My Inquiry
My Account
Nexperia USA Inc. 74HCT126D,653
- Part No.:
- 74HCT126D,653
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT126D,653.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,883
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74HCT126D,653 from Nexperia is a quad 3-state buffer/line driver with TTL-compatible inputs, SO14 (SOT108-1) package, 4.5 V to 5.5 V supply range, -40 °C to +125 °C operating temperature, and propagation delay of 14 ns (typ) at VCC = 4.5 V and CL = 50 pF - used for bidirectional bus interfacing in industrial control logic.
For engineers reviewing the 74HCT126D,653 datasheet, 74HCT126D,653 pinout, 74HCT126D,653 application, or 74HCT126D,653 equivalent, key selection criteria include TTL-level input compatibility, 3-state output enable timing (ten = 13 ns typ), output drive capability (±6 mA), thermal derating above 100 °C, and SO14 package footprint compatibility with legacy 74-series designs.
Technical Context
This device implements four independent non-inverting buffers, each with an active-HIGH output enable (nOE) controlling high-impedance OFF-state. Input clamp diodes allow safe interface to voltages exceeding VCC when current-limiting resistors are used.
It operates within JEDEC-compliant TTL input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) and delivers VOH ≥ 3.98 V and VOL ≤ 0.26 V under ±6 mA load - ensuring robust noise margins in mixed-voltage digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - matches standard 5 V TTL systems without level-shifting. |
| Propagation Delay | 14 ns (typ) at VCC = 4.5 V, CL = 50 pF - enables reliable operation up to ~35 MHz bus toggle rates. |
| Output Drive | ±6.0 mA - sufficient to drive standard 50 pF loads and multiple CMOS/TTL inputs. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - ensures direct compatibility with 5 V TTL logic families. |
| Operating Temp | -40 °C to +125 °C - qualified for extended industrial and under-hood embedded applications. |
| Power Dissipation | CPD = 24 pF - determines dynamic power as PD = CPD × VCC² × fi × N, critical for thermal budgeting. |
| Enable/Disable Time | ten = 13 ns, tdis = 18 ns (typ) - defines minimum bus turnaround latency in shared-data-path systems. |
Pinout & Package
74HCT126D,653 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, and standard JEDEC MS-012 outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (1OE–4OE) | Active-HIGH output enable per buffer - drives corresponding Y output to high-Z when LOW. |
| 2, 5, 9, 12 | nA (1A–4A) | Non-inverting data input - passes through to Y when OE is HIGH. |
| 3, 6, 8, 11 | nY (1Y–4Y) | 3-state buffered output - reflects nA when OE HIGH; high-impedance when OE LOW. |
| 7 | GND | Ground reference (0 V) - return path for all internal logic and I/O currents. |
| 14 | VCC | Positive supply rail - powers internal CMOS circuitry and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Accepts standard 5 V TTL voltage levels without external biasing or level shifters. |
| Clamp diode protection | Enables safe interface to signals > VCC using series current-limiting resistors. |
| High noise immunity | Guaranteed 400 mV noise margin at VCC = 4.5 V due to tight VIH/VIL specs and CMOS design. |
| Latch-up immunity | Exceeds 100 mA per JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage. |
| ESD robustness | HBM > 2000 V, CDM > 1000 V - reduces handling sensitivity and improves board-level reliability. |
Applications
| Industrial PLC Backplane Bus | Legacy Microcontroller Address Latching |
|---|---|
|
Use Scenario: Isolating and driving multiplexed address/data buses between CPU and peripheral modules in programmable logic controllers. IC Role / Device Role / Timing Role: Quad 3-state buffer enabling time-multiplexed bidirectional bus sharing with precise enable/disable timing control. Use Value: Prevents bus contention during state transitions; 13 ns enable time supports sub-40 MHz bus arbitration cycles. |
Use Scenario: Latching 8-bit address outputs from 8051-family microcontrollers before accessing external memory or peripherals. IC Role / Device Role / Timing Role: Non-inverting line driver with 3-state outputs synchronized to ALE signal for clean address capture. Use Value: Eliminates address skew across parallel lines; ±6 mA drive sustains signal integrity over 10 cm PCB traces. |
| Test Equipment Signal Routing | Automated Test Fixture I/O Expansion |
|
Use Scenario: Routing and buffering digital stimulus signals from FPGA-based pattern generators to DUT pins in ATE systems. IC Role / Device Role / Timing Role: Signal conditioning buffer with fast disable (18 ns) to isolate test channels during reconfiguration. Use Value: Enables glitch-free channel switching; SO14 footprint allows dense placement on compact probe cards. |
Use Scenario: Expanding GPIO count on boundary-scan test adapters by adding isolated, controllable I/O banks. IC Role / Device Role / Timing Role: Logic-level translator and driver for interfacing 3.3 V controller outputs to 5 V test fixtures. Use Value: TTL input compatibility accepts 3.3 V logic highs directly; clamp diodes protect against fixture-induced transients. |
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 |
|---|---|---|---|
| 74HCT125D,653 | Inverting output polarity (A → Y̅); identical pinout, timing, and electrical specs. | Required where bus inversion is needed for signal conditioning or protocol alignment. | Select only if functional inversion is explicitly required - otherwise 74HCT126D provides direct signal pass-through. |
| SN74HCT126DR | Same logic function and specs, but TI's SO-14 package has tighter thermal resistance (θJA = 110 K/W vs Nexperia's 120 K/W). | Better suited for sustained high-frequency operation in thermally constrained enclosures. | Prefer for continuous 20+ MHz operation near thermal limits; otherwise Nexperia offers superior long-term availability and automotive-grade traceability. |
Compared with 74HCT126D,653, the 74HCT125D,653 provides inverted outputs without changing layout, while SN74HCT126DR offers marginally better thermal performance but less consistent industrial lifecycle support - making the original Nexperia part optimal for cost-sensitive, volume industrial designs requiring long-term supply stability.
Availability
74HCT126D,653 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automated test equipment signal routing, and legacy microcontroller address latching requiring stable component supply across extended temperature ranges.
Supply support for 74HCT126D,653 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and discrete components for industrial, automotive, and consumer markets.
The 74HCT126 belongs to Nexperia's 74HCT logic family - engineered for TTL-input compatibility and robust operation in harsh industrial environments with extended temperature and ESD requirements.
FAQ
Can 74HCT126D,653 operate at 3.3 V supply?
No. The 74HCT126D,653 is specified only for 4.5 V to 5.5 V operation per its recommended conditions. At 3.3 V, input thresholds (VIH = 2.0 V min) become marginal, and output drive (VOH ≥ 3.98 V) cannot be guaranteed - use 74LVC126 for 3.3 V systems.
What is the maximum capacitive load this device can drive reliably?
It is characterized up to 50 pF (CL = 50 pF) with guaranteed timing. Driving >50 pF increases propagation delay nonlinearly and may cause overshoot; for >70 pF loads, add series termination or use a dedicated bus driver like 74LVT126.
Does this part support hot-swap or live-insertion?
No. It lacks powered-off protection or Ioff specification. Applying signals to inputs or outputs while VCC = 0 V risks forward-biasing internal clamp diodes and causing excessive current - always power VCC before applying logic signals.
How does the SO14 (SOT108-1) package compare thermally to TSSOP14?
SOT108-1 has θJA ≈ 120 K/W, while SOT402-1 (TSSOP14) is ≈ 145 K/W - meaning the SO14 dissipates heat more effectively. For continuous 5 V/10 MHz operation, SO14 keeps junction temperature ~15 °C lower than TSSOP14 under identical PCB conditions.
74HCT126D,653 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- 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:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74HCT126D,653 FAQ
1.How can I place an order for 74HCT126D,653 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT126D,653 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 74HCT126D,653 reliable?
The price and inventory of 74HCT126D,653 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT126D,653 is usually 5 days.
3.What payment methods are accepted for 74HCT126D,653?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT126D,653 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT126D,653?
74HCT126D,653 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT126D,653 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 74HCT126D,653?
For technical support, including 74HCT126D,653 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT126D,653 requirements.
6.How does Aetrix verify that 74HCT126D,653 is sourced from the original manufacturer or authorized distributors?
All 74HCT126D,653 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 74HCT126D,653 meets industry standards.
7.What is the process for return or replacement of 74HCT126D,653?
All 74HCT126D,653 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT126D,653, 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 74HCT126D,653 part is unused and in its original packaging.
Return procedure for 74HCT126D,653:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT126D,653 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…
