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Texas Instruments SN74HC151DR
- Part No.:
- SN74HC151DR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74HC151DR.pdf
- Description:
- IC MULTIPLEXER 1 X 8:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,382
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Product details
Overview
SN74HC151DR from Texas Instruments is an 8-line to 1-line CMOS data selector/multiplexer in SOIC-16 package, operating from 2 V to 6 V with typical propagation delay of 43 ns at 6 V and ±6-mA output drive at 5 V. It performs binary decoding to select one of eight data inputs (D0–D7) using address lines A, B, C and enables selection only when strobe (G) is low - used in digital logic routing, Boolean function generation, and parallel-to-serial conversion.
For engineers reviewing the SN74HC151DR datasheet, SN74HC151DR pinout, SN74HC151DR application, or SN74HC151DR equivalent, key selection criteria include its dual complementary outputs (Y and W), low ICC (≤80 μA), 10 LSTTL load drive capability, and compatibility with HC logic families across industrial temperature range (–40°C to +85°C).
Technical Context
The SN74HC151DR implements full binary decoding of three select inputs (A, B, C) to route one of eight data inputs to the standard output Y and inverted output W. Its enable-controlled architecture requires G = LOW for functional operation; G = HIGH forces Y = LOW and W = HIGH regardless of select or data states.
It uses standard CMOS silicon process with Schmitt-trigger input thresholds not specified - all inputs are TTL-compatible with VIH ≥ 3.15 V and VIL ≤ 1.35 V at VCC = 4.5 V. Switching performance is characterized at CL = 50 pF and supports tpd as low as 25 ns (6 V, 25°C) on address-to-output paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing and battery-powered logic designs. |
| Propagation Delay (tpd) | 25 ns max at 6 V (A/B/C → Y/W, CL = 50 pF) - enables reliable operation in 20-MHz+ digital control timing paths. |
| Output Drive | ±6 mA at 5 V - directly drives 10 LSTTL loads without buffering in legacy TTL-CMOS hybrid systems. |
| Quiescent Current (ICC) | 80 μA max at 6 V - suitable for low-power standby modes in portable or energy-constrained embedded logic. |
| Input Leakage Current | ±1 μA max - ensures stable logic levels with high-impedance pull-ups/pull-downs and prevents floating-input errors. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade PCB deployments without derating. |
| Package | SOIC-16 (D package), 9.90 mm × 3.90 mm body - compatible with standard surface-mount assembly and IPC-7351 land patterns. |
Pinout & Package
SN74HC151DR is housed in a 16-pin SOIC (D) package with 1.27-mm pitch, 9.90 mm × 3.90 mm footprint, and 1.75-mm maximum height. Pin 1 is located at the top-left corner with notch or bevel indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Strobe Enable Input | Active-low global enable: G = HIGH forces Y = LOW / W = HIGH; G = LOW enables normal multiplexing. |
| 2 (D0) | Data Input 0 | Low-order data source selected when A=B=C=0; TTL/CMOS-compatible input threshold. |
| 3 (D1) | Data Input 1 | Second data source selected when A=1, B=C=0; same electrical specs as D0–D7. |
| 4 (D2) | Data Input 2 | Third data source selected when B=1, A=C=0; no internal pull-up/down - must be driven or terminated. |
| 5 (D3) | Data Input 3 | Fourth data source selected when A=B=1, C=0; shares identical DC and AC characteristics with other D inputs. |
| 6 (D4) | Data Input 4 | Fifth data source selected when C=1, A=B=0; valid over full supply and temperature range. |
| 7 (D5) | Data Input 5 | Sixth data source selected when A=C=1, B=0; supports 100% duty-cycle switching at rated speed. |
| 8 (D6) | Data Input 6 | Seventh data source selected when B=C=1, A=0; no shoot-through or latch-up risk under recommended conditions. |
| 9 (D7) | Data Input 7 | Highest-order data source selected when A=B=C=1; electrically identical to D0–D6. |
| 10 (C) | Select Input C | MSB of 3-bit binary address; controls selection of D4–D7 vs D0–D3 group. |
| 11 (B) | Select Input B | Intermediate select bit; combined with A and C determines exact Dn path to Y/W. |
| 12 (A) | Select Input A | LSB of address bus; toggling A switches between adjacent pairs (e.g., D0↔D1, D2↔D3). |
| 13 (W) | Inverted Output | Complement of Y output; active simultaneously - no additional delay or inversion stage required. |
| 14 (Y) | Standard Output | Selected data value (Dn) passed through when G = LOW; rail-to-rail CMOS swing. |
| 15 (VCC) | Positive Supply | Connects to main logic supply (2–6 V); requires local 0.1-μF bypass capacitor per TI layout guidelines. |
| 16 (GND) | Ground Reference | Return path for all I/O and supply currents; tie to system ground plane with low-inductance connection. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 2 V to 6 V operation allows interoperability with 3.3 V microcontrollers, 5 V legacy peripherals, and 2.5 V low-power subsystems. |
| Dual Complementary Outputs | Simultaneous Y (true) and W (inverted) outputs eliminate need for external inverters in combinational logic or parity generation. |
| Low Power Consumption | Max ICC = 80 μA at 6 V enables use in always-on logic monitoring circuits without thermal or battery-life penalties. |
| TTL-Compatible Drive | ±6 mA output current at 5 V meets LSTTL fan-out requirements, simplifying interface with older logic families. |
| Controlled Enable Architecture | Strobe (G) input provides synchronous gating - essential for time-multiplexed data acquisition and clock-domain isolation. |
Applications
| Industrial Control Logic | Digital Test Equipment |
|---|---|
|
Use Scenario: Routing sensor data streams from eight analog front-ends into a single ADC channel under microcontroller command. IC Role / Device Role / Timing Role: Data selector synchronizing multi-channel sampling with precise address sequencing and strobe-gated validity window. Use Value: Reduces component count versus discrete gate solutions while maintaining deterministic 43-ns worst-case latency at 6 V. |
Use Scenario: Generating programmable test vectors for IC functional verification using stored pattern memory. IC Role / Device Role / Timing Role: Boolean-function generator mapping 3-bit address codes to precomputed logic outputs via D0–D7 wiring. Use Value: Enables real-time reconfiguration of combinatorial logic behavior without FPGA or CPLD resources. |
| Communications Interface Mux | Embedded System Resource Sharing |
|
Use Scenario: Arbitrating access to a shared UART or SPI bus among eight peripheral modules in a modular IoT node. IC Role / Device Role / Timing Role: Parallel-to-serial converter translating parallel device-select signals into time-division-multiplexed serial data flow. Use Value: Eliminates need for software-controlled GPIO toggling and reduces host CPU overhead by hardware-level arbitration. |
Use Scenario: Sharing a single display driver or audio DAC between multiple application cores in a multi-tasking MCU. IC Role / Device Role / Timing Role: Data source selector enabling context-aware resource routing based on OS scheduler state. Use Value: Provides glitch-free handoff between sources using synchronized G assertion and address hold timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-to-1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT151DR | CMOS input thresholds (VIH/VIL fixed at 2 V/0.8 V), TTL-compatible but narrower noise margin than HC; identical pinout and timing. | Better suited for mixed 5 V TTL/CMOS systems where input voltage translation is needed; less tolerant of slow-rising edges. | Choose SN74HCT151DR if interfacing directly with 5 V TTL outputs; otherwise SN74HC151DR offers wider supply flexibility and lower ICC. |
| CD74HC151M96 | Same HC-family specs and SOIC-16 package; manufactured by Texas Instruments under alternate orderable ID with identical electrical behavior. | No functional difference - used interchangeably in BOMs where distributor stock or tape-and-reel configuration differs. | CD74HC151M96 is a direct second-source variant; verify reel orientation (Q1 quadrant) and MSL Level-1 compliance match before substitution. |
Compared with SN74HCT151DR and CD74HC151M96, the SN74HC151DR provides optimal balance of supply voltage range (2–6 V), ultra-low quiescent current (80 μA), and industrial temperature support - making it preferred for battery-operated or mixed-voltage embedded logic where power efficiency and design margin matter most.
Availability
SN74HC151DR is available at Aetrix Electronics and suitable for industrial control logic, digital test equipment, communications interface mux, and embedded system resource sharing requiring stable component supply and long-term manufacturability.
Supply support for SN74HC151DR 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 founded in 1930, specializing in analog, embedded processing, and logic ICs with broad industrial, automotive, and consumer reach.
The SN74HC151DR belongs to TI's 74HC logic family - designed for high-speed, low-power CMOS replacement of legacy TTL in general-purpose digital systems with robust noise immunity and wide supply tolerance.
FAQ
What is the maximum clock/data toggle rate supported by SN74HC151DR?
The SN74HC151DR does not operate on a clock signal - it is asynchronous. Its maximum reliable data switching rate is determined by propagation delay and transition time: at 6 V and CL = 50 pF, tpd = 25 ns (min), allowing stable operation up to ~20 MHz for address and data setup/hold compliance. The SN74HC151DR must meet input transition time limits (≤400 ns at 6 V) to avoid metastability.
Does SN74HC151DR require external pull-up resistors on its inputs?
No - the SN74HC151DR has CMOS inputs with negligible leakage (±1 μA max), so unused inputs must be actively tied to VCC or GND per TI guidelines to prevent floating states and undefined outputs. External pull-ups are unnecessary and may interfere with driven signals; direct hard-wiring is preferred for reliability.
Can SN74HC151DR drive LEDs directly?
The SN74HC151DR can sink or source up to ±6 mA at 5 V, which is sufficient for low-current indicator LEDs (e.g., 2-mA red LED with 1.8-V forward voltage and 1.6-kΩ series resistor). However, it is not designed for continuous LED driving; for higher-current or PWM-brightened LEDs, use a dedicated driver or transistor buffer to avoid exceeding absolute max output current (±35 mA).
Is SN74HC151DR pin-compatible with SN74LS151?
No - although both are 8-to-1 multiplexers in 16-pin packages, the SN74HC151DR (SOIC) and SN74LS151 (PDIP/SOIC) differ in pin functions: LS151 uses enable inputs E1/E2 instead of single strobe G, and lacks complementary W output. Signal routing, PCB layout, and timing margins are not interchangeable; redesign is required for migration.
What is the meaning of "DR" in SN74HC151DR?
The "DR" suffix in SN74HC151DR denotes Texas Instruments' SOIC-16 package with tape-and-reel delivery (2500 units per reel), RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH). It distinguishes this version from tube-packaged variants like SN74HC151N or obsolete variants like SN74HC151DT.
SN74HC151DR 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:
- Active
- 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 ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SN74HC151DR FAQ
1.How can I place an order for SN74HC151DR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC151DR 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 SN74HC151DR reliable?
The price and inventory of SN74HC151DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC151DR is usually 5 days.
3.What payment methods are accepted for SN74HC151DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC151DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC151DR?
SN74HC151DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC151DR 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 SN74HC151DR?
For technical support, including SN74HC151DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC151DR requirements.
6.How does Aetrix verify that SN74HC151DR is sourced from the original manufacturer or authorized distributors?
All SN74HC151DR 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 SN74HC151DR meets industry standards.
7.What is the process for return or replacement of SN74HC151DR?
All SN74HC151DR units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC151DR, 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 SN74HC151DR part is unused and in its original packaging.
Return procedure for SN74HC151DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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