My Inquiry
My Account
Texas Instruments CD74HCT126M96
- Part No.:
- CD74HCT126M96
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CD74HCT126M96.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,101
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CD74HCT126M96 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 4.5 V to 5.5 V supply voltage, supports –55°C to +125°C industrial/military temperature range, delivers propagation delay ≤25 ns at 5 V (CL = 50 pF), and features balanced CMOS 3-state outputs enabling bidirectional bus control in microcontroller peripheral interfaces.
For engineers reviewing the CD74HCT126M96 datasheet, CD74HCT126M96 pinout, CD74HCT126M96 application, or CD74HCT126M96 equivalent, key selection criteria include its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), 3-state output leakage ≤±5 µA, fanout capability of 10 LSTTL loads, and SOIC-14 package compatibility with high-density PCB layouts.
Technical Context
This device implements four independent Y = A logic gates with active-low 3-state enable inputs (OE), allowing individual channel control. Each buffer provides true TTL-compatible input thresholds while maintaining CMOS-level power efficiency-ICC ≤ 80 µA at 6 V and TA = 85°C-making it suitable for mixed-voltage system interfacing where legacy TTL signals must drive modern CMOS buses.
The 3-state outputs exhibit symmetrical sourcing/sinking capability (IOH/IOH = ±6 mA at VOH/VOL specifications), with disable timing (tdis) and enable timing (ten) both ≤31 ns at 5 V, ensuring precise bus arbitration in synchronous data transfer applications such as address/data multiplexing in 8-bit microprocessor systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-signal logic rails |
| Propagation Delay | ≤25 ns at 5 V, CL = 50 pF - enables reliable operation in 20-MHz bus systems |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - guarantees robust recognition of TTL-level signals |
| Output Drive | ±6 mA at VOH/VOL - sufficient to drive 10 LSTTL loads without external buffering |
| Operating Temperature | –55°C to +125°C - qualified for extended industrial, automotive, and military environments |
| 3-State Leakage | ±5 µA max - minimizes bus contention current during high-impedance state |
| Power Consumption | ICC ≤ 80 µA at 6 V, 85°C - reduces static power in always-on subsystems |
Pinout & Package
CD74HCT126M96 is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, with standard 1.27-mm pitch and gull-wing leads compatible with automated SMT assembly and IPC-7351B footprint requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 4OE, 3OE, 2OE | Active-low 3-state enable input | Drives corresponding output (Y) into high-Z when low; all four enables are independent |
| 1A, 2A, 3A, 4A | Buffer input | Non-inverting logic input per channel; TTL-compatible thresholds |
| 1Y, 2Y, 3Y, 4Y | Buffer output | True output with 3-state control; capable of sourcing/sinking ±6 mA |
| VCC (Pin 14) | Positive supply | Connects to 4.5–5.5 V rail; requires local 0.1-µF bypass capacitor |
| GND (Pin 7) | Ground reference | Common return path for all channels; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 5 V - eliminates need for level-shifting when interfacing with legacy 5-V TTL logic |
| Balanced 3-state outputs | IOH = IOL = ±6 mA - ensures matched rise/fall times and clean bus release during state transitions |
| Wide temperature range | –55°C to +125°C operation - supports deployment in under-hood automotive ECUs and aerospace avionics |
| Low quiescent current | ICC ≤ 80 µA at 85°C - extends battery life in always-on monitoring circuits |
| SOIC-14 packaging | 8.70 mm × 3.90 mm body - enables high-density routing on space-constrained control boards |
Applications
| Microcontroller Bus Interface | Industrial Sensor Data Multiplexing |
|---|---|
Use Scenario: Isolating and enabling multiple peripheral devices (e.g., ADCs, DACs, EEPROMs) on a shared 8-bit data bus connected to an 8051 or PIC microcontroller. IC Role / Device Role / Timing Role: Acts as a bidirectional bus buffer with independent 3-state control per channel, synchronizing data flow during read/write cycles. Use Value: Prevents bus contention by placing unused peripherals in high-impedance state, reducing signal integrity issues and enabling deterministic timing at up to 20 MHz. | Use Scenario: Aggregating analog sensor outputs (temperature, pressure, humidity) into a centralized PLC I/O module using discrete 4–20 mA transmitters. IC Role / Device Role / Timing Role: Buffers digital enable signals driving analog multiplexer select lines, ensuring clean edge transitions despite long PCB traces. Use Value: Eliminates false switching caused by slow-rising control signals, improving measurement accuracy and reducing calibration drift in harsh EMI environments. |
| Military Communication Backplane | Automotive Powertrain Control Unit |
Use Scenario: Managing address/data lines between a radiation-tolerant FPGA and memory modules in a satellite telemetry subsystem. IC Role / Device Role / Timing Role: Provides fault-isolated bus buffering with guaranteed operation across –55°C to +125°C, supporting MIL-STD-883 Class B screening. Use Value: Maintains signal fidelity under thermal cycling and ionizing radiation exposure, preventing data corruption during orbital maneuvers. | Use Scenario: Enabling/disabling CAN transceiver standby modes and diagnostic LED drivers within an engine control unit operating near exhaust manifolds. IC Role / Device Role / Timing Role: Controls power-gating logic for peripheral ICs using robust 3-state outputs tolerant of automotive load dump transients. Use Value: Reduces parasitic current draw during engine-off periods while surviving ISO 7637-2 pulse 5a (75 V/100 ms) via internal clamp diodes. |
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 |
|---|---|---|---|
| SN74HCT125DR | Quad buffer with active-high OE (vs. active-low OE in CD74HCT126M96); identical electrical specs and SOIC-14 package | Requires inverted enable logic in firmware/hardware; otherwise drop-in for bus isolation where OE polarity is flexible | Select when system design uses positive-logic enable signals and board layout allows minor netlist update |
| MC74VHC126DT | Wider supply range (2–5.5 V) but lower drive (±8 mA vs. ±6 mA); same pinout and active-low OE | Better suited for mixed-voltage domains (e.g., 3.3-V MCU controlling 5-V peripherals); higher speed (tpd ≤11 ns @ 5 V) | Choose for future-proofing multi-rail designs or where faster propagation is critical, accepting tighter layout constraints for noise mitigation |
Compared with SN74HCT125DR and MC74VHC126DT, CD74HCT126M96 offers optimal balance of proven reliability in extended temperature environments, strict TTL input compatibility, and mature supply chain availability-making it preferred for safety-critical industrial and defense deployments where qualification history matters more than marginal speed gains.
Availability
CD74HCT126M96 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive powertrain modules, and military communication backplanes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HCT126M96 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 90 years of innovation in high-reliability components for industrial, automotive, and aerospace markets.
CD74HCT126M96 belongs to TI's HCT logic family-designed specifically to bridge TTL and CMOS technologies-enabling seamless integration of legacy 5-V systems with modern low-power digital architectures.
FAQ
What is the maximum capacitive load supported by CD74HCT126M96 while maintaining specified timing performance?
CD74HCT126M96 maintains its published propagation delay (tpd ≤25 ns) and transition time (tt ≤15 ns) with a load capacitance of up to 50 pF, as tested per JEDEC standards. For loads exceeding 50 pF-such as longer PCB traces or multiple gate inputs-a series resistor (typically 22–47 Ω) should be added at each output to limit peak current and prevent ringing, ensuring signal integrity remains within CD74HCT126M96's electrical limits.
Does CD74HCT126M96 support hot-swap or live-insertion applications?
CD74HCT126M96 includes internal clamp diodes on all inputs and outputs, rated for ±2000-V HBM ESD protection, but it is not explicitly qualified for hot-swap operation. To implement safe live insertion, external current-limiting resistors and TVS diodes must be added to VCC and signal lines, and power sequencing must ensure GND connects before VCC. The device's absolute maximum ratings (e.g., VI < –0.5 V or > VCC + 0.5 V) must never be violated during insertion-so CD74HCT126M96 requires careful system-level protection design.
Can unused inputs on CD74HCT126M96 be left floating?
No, unused inputs on CD74HCT126M96 must be terminated to either VCC or GND to prevent undefined logic states, oscillation, and excessive current draw. TI recommends using 10-kΩ pull-up or pull-down resistors for unused enable (OE) or data (A) pins-especially in high-noise environments-since floating CMOS inputs can drift into the linear region and cause shoot-through current. This requirement is explicitly stated in Section 11.1 of the CD74HCT126M96 datasheet.
What is the thermal resistance (RθJA) of CD74HCT126M96 in its SOIC-14 package?
The junction-to-ambient thermal resistance (RθJA) for CD74HCT126M96 in the SOIC-14 (D) package is 133.6°C/W, as specified in Section 6.4 of the official TI datasheet (SCHS416). This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves significantly with internal copper planes or thermal vias. At maximum ICC (160 µA) and worst-case ambient (125°C), junction temperature remains well below the 150°C absolute maximum, confirming suitability for sealed enclosure applications.
How does CD74HCT126M96 differ from CD74HC126 in terms of input compatibility?
CD74HCT126M96 features TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V), whereas CD74HC126 uses pure CMOS thresholds (VIH = 3.15 V min, VIL = 1.35 V max at VCC = 4.5 V). This makes CD74HCT126M96 interoperable with legacy 5-V TTL outputs without level shifters, while CD74HC126 requires matching CMOS drivers. Both share identical pinout, 3-state functionality, and SOIC-14 packaging-but CD74HCT126M96 is the correct choice for mixed-technology bus interfacing.
CD74HCT126M96 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
CD74HCT126M96 FAQ
1.How can I place an order for CD74HCT126M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT126M96 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 CD74HCT126M96 reliable?
The price and inventory of CD74HCT126M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT126M96 is usually 5 days.
3.What payment methods are accepted for CD74HCT126M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT126M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT126M96?
CD74HCT126M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT126M96 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 CD74HCT126M96?
For technical support, including CD74HCT126M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT126M96 requirements.
6.How does Aetrix verify that CD74HCT126M96 is sourced from the original manufacturer or authorized distributors?
All CD74HCT126M96 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 CD74HCT126M96 meets industry standards.
7.What is the process for return or replacement of CD74HCT126M96?
All CD74HCT126M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT126M96, 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 CD74HCT126M96 part is unused and in its original packaging.
Return procedure for CD74HCT126M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CD74HCT126M96 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
