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Texas Instruments SN74F151BNG4
- Part No.:
- SN74F151BNG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74F151BNG4.pdf
- Description:
- IC MULTIPLEXER 1 X 8:1 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,056
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Product details
Overview
SN74F151BNG4 from Texas Instruments is an 8-line to 1-line TTL multiplexer with active-low enable (G), dual complementary outputs (Y and W), and full binary decoding of A/B/C select lines. It operates from 4.5 V to 5.5 V, delivers 24 mA low-level output drive, supports 0°C to 70°C industrial temperature range, and functions as a data source selector in bus arbitration logic.
For engineers reviewing the SN74F151BNG4 datasheet, SN74F151BNG4 pinout, SN74F151BNG4 application, or SN74F151BNG4 equivalent, key selection criteria include its dual-output architecture, guaranteed 7 ns max propagation delay (G→Y), 16-pin PDIP package compatibility, and direct replacement capability for legacy 74F151-based control logic designs.
Technical Context
The SN74F151BNG4 implements a fully decoded 3-bit address decoder driving eight independent input gates, with strobe-controlled output enable. Its Y output follows selected Dn when G = L; W is its logical complement. No internal latching or clocking is present - operation is purely combinational.
It uses standard F-series TTL circuitry: bipolar transistor-based inputs with defined VIH/VIL thresholds (2.0 V/0.8 V), totem-pole outputs with specified IOH/IOL (−1 mA / 24 mA), and absolute maximum ratings including −1.2 V minimum input voltage and 7 V maximum VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL logic rails and noise margin compliance. |
| Operating Temperature | 0°C to 70°C - qualified for commercial/industrial ambient environments without derating. |
| Propagation Delay (G→Y) | Max 10.5 ns at VCC = 5 V, CL = 50 pF - enables use in sub-100 MHz synchronous control paths. |
| Output Drive (IOL) | 24 mA - sufficient to directly drive multiple 74F/TTL inputs or small LED indicators without buffering. |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - guarantees robust noise immunity and interoperability across 74F, 74LS, and 74AS families. |
| Complementary Outputs | Y and W - eliminates need for external inverters in enable/disable or select/deselect logic pairs. |
Pinout & Package
SN74F151BNG4 is supplied in a 16-pin plastic dual in-line package (PDIP-N), 300-mil width, with through-hole mounting and industry-standard pin spacing (0.1 inch). Pin 1 is marked by a notch or dot; pin 8 is GND, pin 16 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (D0) | Data Input 0 | Low-order data source selected when A=B=C=0; TTL-compatible input threshold. |
| 2 (D1) | Data Input 1 | Second data source enabled when A=1, B=C=0; matches all Dn inputs electrically. |
| 3 (D2) | Data Input 2 | Third data source activated at A=0,B=1,C=0; no internal pull-up/down. |
| 4 (D3) | Data Input 3 | Fourth data source for A=B=1,C=0; driven high/low by external logic only. |
| 5 (D4) | Data Input 4 | Fifth data source selected at A=1,B=C=0; identical DC/AC specs to D0–D3. |
| 6 (D5) | Data Input 5 | Sixth data source for A=0,B=1,C=1; requires external signal conditioning if >5 V. |
| 7 (D6) | Data Input 6 | Seventh data source at A=1,B=1,C=0; shares same input clamp current (−18 mA). |
| 8 (GND) | Ground Reference | Primary return path for all internal currents; must be low-impedance connection. |
| 9 (D7) | Data Input 7 | Highest-order data source selected when A=B=C=1; functionally identical to D0–D6. |
| 10 (C) | Select Line C | MSB of 3-bit binary address; level-sensitive, no edge triggering or internal debouncing. |
| 11 (B) | Select Line B | Mid-bit select input; transitions propagate through decode logic to outputs with defined tPLH/tPHL. |
| 12 (A) | Select Line A | LSB of address bus; timing-critical path affecting worst-case Y/W delay from address change. |
| 13 (W) | Inverted Output | Active-high complement of Y; used for negative-logic enable or differential signaling. |
| 14 (Y) | True Output | Main multiplexed output; drives downstream TTL loads directly with 24 mA sink capability. |
| 15 (G) | Strobe / Enable | Active-low global enable; forces Y=L and W=H when high - critical for bus isolation. |
| 16 (VCC) | Power Supply | +5 V supply rail; requires local 0.1 µF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Complementary Outputs (Y/W) | Eliminates need for external inverters in enable/disable or set/reset control circuits. |
| Active-Low Strobe (G) | Enables clean bus contention management - Y goes low and W high when disabled. |
| Full Binary Decoding | Direct mapping of A/B/C inputs to D0–D7 without external logic, reducing gate count. |
| TTL-Compatible I/O | Guaranteed VIH/VIL and IOL/IOH ensure plug-and-play integration with 74F/74LS/74AS systems. |
| 16-Pin PDIP Package | Supports through-hole prototyping, legacy board repair, and manual rework without SMT equipment. |
Applications
| Bus Arbitration Logic | Parallel-to-Serial Conversion |
|---|---|
Use Scenario: Selecting one of eight peripheral data buses onto a shared system data bus in microcontroller-based instrumentation. IC Role / Device Role / Timing Role: Data source selector enabling time-multiplexed access to ADC, DAC, EEPROM, and sensor interfaces. Use Value: Reduces PCB trace count and eliminates discrete OR-gate logic while maintaining deterministic 10.5 ns selection latency. |
Use Scenario: Converting parallel 8-bit status flags from a PLC I/O module into a serial stream for RS-485 transmission. IC Role / Device Role / Timing Role: Combinational multiplexer synchronized to a 3-bit counter clock to serialize parallel data. Use Value: Achieves reliable bit-sequential output without clock domain crossing or metastability risk. |
| Boolean Function Generation | Legacy System Repair |
Use Scenario: Implementing arbitrary 3-input logic functions (e.g., majority vote, parity, custom gate) in FPGA-constrained test fixtures. IC Role / Device Role / Timing Role: Truth table mapper using D0–D7 as function coefficients and A/B/C as variable inputs. Use Value: Delivers deterministic 7 ns propagation from input change to output update - faster than many CPLDs in simple functions. |
Use Scenario: Replacing failed SN74F151B units on 1990s-era industrial motion controller PCBs where redesign is cost-prohibitive. IC Role / Device Role / Timing Role: Drop-in functional and pinout-compatible replacement preserving original timing margins and layout. Use Value: Maintains system-level timing integrity with identical tPLH/tPHL specs and same 16-pin PDIP footprint. |
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 |
|---|---|---|---|
| SN74LS151N | Lower drive (8 mA IOL), slower (25 ns max G→Y), same pinout and logic function. | Acceptable where speed < 40 MHz and load count ≤ 2 TTL inputs; higher noise margin (VIL = 0.8 V same, but VIH = 2.0 V vs LS's 2.0 V). | Choose for lower power (19 mA ICC vs 21 mA) in non-speed-critical legacy upgrades. |
| SN74HC151N | CMOS technology: wider VCC range (2–6 V), rail-to-rail outputs, 5.5 mA IOL, 23 ns max G→Y. | Requires level-shifting if interfacing with 5 V TTL; unsuitable for direct 74F replacement without verifying fanout and timing. | Prefer only in new 3.3 V designs or mixed-voltage systems with proper interface design. |
Compared with SN74LS151N and SN74HC151N, the SN74F151BNG4 provides superior speed and drive strength for 5 V TTL systems, making it the optimal choice when maintaining legacy timing budgets and loading requirements is essential.
Availability
SN74F151BNG4 is available at Aetrix Electronics and suitable for industrial control panels, legacy test equipment refurbishment, and educational lab kits requiring stable component supply and long-term obsolescence mitigation.
Supply support for SN74F151BNG4 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 solutions with broad industrial and automotive qualification.
The SN74F151BNG4 belongs to TI's 74F Fast TTL logic family, designed specifically for high-speed digital control systems requiring predictable propagation delays and robust noise immunity in 5 V environments.
FAQ
What is the maximum operating frequency supported by the SN74F151BNG4?
The SN74F151BNG4 is a combinational logic device without an internal clock, so it does not have a rated operating frequency. Its usable switching rate depends on propagation delay and system setup/hold timing. With a maximum G→Y delay of 10.5 ns and typical address setup time under 5 ns, the SN74F151BNG4 supports reliable operation up to approximately 60 MHz in well-designed synchronous control paths.
Does the SN74F151BNG4 require external pull-up resistors on its inputs?
No, the SN74F151BNG4 does not require external pull-up resistors on its inputs. Its TTL-compatible inputs have built-in base-emitter junctions that provide defined logic thresholds (VIH = 2.0 V, VIL = 0.8 V) and internal current paths. Pull-ups are only needed if inputs float unconnected in a system - but best practice is to tie unused A/B/C or Dn pins to VCC or GND, not leave them open.
Can the SN74F151BNG4 drive LEDs directly?
Yes, the SN74F151BNG4 can drive standard 5 mm LEDs directly via its Y or W output when configured as a sink (LED anode to VCC, cathode to Y). With 24 mA guaranteed low-level output current and 0.5 V max VOL at 20 mA, it supports typical red/green/yellow LEDs at ~10–15 mA with appropriate series resistance - no buffer stage required.
Is the SN74F151BNG4 RoHS compliant?
Yes, the SN74F151BNG4 is RoHS compliant. Per TI's packaging documentation, the part carries NIPDAU (nickel/palladium/gold) lead finish and meets EU Directive 2011/65/EU requirements. The "G4" suffix explicitly denotes green (lead-free) packaging per TI's standard nomenclature.
How does the strobe (G) input affect output states in the SN74F151BNG4?
When the strobe (G) input is high, the SN74F151BNG4 disables data selection: Y is forced low and W is forced high, regardless of A/B/C or Dn states. When G is low, normal multiplexing resumes - Y reflects the selected Dn value and W mirrors its inverse. This behavior enables clean bus isolation and priority encoding in multi-master systems.
SN74F151BNG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74F
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
SN74F151BNG4 FAQ
1.How can I place an order for SN74F151BNG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74F151BNG4 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 SN74F151BNG4 reliable?
The price and inventory of SN74F151BNG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F151BNG4 is usually 5 days.
3.What payment methods are accepted for SN74F151BNG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F151BNG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74F151BNG4?
SN74F151BNG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74F151BNG4 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 SN74F151BNG4?
For technical support, including SN74F151BNG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F151BNG4 requirements.
6.How does Aetrix verify that SN74F151BNG4 is sourced from the original manufacturer or authorized distributors?
All SN74F151BNG4 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 SN74F151BNG4 meets industry standards.
7.What is the process for return or replacement of SN74F151BNG4?
All SN74F151BNG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74F151BNG4, 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 SN74F151BNG4 part is unused and in its original packaging.
Return procedure for SN74F151BNG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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