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Texas Instruments SN74HC151QDRG4Q1
- Part No.:
- SN74HC151QDRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74HC151QDRG4Q1.pdf
- Description:
- IC MULTIPLEXER 1 X 8:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,606
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Product details
Overview
SN74HC151QDRG4Q1 from Texas Instruments is an automotive-qualified 8-line to 1-line data selector/multiplexer in a 16-pin SOIC package, operating from 2 V to 6 V, delivering ±6-mA output drive at 5 V, with low 1 µA max input current, used for Boolean-function generation and parallel-to-serial conversion in vehicle control modules.
For engineers reviewing the SN74HC151QDRG4Q1 datasheet, SN74HC151QDRG4Q1 pinout, SN74HC151QDRG4Q1 application, or SN74HC151QDRG4Q1 equivalent, key selection criteria include automotive temperature range (–40°C to 125°C), dual complementary outputs (Y active-high, W active-low), strobe-enabled operation, and binary-select decoding of eight data inputs.
Technical Context
The SN74HC151QDRG4Q1 implements positive-logic 3-bit binary address decoding (A, B, C) to route one of eight digital inputs (D0–D7) to the Y output, while its complementary W output provides inverted logic. Strobe (G) must be low to enable selection; high G forces Y low and W high.
It operates within TI's HC logic family, featuring CMOS technology with TTL-compatible output drive, rail-to-rail input voltage tolerance (0 to VCC), and guaranteed switching performance down to 2 V supply - enabling direct interface with microcontrollers, sensors, and legacy 5-V systems in automotive ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 6 V - supports mixed-voltage system integration and battery-supplied automotive subsystems. |
| Operating Temperature | –40°C to 125°C - qualified per AEC-Q100 for engine bay and transmission control units. |
| Output Drive | ±6 mA at 5 V - drives 10 LSTTL loads directly without buffering in signal routing applications. |
| Propagation Delay | 25 ns typical (VCC = 4.5 V) - enables reliable timing in sub-40-MHz digital control paths. |
| Input Current | ≤1 µA max - minimizes leakage impact on high-impedance address/control busses. |
| Power Dissipation Cap | 70 pF - defines dynamic power consumption under 50-pF load at 1-MHz toggle rate. |
Pinout & Package
Package: 16-pin SOIC (D package), 1.27 mm pitch, body width 3.9 mm, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Strobe Enable | Active-low global enable: high forces Y = L, W = H regardless of select inputs. |
| 2–4 (A, B, C) | Binary Address Inputs | 3-bit select code (CBA) determines which D-input routes to Y/W outputs. |
| 5–12 (D0–D7) | Data Inputs | Eight independent digital inputs; only one selected by A/B/C passes through when G = L. |
| 13 (Y) | True Output | Active-high selected data output; logic level matches selected Dn input. |
| 14 (W) | Complementary Output | Active-low inverted version of Y; provides simultaneous true/inverted signals. |
| 15 (VCC) | Power Supply | Positive supply rail (2–6 V); decoupling capacitor required near pin for noise immunity. |
| 16 (GND) | Ground Reference | Return path for all I/O and internal logic; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Complementary Outputs | Y (true) and W (inverted) outputs eliminate need for external inverters in feedback or differential routing. |
| Strobe-Controlled Enable | G input allows synchronized multiplexing across multiple devices or time-gated data sampling. |
| Automotive Qualification | AEC-Q100 Grade 1 qualification ensures reliability in harsh thermal/vibration environments. |
| Wide Voltage Operation | 2–6 V supply range supports 3.3-V microcontrollers and legacy 5-V peripherals without level shifters. |
| Low Dynamic Power | 70-pF power dissipation capacitance enables efficient operation in battery-powered telematics modules. |
Applications
| Engine Control Unit (ECU) Signal Routing | Body Control Module (BCM) Input Multiplexing |
|---|---|
Use Scenario: Consolidating sensor inputs (e.g., knock, MAP, throttle position) onto a single MCU ADC channel via time-division sampling. IC Role / Device Role / Timing Role: Data selector enabling sequential sampling of up to eight analog sensor signals conditioned by external comparators or ADC drivers. Use Value: Reduces MCU pin count and PCB trace count while maintaining deterministic sampling order and minimal propagation delay skew. | Use Scenario: Selecting between multiple switch banks (door locks, window switches, mirror controls) for centralized status monitoring. IC Role / Device Role / Timing Role: Digital multiplexer routing discrete switch closures to a shared GPIO interrupt line with address-encoded identification. Use Value: Enables single-interrupt architecture with software-decoded source, lowering firmware complexity and GPIO resource usage. |
| Instrument Cluster Display Logic | Transmission Control Unit (TCU) Mode Selection |
Use Scenario: Switching between speedometer, tachometer, and fuel gauge data sources based on driver mode selection. IC Role / Device Role / Timing Role: Boolean-function generator implementing custom logic equations to map mode bits to display data bus segments. Use Value: Eliminates need for dedicated PLD or FPGA in cost-sensitive clusters while supporting real-time reconfiguration. | Use Scenario: Selecting gear ratio lookup tables or torque limit profiles based on vehicle speed, throttle, and temperature inputs. IC Role / Device Role / Timing Role: Parallel-to-serial converter feeding precomputed calibration data into a TCU's lookup engine via serial bus interface. Use Value: Accelerates profile switching latency versus EEPROM read cycles, improving shift responsiveness under transient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data selector/multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC151QDRQ1 | Same die, identical electrical specs, identical SOIC-16 package; differs only in tape-and-reel marking (HC151Q vs HC151QG4). | No functional difference; both qualified for automotive use; HC151QG4 marking indicates G4 revision per TI internal tracking. | Select SN74HC151QDRG4Q1 when G4-marked reels are specified in procurement documentation or for traceability alignment with TI's latest production release. |
| SN74HCS151QDRQ1 | Includes Schmitt-trigger inputs for improved noise immunity on address lines; otherwise identical pinout, function, and supply range. | Better suited for noisy harness environments where A/B/C signals lack filtering; slightly higher input capacitance (12 pF vs 10 pF). | Choose SN74HCS151QDRQ1 when address lines run alongside high-current solenoid drivers or PWM traces without RC filtering. |
Compared with SN74HC151QDRG4Q1, SN74HC151QDRQ1 offers identical functionality with minor marking variance, while SN74HCS151QDRQ1 adds Schmitt-trigger inputs for robustness in electrically noisy domains - making it preferable for under-hood wiring without added filtering components.
Availability
SN74HC151QDRG4Q1 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and transmission control units requiring stable component supply across automotive production lifecycles.
Supply support for SN74HC151QDRG4Q1 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 U.S.-based semiconductor company specializing in analog, embedded processing, and automotive-grade logic solutions with over 50 years of industry leadership.
The SN74HC151QDRG4Q1 belongs to TI's automotive HC logic family, designed specifically for signal routing, data selection, and Boolean logic implementation in safety-critical vehicle subsystems operating across extended temperature ranges.
FAQ
What is the function of the G (strobe) pin on the SN74HC151QDRG4Q1?
The G pin on the SN74HC151QDRG4Q1 is an active-low strobe enable input. When G is high, the Y output is forced low and the W output is forced high, disabling data selection regardless of A/B/C or D inputs. Only when G is low does the device respond to address inputs and pass the selected Dn signal to Y and W. This allows synchronous gating of multiplexing across multiple devices or integration into clocked control sequences.
Does the SN74HC151QDRG4Q1 support 3.3-V operation?
Yes, the SN74HC151QDRG4Q1 fully supports 3.3-V operation within its specified 2-V to 6-V supply range. At VCC = 3.3 V, it maintains valid VIH/VIL thresholds (VIH ≥ 2.31 V, VIL ≤ 0.99 V), delivers ≥±4.5 mA output drive, and exhibits typical propagation delay of ~35 ns - making it compatible with 3.3-V microcontrollers and FPGAs without level translation.
How does the SN74HC151QDRG4Q1 differ from the standard SN74HC151?
The SN74HC151QDRG4Q1 is the AEC-Q100 qualified automotive version of the SN74HC151, with identical logic function and pinout but extended temperature range (–40°C to 125°C vs –40°C to 85°C), enhanced ESD protection (2-kV HBM), stricter process controls, and certified manufacturing traceability. It also uses automotive-grade packaging (MSL-1, NIPDAU finish) and undergoes additional reliability testing per TI's automotive quality standards.
Can unused inputs on the SN74HC151QDRG4Q1 be left floating?
No, unused inputs on the SN74HC151QDRG4Q1 must not be left floating. TI explicitly requires all unused inputs to be tied to VCC or GND to prevent undefined logic states, increased power consumption, and potential oscillation due to CMOS input sensitivity. Floating address or data inputs may cause erratic Y/W output behavior and violate AEC-Q100 reliability requirements in automotive deployments.
What is the meaning of "Q1" and "G4" in SN74HC151QDRG4Q1?
In SN74HC151QDRG4Q1, "Q1" denotes AEC-Q100 qualification for automotive applications, while "G4" identifies the specific fabrication and test revision level per TI's internal tracking system - indicating updated wafer processing, final test screening, or package assembly iteration. The "Q1" suffix is functionally critical for automotive use; "G4" reflects manufacturing maturity but does not alter electrical specifications or pin compatibility.
SN74HC151QDRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Multiplexer
- Circuit:
- 1 x 8:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 7.8mA, 7.8mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SN74HC151QDRG4Q1 FAQ
1.How can I place an order for SN74HC151QDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC151QDRG4Q1 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 SN74HC151QDRG4Q1 reliable?
The price and inventory of SN74HC151QDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC151QDRG4Q1 is usually 5 days.
3.What payment methods are accepted for SN74HC151QDRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC151QDRG4Q1 transactions.
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4.How is shipping managed for SN74HC151QDRG4Q1?
SN74HC151QDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC151QDRG4Q1 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 SN74HC151QDRG4Q1?
For technical support, including SN74HC151QDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC151QDRG4Q1 requirements.
6.How does Aetrix verify that SN74HC151QDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74HC151QDRG4Q1 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 SN74HC151QDRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74HC151QDRG4Q1?
All SN74HC151QDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC151QDRG4Q1, 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 SN74HC151QDRG4Q1 part is unused and in its original packaging.
Return procedure for SN74HC151QDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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