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Renesas 74AC125P-E
- Part No.:
- 74AC125P-E
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
74AC125P-E.pdf
- Description:
- QUAD BUFFER/LINE DRIVER
- Quantity:
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- Shipping:
Inventory:1,800
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Product details
Overview
74AC125P-E from Renesas Electronics is a quad 3-state buffer/line driver IC used for memory address driving, clock distribution, and bus-oriented transmitter/receiver functions in TTL- and CMOS-compatible digital systems. It operates from 2 V to 6 V, delivers ±24 mA output drive, features propagation delays as low as 5.0 ns at 5 V, and supports industrial temperature range (–40°C to +85°C).
For engineers reviewing the 74AC125P-E datasheet, 74AC125P-E pinout, 74AC125P-E application, or 74AC125P-E equivalent, this page provides verified functional identity, DIP-14 package mapping, truth-table–validated 3-state control logic, DC/AC electrical specifications across voltage/temperature, and direct alternatives for bus buffering upgrades.
Technical Context
The 74AC125P-E implements four independent non-inverting buffers, each with active-low 3-state enable (E̅) controlling high-impedance output. Its AC characteristics are specified at CL = 50 pF and include tPLH/tPHL ≤ 7.5 ns (max) at VCC = 5.0 V, and tZH/tZL ≤ 8.0 ns (max) for enable timing.
It uses advanced CMOS technology with TTL-compatible input thresholds only in the HD74ACT125 variant - the 74AC125P-E (HD74AC125) has CMOS-input thresholds (VIH ≥ 2.1 V at VCC = 3.0 V), ensuring compatibility with both 3.3 V and 5 V logic families while maintaining low ICC (≤ 80 µA max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage board designs including 3.3 V and 5 V logic domains. |
| Output Drive Current | ±24 mA - sufficient to directly drive standard TTL loads or multiple CMOS inputs without external buffers. |
| Propagation Delay | ≤ 7.5 ns at VCC = 5.0 V, CL = 50 pF - enables reliable operation in high-speed address/data bus applications up to ~100 MHz. |
| 3-State Enable Time | tZH/tZL ≤ 8.0 ns - ensures fast bus turnaround in bidirectional data transfer protocols. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation environments. |
| Input Thresholds | VIH = 2.1 V (min) at VCC = 3.0 V; VIL = 0.9 V (max) - CMOS-compatible thresholds, not TTL-compatible. |
| Quiescent Supply Current | ≤ 80 µA - ultra-low static power for battery-backed or energy-sensitive systems. |
Pinout & Package
Dual In-line Package (DIP-14), through-hole mounting, 2.54 mm pitch, JEDEC standard DP-14 footprint (19.20 mm × 6.30 mm body size). RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Data Input (D) | Four independent logic inputs; each controls corresponding output when enable is active. |
| 2, 5, 11, 14 | 3-State Enable (E̅) | Active-low control per channel; drives output to high-impedance when high. |
| 3, 6, 12, 9 | Output (O) | Non-inverting buffered outputs; each sinks or sources up to 24 mA. |
| 7 | GND | Ground reference for all inputs, outputs, and internal circuitry. |
| 14 | VCC | Positive supply rail (2–6 V); decoupling capacitor required near pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent 3-state buffers | Enables selective isolation of four signal paths on shared buses without contention. |
| CMOS-input voltage thresholds | Ensures correct logic interpretation across 3.3 V and 5 V systems without level-shifting circuitry. |
| High-output current (±24 mA) | Drives 10+ TTL loads or long PCB traces directly, reducing component count in address/data routing. |
| Low propagation delay (≤7.5 ns) | Maintains timing margins in synchronous bus architectures with >100 MHz clock domains. |
| Industrial temperature range | Validated operation from –40°C to +85°C supports deployment in factory automation and outdoor electronics. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving multiplexed address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting buffer with per-channel 3-state control isolates unselected memory chips during read/write cycles. Use Value: Prevents bus contention and reduces address setup/hold time violations via sub-8 ns propagation delay and fast enable/disable timing. |
Use Scenario: Distributing a system clock signal to multiple peripheral ICs (e.g., ADCs, DACs, UARTs) while maintaining edge integrity. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer stage that fans out one clock source without loading the oscillator. Use Value: Delivers clean, low-jitter clock edges with ±24 mA drive to overcome capacitive loading of long traces or multiple inputs. |
| Parallel Data Bus Transceiver | Legacy Peripheral Interface |
Use Scenario: Bidirectional data path between an MCU and parallel LCD controller or printer interface. IC Role / Device Role / Timing Role: Direction-controlled buffer using paired enables to manage data flow direction on shared 8-bit lines. Use Value: Eliminates need for discrete transceivers; 3-state outputs allow seamless handshaking and bus arbitration in half-duplex mode. |
Use Scenario: Interfacing modern microcontrollers with legacy parallel peripherals (e.g., EPROM programmers, ISA-style I/O cards). IC Role / Device Role / Timing Role: Level-translation and drive-strengthening buffer for 5 V tolerant interfaces operating at 3.3 V logic levels. Use Value: Bridges voltage domain gaps and meets legacy timing requirements (e.g., <10 ns access windows) without external logic. |
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 | Identical AC/DC specs and pinout; manufactured by Texas Instruments; same DIP-14 package (JEDEC MS-001). | No functional difference; validated for identical industrial temperature and voltage ranges. | Select when TI-sourced supply chain alignment or dual-sourcing strategy is required. |
| 74VHC125N | Higher VIH (≥3.5 V at VCC = 4.5 V); slightly slower max tPLH (8.5 ns); lower ICC (≤ 2 µA typical). | Better suited for ultra-low-power 5 V systems but less robust for 3.3 V interfacing due to higher input threshold. | Prefer for battery-powered 5 V applications where static current dominates; avoid for mixed 3.3/5 V bus use. |
Compared with 74AC125P-E, SN74AC125N offers full drop-in replacement capability with identical timing and drive, while 74VHC125N trades speed and 3.3 V compatibility for significantly lower quiescent current - making it suitable only in pure 5 V, low-duty-cycle contexts.
Availability
74AC125P-E is available at Aetrix Electronics and suitable for memory address buffering, clock distribution networks, and parallel data bus transceiver applications requiring stable component supply across industrial temperature ranges and multi-voltage logic domains.
Supply support for 74AC125P-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and logic devices for industrial, automotive, and infrastructure markets.
The HD74AC125 series belongs to Renesas' legacy high-speed CMOS logic family, designed specifically for reliable bus interface and signal conditioning in industrial control, test equipment, and legacy system upgrades.
FAQ
What is the exact logic function of the 74AC125P-E?
The 74AC125P-E contains four independent non-inverting buffers, each with an active-low 3-state enable input (E̅). When E̅ is low, the output follows the input (O = D); when E̅ is high, the output enters high-impedance state. This behavior is confirmed in the truth table on page 2 of the Renesas HD74AC125 datasheet Rev.3.00.
Does the 74AC125P-E support 3.3 V operation?
Yes, the 74AC125P-E is fully specified for 3.3 V operation: VCC range includes 3.0 V ±0.3 V, VIH minimum is 2.1 V, VIL maximum is 0.9 V, and all AC parameters (e.g., tPLH ≤ 10.0 ns) are guaranteed across –40°C to +85°C at this voltage - enabling direct use in mixed 3.3 V/5 V systems.
Is the 74AC125P-E pin-compatible with the 74ACT125 series?
No - although both share identical pinout and package (DIP-14), the 74AC125P-E has CMOS-input thresholds (VIH ≥ 2.1 V at VCC = 3.0 V), whereas the 74ACT125 has TTL-compatible inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V). Substituting them requires verifying input voltage compatibility in the host design.
What is the maximum capacitive load the 74AC125P-E can drive reliably?
The 74AC125P-E AC characteristics are characterized at CL = 50 pF, and its output drive (±24 mA) supports heavier loads. However, propagation delay increases with capacitance; for loads >100 pF, layout optimization (short traces, ground plane) and verification against timing budgets using the 74AC125P-E's published tPLH/tPHL curves is required.
Where is the official datasheet for the 74AC125P-E located?
The official datasheet for the 74AC125P-E is Renesas document REJ03D0246–0300 (Rev.3.00, Nov.12.2004), titled "HD74AC125/HD74ACT125 Quad Buffer/Line Driver with 3-State Output". It is archived on the Renesas website under legacy logic product documentation and remains the authoritative source for 74AC125P-E specifications.
74AC125P-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:
- -
74AC125P-E FAQ
1.How can I place an order for 74AC125P-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC125P-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 74AC125P-E reliable?
The price and inventory of 74AC125P-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC125P-E is usually 5 days.
3.What payment methods are accepted for 74AC125P-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC125P-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC125P-E?
74AC125P-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC125P-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 74AC125P-E?
For technical support, including 74AC125P-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC125P-E requirements.
6.How does Aetrix verify that 74AC125P-E is sourced from the original manufacturer or authorized distributors?
All 74AC125P-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 74AC125P-E meets industry standards.
7.What is the process for return or replacement of 74AC125P-E?
All 74AC125P-E units undergo pre-shipment inspection (PSI). If there is an issue with 74AC125P-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 74AC125P-E part is unused and in its original packaging.
Return procedure for 74AC125P-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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