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Texas Instruments SN74AHC1G125DCKR
- Part No.:
- SN74AHC1G125DCKR
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
SN74AHC1G125DCKR.pdf
- Description:
- IC BUF NON-INVERT 5.5V SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:43,446
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Product details
Overview
SN74AHC1G125 from Texas Instruments is a single-channel 3-state bus buffer gate designed for level-shifting and bidirectional bus isolation 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 SN74AHC1G125 datasheet, SN74AHC1G125 pinout, SN74AHC1G125 application, or SN74AHC1G125 equivalent, key selection criteria include its 5-pin SC-70 (DCK) package, 3-state enable-controlled output behavior, wide supply range compatibility, and verified performance across –40°C to +125°C ambient conditions.
Technical Context
The SN74AHC1G125 implements a noninverting CMOS buffer with active-low 3-state output enable (OE). When OE is low, A is passed to Y with true logic polarity; when OE is high, Y enters high-impedance state - supporting shared-bus architectures without contention. Its input tolerance up to 5.5 V enables down-translation from higher-voltage logic domains into 3.3 V or 2.5 V systems.
Designed for low-noise operation, it features controlled edge rates (20 ns/V min at 5 V), low output drive (±8 mA), and minimal dynamic power (14 pF Cpd at 1 MHz). These characteristics reduce signal overshoot/undershoot and EMI in space-constrained applications such as point-of-sale terminals and embedded display controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 5.5 V - supports interoperability across 2.5 V, 3.3 V, and 5 V logic families without level shifters |
| Max Propagation Delay | 6 ns at VCC = 5 V, CL = 15 pF - ensures timing compliance in sub-100 MHz data paths |
| Output Drive Strength | ±8 mA at VCC = 5 V - sufficient to drive moderate capacitive loads (≤50 pF) while limiting ringing |
| Quiescent Supply Current | ≤10 µA - enables battery-backed or always-on subsystems with negligible standby drain |
| Input Voltage Tolerance | Up to 5.5 V regardless of VCC - allows safe interfacing with 5 V inputs even when powered from 3.3 V |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive-adjacent environments including motor controls |
| ESD Rating (HBM) | ±1500 V - meets standard handling requirements for automated assembly and field service |
Pinout & Package
SN74AHC1G125DCKR uses the SC-70 (DCK) 5-pin surface-mount package (2.00 mm × 2.1 mm body size), optimized for high-density PCB layouts in portable and space-constrained electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OE | Active-low output enable input | Drives Y to high-impedance when high; ties to VCC via pull-up for power-up safety |
| 2 - A | Buffer input | Accepts logic signals up to 5.5 V; compatible with mixed-voltage system interconnects |
| 3 - GND | Ground reference | Must be low-inductance connection to minimize switching noise coupling into logic paths |
| 4 - Y | 3-state noninverting output | Provides true A signal when OE is low; floats electrically when OE is high |
| 5 - VCC | Positive supply | Requires local 0.1 µF ceramic bypass capacitor placed adjacent to pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply voltage range | 2 V to 5.5 V operation enables direct integration into multi-rail systems without external regulators |
| Down-voltage translation capability | 5.5 V-tolerant inputs allow interfacing with legacy 5 V logic while powered from 3.3 V or lower supplies |
| Low dynamic power consumption | 14 pF typical power dissipation capacitance minimizes switching current and heat generation |
| Controlled output edge rates | 20 ns/V minimum input transition rate at 5 V reduces EMI and signal integrity issues on stubbed traces |
| High-impedance state robustness | IOZ ≤ ±2.5 µA at 5.5 V ensures reliable bus release and prevents leakage-induced logic errors |
Applications
| Projector Interface Logic | Patient Monitoring Signal Routing |
|---|---|
Use Scenario: Isolating HDMI or LVDS video data lanes between FPGA-based scaler and display driver ICs. IC Role / Device Role / Timing Role: 3-state buffer managing bi-directional pixel clock and data enable handshaking under software control. Use Value: Prevents bus contention during mode switching; 6 ns delay preserves timing margins in 720p/1080p video pipelines. | Use Scenario: Multiplexing analog sensor outputs (ECG, SpO₂) onto shared ADC input channels in compact bedside units. IC Role / Device Role / Timing Role: Enabling/disabling sensor channel buffers via microcontroller GPIO to avoid cross-talk during sampling. Use Value: ±8 mA drive safely handles 10 kΩ sensor source impedances; 10 µA ICC extends battery life in portable configurations. |
| Industrial Motor Control I/O | Retail Point-of-Sale Terminal |
Use Scenario: Level-shifting PLC output signals to isolated gate drivers or position encoder interfaces operating at different supply rails. IC Role / Device Role / Timing Role: Translating 24 V digital I/O down to 3.3 V logic levels using resistor-divider + SN74AHC1G125 input protection. Use Value: 5.5 V-tolerant inputs eliminate need for external clamping diodes; –40°C to +125°C rating matches motor enclosure thermal profiles. | Use Scenario: Managing shared data lines between receipt printer, barcode scanner, and cash drawer in compact countertop POS hardware. IC Role / Device Role / Timing Role: Bus arbitration element allowing one peripheral to drive the line while others remain tri-stated. Use Value: Low 6 ns propagation delay maintains real-time response; SC-70 footprint saves board area in cost-sensitive consumer-grade enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G125DCKR | Lower VCC range (1.65–5.5 V); higher drive (±32 mA at 3.3 V); faster tPD (3.5 ns typ) | Better suited for high-speed 3.3 V-only systems; less tolerant of 2 V operation | Select when speed and 3.3 V drive strength outweigh wider supply flexibility |
| MC74VHC1GT125DTT1G | Same 2–5.5 V range; slightly higher ICC (max 20 µA); identical pinout and function | Qualified for extended temperature (–55°C to +125°C); preferred in harsh-environment industrial designs | Choose for aerospace, defense, or extended-temp industrial deployments requiring broader qualification |
Compared with SN74LVC1G125DCKR and MC74VHC1GT125DTT1G, SN74AHC1G125DCKR offers optimal balance of ultra-low quiescent current (≤10 µA), robust 2 V minimum operation, and proven reliability in commercial medical and consumer displays - making it ideal where standby power and voltage flexibility are prioritized over peak speed or extreme temperature range.
Availability
SN74AHC1G125DCKR is available at Aetrix Electronics and suitable for projector interface logic, patient monitoring signal routing, and industrial motor control I/O requiring stable component supply across long production lifecycles.
Supply support for SN74AHC1G125DCKR 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 for industrial, automotive, and communications markets.
The SN74AHC1G125 belongs to TI's AHC logic family - engineered for low-power, wide-supply-voltage bus interfacing in space-constrained, thermally demanding applications such as medical instrumentation and consumer electronics.
FAQ
What is the maximum operating temperature for SN74AHC1G125DCKR?
The SN74AHC1G125DCKR is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per JEDEC JESD78 and applies to the SC-70 (DCK) package variant. Thermal derating is not required within this range when mounted per recommended PCB layout guidelines and with proper copper pour for heat dissipation. The device remains fully functional at full electrical specifications across this entire interval.
Does SN74AHC1G125DCKR support 5 V logic inputs when powered from 3.3 V?
Yes, SN74AHC1G125DCKR supports input voltages up to 5.5 V independent of VCC, enabling true down-translation. When powered from 3.3 V, it reliably accepts 5 V TTL or CMOS signals on pin 2 (A) and pin 1 (OE), with VIH thresholds defined at 2.1 V (min) and VIL at 0.9 V (max) - ensuring noise-immune recognition of 5 V logic levels without external level shifters.
What is the recommended bypass capacitor for SN74AHC1G125DCKR?
A 0.1 µF X7R ceramic capacitor placed as close as possible to pin 5 (VCC) and pin 3 (GND) is the recommended bypass solution for SN74AHC1G125DCKR. TI specifies this value in Section 8.3 of the datasheet to suppress high-frequency supply noise generated during output transitions. For systems with multiple logic devices sharing the same rail, paralleling a 1 µF capacitor nearby improves low-frequency decoupling without compromising high-frequency response.
How does the 3-state enable (OE) function behave during power-up?
During power-up, SN74AHC1G125DCKR output Y enters a high-impedance state only if OE is held high. To guarantee safe startup, TI recommends tying OE to VCC through a pull-up resistor (value determined by driver sink capability). Without this, floating OE may cause undefined output states. The device does not incorporate internal power-on reset; external biasing is required for deterministic 3-state behavior at VCC ramp.
Is SN74AHC1G125DCKR pin-compatible with other 5-pin SC-70 logic buffers?
SN74AHC1G125DCKR follows the standard SC-70-5 pinout (OE-A-GND-Y-VCC), matching industry-standard 5-pin logic buffers including SN74LVC1G125DCKR and MC74VHC1GT125DTT1G. Mechanical and electrical pin compatibility is confirmed by TI's packaging documentation and JEDEC MO-203-AB. However, functional equivalence requires verification of timing, drive strength, and supply range alignment per application requirements.
SN74AHC1G125DCKR 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:
- Active
- 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
SN74AHC1G125DCKR FAQ
1.How can I place an order for SN74AHC1G125DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC1G125DCKR 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 SN74AHC1G125DCKR reliable?
The price and inventory of SN74AHC1G125DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC1G125DCKR is usually 5 days.
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SN74AHC1G125DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC1G125DCKR 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 SN74AHC1G125DCKR?
For technical support, including SN74AHC1G125DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC1G125DCKR requirements.
6.How does Aetrix verify that SN74AHC1G125DCKR is sourced from the original manufacturer or authorized distributors?
All SN74AHC1G125DCKR 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 SN74AHC1G125DCKR meets industry standards.
7.What is the process for return or replacement of SN74AHC1G125DCKR?
All SN74AHC1G125DCKR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC1G125DCKR, 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 SN74AHC1G125DCKR part is unused and in its original packaging.
Return procedure for SN74AHC1G125DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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