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onsemi MM74HC125MTCX
- Part No.:
- MM74HC125MTCX
- Manufacturer:
- onsemi
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MM74HC125MTCX.pdf
- Description:
- IC BUFFER NON-INVERT 6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,164
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Product details
Overview
MM74HC125MTCX from ON Semiconductor is a quad 3-state non-inverting buffer IC designed for bus interface and signal isolation in digital systems. It operates across 2V–6V supply, delivers 13ns typical propagation delay at 4.5V/50pF, supports 15 LS-TTL loads, and features high-impedance outputs controlled by active-high enable inputs. It is used in microcontroller peripheral buses and memory address/data latching.
For engineers reviewing the MM74HC125MTCX datasheet, pinout, applications, or equivalent options, key selection criteria include active-high 3-state control logic, TSSOP-14 package compatibility, guaranteed 25ns max propagation delay over –40°C to +85°C, and CMOS-level input thresholds at 2V/4.5V/6V.
Technical Context
The MM74HC125MTCX implements four independent non-inverting buffers, each with a dedicated active-high 3-state enable (C) input. Its silicon-gate CMOS architecture ensures low static current (≤80µA at 6V) and rail-to-rail output swing while maintaining TTL-compatible drive strength.
Each buffer exhibits matched tPHL/tPLH delay characteristics and defined enable/disable timing (tPZH/tPHZ ≤25ns), enabling synchronized bus release in multi-driver configurations. Input protection diodes clamp to VCC and GND, supporting robust ESD tolerance per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V–6V - Enables direct interfacing with 3.3V and 5V logic domains without level shifters. |
| Propagation Delay (tPLH/tPHL) | 13ns typical / 25ns max at VCC=4.5V, CL=50pF - Ensures timing compliance in 20MHz+ synchronous bus designs. |
| Output Drive Strength | ±7.8mA at VCC=6V - Sufficient to drive 15 LS-TTL loads or ≥100pF bus capacitance with controlled edge rates. |
| 3-State Enable Polarity | Active-HIGH (C input) - Simplifies control logic when shared enable signals originate from active-high GPIOs or decoders. |
| Input Leakage Current | ±1.0µA max at 6V - Minimizes loading on high-impedance sources such as sensor outputs or pull-up networks. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded control and automotive body electronics applications. |
Pinout & Package
MM74HC125MTCX is housed in a 14-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4mm wide, with 0.65mm lead pitch and exposed pad not present. Pin 1 marked via notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Buffer Input (A1–A4) | CMOS-compatible digital inputs accepting 0V–VCC logic levels; internally protected by clamp diodes. |
| 2, 5, 11, 14 | Buffer Output (Y1–Y4) | Push-pull outputs capable of sourcing/sinking ≥7.8mA; enter high-impedance state when corresponding C is LOW. |
| 3, 6, 12, 9 | 3-State Enable (C1–C4) | Active-HIGH control inputs - output Yn enters high-Z only when Cn = HIGH; no internal pull-up/down. |
| 7 | GND | Ground reference for all I/O and internal circuitry; must be low-impedance connection for noise immunity. |
| 14 | VCC | Positive supply rail (2V–6V); bypass capacitor (0.1µF ceramic) required near pin for stable switching operation. |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent 3-state buffers | Four isolated channels allow selective bus segment control without inter-channel crosstalk or contention. |
| Active-high 3-state enable logic | Eliminates need for external inverters when interfacing with active-high enable signals from microcontrollers or PLDs. |
| Low quiescent supply current | ≤80µA at 6V enables use in battery-backed or low-power standby modes without significant current drain. |
| Wide voltage operation (2V–6V) | Supports mixed-voltage system design - e.g., 3.3V MCU controlling 5V peripherals via level-tolerant interface. |
| Input/output ESD protection | Clamp diodes to VCC and GND provide ≥2kV HBM ESD robustness, reducing need for external TVS components. |
Applications
| Microcontroller Bus Expansion | Memory Address Latching |
|---|---|
|
Use Scenario: Expanding GPIO count of an ARM Cortex-M0+ MCU to drive multiple SPI peripherals sharing a common bus. IC Role / Device Role / Timing Role: Isolates MCU pins from bus capacitance; enables/disables peripheral drivers via GPIO-controlled C inputs. Use Value: Prevents bus contention during firmware reconfiguration; maintains signal integrity with 13ns propagation delay and 7.8mA drive. |
Use Scenario: Latching 16-bit address lines from an 8051 derivative to external SRAM during read/write cycles. IC Role / Device Role / Timing Role: Buffers and gates address signals to memory chip select logic using synchronized 3-state control. Use Value: Guarantees setup/hold timing margins with ≤25ns enable/disable delays and rail-to-rail output swing. |
| Digital Logic Level Translation | Test Equipment Signal Gating |
|
Use Scenario: Interfacing a 3.3V FPGA I/O bank to legacy 5V TTL logic in a protocol analyzer subsystem. IC Role / Device Role / Timing Role: Non-inverting buffer with 2V–6V supply tolerance acts as unidirectional level shifter without external biasing. Use Value: Eliminates discrete resistor-divider networks; preserves signal edge rate with <15ns rise/fall time at 4.5V. |
Use Scenario: Enabling/disabling test signals routed to DUT (device under test) during automated functional testing. IC Role / Device Role / Timing Role: Provides precise, low-jitter gating of clock and data lines using synchronized C inputs from test controller. Use Value: Achieves sub-30ns enable/disable transitions for deterministic signal injection windows in high-speed test fixtures. |
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 |
|---|---|---|---|
| SN74HC125PW | Same logic function and pinout; TI part uses 14-pin TSSOP (PW), identical footprint and electrical specs. | No functional difference; qualified for automotive AEC-Q100 Grade 2 (–40°C to +105°C) vs. industrial (–40°C to +85°C). | Select SN74HC125PW if extended temperature range or TI supply chain preference applies. |
| 74VHC125MTCX | Higher speed: 7.5ns typical tPD at 5V; lower ICC (≤2µA), but reduced drive (±8mA) and narrower VCC range (2V–5.5V). | Better for ultra-low-power, high-frequency clock distribution; not suitable for 6V bus interfaces or heavy capacitive loads. | Choose 74VHC125MTCX only when >25MHz operation and sub-5µA quiescent current are mandatory. |
Compared with SN74HC125PW and 74VHC125MTCX, the MM74HC125MTCX offers optimal balance of industrial temperature rating, 6V tolerance, and proven 15 LS-TTL fanout - making it preferred for cost-sensitive, mixed-voltage embedded control where long-term supply stability matters.
Availability
MM74HC125MTCX is available at Aetrix Electronics and suitable for microcontroller bus expansion, memory address latching, and digital logic level translation requiring stable component supply across industrial temperature ranges and multi-year production cycles.
Supply support for MM74HC125MTCX 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
ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensing, and logic solutions for automotive, industrial, and cloud infrastructure markets.
The MM74HC125MTCX belongs to ON Semiconductor's legacy HC logic family, engineered for reliable, low-power digital interfacing in resource-constrained embedded systems with strict cost and thermal budgets.
FAQ
What is the 3-state enable polarity of the MM74HC125MTCX?
The MM74HC125MTCX uses active-HIGH 3-state enable inputs (pins 3, 6, 12, and 9). When the corresponding C input is HIGH, the associated output (Y1–Y4) is driven; when LOW, the output enters high-impedance state. This differs from the MM74HC126, which uses active-LOW enables.
Does the MM74HC125MTCX support 3.3V operation?
Yes, the MM74HC125MTCX is fully specified for operation from 2V to 6V, including 3.3V nominal supply. At VCC = 3.3V, VIH is guaranteed ≥2.1V and VIL ≤1.1V, ensuring compatibility with standard 3.3V CMOS logic families without level shifting.
Can the MM74HC125MTCX drive a 100pF bus capacitance reliably?
Yes - the MM74HC125MTCX delivers ±7.8mA output drive at VCC = 6V and maintains ≤25ns propagation delay into 50pF loads. With proper PCB layout and 0.1µF local decoupling, it reliably drives ≥100pF bus capacitance while meeting timing margins in 10–20MHz digital systems.
Is the MM74HC125MTCX pin-compatible with other 14-pin TSSOP quad buffers?
The MM74HC125MTCX follows standard 14-pin TSSOP pinout per JEDEC MO-153 and is pin-compatible with SN74HC125PW and 74VHC125MTCX. All share identical pin assignments for VCC, GND, A/Y/C signals - enabling drop-in replacement where electrical specs align.
What is the maximum operating temperature specification for the MM74HC125MTCX?
The MM74HC125MTCX is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade specification is validated across all DC and AC parameters in the datasheet, including propagation delay, output drive, and leakage current limits.
MM74HC125MTCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74HC
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MM74HC125MTCX FAQ
1.How can I place an order for MM74HC125MTCX through Aetrix?
Please submit a Request for Quotation (RFQ) for MM74HC125MTCX 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 MM74HC125MTCX reliable?
The price and inventory of MM74HC125MTCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM74HC125MTCX is usually 5 days.
3.What payment methods are accepted for MM74HC125MTCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM74HC125MTCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM74HC125MTCX?
MM74HC125MTCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM74HC125MTCX 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 MM74HC125MTCX?
For technical support, including MM74HC125MTCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM74HC125MTCX requirements.
6.How does Aetrix verify that MM74HC125MTCX is sourced from the original manufacturer or authorized distributors?
All MM74HC125MTCX 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 MM74HC125MTCX meets industry standards.
7.What is the process for return or replacement of MM74HC125MTCX?
All MM74HC125MTCX units undergo pre-shipment inspection (PSI). If there is an issue with MM74HC125MTCX, 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 MM74HC125MTCX part is unused and in its original packaging.
Return procedure for MM74HC125MTCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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