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Texas Instruments 74AHC1G125DCKTG4
- Part No.:
- 74AHC1G125DCKTG4
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
74AHC1G125DCKTG4.pdf
- Description:
- IC BUF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,027
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Product details
Overview
74AHC1G125DCKTG4 from Texas Instruments is a single 3-state bus buffer gate used for signal isolation and bidirectional bus control in low-power digital systems. It operates from 2 V to 5.5 V, delivers ±8 mA output drive at 5 V, achieves 6 ns max propagation delay at 5 V, and consumes ≤10 µA ICC - enabling use in portable projectors, medical patient monitors, and industrial motor control interfaces.
For engineers reviewing the 74AHC1G125DCKTG4 datasheet, 74AHC1G125DCKTG4 pinout, 74AHC1G125DCKTG4 application, or 74AHC1G125DCKTG4 equivalent, key selection criteria include its SC-70-5 package footprint, 3-state enable timing (tPZH/tPHZ), input voltage tolerance up to 5.5 V, and guaranteed operation across –40°C to +125°C.
Technical Context
The 74AHC1G125DCKTG4 implements a noninverting buffer with active-low 3-state output control: when OE is low, A is passed to Y; when OE is high, Y enters high-impedance state. Its CMOS AHC logic family ensures rail-to-rail output swing and TTL-compatible input thresholds across the full 2–5.5 V supply range.
It supports down-translation - inputs accept up to 5.5 V regardless of VCC - and features balanced rise/fall times (tPLH ≈ tPHL) with load-dependent propagation delays (e.g., 3.8–7 ns at 5 V, CL = 15 pF). Thermal resistance RθJA is 289.2°C/W in the SC-70 package, requiring attention to PCB copper area for thermal management in sustained 8 mA drive scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - enables direct interface with 3.3 V and 5 V logic domains without level shifters |
| Max Propagation Delay | 6 ns at VCC = 5 V, CL = 15 pF - ensures timing compliance in sub-100 MHz digital control paths |
| Output Drive Strength | ±8 mA at VCC = 5 V - sufficient to drive 50 Ω transmission lines or multiple 74AHC inputs (fan-out ≥20) |
| Quiescent Supply Current | ≤10 µA - supports battery-backed or always-on monitoring circuits with negligible standby drain |
| Input Voltage Tolerance | Up to 5.5 V independent of VCC - allows safe interfacing with higher-voltage peripherals in mixed-supply systems |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and medical equipment |
| ESD Rating (HBM) | ±1500 V - meets IEC 61000-4-2 Level 2 for board-level robustness without external protection |
Pinout & Package
74AHC1G125DCKTG4 uses the SC-70-5 (DCK) package: 2.00 mm × 2.10 mm body, 0.6 mm max height, 0.65 mm pitch, and single-row 5-pin configuration. Pin 1 (OE) is marked by a dot or beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-low 3-state enable input | Pulling high disables Y (high-Z); pulling low enables true A→Y pass-through - requires pull-up to VCC during power-up for fail-safe isolation |
| 2 - A | Buffer input | CMOS-compatible input accepting 0–5.5 V; no internal termination - must be driven or tied to valid logic level to prevent floating |
| 3 - GND | Ground reference | Primary return path for all internal logic and output current; must connect to low-impedance system ground plane |
| 4 - Y | 3-state buffered output | Drives high/low when OE = L; presents >10⁸ Ω impedance when OE = H - prevents bus contention in shared-data applications |
| 5 - VCC | Power supply | Supplies core logic and output drivers; requires local 0.1 µF ceramic bypass capacitor placed within 2 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply voltage range | 2 V to 5.5 V operation eliminates need for separate 3.3 V/5 V rails in mixed-voltage designs |
| Input overvoltage tolerance | 5.5 V absolute max input rating enables safe connection to legacy 5 V buses while powered from 3.3 V |
| Low dynamic power | 14 pF typical power dissipation capacitance minimizes switching current in high-frequency clock distribution |
| Controlled edge rates | Δt/Δv = 20 ns/V at 5 V reduces EMI and overshoot on unterminated traces up to 10 cm |
| High-impedance fail-safe | OE-high forces Y into >10⁸ Ω state - prevents back-driving during power sequencing or hot-swap events |
Applications
| Projector Video Interface | Patient Monitoring Data Bus |
|---|---|
Use Scenario: Isolating HDMI or LVDS video data lanes between FPGA video processor and display driver ICs. IC Role / Device Role / Timing Role: 3-state buffer controlling write-enable signals and pixel clock gating to prevent bus contention during mode switching. Use Value: 6 ns propagation delay ensures setup/hold timing margins are maintained at 74.25 MHz TMDS clock rates. | Use Scenario: Multiplexing analog sensor readings (ECG, SpO₂) onto a shared SPI or I²C diagnostic bus in portable medical devices. IC Role / Device Role / Timing Role: Enabling/disabling sensor ADC outputs via OE to avoid signal collisions during concurrent read cycles. Use Value: ±8 mA drive supports 10 cm trace lengths to remote sensors without signal degradation or added termination. |
| Industrial AC Motor Control | Electronic Point-of-Sale Terminal |
Use Scenario: Buffering PWM enable signals from microcontroller to isolated gate drivers in variable-frequency drives. IC Role / Device Role / Timing Role: Single-channel buffer with OE synchronized to safety shutdown logic to force gate driver disable during fault conditions. Use Value: –40°C to +125°C rating ensures reliable operation near heatsinks and power modules in enclosed enclosures. | Use Scenario: Managing communication handshaking between payment module, receipt printer, and touchscreen controller in retail kiosks. IC Role / Device Role / Timing Role: Bidirectional bus isolator preventing ground loop noise from printer motor transients from corrupting touchscreen I²C traffic. Use Value: 10 µA max ICC extends battery life in backup-powered POS terminals during extended idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHC1G125DCKR | Same SC-70-5 package, identical electrical specs, active production status vs. obsolete DCKTG4 | Identical functional replacement; differs only in tape-and-reel packaging (3000 vs. discontinued 250-unit reel) | Select DCKR for new designs requiring volume availability and TI's current standard packaging |
| 74LVC1G125GW,125 | Lower VCC range (1.65–5.5 V), 3.7 ns max tPD at 3.3 V, ±24 mA drive - higher performance but less 5 V tolerant | Better suited for 3.3 V–only systems needing faster edges; not recommended where 5 V inputs are present | Choose only if design is strictly 3.3 V and requires <4 ns delay; verify input overvoltage capability is unnecessary |
Compared with 74AHC1G125DCKTG4, SN74AHC1G125DCKR offers identical functionality with assured long-term supply, while 74LVC1G125GW,125 trades 5 V input tolerance for speed and drive strength - making DCKR the preferred drop-in alternative for continuity, and LVC1G125 suitable only in 3.3 V-native systems.
Availability
74AHC1G125DCKTG4 is available at Aetrix Electronics and suitable for projector video interfaces, patient monitoring data buses, and industrial AC motor control systems requiring stable component supply and verified thermal performance in compact SC-70 packages.
Supply support for 74AHC1G125DCKTG4 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 company specializing in analog and embedded processing technologies, with leadership in precision analog, power management, and logic solutions.
The SN74AHC1G125 belongs to TI's advanced high-speed CMOS (AHC) logic family, designed for low-power, wide-voltage digital interfacing in space-constrained industrial, medical, and consumer applications.
FAQ
What is the function of the OE pin on the 74AHC1G125DCKTG4?
The OE (Output Enable) pin on the 74AHC1G125DCKTG4 is an active-low control input that determines whether the output Y is enabled or placed in high-impedance state. When OE is low, the device passes the A input signal to Y; when OE is high, Y disconnects electrically from the bus. For safe power-up behavior, OE should be pulled high via a resistor to VCC.
Does the 74AHC1G125DCKTG4 support 5 V input signals when powered from 3.3 V?
Yes, the 74AHC1G125DCKTG4 supports input voltages up to 5.5 V regardless of VCC level - a feature called input overvoltage tolerance. This allows it to safely interface with 5 V logic while operating from a 3.3 V supply, eliminating external level shifters in mixed-voltage systems.
What is the maximum output current rating for the 74AHC1G125DCKTG4?
The 74AHC1G125DCKTG4 is rated for ±8 mA output current per pin at VCC = 5 V, with absolute maximum continuous output current of ±25 mA. Total device current (summed across VCC and GND pins) must not exceed ±50 mA to maintain reliability and thermal stability in the SC-70 package.
Is the 74AHC1G125DCKTG4 suitable for automotive applications?
The 74AHC1G125DCKTG4 itself is not automotive-qualified; however, its pin-compatible and functionally identical variant SN74AHC1G125-Q1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C) for automotive use. For production automotive systems, SN74AHC1G125-Q1 must be selected instead of 74AHC1G125DCKTG4.
What package type does the 74AHC1G125DCKTG4 use, and what are its key mechanical dimensions?
The 74AHC1G125DCKTG4 uses the SC-70-5 (DCK) package: 2.00 mm × 2.10 mm body size, 0.65 mm lead pitch, 0.6 mm maximum height, and single-row 5-pin configuration. Pin 1 is identified by a beveled corner or dot marking, and the package is RoHS-compliant with NiPdAu lead finish.
74AHC1G125DCKTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
74AHC1G125DCKTG4 FAQ
1.How can I place an order for 74AHC1G125DCKTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC1G125DCKTG4 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 74AHC1G125DCKTG4 reliable?
The price and inventory of 74AHC1G125DCKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC1G125DCKTG4 is usually 5 days.
3.What payment methods are accepted for 74AHC1G125DCKTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC1G125DCKTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHC1G125DCKTG4?
74AHC1G125DCKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC1G125DCKTG4 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 74AHC1G125DCKTG4?
For technical support, including 74AHC1G125DCKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC1G125DCKTG4 requirements.
6.How does Aetrix verify that 74AHC1G125DCKTG4 is sourced from the original manufacturer or authorized distributors?
All 74AHC1G125DCKTG4 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 74AHC1G125DCKTG4 meets industry standards.
7.What is the process for return or replacement of 74AHC1G125DCKTG4?
All 74AHC1G125DCKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC1G125DCKTG4, 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 74AHC1G125DCKTG4 part is unused and in its original packaging.
Return procedure for 74AHC1G125DCKTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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