electrically noisy factory environments. | Use Scenario: Interfacing modern microcontrollers to legacy parallel peripherals (e.g., dot-matrix displays, EPROM programmers). IC Role / Device Role / Timing Role: Level-consistent bus repeater ensuring TTL-compatible voltage swing and drive strength. Use Value: Eliminates signal degradation over long traces and supports fan-out to multiple vintage devices without signal regeneration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT244N | Octal (8-channel), same VCC range and drive strength; larger PDIP-20 package. | Higher channel count suits wider buses; requires more PCB area and routing resources. | Select when expanding to 8-bit data paths or consolidating multiple SN74ABT125DRE4 functions. |
| SN74LVC125APW | 3.3-V only (1.65–3.6 V), lower drive (−24/+24 mA), smaller TSSOP-14 package. | Designed for low-voltage mixed-signal systems; incompatible with 5-V buses without level translation. | Choose only for new 3.3-V designs where power efficiency and footprint are prioritized over 5-V interoperability. |
Compared with SN74ABT244N and SN74LVC125APW, the SN74ABT125DRE4 uniquely balances 5-V bus compatibility, hot-swap safety, and compact SOIC-D packaging - making it optimal for retrofitting legacy 5-V systems requiring minimal layout change.
Availability
SN74ABT125DRE4 is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and embedded control applications requiring stable component supply and long-term manufacturing continuity.
Supply support for SN74ABT125DRE4 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 with decades of automotive, industrial, and communications qualification experience.
The SN74ABT125DRE4 belongs to TI's ABT logic family, engineered for high-speed, high-drive 5-V bus interfacing in mission-critical systems where reliability under electrical stress and thermal variation is essential.
FAQ
What is the recommended pull-up resistor value for OE pins on SN74ABT125DRE4?
The OE pin should be tied to VCC through a pull-up resistor to ensure high-impedance state during power-up. Minimum resistance is determined by the current-sinking capability of the driver controlling OE; typical values range from 4.7 kΩ to 10 kΩ. TI recommends verifying against the specific driver's VOH/IOL specs to avoid violating VIH minimum (2 V) under worst-case loading.
Can SN74ABT125DRE4 operate reliably at 3.3 V?
No. SN74ABT125DRE4 is specified only for 4.5 V to 5.5 V supply operation. At 3.3 V, VIH (2 V) and VOL (≤0.55 V) margins collapse, and output drive degrades significantly. For 3.3-V systems, use SN74LVC125A or SN74ALVC125 instead - both are functionally identical but rated for 1.65–3.6 V.
Does SN74ABT125DRE4 require external decoupling capacitors?
Yes. A 0.1-μF ceramic capacitor must be placed as close as possible to the VCC pin (Pin 14) and GND (Pin 7) to suppress high-frequency switching noise and ground bounce. Additional bulk capacitance (e.g., 4.7-μF tantalum) is recommended near the power entry point for multi-buffer systems.
Is SN74ABT125DRE4 pin-compatible with SN74ABT125DR?
Yes. Both SN74ABT125DRE4 and SN74ABT125DR are identical in SOIC-D package, pinout, and electrical specifications. The "E4" suffix denotes TI's green (RoHS-compliant, NiPdAu) lead finish, while "DR" uses standard NiPdAu; they are interchangeable in design and layout.
How does the Ioff feature protect SN74ABT125DRE4 during hot insertion?
The Ioff circuitry disables all outputs when VCC = 0 V, limiting current flow to ±100 μA even if input or output pins are driven externally. This prevents reverse current from backplane traces or powered subsystems into the unpowered IC, eliminating risk of latch-up or damage during live card swapping in telecom or server chassis.
SN74ABT125DRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SOIC
SN74ABT125DRE4 FAQ
1.How can I place an order for SN74ABT125DRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT125DRE4 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 SN74ABT125DRE4 reliable?
The price and inventory of SN74ABT125DRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT125DRE4 is usually 5 days.
3.What payment methods are accepted for SN74ABT125DRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT125DRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT125DRE4?
SN74ABT125DRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT125DRE4 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 SN74ABT125DRE4?
For technical support, including SN74ABT125DRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT125DRE4 requirements.
6.How does Aetrix verify that SN74ABT125DRE4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT125DRE4 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 SN74ABT125DRE4 meets industry standards.
7.What is the process for return or replacement of SN74ABT125DRE4?
All SN74ABT125DRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT125DRE4, 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 SN74ABT125DRE4 part is unused and in its original packaging.
Return procedure for SN74ABT125DRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABT125DRE4 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
