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NXP Semiconductors 74HCT2G125GD,125
- Part No.:
- 74HCT2G125GD,125
- Manufacturer:
- NXP Semiconductors
- Package:
- 8-XFDFN
- Datasheet:
-
74HCT2G125GD,125.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 8XSON
- Quantity:
- Payment:
- Shipping:
Inventory:54,000
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Product details
Overview
74HCT2G125GD,125 from Nexperia is a dual 3-state buffer/line driver with TTL-compatible inputs, operating from 4.5 V to 5.5 V, featuring 15 ns typical propagation delay at VCC = 4.5 V and CL = 50 pF, ±6 mA output drive, and -40 °C to +125 °C temperature range - used for bidirectional bus interfacing in industrial control logic.
For engineers reviewing the 74HCT2G125GD,125 datasheet, 74HCT2G125GD,125 pinout, 74HCT2G125GD,125 application, or 74HCT2G125GD,125 equivalent, this page delivers verified pin functions, real-world timing behavior under load, input threshold compatibility with legacy TTL systems, and validated drop-in alternatives for bus isolation and signal routing design.
Technical Context
This device implements two independent non-inverting buffers, each with active-low 3-state enable (1OE, 2OE), enabling bidirectional data flow control on shared buses. Each channel supports CMOS-level output swing and TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V).
Propagation delay (tpd) is 15 ns typical (31 ns max) from input to output and 15 ns typical (35 ns max) from enable to output at VCC = 4.5 V and CL = 50 pF. Input clamping diodes allow safe interface to voltages exceeding VCC when current-limiting resistors are used.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL logic rails and stable operation across industrial voltage tolerances. |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - guarantees reliable recognition of legacy TTL logic levels without level-shifting circuitry. |
| Output Drive | ±6.0 mA at VCC = 4.5 V - sufficient to drive 50 pF loads with <31 ns propagation delay, supporting moderate-speed bus loading. |
| Propagation Delay | 15 ns typical (31 ns max) at VCC = 4.5 V, CL = 50 pF - enables reliable operation up to ~20 MHz clocked bus applications. |
| Operating Temperature | -40 °C to +125 °C - qualified for extended industrial environments including motor drives and power supply controllers. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - reduces risk of handling damage during PCB assembly and field service. |
| Power Dissipation | ICC ≤ 20 μA at VCC = 5.5 V, no switching - supports low-quiescent-power system states in standby mode. |
Pinout & Package
XSON8 (SOT996-2) plastic extremely thin small outline package; 8 leads; body size 1.35 × 1.35 mm; 0.35 mm pitch; exposed thermal pad; leadless surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OE | Active-low enable for Buffer 1 - pulls 1Y high-impedance when LOW, allows pass-through when HIGH. |
| 2 | 1A | Data input for Buffer 1 - accepts TTL-level signals; clamped to GND/VCC for overvoltage tolerance. |
| 3 | GND | Ground reference - must be low-inductance connection to minimize switching noise coupling. |
| 4 | 2A | Data input for Buffer 2 - electrically isolated from 1A; shares same VIH/VIL specs and clamping. |
| 5 | 2Y | Data output for Buffer 2 - drives bus or downstream logic; high-impedance when 2OE = LOW. |
| 6 | VCC | Positive supply - decoupling capacitor (100 nF) required within 3 mm of pin for stable switching. |
| 7 | 2OE | Active-low enable for Buffer 2 - independent control enables selective bus segment activation. |
| 8 | 1Y | Data output for Buffer 1 - non-inverting output; matches 1A state when 1OE = HIGH. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V at 4.5–5.5 V - eliminates need for external level shifters when interfacing with 5 V microcontrollers or legacy peripherals. |
| Independent 3-state control | Dual active-low OE pins (1OE, 2OE) - enables simultaneous or staggered bus release for glitch-free arbitration in multi-master systems. |
| Input clamping diodes | Integrated GND/VCC clamp structure - permits safe interface to signals up to VCC + 0.5 V using series current-limiting resistors. |
| Low dynamic power | CPD = 11 pF (output enabled), 1 pF (output disabled) - reduces switching current and EMI in high-frequency bus toggling scenarios. |
| High noise immunity | Typical noise margin > 0.9 V at VCC = 4.5 V - suppresses false triggering from coupled transients in noisy industrial enclosures. |
Applications
| Industrial PLC I/O Expansion | Microcontroller Bus Isolation |
|---|---|
|
Use Scenario: Isolating GPIO banks between a main controller and modular I/O cards in a programmable logic controller rack. IC Role / Device Role / Timing Role: Dual buffer provides direction-controlled signal routing; 3-state outputs prevent contention during hot-swap insertion or firmware reconfiguration. Use Value: Enables deterministic bus release via independent OE control, eliminating bus lock-up during card replacement without requiring system reset. |
Use Scenario: Interfacing an ARM Cortex-M4's parallel memory bus to external SRAM while sharing address/data lines with a display controller. IC Role / Device Role / Timing Role: Acts as bi-directional bus driver with OE synchronized to memory access strobes; supports 20 MHz burst reads via 15 ns tpd. Use Value: Allows time-multiplexed use of shared traces without signal integrity degradation, reducing PCB layer count and routing complexity. |
| Automated Test Equipment (ATE) Signal Routing | Legacy Instrumentation Interface |
|
Use Scenario: Routing digital stimulus signals from multiple DUT channels to a common measurement unit in benchtop ATE systems. IC Role / Device Role / Timing Role: Provides channel-selectable signal gating; 3-state outputs isolate unused paths to prevent capacitive loading and crosstalk. Use Value: Maintains signal fidelity (<15 ns skew between channels) and prevents inter-channel leakage, critical for sub-100 ns timing accuracy. |
Use Scenario: Adapting RS-232 control lines (TTL-level) to modern FPGA-based instrumentation controllers with 5 V tolerant I/O. IC Role / Device Role / Timing Role: Level-translating buffer with TTL input thresholds and CMOS output swing - bridges legacy serial peripheral logic to new host platforms. Use Value: Eliminates discrete resistor-divider networks and improves noise margin by 40% versus passive translation, extending operational life in lab environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2G125DPWR | Wider VCC range (1.65–5.5 V); CMOS inputs (VIH = 0.7×VCC); lower ICC (10 μA max) | Better suited for mixed-voltage systems (e.g., 3.3 V MCU + 5 V peripherals); less tolerant of legacy TTL inputs | Select when migrating to 3.3 V domains or requiring ultra-low static power; avoid if interfacing pure 5 V TTL sources. |
| 74AHC2G125GW,125 | Faster tpd (10 ns typ at 5 V); higher drive (±8 mA); wider VCC (2–5.5 V); CMOS inputs | Enables >25 MHz bus operation but lacks TTL input compatibility - requires level-shifting for legacy 5 V logic | Choose for speed-critical designs where input compatibility is handled externally; not drop-in for TTL source interfaces. |
Compared with SN74LVC2G125DPWR and 74AHC2G125GW,125, the 74HCT2G125GD,125 uniquely balances TTL input compatibility, industrial temperature range, and XSON8 space efficiency - making it optimal for retrofitting legacy 5 V systems without redesigning signal conditioning.
Availability
74HCT2G125GD,125 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller bus isolation, automated test equipment signal routing, and legacy instrumentation interface requiring stable component supply across extended temperature ranges.
Supply support for 74HCT2G125GD,125 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 delivering high-performance logic, analog, and MOSFET solutions optimized for reliability and efficiency in industrial, automotive, and consumer applications.
The 74HCT series targets robust 5 V logic interoperability, emphasizing TTL input compatibility, wide temperature operation, and low-power CMOS architecture for industrial control and legacy system integration.
FAQ
What is the maximum recommended operating frequency for 74HCT2G125GD,125 in a 50 pF loaded bus?
The device achieves 15 ns typical propagation delay at VCC = 4.5 V and CL = 50 pF, supporting reliable operation up to approximately 20 MHz for single-edge-triggered bus protocols. For sustained 50% duty-cycle square waves, derate to ≤15 MHz to maintain timing margins across temperature and voltage extremes.
Can 74HCT2G125GD,125 safely interface with 3.3 V microcontroller GPIOs?
No - its TTL input thresholds (VIH ≥ 2.0 V) are not guaranteed compatible with 3.3 V logic high levels (typically 2.4–2.6 V), risking marginal or failed recognition. Use SN74LVC2G125DPWR instead, which specifies VIH = 0.7×VCC and supports 3.3 V operation down to 1.65 V supply.
Does the XSON8 package (SOT996-2) require special PCB layout considerations?
Yes - the 0.35 mm pitch and exposed thermal pad demand controlled-depth solder paste deposition, stencil aperture reduction (80–90%), and thermal relief on GND/VCC pads. IPC-7351B footprint compliance is mandatory; reflow profile must include 150–180 s above 217 °C for void-free solder joints.
Is 74HCT2G125GD,125 qualified for automotive applications?
No - this part is not AEC-Q100 qualified and lacks automotive-grade screening, temperature validation beyond +125 °C, or failure-in-time (FIT) data. Nexperia explicitly states non-automotive qualification in its legal disclaimers; use 74HCT2G125DP/AU for under-hood or safety-critical vehicle systems.
74HCT2G125GD,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74HCT
- Package/Case:
- 8-XFDFN
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- 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:
- 8-XSON (2x3)
74HCT2G125GD,125 FAQ
1.How can I place an order for 74HCT2G125GD,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT2G125GD,125 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 74HCT2G125GD,125 reliable?
The price and inventory of 74HCT2G125GD,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT2G125GD,125 is usually 5 days.
3.What payment methods are accepted for 74HCT2G125GD,125?
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4.How is shipping managed for 74HCT2G125GD,125?
74HCT2G125GD,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT2G125GD,125 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 74HCT2G125GD,125?
For technical support, including 74HCT2G125GD,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT2G125GD,125 requirements.
6.How does Aetrix verify that 74HCT2G125GD,125 is sourced from the original manufacturer or authorized distributors?
All 74HCT2G125GD,125 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 74HCT2G125GD,125 meets industry standards.
7.What is the process for return or replacement of 74HCT2G125GD,125?
All 74HCT2G125GD,125 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT2G125GD,125, 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 74HCT2G125GD,125 part is unused and in its original packaging.
Return procedure for 74HCT2G125GD,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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