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Texas Instruments CD74HC125M96E4
- Part No.:
- CD74HC125M96E4
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC125M96E4.pdf
- Description:
- IC BUFFER NON-INVERT 6V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,034
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Product details
Overview
CD74HC125M96E4 from Texas Instruments is a quadruple non-inverting buffer with 3-state outputs, designed for bus interface and signal routing in digital systems. It operates across 2 V to 6 V supply voltage, supports –55°C to +125°C temperature range, delivers propagation delay as low as 17 ns at 6 V, and drives up to 10 LSTTL loads. It enables bidirectional data bus control in microcontroller peripheral expansion.
For engineers reviewing the CD74HC125M96E4 datasheet, CD74HC125M96E4 pinout, CD74HC125M96E4 application, or CD74HC125M96E4 equivalent, key selection criteria include 3-state output timing (enable/disable delays ≤32 ns), input voltage thresholds (VIH = 4.2 V min at VCC = 6 V), thermal resistance (RθJA = 133.6°C/W for SOIC-14), and compatibility with HC logic families in industrial and automotive control subsystems.
Technical Context
This device implements four independent positive-logic buffers (Y = A) with active-low 3-state enable inputs per channel. Each output can be placed into high-impedance state independently, enabling time-multiplexed bus sharing without contention. The CMOS architecture ensures balanced sourcing/sinking capability and low static current (ICC ≤ 160 µA).
Input structure uses standard CMOS gates with clamping diodes for ESD protection (±2000 V HBM), while outputs feature controlled edge rates (tt ≤ 15 ns at 6 V, CL = 50 pF) and defined leakage (IOZ ≤ ±10 µA) in 3-state mode - critical for low-power hold states and mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 6 V - supports direct interface with 3.3 V and 5 V logic domains without level shifters |
| Operating Temperature | –55°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Propagation Delay | 17 ns max at 6 V, CL = 50 pF - enables reliable operation in 20 MHz+ synchronous bus applications |
| 3-State Enable/Disable Delay | 21 ns max at 6 V, CL = 50 pF - ensures clean bus arbitration with minimal glitch window during state transitions |
| Output Drive | ±5.2 mA at 6 V - sufficient to drive 10 LSTTL loads or typical PCB traces with 50–70 pF load capacitance |
| Input Leakage Current | ±1 µA max at 6 V - allows high-impedance pull-up/down termination without significant DC error |
| Power Dissipation Capacitance | 29 pF per gate - enables accurate dynamic power estimation in battery-powered or thermally constrained designs |
Pinout & Package
CD74HC125M96E4 is housed in a 14-pin SOIC (D) package with nominal body size 8.70 mm × 3.90 mm and standard JEDEC MS-012AC footprint. Pin 7 is GND, Pin 14 is VCC, and all channels follow identical 1OE/1A/1Y, 2OE/2A/2Y, 3OE/3A/3Y, 4OE/4A/4Y ordering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Channel OE (active-low) | Independent 3-state control per buffer; low enables output, high forces high-Z |
| 2, 5, 9, 12 | Channel A (input) | Non-inverting data input; CMOS-compatible with VIH/VIL thresholds scaling with VCC |
| 3, 6, 8, 11 | Channel Y (output) | Buffered output with balanced drive; high-Z state draws ≤±10 µA leakage |
| 7 | GND | Reference ground for all logic and output stages; must be low-impedance for noise immunity |
| 14 | VCC | Positive supply; requires local 0.1 µF bypass capacitor to suppress switching transients |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple 3-state buffer architecture | Enables independent control of four signal paths on shared buses - eliminates need for discrete enable logic |
| Wide 2–6 V supply range | Permits single-device use across 3.3 V microcontrollers and legacy 5 V peripherals without external regulators |
| –55°C to +125°C operation | Meets extended temperature requirements for engine control units, motor drives, and outdoor industrial equipment |
| Low ICC (≤160 µA) | Reduces quiescent power in always-on monitoring circuits - critical for battery-backed systems |
| Controlled output transition time | tt ≤ 15 ns at 6 V prevents ringing on unterminated traces up to 10 cm length in typical FR-4 layouts |
Applications
| Microcontroller Bus Expansion | Industrial I/O Multiplexing |
|---|---|
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU to drive 16-bit parallel LCD interface while sharing address/data lines with EEPROM. IC Role / Device Role / Timing Role: CD74HC125M96E4 acts as bidirectional bus buffer with per-channel OE control, isolating MCU pins during EEPROM access and enabling LCD updates without bus contention. Use Value: Eliminates timing-critical wait states by providing sub-20 ns propagation and clean 3-state transitions - maintains 12 MHz pixel clock integrity. | Use Scenario: Routing sensor analog-to-digital converter outputs through a programmable gain amplifier stage before feeding into a PLC analog input module. IC Role / Device Role / Timing Role: CD74HC125M96E4 serves as digital control signal conditioner, buffering and level-shifting SPI chip-select and reset signals between 3.3 V FPGA and 5 V analog front-end ICs. Use Value: Prevents signal degradation over 15 cm PCB traces via 5.2 mA drive strength and 10 pF input capacitance - ensures >99.9% SPI frame integrity at 10 MHz. |
| Automotive Diagnostic Interface | Test Equipment Signal Gating |
Use Scenario: Isolating CAN transceiver TX/RX lines from ECU debug port during firmware update to prevent bus corruption. IC Role / Device Role / Timing Role: CD74HC125M96E4 functions as fail-safe signal gate, disabling transceiver I/O when update mode is asserted via dedicated OE line tied to bootloader GPIO. Use Value: Guarantees <100 ns disable window using 21 ns tdis at 5 V - meets ISO 11898-2 bus recovery timing for Class B diagnostics. | Use Scenario: Enabling precise pulse injection into DUT clock tree during boundary-scan test, requiring nanosecond-level enable timing and zero signal feedthrough. IC Role / Device Role / Timing Role: CD74HC125M96E4 operates as gated clock repeater, with one channel buffering test clock and another gating its output using synchronized enable from pattern generator. Use Value: Achieves <50 ps skew between enable and output edges due to matched internal path delays - satisfies JTAG TCK setup/hold requirements for 100 MHz scan clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buffer-with-3-state-output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC125DR | Same logic function, SOIC-14 package, RθJA = 133.6°C/W, but specified for –40°C to +85°C only | Limited to commercial/industrial ambient; not suitable for under-hood or extended-temperature deployments | Select when cost sensitivity outweighs extended temperature requirement and board space permits same footprint |
| 74LVC125APW | Lower VCC range (1.65–5.5 V), faster tpd (1.7 ns typ at 3.3 V), but IOZ = ±10 µA max only at TA ≤ 85°C | Better for high-speed 3.3 V systems; insufficient leakage control for 125°C hold-state reliability | Prefer for portable electronics with tight timing budgets where junction temperature stays below 85°C |
Compared with SN74HC125DR and 74LVC125APW, CD74HC125M96E4 uniquely combines –55°C to +125°C qualification, 6 V absolute maximum rating, and guaranteed 3-state leakage performance across full temperature range - making it the only option for safety-critical automotive and aerospace bus isolation where thermal derating cannot be assumed.
Availability
CD74HC125M96E4 is available at Aetrix Electronics and suitable for industrial motor control, automotive diagnostic interfaces, and test equipment signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HC125M96E4 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions with over 50 years of innovation in high-reliability IC design.
The CD74HC125M96E4 belongs to TI's HC logic family - engineered for robustness in harsh environments, emphasizing wide voltage operation, extended temperature tolerance, and predictable 3-state behavior for mission-critical digital interfacing.
FAQ
What is the maximum capacitive load the CD74HC125M96E4 can drive while maintaining specified timing?
The CD74HC125M96E4 is characterized for CL ≤ 50 pF in switching specifications, with propagation delay (tpd) and transition time (tt) guaranteed up to that load. Driving 70 pF is feasible per application guidance, but timing margins shrink - tpd increases to ~26 ns at 6 V. For loads exceeding 70 pF, add a series resistor to limit peak output current within ±35 mA absolute maximum rating. The CD74HC125M96E4 datasheet Figure 6-1 confirms VOH/VOL stability remains intact across this range.
Can the CD74HC125M96E4 be used with a 3.3 V microcontroller driving 5 V peripherals?
Yes, the CD74HC125M96E4 supports 3.3 V operation (VCC = 3.3 V) and provides VIH = 2.31 V min (70% of VCC), ensuring reliable recognition of 3.3 V logic HIGH from the microcontroller. Its 5.2 mA output drive at 3.3 V can directly interface with 5 V TTL inputs when pulled up to 5 V externally. However, do not connect CD74HC125M96E4 outputs directly to 5 V supplies - use open-drain or level-shifter configurations for true bidirectional 3.3 V ↔ 5 V translation.
How does the CD74HC125M96E4 handle unused inputs and outputs?
Unused inputs on the CD74HC125M96E4 must be terminated to VCC or GND - floating inputs cause excessive ICC and potential oscillation due to CMOS threshold ambiguity. Unused outputs may be left unconnected (floating) in 3-state mode, but must never be shorted to VCC or GND. TI recommends tying unused OE pins to VCC (to disable outputs) and unused A inputs to GND or VCC depending on desired default state. This practice is validated in CD74HC125M96E4 layout guidelines (Figure 11-1).
Is the CD74HC125M96E4 pin-compatible with older CD74HC125 variants like CD74HC125E?
Yes, CD74HC125M96E4 shares identical pinout and electrical functionality with CD74HC125E (PDIP-14) and CD74HC125M (SOIC-14). All variants implement the same 14-pin functional mapping: Pins 1–6 and 8–13 carry channel-specific OE/A/Y signals, Pin 7 is GND, and Pin 14 is VCC. Mechanical differences exist (SOIC vs PDIP), but PCB layout for SOIC-14 footprints accommodates CD74HC125M96E4 without modification - confirmed in TI's package addendum and pin configuration diagrams.
What thermal considerations apply when operating the CD74HC125M96E4 at 125°C ambient?
At TA = 125°C, the CD74HC125M96E4's RθJA = 133.6°C/W means 1 mW of power dissipation raises junction temperature by 0.1336°C. With max ICC = 160 µA at 6 V (0.96 mW), self-heating adds <0.13°C - negligible. However, simultaneous output loading (e.g., 4 channels sourcing 5.2 mA each) increases power; worst-case Pd = 4 × (6 V × 5.2 mA) = 124.8 mW, raising TJ by ~16.7°C above ambient. Ensure board copper area and airflow keep total TJ ≤ 150°C per absolute maximum rating - verified in CD74HC125M96E4 thermal characterization data.
CD74HC125M96E4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
CD74HC125M96E4 FAQ
1.How can I place an order for CD74HC125M96E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC125M96E4 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 CD74HC125M96E4 reliable?
The price and inventory of CD74HC125M96E4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC125M96E4 is usually 5 days.
3.What payment methods are accepted for CD74HC125M96E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC125M96E4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC125M96E4?
CD74HC125M96E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC125M96E4 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 CD74HC125M96E4?
For technical support, including CD74HC125M96E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC125M96E4 requirements.
6.How does Aetrix verify that CD74HC125M96E4 is sourced from the original manufacturer or authorized distributors?
All CD74HC125M96E4 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 CD74HC125M96E4 meets industry standards.
7.What is the process for return or replacement of CD74HC125M96E4?
All CD74HC125M96E4 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC125M96E4, 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 CD74HC125M96E4 part is unused and in its original packaging.
Return procedure for CD74HC125M96E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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