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Renesas 74ACT125TELL-E
- Part No.:
- 74ACT125TELL-E
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
74ACT125TELL-E.pdf
- Description:
- QUAD BUFFER/LINE DRIVER
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Inventory:16,000
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Product details
Overview
74ACT125TELL-E from Renesas Electronics is a quad 3-state buffer/line driver with TTL-compatible inputs, 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, supports –40°C to +85°C industrial temperature range, and features propagation delays as low as 6.5 ns at 5 V.
For engineers reviewing the 74ACT125TELL-E datasheet, 74ACT125TELL-E pinout, 74ACT125TELL-E application, or 74ACT125TELL-E equivalent, this device is selected for bidirectional bus isolation, address buffering in microcontroller systems, and low-skew clock fanout where TTL-level compatibility and 3-state control are required.
Technical Context
The 74ACT125TELL-E implements four independent non-inverting buffers, each with an active-low 3-state enable input (E), enabling precise bus contention control. Its TTL-compatible inputs accept standard 5 V logic thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), ensuring interoperability with legacy TTL and mixed-voltage systems.
Each output provides rail-to-rail swing with VOH ≥ 4.4 V and VOL ≤ 0.37 V under 24 mA load at 5 V, and exhibits matched tPLH/tPHL propagation delays (6.5 ns typ) and fast enable/disable timing (tZH/tHZ ≤ 8.5 ns typ at 5 V), critical for synchronous bus timing integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 6 V - Supports dual-supply system interfacing and 3.3 V/5 V mixed logic domains. |
| Output Drive | ±24 mA - Sinks or sources sufficient current to drive multiple CMOS/TTL loads without external buffers. |
| Propagation Delay | 6.5 ns (typ) at 5 V - Enables reliable operation in 100+ MHz bus clock domains with tight timing margins. |
| Input Compatibility | TTL-compatible - Accepts standard 5 V TTL VIH/VIL thresholds, eliminating level-shifter requirements in legacy designs. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded control, instrumentation, and communications equipment. |
| 3-State Leakage | ±5.0 µA max - Ensures minimal bus leakage during high-impedance state, preventing signal corruption in shared-bus architectures. |
| Package | TSSOP-14 (TTP-14DV) - 5 mm × 4.4 mm footprint with 0.65 mm pitch, optimized for space-constrained PCBs. |
Pinout & Package
TSSOP-14 package (JEDEC MO-153, Renesas code TTP-14DV), 0.65 mm lead pitch, 5.00 mm × 4.40 mm body, Ni/Pd/Au plating, 0.05 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Data Input (D) | Non-inverting input per buffer channel; accepts TTL-compatible logic levels. |
| 2, 5, 11, 14 | 3-State Enable (E) | Active-low control: logic low enables output, high places output in high-impedance state. |
| 3, 6, 12, 9 | Output (O) | Buffered, non-inverted output with ±24 mA drive capability and rail-to-rail swing. |
| 7 | GND | Digital ground reference for all I/O and internal circuitry. |
| 14 | VCC | Positive supply rail (2–6 V); decoupling capacitor required adjacent to pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent 3-state buffers | Enables selective routing of four data paths onto a shared bus without contention or latch-up risk. |
| TTL-compatible input thresholds | Eliminates need for external level translation when interfacing with 5 V TTL, LVTTL, or older microcontrollers. |
| Matched propagation delay (tPLH/tPHL) | Ensures minimal skew between channels-critical for parallel address/data bus integrity. |
| Low 3-state disable time (tLZ = 9.5 ns max) | Reduces bus turnaround latency in half-duplex communication protocols like SPI or custom parallel interfaces. |
| High noise immunity (VNH/VNL ≥ 0.7 V) | Guarantees robust operation in electrically noisy industrial environments with EMI up to 400 mV peak. |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from an 8-bit microcontroller with external memory expansion. IC Role / Device Role / Timing Role: Non-inverting address buffer with 3-state control synchronized to memory read/write strobes. Use Value: Prevents address bus contention during CPU wait states and ensures clean, low-skew address transitions across all 16 lines. |
Use Scenario: Isolating peripheral I/O lines (e.g., GPIO expanders, ADCs) from a shared 8-bit data bus. IC Role / Device Role / Timing Role: Bidirectional bus transceiver controlled by microcontroller port pins. Use Value: Enables dynamic bus sharing among multiple peripherals without hardware redesign or additional logic. |
| Industrial Clock Distribution | Legacy System Signal Conditioning |
Use Scenario: Fanout of a 5 MHz system clock to multiple FPGA configuration ICs and CPLD reset circuits. IC Role / Device Role / Timing Role: Low-jitter, low-skew clock buffer with TTL-compatible input and CMOS output drive. Use Value: Maintains sub-nanosecond inter-channel skew and meets setup/hold timing for synchronous configuration loading. |
Use Scenario: Interfacing modern 3.3 V microcontrollers with legacy 5 V TTL peripherals (e.g., UARTs, display drivers). IC Role / Device Role / Timing Role: Level-adaptive buffer with guaranteed TTL input recognition and full-rail CMOS output swing. Use Value: Eliminates discrete resistor networks or dedicated level shifters while preserving signal integrity and timing margins. |
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 |
|---|---|---|---|
| SN74ACT125DR | TI part in SOIC-14; identical AC/DC specs but different thermal resistance (θJA = 120°C/W vs. Renesas TSSOP θJA = 190°C/W). | Preferred for through-hole prototyping or higher-power dissipation scenarios due to better heat spreading. | Select when board layout allows SOIC footprint and thermal management requires lower junction rise. |
| 74LCX125MTCX | ON Semiconductor part in TSSOP-14; 2.0–3.6 V only, not 5 V tolerant; VIH = 1.5 V min at 3.3 V. | Suitable only for pure 3.3 V systems; incompatible with 5 V TTL input signaling. | Choose only for new 3.3 V-only designs where 5 V tolerance is unnecessary and lower ICC is prioritized. |
Compared with SN74ACT125DR and 74LCX125MTCX, the 74ACT125TELL-E uniquely combines 5 V TTL compatibility, industrial temperature range, and compact TSSOP packaging-making it optimal for retrofitting legacy 5 V systems or space-constrained industrial controllers requiring direct TTL interface support.
Availability
74ACT125TELL-E is available at Aetrix Electronics and suitable for memory address buffering, microcontroller bus isolation, and industrial clock distribution requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ACT125TELL-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 74ACT125TELL-E belongs to Renesas' legacy HD74ACT logic family, engineered for high-speed, low-power, TTL-compatible interface bridging in industrial control and legacy system upgrades.
FAQ
What is the maximum supply voltage rating for the 74ACT125TELL-E?
The 74ACT125TELL-E has an absolute maximum supply voltage (VCC) rating of 7 V, but its recommended operating range is 2 V to 6 V. Operation above 6 V risks permanent damage and violates the device's qualified specifications; sustained use at 6.5 V or higher is not supported per Renesas' DC Characteristics table on page 3 of the datasheet.
Does the 74ACT125TELL-E support 3.3 V logic levels on its inputs?
Yes, the 74ACT125TELL-E supports 3.3 V logic inputs when operated at VCC = 3.3 V, but its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) are specified only for VCC = 4.5–5.5 V. At 3.3 V supply, VIH is 1.9 V min and VIL is 0.9 V max per AC/DC characterization-ensuring reliable recognition of standard 3.3 V CMOS outputs.
What is the thermal resistance (θJA) of the 74ACT125TELL-E in its TSSOP-14 package?
The 74ACT125TELL-E in TTP-14DV (TSSOP-14) package has a typical junction-to-ambient thermal resistance (θJA) of 190°C/W under standard JEDEC JESD51-7 conditions (single-layer 1 oz copper, 1 in² pad). This value assumes no internal thermal vias or enhanced PCB copper; actual performance improves with proper thermal land design and airflow.
Can the 74ACT125TELL-E be used in place of the 74AC125 variant?
Yes, the 74ACT125TELL-E is functionally pin-compatible and electrically interchangeable with the 74AC125 in most applications, but differs critically in input threshold compatibility: the 74ACT125TELL-E guarantees TTL-compatible inputs (VIH = 2.0 V min), whereas the 74AC125 requires CMOS-level inputs (VIH = 3.15 V min at 4.5 V). Substitution is safe only if driving sources meet TTL voltage levels.
Is the 74ACT125TELL-E RoHS compliant and lead-free?
Yes, the 74ACT125TELL-E is RoHS compliant and features lead-free Ni/Pd/Au plating, as confirmed by the "V" suffix in its package code TTP-14DV and Renesas' environmental compliance documentation dated November 2004. The "V" explicitly denotes lead-free termination per JEDEC standards.
74ACT125TELL-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:
- -
74ACT125TELL-E FAQ
1.How can I place an order for 74ACT125TELL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT125TELL-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 74ACT125TELL-E reliable?
The price and inventory of 74ACT125TELL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT125TELL-E is usually 5 days.
3.What payment methods are accepted for 74ACT125TELL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT125TELL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT125TELL-E?
74ACT125TELL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT125TELL-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 74ACT125TELL-E?
For technical support, including 74ACT125TELL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT125TELL-E requirements.
6.How does Aetrix verify that 74ACT125TELL-E is sourced from the original manufacturer or authorized distributors?
All 74ACT125TELL-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 74ACT125TELL-E meets industry standards.
7.What is the process for return or replacement of 74ACT125TELL-E?
All 74ACT125TELL-E units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT125TELL-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 74ACT125TELL-E part is unused and in its original packaging.
Return procedure for 74ACT125TELL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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