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Texas Instruments SN74F151BD
- Part No.:
- SN74F151BD
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74F151BD.pdf
- Description:
- IC MULTIPLEXER 1 X 8:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,902
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Product details
Overview
SN74F151BD from Texas Instruments is an 8-line to 1-line TTL multiplexer IC used for data routing, Boolean function generation, and parallel-to-serial conversion in digital logic systems. It features three select inputs (A, B, C), one active-low strobe (G), complementary outputs (Y and W), operates at 5 V supply, supports 0°C to 70°C ambient, and delivers tPHL/tPLH propagation delays as low as 2.7 ns (data to Y) with 24 mA low-level output drive.
For engineers reviewing the SN74F151BD datasheet, SN74F151BD pinout, SN74F151BD application, or SN74F151BD equivalent, key selection considerations include its dual-output (Y/W) active-high/active-low logic behavior, strict 5 V ±10% supply requirement, SOIC-16 package footprint, and compatibility with legacy 74F-series TTL logic families in industrial control and instrumentation signal routing.
Technical Context
The SN74F151BD implements full binary decoding across three address lines (A, B, C) to route one of eight data inputs (D0–D7) to the Y output when strobe G is low; W provides inverted output. Its internal architecture uses standard TTL bipolar transistor logic with Schottky clamping for speed and noise immunity.
Strobe G forces Y = low and W = high when high, enabling synchronous enable/disable control. Output drive capability is asymmetric: IOL = 24 mA (min) at VOL ≤ 0.5 V, while IOH = −1 mA (max) at VOH ≥ 2.5 V, reflecting classic TTL current-sinking dominance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Requires regulated 5 V rail; operation outside this range risks functional failure or damage. |
| Operating Temperature | 0°C to 70°C - Rated for commercial-grade environments only; not suitable for extended industrial or automotive under-hood use. |
| Propagation Delay | tPHL/tPLH ≤ 9.5 ns (A/B/C to Y) - Enables reliable operation up to ~100 MHz toggle rate in short-path combinational logic. |
| Output Drive | IOL = 24 mA (min), IOH = −1 mA (max) - Designed to sink significant current but weakly source; best interfaced with TTL or CMOS inputs with pull-up bias. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - Compatible with standard TTL logic levels; not 5 V CMOS-compatible without level translation. |
| Package Type | SOIC-16 (D package) - 3.9 mm body width, 1.27 mm pitch; compatible with automated SMT assembly and IPC-7351 land patterns. |
Pinout & Package
SN74F151BD is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package per TI's D package drawing, with 1.27 mm lead pitch, 3.9 mm body width, and 1.75 mm max height. Pin 1 is marked by a beveled corner or notch on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (D0) | Data Input 0 | Low-order data source selected when A=B=C=0 and G=L; directly routed to Y output. |
| 2 (D1) | Data Input 1 | Second data source activated when A=1, B=C=0 and G=L; no internal buffering or slew control. |
| 3 (D2) | Data Input 2 | Third data input; shares identical DC and AC electrical specs with D0–D7. |
| 4 (D3) | Data Input 3 | One of eight fully equivalent TTL-compatible inputs; no priority or latching behavior. |
| 5 (Y) | True Output | Active-high selected data output; driven low when G=H regardless of select inputs. |
| 6 (W) | Inverted Output | Complementary to Y; driven high when G=H, low when G=L and corresponding Dn is low. |
| 7 (G) | Strobe (Enable) | Active-low global enable; overrides all select inputs when high, forcing Y=L/W=H. |
| 8 (GND) | Ground Reference | Primary return path for all internal currents; must be low-impedance and decoupled near VCC pin. |
| 9 (C) | Select Input MSB | Highest-order binary address bit; determines upper/lower half of D0–D7 group selection. |
| 10 (B) | Select Input Middle | Mid-order address bit; combines with A and C to uniquely decode one of eight data paths. |
| 11 (A) | Select Input LSB | Lowest-order address bit; completes 3-bit binary selection vector for D0–D7 routing. |
| 12 (D4) | Data Input 4 | Upper-half data input; selected when C=1, A=B=0 and G=L. |
| 13 (D5) | Data Input 5 | Matches D0–D3 electrically; no internal differentiation between lower/upper data groups. |
| 14 (D6) | Data Input 6 | Valid TTL input with VIH/VIL thresholds matching entire device family. |
| 15 (D7) | Data Input 7 | High-order data input; selected only when A=B=C=1 and G=L. |
| 16 (VCC) | Power Supply | +5 V DC supply pin; requires local 0.1 µF ceramic decoupling to GND (Pin 8) for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Complementary Outputs | Simultaneous true (Y) and inverted (W) outputs eliminate need for external inverters in feedback or differential logic paths. |
| Active-Low Strobe Control | G input enables synchronous gating of all eight data paths-critical for time-multiplexed sampling or clocked bus arbitration. |
| Full Binary Decoding | Three select lines (A/B/C) directly map to D0–D7 without external logic, reducing gate count in address-decoded systems. |
| TTL-Compatible Interface | Meets standard 74F-series VIH/VIL, IOL/IOH, and noise margin specs-ensures plug-in compatibility with legacy 74xx/74LS designs. |
| SOIC-16 Footprint | Standardized 16-pin SOIC package allows drop-in replacement of PDIP versions (e.g., SN74F151BN) in space-constrained PCB layouts. |
Applications
| Industrial PLC I/O Multiplexing | Digital Test Equipment Signal Routing |
|---|---|
|
Use Scenario: Consolidating 8 discrete sensor inputs into a single ADC channel in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Data selector that routes one of eight analog-conditioned signals to a shared successive-approximation ADC front-end. Use Value: Reduces component count and board area versus eight individual ADC channels; maintains TTL-level timing integrity with sub-10 ns propagation delay. |
Use Scenario: Switching between multiple reference voltages or calibration sources during automated test sequence execution. IC Role / Device Role / Timing Role: Precision source selector synchronized to test controller strobe (G) to avoid glitches during voltage transitions. Use Value: Eliminates mechanical relay wear and contact bounce; enables microsecond-scale reconfiguration via digital control lines. |
| Legacy Computer Bus Arbitration | Boolean Logic Function Generator |
|
Use Scenario: Managing access to shared memory or peripheral slots in vintage minicomputer backplanes using discrete TTL control logic. IC Role / Device Role / Timing Role: Priority encoder interface that selects active bus master based on encoded request lines (A/B/C) and grant strobe (G). Use Value: Provides deterministic, race-free bus grant resolution with guaranteed setup/hold timing margins per F-series spec. |
Use Scenario: Implementing arbitrary 3-variable combinational logic (e.g., parity, majority vote, custom gate arrays) without PLDs or CPLDs. IC Role / Device Role / Timing Role: Truth-table mapper where D0–D7 pins are hardwired to VCC/GND to encode minterms, and A/B/C serve as logic variables. Use Value: Achieves full 3-input function synthesis in one IC with zero external gates-ideal for prototyping or low-volume ASIC replacement. |
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 |
|---|---|---|---|
| SN74F151BN | Same logic function and AC/DC specs, but in 16-pin PDIP (N) package with 0.3″ width and through-hole mounting. | Preferred for breadboarding, prototyping, or legacy through-hole production; incompatible with SMT assembly lines. | Select SN74F151BN only if manual assembly, socketing, or thermal mass requirements favor DIP over SOIC. |
| SN74LS151N | Lower power (ICC ≈ 24 mA vs. 21 mA), slower propagation (tPD ≈ 22 ns vs. 9.5 ns), same pinout and logic behavior. | Better suited for static or low-speed control logic where power efficiency outweighs speed; not interchangeable in high-frequency data paths. | Choose SN74LS151N when system clock rates stay below 20 MHz and board-level power budget is constrained. |
Compared with SN74F151BN and SN74LS151N, the SN74F151BD offers superior speed in a surface-mount package but requires stricter 5 V regulation and delivers higher dynamic power-making it optimal for compact, high-throughput digital systems where layout density and timing closure are critical.
Availability
SN74F151BD is available at Aetrix Electronics and suitable for industrial PLC I/O modules, digital test equipment signal routing, legacy computer bus arbitration, and Boolean logic function generation requiring stable component supply across long-lifecycle embedded programs.
Supply support for SN74F151BD 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 founded in 1930, specializing in analog, embedded processing, and logic ICs with broad industrial, automotive, and communications market reach.
The SN74F151BD belongs to TI's 74F Fast TTL logic family, engineered for high-speed digital signal routing and combinational logic synthesis in systems demanding sub-10 ns propagation and robust noise immunity.
FAQ
What is the operating voltage range for the SN74F151BD?
The SN74F151BD operates strictly within 4.5 V to 5.5 V DC. Operation below 4.5 V may cause marginal logic thresholds or increased propagation delay; above 5.5 V risks permanent damage per absolute maximum ratings. The SN74F151BD is not 3.3 V tolerant and requires a dedicated 5 V regulator or LDO in mixed-voltage systems.
Does the SN74F151BD support hot insertion or live swapping?
No, the SN74F151BD does not support hot insertion. Its absolute maximum input voltage rating is −1.2 V to 7 V, and applying power or signals before VCC stabilization can cause latch-up or parametric shift. Always power VCC before applying input signals, and ensure GND is established first during system startup sequences involving the SN74F151BD.
How does the strobe (G) pin affect output states on the SN74F151BD?
When G is high, the SN74F151BD forces Y = low and W = high regardless of A, B, C, or Dn states-effectively disabling data routing. When G is low, normal multiplexing resumes: Y reflects the selected Dn value and W is its logical inverse. This behavior makes G ideal for synchronous gating in time-division systems using the SN74F151BD.
Can the SN74F151BD drive LED loads directly?
The SN74F151BD can sink up to 24 mA per output (Y or W) at VOL ≤ 0.5 V, sufficient to drive standard 2 mA–10 mA indicator LEDs with appropriate series resistors. However, it cannot source meaningful current (IOH = −1 mA max), so LEDs must be connected anode-to-VCC and cathode-to-Y/W. Driving multiple LEDs simultaneously may exceed total ICC limits and requires thermal validation for the SN74F151BD.
Is the SN74F151BD pin-compatible with CMOS multiplexers like CD4051?
No, the SN74F151BD is not pin-compatible with CD4051 or other CMOS multiplexers. It uses a different pinout (e.g., CD4051 has INH, Z, and analog I/O on different pins), operates at fixed 5 V TTL levels (not wide-voltage CMOS), and lacks analog switching capability. Interfacing requires level translation and PCB redesign-no direct substitution is possible for the SN74F151BD.
SN74F151BD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74F
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 1 x 8:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 1mA, 24mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SN74F151BD FAQ
1.How can I place an order for SN74F151BD through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74F151BD 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 SN74F151BD reliable?
The price and inventory of SN74F151BD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F151BD is usually 5 days.
3.What payment methods are accepted for SN74F151BD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F151BD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74F151BD?
SN74F151BD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74F151BD 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 SN74F151BD?
For technical support, including SN74F151BD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F151BD requirements.
6.How does Aetrix verify that SN74F151BD is sourced from the original manufacturer or authorized distributors?
All SN74F151BD 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 SN74F151BD meets industry standards.
7.What is the process for return or replacement of SN74F151BD?
All SN74F151BD units undergo pre-shipment inspection (PSI). If there is an issue with SN74F151BD, 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 SN74F151BD part is unused and in its original packaging.
Return procedure for SN74F151BD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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