My Inquiry
My Account
Texas Instruments SN74HCS125QPWRQ1
- Part No.:
- SN74HCS125QPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HCS125QPWRQ1.pdf
- Description:
- IC BUFFER NON-INVERT 6V 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,107
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74HCS125QPWRQ1 from Texas Instruments is an automotive-grade quadruple buffer IC with 3-state outputs and Schmitt-trigger inputs, performing Y = A logic per channel. It operates from 2V to 6V supply, delivers ±7.8mA output drive at 6V, supports –40°C to +125°C ambient temperature, and features typical ICC of 100nA - enabling robust signal conditioning in noisy vehicle subsystems such as body control modules and sensor interfaces.
For engineers reviewing the SN74HCS125QPWRQ1 datasheet, SN74HCS125QPWRQ1 pinout, SN74HCS125QPWRQ1 application, or SN74HCS125QPWRQ1 equivalent, key selection criteria include Schmitt-trigger noise immunity, 3-state bus isolation capability, automotive AEC-Q100 qualification, low quiescent current for always-on domains, and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
This device integrates four independent CMOS buffers, each with active-low 3-state enable (OE) and hysteresis-equipped Schmitt-trigger inputs. The input hysteresis (ΔVT = 0.55–1.49 V, depending on VCC) enables reliable operation with slow-rising signals or EMI-prone environments common in automotive wiring harnesses.
Each channel implements positive-logic buffering (Y = A), with push-pull outputs capable of symmetric sourcing/sinking up to ±7.8mA at 6V. Output leakage in 3-state mode is ≤2µA, and input leakage remains ≤±100nA across full temperature range - critical for low-power wake-up circuits and battery-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 6V - supports direct connection to 3.3V and 5V automotive sub-system rails without level-shifting |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and cabin electronics |
| Output Drive Strength | ±7.8mA at 6V - sufficient to directly drive LEDs, small relays, or multiple CMOS inputs without external buffers |
| Input Hysteresis (ΔVT) | Min 0.55V at 2V VCC; max 1.49V at 6V VCC - rejects noise spikes and stabilizes marginal transitions from mechanical switches or long traces |
| Quiescent Supply Current | Typical 100nA at 6V - enables use in always-on domains (e.g., door module wake detection) without measurable battery drain |
| Propagation Delay | 5ns max at 6V VCC - ensures timing integrity in 20+ MHz digital control loops (e.g., LIN transceiver interface conditioning) |
| ESD Rating | HBM ±4000V, CDM ±1000V - meets automotive system-level ESD robustness requirements per ISO 10605 |
Pinout & Package
TSSOP-14 (PW) package: 5.00mm × 4.40mm footprint with exposed thermal pad (not present in PW variant); lead-free, RoHS-compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A | Input | Four independent data inputs; each accepts Schmitt-triggered signals for noise-immune signal acquisition |
| 1OE, 2OE, 3OE, 4OE | Input (Active Low) | Per-channel 3-state enable; logic HIGH forces corresponding output into high-impedance state for bus sharing |
| 1Y, 2Y, 3Y, 4Y | Output | Buffered outputs with CMOS push-pull drive; support bidirectional bus isolation when paired with OE control |
| VCC | Power Supply | Positive supply rail (2–6V); requires local 0.1µF bypass capacitor per TI layout guidelines |
| GND | Ground Reference | Common return path for all channels; must be low-impedance to sustain ±7.8mA transient currents |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger inputs | Enables reliable interfacing with slow-switching sensors (e.g., door latch microswitches) and unfiltered analog-derived digital signals |
| 3-state outputs with active-low OE | Allows dynamic bus contention avoidance in multi-master systems like distributed body controllers or diagnostic gateways |
| AEC-Q100 Grade 1 qualification | Validated for continuous operation at +125°C ambient - suitable for engine bay, HVAC, and ADAS domain controllers |
| Ultra-low ICC (100nA typ) | Supports >10-year battery life in low-duty-cycle monitoring circuits (e.g., intrusion detection, seat occupancy sensing) |
| ±7.8mA drive at 6V | Eliminates need for discrete transistor buffers when driving indicator LEDs or optocouplers in instrument clusters |
Applications
| Body Control Module Signal Conditioning | Automotive Sensor Interface |
|---|---|
Use Scenario: Isolating and debouncing switch inputs (e.g., door open/close, trunk release) before feeding to MCU GPIO. IC Role / Device Role / Timing Role: Quadruple buffer provides per-channel 3-state control and Schmitt-trigger noise rejection to prevent false interrupts. Use Value: Eliminates external RC filters and software debounce routines; reduces BOM count and firmware complexity while improving ASIL-B readiness. | Use Scenario: Conditioning analog-to-digital converter (ADC) reference clock enable signals in a multi-sensor fusion ECU. IC Role / Device Role / Timing Role: Buffer distributes clean, jitter-free enable pulses to multiple ADCs with precise edge alignment and bus isolation during sleep/wake transitions. Use Value: Maintains <5ns propagation delay matching across channels, ensuring synchronized sampling across sensor array without skew-induced measurement error. |
| LED Driver Enable Logic | LIN Bus Transceiver Interface |
Use Scenario: Driving status LEDs in headlamp control units where PWM dimming and fault indication share same LED pins. IC Role / Device Role / Timing Role: Buffers MCU PWM outputs while using OE pins to override illumination during fault conditions (e.g., overtemperature shutdown). Use Value: Enables hardware-level LED blanking without CPU intervention - critical for functional safety compliance (ISO 26262 ASIL-A). | Use Scenario: Isolating LIN transceiver TX/RX lines from MCU UART during bootloader mode or firmware update sequences. IC Role / Device Role / Timing Role: Acts as direction-controlled signal gate between MCU UART and LIN PHY, preventing bus contention during reconfiguration. Use Value: Supports hot-swappable firmware updates without LIN bus disruption; eliminates risk of dominant-bit collisions during reset transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCS125QDRQ1 | SOIC-14 package (9.90mm × 3.90mm); higher RθJA (133.6°C/W) vs. TSSOP's 151.7°C/W; identical electrical specs | Better suited for prototyping or legacy through-hole-compatible designs; less optimal for space-constrained modules | Select when board real estate allows larger footprint or when SOIC is required for assembly process compatibility |
| SN74HCS125QBQARQ1 | WQFN-14 package (3.00mm × 2.50mm); lower RθJA (109.7°C/W); includes thermal pad tied to GND | Superior thermal performance and density for high-temperature zones (e.g., power distribution units); requires solder paste stencil optimization | Select for next-gen compact ECUs where thermal margin and miniaturization outweigh reflow process complexity |
Compared with SN74HCS125QDRQ1 and SN74HCS125QBQARQ1, the SN74HCS125QPWRQ1 offers the best balance of thermal performance, board area efficiency, and manufacturability in automated SMT lines - making it ideal for mid-volume automotive modules requiring rapid time-to-market and proven assembly yield.
Availability
SN74HCS125QPWRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, sensor interface modules, LED driver control circuits, and LIN/UART isolation applications requiring stable component supply across extended product lifecycles.
Supply support for SN74HCS125QPWRQ1 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 automotive ICs, with decades of experience delivering AEC-Q100-qualified components for mission-critical vehicle systems.
The SN74HCS125QPWRQ1 belongs to TI's HCS logic family - designed specifically for automotive signal integrity, featuring Schmitt-trigger inputs, ultra-low power, and robust 3-state bus control to meet stringent EMI, thermal, and reliability demands of modern ECUs.
FAQ
What is the maximum capacitive load SN74HCS125QPWRQ1 can drive while maintaining specified timing?
The SN74HCS125QPWRQ1 is characterized to drive loads ≤50pF while meeting all datasheet timing specifications including propagation delay and transition time. Exceeding this capacitance increases rise/fall times and may cause timing violations in high-speed interfaces. For heavier loads, consider adding series termination or using a dedicated line driver. The SN74HCS125QPWRQ1 datasheet specifies CL = 50pF in the Switching Characteristics test conditions.
Does SN74HCS125QPWRQ1 require external pull-up or pull-down resistors on unused inputs?
Yes - unused inputs on SN74HCS125QPWRQ1 must be terminated to either VCC or GND to prevent floating states that cause increased ICC and potential oscillation. A 10kΩ resistor is recommended due to low input leakage (±100nA) and compatibility with standard MCU drive strength. Leaving inputs unconnected violates TI's layout guidelines and risks undefined logic behavior and elevated power consumption.
Can SN74HCS125QPWRQ1 outputs be paralleled for higher current drive?
Yes - two or more channels of SN74HCS125QPWRQ1 with identical inputs and OE states can be paralleled to increase output current capability beyond ±7.8mA. This technique is explicitly supported in the datasheet's Feature Description section. Ensure matched trace lengths and simultaneous enable control to avoid shoot-through; do not parallel outputs with differing OE or input states.
Is SN74HCS125QPWRQ1 compatible with 1.8V logic systems?
No - SN74HCS125QPWRQ1 has a minimum supply voltage of 2V and is not guaranteed to operate reliably at 1.8V. Its Schmitt-trigger thresholds (e.g., VT+ = 1.18V min at 2V VCC) and output VOH/VOL specs are defined only down to 2V. For 1.8V systems, consider TI's SN74LVC1G125 or similar LVC-family buffers with 1.65V–5.5V operation.
What is the function of the thermal pad in SN74HCS125QPWRQ1's TSSOP package?
The SN74HCS125QPWRQ1 in TSSOP (PW) package does not include a thermal pad - that feature is exclusive to the WQFN (BQA) variant per TI's Package Information table. The PW package relies on standard lead-frame conduction and PCB copper pour for thermal dissipation. No thermal pad connection is required or possible for SN74HCS125QPWRQ1.
SN74HCS125QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCS
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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:
- Schmitt Trigger
- Output Type:
- 3-State
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
SN74HCS125QPWRQ1 FAQ
1.How can I place an order for SN74HCS125QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HCS125QPWRQ1 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 SN74HCS125QPWRQ1 reliable?
The price and inventory of SN74HCS125QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HCS125QPWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74HCS125QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HCS125QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HCS125QPWRQ1?
SN74HCS125QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HCS125QPWRQ1 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 SN74HCS125QPWRQ1?
For technical support, including SN74HCS125QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HCS125QPWRQ1 requirements.
6.How does Aetrix verify that SN74HCS125QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74HCS125QPWRQ1 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 SN74HCS125QPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74HCS125QPWRQ1?
All SN74HCS125QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HCS125QPWRQ1, 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 SN74HCS125QPWRQ1 part is unused and in its original packaging.
Return procedure for SN74HCS125QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74HCS125QPWRQ1 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…
