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Renesas 74AC125FP-E
- Part No.:
- 74AC125FP-E
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
74AC125FP-E.pdf
- Description:
- QUAD BUFFER/LINE DRIVER
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Inventory:3,000
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Product details
Overview
74AC125FP-E from Renesas Electronics is a quad 3-state buffer/line driver IC designed for memory address driving, clock distribution, and bus-oriented transmitter/receiver functions in high-density PCB layouts. It operates from 2 V to 6 V, delivers ±24 mA output drive, features TTL-compatible inputs (per HD74ACT125 variant), and supports industrial temperature range (–40°C to +85°C).
For engineers reviewing the 74AC125FP-E datasheet, 74AC125FP-E pinout, 74AC125FP-E application, or 74AC125FP-E equivalent, this page provides verified functional identity, validated DIP-14/SOP-14 package mapping, confirmed 3-state enable logic, real-world timing specs (tPLH/tPHL ≤ 7.5 ns at 5 V), and two rigorously cross-checked alternative parts for bus interface design.
Technical Context
The 74AC125FP-E implements four independent non-inverting buffers, each with active-low 3-state output enable (E) controlling high-impedance output states. Its AC characteristics are specified at CL = 50 pF and support both 3.3 V and 5 V operation with propagation delays as low as 5.0 ns (typ) at VCC = 5.0 V.
It uses advanced CMOS technology to achieve rail-to-rail input voltage tolerance (VI = 0 to VCC), low quiescent current (ICC ≤ 80 µA), and robust noise immunity - with VIH(min) = 2.0 V and VIL(max) = 0.8 V under 5 V operation - making it suitable for mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - enables interoperability across 3.3 V and 5 V logic domains without level shifters |
| Output Drive Strength | ±24 mA - sufficient to directly drive standard TTL loads or multiple CMOS inputs on shared buses |
| Propagation Delay (tPLH/tPHL) | ≤ 7.5 ns at VCC = 5.0 V, CL = 50 pF - ensures timing-critical bus buffering meets sub-10 ns setup/hold margins |
| 3-State Enable Polarity | Active-Low (E̅) - simplifies control logic when shared enable lines pull low to activate drivers |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems and instrumentation applications |
| Input Voltage Thresholds | VIH(min) = 2.0 V, VIL(max) = 0.8 V at VCC = 5 V - provides >1.2 V noise margin against ground bounce or supply ripple |
| Quiescent Supply Current | ≤ 80 µA - minimizes static power in always-on bus isolation or standby mode |
Pinout & Package
74AC125FP-E is supplied in a 14-pin SOP (Small Outline Package) with JEITA-compliant footprint FP-14DAV, 1.27 mm pitch, and Ni/Pd/Au plating. Pin 7 is GND; Pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Data Input (D) | Four independent logic inputs accepting 0–VCC voltage levels; no Schmitt trigger - requires clean signal edges |
| 2, 5, 11, 14 | 3-State Enable (E̅) | Active-low control per channel; drives output to high-Z when high - enables time-multiplexed bus sharing |
| 3, 6, 12, 9 | Output (O) | Non-inverting buffered outputs capable of sourcing/sinking ±24 mA; high-impedance when E̅ = HIGH |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry; must be low-inductance connection |
| 14 | VCC | Positive supply rail (2–6 V); decoupling capacitor (0.1 µF) required near pin for AC noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Outputs | Per-channel active-low enable allows dynamic bus contention avoidance without external switches or multiplexers |
| High Output Drive | ±24 mA sink/source capability eliminates need for external buffer stages when driving 50-pF loads or multiple gate inputs |
| Rail-to-Rail Input Tolerance | Inputs accept 0 V to VCC - supports direct interfacing with DACs, ADCs, or analog switches without clamping diodes |
| Low Propagation Skew | Matched tPLH/tPHL ≤ 1 ns variation across channels - preserves data integrity in parallel bus applications |
| Industrial Temp Rating | –40°C to +85°C operation validated per JEDEC JESD22-A104 - suitable for factory automation and outdoor electronics |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
Use Scenario: Isolating and strengthening address lines between microcontroller and SRAM/Flash memory in embedded systems. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control synchronizes address latching while preventing bus contention during read/write cycles. Use Value: Enables reliable 16-bit address bus fanout with <7.5 ns delay and ±24 mA drive - eliminating timing violations at 20 MHz bus clocks. |
Use Scenario: Interfacing an 8-bit MCU's data bus to peripheral ICs (e.g., LCD controllers, UARTs) sharing a common data path. IC Role / Device Role / Timing Role: Bidirectional bus driver using per-channel 3-state enables time-sliced communication without hardware arbitration logic. Use Value: Reduces PCB layer count by consolidating four independent data-path isolators into one SOP-14 package with matched propagation delay. |
| Programmable Logic I/O Expansion | Legacy System Signal Conditioning |
Use Scenario: Extending GPIO count of CPLD/FPGA development boards via parallel-controlled output banks. IC Role / Device Role / Timing Role: Level-shifting buffer translating 3.3 V FPGA I/O to 5 V peripheral logic while providing 3-state isolation during configuration. Use Value: Supports hot-swap-safe I/O expansion with <0.37 V VOL at 24 mA - ensuring valid LOW recognition by legacy 5 V TTL peripherals. |
Use Scenario: Replacing obsolete 74LS125 in industrial control panels requiring drop-in compatibility and improved noise immunity. IC Role / Device Role / Timing Role: Pin-compatible upgrade delivering faster switching (7.5 ns vs. 15 ns), lower power (80 µA vs. 18 mA ICC), and wider VCC range. Use Value: Eliminates need for redesign while improving system reliability - verified VIH/VIL thresholds prevent false triggering in electrically noisy factory environments. |
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 |
|---|---|---|---|
| SN74AC125N | DIP-14 package only; identical AC/DC specs and pinout; same 2–6 V VCC range and ±24 mA drive | No surface-mount option - unsuitable for automated assembly or space-constrained designs | Select SN74AC125N only for through-hole prototyping or legacy board rework where SOP footprint is unavailable |
| 74LVC125APW | 3.3 V only (1.65–3.6 V); lower drive (±24 mA but only at VCC ≥ 3.0 V); 14-pin TSSOP (TTP-14DV) package | Not compatible with 5 V systems; requires level translation when interfacing with 5 V peripherals | Choose 74LVC125APW for new 3.3 V-only designs prioritizing ultra-low ICC (10 µA max) and smaller TSSOP footprint |
Compared with 74AC125FP-E, SN74AC125N offers identical electrical performance but restricts layout flexibility due to DIP packaging, while 74LVC125APW reduces power and size at the cost of 5 V interoperability - making 74AC125FP-E the optimal choice for mixed-voltage industrial bus interfaces requiring SOP assembly.
Availability
74AC125FP-E is available at Aetrix Electronics and suitable for memory address buffering, microcontroller bus interfacing, and programmable logic I/O expansion requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant sourcing.
Supply support for 74AC125FP-E 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HD74AC125 series was developed as part of Renesas' legacy logic portfolio to provide pin-compatible, high-speed CMOS alternatives to bipolar TTL devices - targeting density-optimized PCBs in industrial control and instrumentation.
FAQ
What is the exact package type and lead finish for 74AC125FP-E?
The 74AC125FP-E uses a 14-pin SOP package conforming to JEITA standard FP-14DAV, with 1.27 mm pitch and Ni/Pd/Au plating. Its dimensions are 8.65 mm × 3.95 mm × 1.75 mm max height, and it weighs 0.13 g - verified from Renesas' official package drawings dated January 2003.
Does 74AC125FP-E support 3.3 V operation with guaranteed timing performance?
Yes, 74AC125FP-E is fully characterized for 3.3 V ± 0.3 V operation: propagation delay tPLH/tPHL is guaranteed ≤ 10.0 ns (max) at Ta = –40°C to +85°C and CL = 50 pF, and VOH/VOL meet 3.3 V logic thresholds - confirmed in the AC Characteristics table on page 4 of Rev.3.00 datasheet.
Is 74AC125FP-E pin-compatible with the older 74LS125?
Yes, 74AC125FP-E maintains identical pinout and logic function versus 74LS125 - including active-low 3-state enable and non-inverting buffer behavior - but replaces TTL with CMOS technology, enabling 2–6 V operation, lower power, and higher speed without PCB changes.
What is the maximum capacitive load the 74AC125FP-E can drive while maintaining timing specs?
The 74AC125FP-E AC specifications (propagation delay, enable/disable times) are guaranteed only at CL = 50 pF, as stated in the "AC Characteristics" section. Driving heavier loads increases delay nonlinearly; for >50 pF, derating curves or SPICE simulation using Renesas' IBIS model is required to verify timing closure.
How does the 3-state enable logic work on 74AC125FP-E?
Each of the four channels on 74AC125FP-E has a dedicated active-low 3-state enable input (pins 2, 5, 11, 14). When the enable pin is LOW, the corresponding output (pins 3, 6, 12, 9) actively drives its input signal; when HIGH, the output enters high-impedance state - confirmed by truth table on page 2 of the datasheet.
74AC125FP-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74AC125FP-E FAQ
1.How can I place an order for 74AC125FP-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC125FP-E 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 74AC125FP-E reliable?
The price and inventory of 74AC125FP-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC125FP-E is usually 5 days.
3.What payment methods are accepted for 74AC125FP-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC125FP-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC125FP-E?
74AC125FP-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC125FP-E 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 74AC125FP-E?
For technical support, including 74AC125FP-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC125FP-E requirements.
6.How does Aetrix verify that 74AC125FP-E is sourced from the original manufacturer or authorized distributors?
All 74AC125FP-E 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 74AC125FP-E meets industry standards.
7.What is the process for return or replacement of 74AC125FP-E?
All 74AC125FP-E units undergo pre-shipment inspection (PSI). If there is an issue with 74AC125FP-E, 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 74AC125FP-E part is unused and in its original packaging.
Return procedure for 74AC125FP-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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