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onsemi 74ABT125CSJ
- Part No.:
- 74ABT125CSJ
- Manufacturer:
- onsemi
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
74ABT125CSJ.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,784
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Product details
Overview
74ABT125CSJ from Fairchild Semiconductor is a quad non-inverting buffer IC with 3-STATE outputs, designed for bus interface and signal isolation in 5V TTL-compatible digital systems. It delivers 32mA output source drive and 64mA sink capability, supports –40°C to +85°C operation, and features glitch-free high-impedance control during power-up/down cycles - used in backplane data routing and memory address buffering.
For engineers reviewing the 74ABT125CSJ datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed latchup protection, sub-7ns propagation delay (tPLH/tPHL), disable time shorter than enable time to prevent bus contention, and EIAJ TYPE II SOP-14 package compatibility.
Technical Context
The 74ABT125CSJ implements four independent buffer channels, each with separate active-low 3-STATE enable control (OE). Its ABT logic family ensures TTL-level input thresholds (VIH = 2.0V, VIL = 0.8V) and 5V supply operation (4.5–5.5V), enabling direct interfacing with legacy 74-series and microcontroller I/Os without level translation.
It provides nondestructive hot insertion support and high-impedance bus loading immunity across full power cycling. Output disable timing (tPHZ = 6.2ns max) is faster than enable timing (tPZH = 5.1ns max), eliminating output contention during state transitions - critical for shared-bus arbitration in industrial control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +4.5V to +5.5V - ensures compatibility with standard 5V TTL and CMOS logic rails. |
| Propagation Delay | 1.0–4.9ns - enables high-speed data transfer in 25+ MHz bus applications. |
| Output Drive | 32mA source / 64mA sink - drives heavy capacitive loads and multiple TTL inputs directly. |
| Input Thresholds | VIH = 2.0V, VIL = 0.8V - guarantees robust noise margin and interoperability with 5V logic families. |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating. |
| 3-STATE Disable Time | tPHZ ≤ 6.2ns - ensures rapid bus release to avoid contention with other drivers. |
Pinout & Package
EIAJ TYPE II 14-pin Small Outline Package (SOP), 5.3mm body width, JEDEC-compliant footprint with gull-wing leads and pin 1 indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Input (A1–A4) | Data input for each of four buffer channels. |
| 2, 5, 11, 14 | Output (Y1–Y4) | Non-inverting buffered output; high-impedance when OE asserted. |
| 3, 6, 8, 12 | Output Enable (OE1–OE4) | Active-low control per channel - enables independent 3-STATE gating. |
| 7 | GND | Ground reference for all logic and power domains. |
| 14 | VCC | +5V supply rail - decoupling required within 10mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free 3-STATE activation | Ensures zero bus contention during power sequencing - eliminates need for external reset coordination. |
| Latchup protection | Guaranteed per JEDEC JESD78 - withstands >300mA latchup current without failure. |
| Hot-insertion tolerance | Nondestructive operation when inserted into live backplanes - no external current limiting required. |
| Low dynamic ICC | ICCD ≤ 0.1mA/MHz - minimizes switching noise and supply ripple in dense PCB layouts. |
Applications
| Industrial Backplane Interface | Memory Address Buffering |
|---|---|
Use Scenario: Isolating CPU address lines from multiple peripheral slots on a modular PLC rack. IC Role / Device Role / Timing Role: Quad buffer provides channelized 3-STATE control to prevent address bus conflicts during slot hot-swap. Use Value: Sub-5ns propagation and <6.2ns disable time ensure deterministic bus arbitration without added glue logic. | Use Scenario: Driving 16-bit address bus to SRAM and EPROM in an embedded controller with limited I/O drive strength. IC Role / Device Role / Timing Role: Non-inverting buffer amplifies microcontroller address outputs while supporting simultaneous chip-select gating. Use Value: 64mA sink capability handles fanout to 10+ TTL loads per line without signal degradation. |
| Legacy System Bus Extension | Test Equipment Signal Routing |
Use Scenario: Extending ISA or VME bus segments between daughterboards with voltage-level consistency. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer maintaining TTL-compatible VIH/VIL thresholds across long traces. Use Value: Guaranteed 2.0V VIH and 0.8V VIL ensure reliable recognition of marginal logic edges in noisy industrial enclosures. | Use Scenario: Multiplexing DUT signals to multiple measurement instruments in automated test fixtures. IC Role / Device Role / Timing Role: Channel-isolated 3-STATE buffer enables software-controlled signal path selection without hardware reconfiguration. Use Value: Independent OE pins per channel allow precise, contention-free routing of up to four signals under microcontroller control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT125DBR | TI version in SSOP-14; identical AC/DC specs but different thermal resistance (θJA = 110°C/W vs 130°C/W). | SSOP footprint requires PCB redesign; same functional behavior in 5V bus systems. | Preferred for new designs requiring TI's extended lifecycle support and RoHS-6 compliance. |
| 74LVT125PW | NXP variant in TSSOP-14; operates at 2.7–3.6V only - not 5V compatible. | Requires system-level voltage translation if interfacing with 5V peripherals. | Only suitable where entire system uses 3.3V logic; not drop-in for 5V 74ABT125CSJ designs. |
Compared with SN74ABT125DBR and 74LVT125PW, the 74ABT125CSJ offers native 5V operation and EIAJ SOP-14 packaging optimized for through-hole-compatible reflow processes - making it ideal for industrial upgrades of legacy 74LS-based systems without layout change.
Availability
74ABT125CSJ is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory address buffering, and legacy bus extension requiring stable component supply and long-term obsolescence management.
Supply support for 74ABT125CSJ 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its ABT logic family remains widely supported in industrial design libraries.
The 74ABT125CSJ belongs to Fairchild's Advanced BiCMOS Technology (ABT) logic series, engineered for high-speed, low-noise 5V bus interfacing with enhanced drive strength and robustness in electrically noisy environments.
FAQ
What is the maximum operating temperature range for the 74ABT125CSJ?
The 74ABT125CSJ is rated for operation from –40°C to +85°C ambient temperature, meeting industrial-grade environmental requirements. This range is validated per the Recommended Operating Conditions table in the official datasheet Rev. 1.4.0, and applies specifically to the M14D EIAJ SOP package variant. Thermal derating is not required within this range.
Does the 74ABT125CSJ support hot insertion without external protection circuitry?
Yes, the 74ABT125CSJ includes nondestructive hot insertion capability as a guaranteed feature per its datasheet. This is enabled by internal current-limiting and latchup protection circuitry, allowing safe insertion into live 5V backplanes without external series resistors or TVS diodes - confirmed in the Features section of Rev. 1.4.0.
What is the pin configuration difference between 74ABT125CSJ and 74ABT125CSC?
The 74ABT125CSJ uses EIAJ TYPE II SOP-14 (M14D), while 74ABT125CSC uses JEDEC MS-012 SOIC-14 (M14A). Both share identical pinout numbering and function mapping, but differ in package width (5.3mm vs 3.9mm) and lead pitch (1.27mm vs 1.27mm). Footprint land patterns are not interchangeable due to body width and standoff height differences.
Can the 74ABT125CSJ drive standard TTL loads directly?
Yes, the 74ABT125CSJ can drive up to 10 standard TTL loads per output, verified by its 64mA sink and 32mA source capability at VOH ≥ 2.0V and VOL ≤ 0.55V under VCC = 4.5V–5.5V. This exceeds the 1.6mA/0.4mA requirement of legacy 74LS TTL, enabling direct replacement without pull-up resistors or buffers.
Is the 74ABT125CSJ pin-compatible with the 74F125 or 74LS125?
No - while functionally similar as quad 3-STATE buffers, the 74ABT125CSJ has different DC electrical characteristics (e.g., VIH = 2.0V vs 74F125's 2.0V but higher ICC), AC timing (sub-5ns vs ~8ns), and output drive strength. Pinout matches the industry-standard 14-pin buffer layout (1–2–3…), but substitution requires validation of timing margins and bus loading in the target system.
74ABT125CSJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ABT
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-SOP
74ABT125CSJ FAQ
1.How can I place an order for 74ABT125CSJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT125CSJ 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 74ABT125CSJ reliable?
The price and inventory of 74ABT125CSJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT125CSJ is usually 5 days.
3.What payment methods are accepted for 74ABT125CSJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT125CSJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT125CSJ?
74ABT125CSJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT125CSJ 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 74ABT125CSJ?
For technical support, including 74ABT125CSJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT125CSJ requirements.
6.How does Aetrix verify that 74ABT125CSJ is sourced from the original manufacturer or authorized distributors?
All 74ABT125CSJ 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 74ABT125CSJ meets industry standards.
7.What is the process for return or replacement of 74ABT125CSJ?
All 74ABT125CSJ units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT125CSJ, 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 74ABT125CSJ part is unused and in its original packaging.
Return procedure for 74ABT125CSJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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