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Texas Instruments SN74ABT125DRG4
- Part No.:
- SN74ABT125DRG4
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74ABT125DRG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,106
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Product details
Overview
SN74ABT125DRG4 from Texas Instruments is a quadruple bus buffer gate with independent 3-state outputs, designed for high-speed TTL-compatible data routing in industrial and embedded systems. It delivers −32-mA high-drive IOH and 64-mA IOL, supports hot insertion via Ioff and power-up 3-state logic, and operates across −40°C to 85°C at 4.5–5.5 V supply. Used in backplane interface, memory address buffering, and bus isolation circuits.
For engineers reviewing the SN74ABT125DRG4 datasheet, SN74ABT125DRG4 pinout, SN74ABT125DRG4 application, or SN74ABT125DRG4 equivalent, key selection criteria include output drive strength, ground bounce performance (<1 V VOLP), thermal resistance (86°C/W for SOIC-D), hot-swap capability, and 14-pin SOIC package compatibility with legacy board layouts.
Technical Context
The SN74ABT125DRG4 implements four independent noninverting buffers, each with dedicated output-enable (OE) control enabling per-channel 3-state management. Its ABT logic family provides TTL-level input thresholds (VIH = 2 V, VIL = 0.8 V) and fast propagation delays (tPLH/tPHL ≤ 4.9 ns at 5 V).
Hot-insertion support is achieved through dual protection mechanisms: Ioff circuitry disables outputs when VCC = 0 V (±100 µA leakage), while power-up 3-state forces high-impedance during supply ramping (Δt/ΔVCC ≤ 200 µs/V). Output clamping (−50 mA IOK) and latch-up immunity (>500 mA per JESD-17) ensure robustness in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - compatible with standard 5-V TTL and CMOS systems without level-shifting. |
| Output Drive | −32 mA IOH / 64 mA IOL - drives heavy capacitive loads and multiple TTL inputs directly. |
| Propagation Delay | ≤4.9 ns (tPLH/tPHL) - enables >200-MHz bus operation in short trace configurations. |
| Ground Bounce | <1 V VOLP at 5 V, 25°C - minimizes signal integrity disruption during simultaneous switching. |
| Thermal Resistance | 86°C/W θJA (SOIC-D package) - defines maximum power dissipation (≈145 mW at 85°C ambient) before derating. |
| ESD Rating | 2000-V HBM, 200-V MM - exceeds JEDEC JESD22-A114/A115 for handling in non-ESD-controlled environments. |
| Ioff Leakage | ±100 µA at VCC = 0 - prevents backflow current during live insertion into powered backplanes. |
Pinout & Package
SN74ABT125DRG4 uses a 14-pin SOIC (D) package measuring 8.65 mm × 3.91 mm × 1.75 mm (max height), with 1.27-mm lead pitch and RoHS-compliant NiPdAu plating. Thermal pad not present; standard solder reflow profile (Level-1-260°C-UNLIM).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Output Enable (1OE–4OE) | Active-low control: high = high-Z output; requires pullup to VCC for safe power-up state. |
| 2, 5, 11, 14 | Input (1A–4A) | TTL-compatible inputs; VIH = 2 V, VIL = 0.8 V; Ci = 3 pF limits high-frequency loading. |
| 3, 6, 12, 9 | Output (1Y–4Y) | High-drive buffered outputs; VOL = 0.55 V @ 64 mA ensures solid logic low under load. |
| 7 | GND | Power return reference; separate from VCC plane to minimize ground bounce coupling. |
| 14 | VCC | 5-V supply rail; decoupling capacitor (0.1 µF) required within 10 mm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Hot-insertion support | Ioff and power-up 3-state eliminate bus contention and backfeed current during live module replacement. |
| High-output drive | 64-mA sink capability allows direct driving of 10+ TTL loads or long PCB traces without external buffers. |
| Low ground bounce | <1 V VOLP reduces crosstalk and timing jitter in multi-buffer parallel configurations. |
| Latch-up immunity | Exceeds 500 mA per JESD-17 - withstands transient overcurrent events in industrial power environments. |
| Wide temperature range | −40°C to +85°C operation supports deployment in uncontrolled enclosures and outdoor electronics. |
Applications
| Backplane Data Routing | Memory Address Buffering |
|---|---|
Use Scenario: Isolating and driving address/data lines between CPU and peripheral cards in modular rack systems. IC Role / Device Role / Timing Role: Bidirectional bus buffer with per-lane enable control, ensuring clean signal transitions across 15-cm backplane traces. Use Value: 64-mA IOL maintains valid logic levels despite 50-pF trace capacitance and EMI-induced noise. | Use Scenario: Amplifying and latching microcontroller address signals to drive multiple SRAM chips on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state outputs synchronized to memory enable strobes. Use Value: 4.9-ns max propagation delay preserves setup/hold timing margins for 25-MHz address cycles. |
| Industrial PLC I/O Expansion | Digital Test Equipment Signal Conditioning |
Use Scenario: Interfacing field sensors to a central controller via isolated communication modules with hot-swap capability. IC Role / Device Role / Timing Role: Level-shifting and bus-isolation buffer enabling safe insertion/removal of I/O cards without system shutdown. Use Value: Ioff leakage ≤ ±100 µA prevents damage to powered backplane during card replacement. | Use Scenario: Driving precision DAC outputs or ADC inputs in automated test fixtures requiring low-noise signal paths. IC Role / Device Role / Timing Role: Low-ground-bounce buffer isolating sensitive analog sections from digital switching noise. Use Value: VOLP < 1 V eliminates false triggering in sub-100-ps timing windows used in high-speed parametric testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125APWR | 3.3-V only supply (1.65–3.6 V); lower drive (−24/24 mA); 3.3-V logic thresholds. | Not suitable for 5-V TTL systems; requires level translation if interfacing with legacy 5-V peripherals. | Select when migrating to 3.3-V designs with lower power budgets and no 5-V compatibility requirement. |
| SN74AHCT125DR | 5-V supply only; TTL-compatible inputs; lower drive (−8/8 mA); higher propagation delay (≤10 ns). | Acceptable for low-speed 5-V buses but cannot drive heavy loads or meet tight timing in high-throughput systems. | Choose for cost-sensitive, low-power 5-V applications where 64-mA drive and sub-5-ns delay are unnecessary. |
Compared with SN74LVC125APWR and SN74AHCT125DR, SN74ABT125DRG4 uniquely combines 5-V TTL compatibility, high-current drive, and sub-5-ns speed-making it irreplaceable in legacy industrial backplanes requiring robust hot-swap and noise immunity.
Availability
SN74ABT125DRG4 is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and test equipment design requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for SN74ABT125DRG4 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 over 90 years of innovation in industrial and automotive electronics.
The ABT logic family-including SN74ABT125DRG4-is engineered for high-speed, high-noise-margin 5-V bus interfacing in mission-critical industrial control and communications infrastructure.
FAQ
What is the maximum operating temperature for SN74ABT125DRG4?
The SN74ABT125DRG4 is rated for continuous operation from −40°C to +85°C ambient temperature. This range is validated per JEDEC JESD78 and applies to all SOIC-D packaged variants including SN74ABT125DRG4. Operation beyond 85°C requires derating based on θJA = 86°C/W and actual power dissipation.
Does SN74ABT125DRG4 support hot-plug insertion?
Yes, SN74ABT125DRG4 supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0 V (leakage ≤ ±100 µA), and power-up 3-state holds outputs in high-Z during supply ramp-up. These functions prevent bus contention and backfeed current when inserting into live 5-V backplanes.
What is the recommended pull-up resistor value for OE pins on SN74ABT125DRG4?
The minimum OE pull-up resistor for SN74ABT125DRG4 is determined by the driver's current-sinking capability. TI recommends ≥10 kΩ for standard 5-V systems; values below 4.7 kΩ may cause excessive current draw during active-low assertion. Always tie unused OE pins to VCC or GND to avoid floating inputs.
Can SN74ABT125DRG4 drive multiple TTL inputs directly?
Yes, SN74ABT125DRG4 can drive up to 10 standard TTL inputs directly due to its 64-mA low-level output current (IOL). Each TTL input draws ~1.6 mA, so 64 mA ÷ 1.6 mA = 40 fanout-well above typical requirements. Verify trace capacitance and ground bounce in dense layouts using the measured VOLP < 1 V spec.
Is SN74ABT125DRG4 pin-compatible with other ABT125 variants?
Yes, SN74ABT125DRG4 shares identical pinout and functionality with all SN74ABT125 variants in SOIC-D (e.g., SN74ABT125DR, SN74ABT125DG4), SSOP-DB, TSSOP-PW, and PDIP-N packages. Mechanical dimensions differ, but electrical behavior, timing, and logic function are fully consistent across these package options.
SN74ABT125DRG4 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
SN74ABT125DRG4 FAQ
1.How can I place an order for SN74ABT125DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT125DRG4 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 SN74ABT125DRG4 reliable?
The price and inventory of SN74ABT125DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT125DRG4 is usually 5 days.
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SN74ABT125DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT125DRG4 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 SN74ABT125DRG4?
For technical support, including SN74ABT125DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT125DRG4 requirements.
6.How does Aetrix verify that SN74ABT125DRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT125DRG4 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 SN74ABT125DRG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT125DRG4?
All SN74ABT125DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT125DRG4, 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 SN74ABT125DRG4 part is unused and in its original packaging.
Return procedure for SN74ABT125DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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