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Texas Instruments CD74HC126M96
- Part No.:
- CD74HC126M96
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HC126M96.pdf
- Description:
- IC BUFFER NON-INVERT 6V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,275
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Product details
Overview
CD74HC126M96 from Texas Instruments is a quadruple 3-state buffer IC performing Y = A logic in positive polarity, operating across 2 V to 6 V supply, supporting –55°C to +125°C ambient, with propagation delay as low as 17 ns at 6 V and 50 pF load, used for bidirectional bus enable control in industrial control and instrumentation systems.
For engineers reviewing the CD74HC126M96 datasheet, CD74HC126M96 pinout, CD74HC126M96 application, or CD74HC126M96 equivalent, key selection criteria include 3-state output drive capability (±7.8 mA), input transition time compliance (≤400 ns at 6 V), thermal resistance (RθJA = 133.6°C/W), and SOIC-14 package compatibility with automated SMT assembly.
Technical Context
This device implements four independent CMOS buffer channels, each with dedicated active-low output enable (OE) control and standard CMOS inputs. Each channel replicates input A to output Y when OE is low, and presents high-impedance (Z) when OE is high - enabling bus arbitration without external pull resistors.
The balanced 3-state outputs support symmetrical sourcing/sinking (±7.8 mA at 6 V), while input clamp diodes protect against ±20 mA transient currents. Electrical behavior is defined across three temperature ranges (–55°C to +125°C), with leakage current limited to ±1 µA at 6 V and input capacitance fixed at 10 pF per pin.
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 families without level shifters |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial and military-grade environments |
| Propagation Delay | 17 ns (min) at 6 V, 50 pF - enables reliable timing in sub-30 MHz digital control paths |
| Output Drive | ±7.8 mA at 6 V - sufficient to drive 10 LSTTL loads or light capacitive buses ≤70 pF |
| Input Capacitance | 10 pF - minimizes loading on upstream drivers and preserves signal edge integrity |
| Three-State Leakage | ±10 µA max at 6 V - ensures stable high-Z state under worst-case voltage/temperature conditions |
| Power Dissipation Cap. | 30 pF per gate - used to calculate dynamic power consumption in clocked applications |
Pinout & Package
CD74HC126M96 uses a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, with standard JEDEC-compliant lead pitch (1.27 mm) and RoHS-compliant NiPdAu/Sn lead finish, rated MSL Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 (OE) | Active-Low Output Enable | Controls individual channel Z-state; low = enabled (Y = A), high = high-impedance |
| 2, 5, 9, 12 (A) | Buffer Input | Standard CMOS input; must be terminated to VCC or GND if unused |
| 3, 6, 8, 11 (Y) | 3-State Output | Drives bus or downstream logic; floats to high-Z when corresponding OE is high |
| 7 (GND) | Ground Reference | Primary return path for all I/O and supply currents; requires low-inductance PCB connection |
| 14 (VCC) | Positive Supply | Single power rail for all four buffers; requires local 0.1 µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple Independent Buffers | Four isolated Y = A channels allow selective bus segment control without crosstalk |
| 3-State Output Architecture | Enables multi-driver shared-bus operation with no contention during disable states |
| Wide Supply Range (2–6 V) | Permits interoperability between 2.5 V, 3.3 V, and 5 V subsystems in mixed-voltage designs |
| High Fanout Capability | Supports up to 10 LSTTL loads per output - reduces need for additional buffering stages |
| Low Power CMOS Design | ICC ≤ 160 µA max at 6 V - cuts static power vs. equivalent LSTTL by >90% in idle states |
Applications
| Industrial Bus Arbitration | Test Equipment Signal Routing |
|---|---|
Use Scenario: Isolating microcontroller GPIO lines from noisy sensor acquisition circuits during calibration cycles. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer enabling/disabling data flow between MCU and ADC/DAC peripherals. Use Value: Prevents back-driving and ground bounce during peripheral power-down while maintaining signal integrity at ≤30 MHz. | Use Scenario: Multiplexing multiple DUT signals onto a single measurement channel in automated test fixtures. IC Role / Device Role / Timing Role: Channel-selectable signal pass-through element controlled by test sequencer logic. Use Value: Eliminates mechanical relay wear and reduces switching latency to <30 ns per channel enable/disable cycle. |
| Military Data Link Interface | Programmable Logic I/O Expansion |
Use Scenario: Enabling/disabling communication paths between FPGAs and legacy MIL-STD-1553 transceivers. IC Role / Device Role / Timing Role: Voltage-level tolerant bus driver with extended temperature operation for avionics backplanes. Use Value: Maintains deterministic timing margins across –55°C to +125°C without derating, meeting DO-254 functional safety constraints. | Use Scenario: Expanding I/O count of CPLD-based control modules where pin resources are constrained. IC Role / Device Role / Timing Role: Glue logic buffer providing configurable output enable for parallel data latching. Use Value: Reduces FPGA I/O utilization by offloading bus isolation, preserving routing resources for critical timing paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC125DR | Identical pinout and function but features active-high OE (vs. active-low OE in CD74HC126M96) | Requires inverted enable logic; unsuitable where OE polarity must match existing schematic net names | Select only if system-level enable signal polarity aligns with SN74HC125's active-high requirement |
| MC74HC126ADTR2G | Same logic function and SOIC-14 package; specified for –40°C to +85°C (vs. –55°C to +125°C) | Limited temperature range excludes use in extended industrial or military deployments | Acceptable for commercial-grade applications where full temperature coverage is not required |
Compared with CD74HC126M96, SN74HC125DR demands enable signal inversion and MC74HC126ADTR2G lacks extended temperature qualification - making CD74HC126M96 the sole choice for designs requiring both active-low OE and –55°C to +125°C operation in a SOIC-14 package.
Availability
CD74HC126M96 is available at Aetrix Electronics and suitable for industrial control, test equipment, avionics interfaces, and programmable logic expansion requiring stable component supply across extended temperature and voltage ranges.
Supply support for CD74HC126M96 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog, logic, and power management technologies.
CD74HC126M96 belongs to TI's HC logic family, designed specifically for low-power, wide-voltage-range digital interfacing in harsh-environment applications where reliability and temperature resilience are critical.
FAQ
What is the maximum capacitive load the CD74HC126M96 can drive while maintaining specified timing?
The CD74HC126M96 is characterized for CL ≤ 50 pF in switching specifications, with typical performance verified up to 70 pF. Driving loads beyond 70 pF may increase propagation delay and transition time beyond datasheet limits - for example, tpd rises from 17 ns (min) to >36 ns at 6 V when CL exceeds 70 pF. Always verify timing margins in final layout with actual trace and load capacitance.
Can unused inputs on the CD74HC126M96 be left floating?
No, unused inputs on the CD74HC126M96 must be tied to VCC or GND. Floating CMOS inputs cause undefined logic states, increased supply current, and potential oscillation due to noise coupling. The datasheet specifies that all unused inputs be terminated - either directly or via 10-kΩ pull-up/down resistors - to maintain stable operation and prevent shoot-through current in internal circuitry.
Does the CD74HC126M96 support hot-swap or live-insertion applications?
The CD74HC126M96 is not rated for hot-swap operation. Its absolute maximum ratings do not include powered insertion stress, and the absence of Ioff (power-off protection) specification means outputs may source/sink current during partial power-up. For live-insertion, use devices explicitly qualified with Ioff and power-off protection, such as TI's SN74AVC series.
What is the recommended bypass capacitor value for the CD74HC126M96 VCC pin?
A 0.1 µF ceramic capacitor is recommended for bypassing the CD74HC126M96 VCC pin, placed as close as possible to pins 14 and 7 (VCC and GND). This value suppresses high-frequency noise generated during output transitions. For systems with broadband noise, TI recommends paralleling with a 1 µF capacitor - but the 0.1 µF unit remains mandatory for effective decoupling at the device level.
How does the CD74HC126M96 behave when VCC is ramped slowly during power-up?
During slow VCC ramp-up, the CD74HC126M96 may enter an undefined state until VCC exceeds the minimum threshold (~1.5 V at 25°C). Inputs and outputs can exhibit metastability or unintended toggling. To ensure predictable initialization, use a power supervisor IC to hold OE high (disable outputs) until VCC stabilizes above 2 V, or implement RC-based power-on reset to delay enable assertion until supply regulation is complete.
CD74HC126M96 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:
- 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:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
CD74HC126M96 FAQ
1.How can I place an order for CD74HC126M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HC126M96 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 CD74HC126M96 reliable?
The price and inventory of CD74HC126M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HC126M96 is usually 5 days.
3.What payment methods are accepted for CD74HC126M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HC126M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HC126M96?
CD74HC126M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HC126M96 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 CD74HC126M96?
For technical support, including CD74HC126M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HC126M96 requirements.
6.How does Aetrix verify that CD74HC126M96 is sourced from the original manufacturer or authorized distributors?
All CD74HC126M96 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 CD74HC126M96 meets industry standards.
7.What is the process for return or replacement of CD74HC126M96?
All CD74HC126M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HC126M96, 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 CD74HC126M96 part is unused and in its original packaging.
Return procedure for CD74HC126M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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