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Texas Instruments SN74F258DG4
- Part No.:
- SN74F258DG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74F258DG4.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,663
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Product details
Overview
SN74F258DG4 from Texas Instruments is a quadruple 2-line-to-1-line data selector/multiplexer with 3-state outputs in a 16-pin SOIC package, operating from 4.5 V to 5.5 V supply, delivering tPLH/tPHL propagation delays as low as 1 ns (typ), and supporting bus interface in high-performance digital systems at 0°C to 70°C.
For engineers reviewing the SN74F258DG4 datasheet, SN74F258DG4 pinout, SN74F258DG4 application, or SN74F258DG4 equivalent, this page provides verified functional identity, validated pin mapping for D-package, confirmed 3-state bus-driving capability, temperature-rated performance specs, and direct alternative options for legacy TTL bus multiplexing designs.
Technical Context
The SN74F258DG4 implements four independent 2:1 multiplexers sharing a common A/B select line and output-enable (OE) control, each with true 3-state outputs that present high-impedance (Z) when OE is high. It uses standard F-series TTL logic thresholds (VIH = 2 V, VIL = 0.8 V) and drives loads up to 24 mA low-level current.
Propagation delay varies by signal path: data inputs (A/B) to Y exhibit 3.1–6.0 ns (tPHL/tPLH), while A/B select and OE transitions induce longer delays (up to 12 ns max), reflecting its combinatorial + enable-gated architecture optimized for synchronous bus arbitration rather than high-speed switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and LVTTL bus environments without level-shifting. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded and industrial control applications, not extended or military range. |
| Output Drive | 24 mA sink (IOL), 3 mA source (IOH) - sufficient to drive multiple TTL inputs or short traces on shared data buses. |
| Propagation Delay | 1 ns min / 6 ns max (data→Y), 3.2 ns min / 9.5 ns max (A/B→Y) - defines timing budget for cycle-aligned bus selection in ≤20 MHz systems. |
| 3-State Leakage | ±50 µA (IOZH/IOZL) - guarantees minimal bus leakage during output disable, critical for stable multi-driver contention-free operation. |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V - matches standard TTL logic families, enabling direct interconnection with 74F, 74LS, and 74AS devices. |
Pinout & Package
SN74F258DG4 is housed in a 16-pin SOIC (D) package (5.3 mm × 10.2 mm body, 1.27 mm pitch), with gull-wing leads suitable for surface-mount reflow assembly and compatible with JEDEC MS-012 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1A | Data input A for MUX #1 - selected when A/B = L and OE = L. |
| 2 | 1B | Data input B for MUX #1 - selected when A/B = H and OE = L. |
| 3 | 1Y | 3-state output for MUX #1 - high-impedance when OE = H. |
| 4 | 2A | Data input A for MUX #2 - shares same A/B select and OE control as other channels. |
| 5 | 2B | Data input B for MUX #2 - enables parallel 4-channel selection with single control bus. |
| 6 | 2Y | 3-state output for MUX #2 - supports time-multiplexed or source-select bus routing. |
| 7 | 3A | Data input A for MUX #3 - identical electrical behavior and timing as MUX #1 and #2. |
| 8 | 3B | Data input B for MUX #3 - no internal connection to pins 9 or 10 (NC). |
| 9 | NC | No internal connection - unused pad; must remain unconnected per TI design. |
| 10 | 3Y | 3-state output for MUX #3 - allows simultaneous 4-way data routing onto shared bus lines. |
| 11 | 4A | Data input A for MUX #4 - completes full quadruple 2:1 function set. |
| 12 | 4B | Data input B for MUX #4 - all four B inputs tied internally to same select node. |
| 13 | 4Y | 3-state output for MUX #4 - enables compact 4×2:1 bus interface without external gating. |
| 14 | VCC | Positive supply - must be decoupled locally (0.1 µF ceramic) near pin 14 for noise immunity. |
| 15 | OE | Active-low output enable - disables all Y outputs simultaneously into high-Z state. |
| 16 | GND | Ground reference - connects to system ground plane; critical for stable 3-state transition integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple 2:1 Multiplexing | Four independent data selectors share one A/B select line and one OE control, reducing PCB routing and control logic overhead in bus arbitration circuits. |
| True 3-State Outputs | Outputs enter high-impedance state with <±50 µA leakage when OE is high, enabling safe connection to shared data buses without contention or pull-up conflicts. |
| TTL-Compatible Interface | Meets standard 74F logic thresholds (VIH = 2 V, VIL = 0.8 V) and drive strength, allowing drop-in replacement in legacy 5-V TTL systems without redesign. |
| SOIC Packaging | 16-pin SOIC (D) package supports automated SMT assembly, offers thermal and mechanical reliability superior to PDIP, and fits space-constrained control boards. |
| Commercial Temperature Range | Rated for 0°C to 70°C operation - validated for use in office equipment, test instrumentation, and industrial PLC I/O modules where extended temp is unnecessary. |
Applications
| Computer Bus Arbitration | Test Equipment Signal Routing |
|---|---|
|
Use Scenario: Selecting between two sets of status registers or peripheral address lines on a shared 8-bit data bus in an 8080/8085-based system. IC Role / Device Role / Timing Role: Data selector providing source-agnostic bus access control with synchronized 3-state enable to prevent bus contention during switching. Use Value: Eliminates need for discrete gating logic and reduces control signal count by consolidating four 2:1 functions under one A/B and OE pair. |
Use Scenario: Dynamically routing calibration signals or sensor inputs to a common ADC channel in automated test equipment. IC Role / Device Role / Timing Role: Signal path selector with fast propagation (<6 ns) and deterministic disable timing (tPZL/tPHZ <9 ns) for repeatable measurement sequencing. Use Value: Enables sub-microsecond channel switching without bus glitches, preserving signal integrity across multiple analog front-end paths. |
| Industrial Control I/O Expansion | Legacy System Upgrade Interface |
|
Use Scenario: Multiplexing four pairs of digital I/O lines from remote field modules onto a central controller's parallel port. IC Role / Device Role / Timing Role: Bidirectional data path manager using 3-state outputs to isolate inactive modules and reduce backplane loading. Use Value: Supports hot-swap-safe I/O expansion with zero added propagation skew across all four channels, maintaining deterministic scan timing. |
Use Scenario: Replacing obsolete 74LS258 or 74S258 in aging avionics or telecom chassis requiring long-term component availability. IC Role / Device Role / Timing Role: Pin- and function-compatible upgrade offering improved speed (vs LS) and higher drive (vs S), with identical SOIC footprint. Use Value: Extends service life of legacy hardware without board rework, leveraging TI's continued production and RoHS-compliant packaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS258N | Slower propagation (15–25 ns), lower drive (8 mA IOL), same 16-pin PDIP package; TTL-compatible but not F-series speed grade. | Suitable only for low-frequency (<5 MHz) systems where timing margin is ample; not recommended for bus arbitration above 10 MHz. | Select if cost-sensitive and speed requirements are relaxed; verify timing closure with worst-case LS delays. |
| SN74ACT258D | CMOS technology, 5-V tolerant inputs, 24 mA drive, faster tPLH/tPHL (3.5 ns typ), wider VCC range (4.5–5.5 V), same SOIC-16 pinout. | Enables mixed-voltage interfacing and lower power consumption; requires checking input capacitance impact on driving source rise/fall times. | Prefer for new designs needing better noise immunity, lower ICC, or future-proofing beyond TTL logic families. |
Compared with SN74LS258N and SN74ACT258D, the SN74F258DG4 delivers optimal balance of proven TTL timing predictability, robust 24-mA bus drive, and SOIC manufacturability-making it ideal for sustaining production of existing 5-V bus architectures without redesign risk.
Availability
SN74F258DG4 is available at Aetrix Electronics and suitable for computer bus arbitration, industrial I/O expansion, test equipment signal routing, and legacy system upgrade applications requiring stable component supply and long-term obsolescence management.
Supply support for SN74F258DG4 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 solutions with broad industrial, automotive, and communications reach.
The SN74F258DG4 belongs to TI's 74F family of fast TTL logic devices, engineered specifically for high-speed bus interface and data routing in 5-V digital systems where timing precision and drive strength are critical.
FAQ
What is the function of the A/B pin on the SN74F258DG4?
The A/B pin on the SN74F258DG4 is a common select input controlling all four 2:1 multiplexers. When A/B is low, each Y output passes the corresponding A input (1A, 2A, 3A, 4A); when high, it passes the B input (1B, 2B, 3B, 4B). This unified control simplifies logic design for parallel data routing and eliminates need for four separate select lines in the SN74F258DG4 implementation.
Does the SN74F258DG4 support hot insertion or live bus connection?
The SN74F258DG4 is not rated for hot insertion. Its absolute maximum ratings specify output voltage limits (−0.5 V to 5.5 V) only when disabled or powered off, and no controlled slew rate or bus-fault protection is provided. For live bus applications, external series resistors or dedicated hot-swap controllers should be used alongside the SN74F258DG4 to prevent damage during insertion.
Can the SN74F258DG4 operate at 3.3 V?
No, the SN74F258DG4 requires a minimum supply voltage of 4.5 V and is specified only for 4.5 V to 5.5 V operation. At 3.3 V, VIH and VIL thresholds are not met, output drive collapses, and timing parameters become invalid. Use SN74LVC258 or SN74AHC258 instead for 3.3-V systems - the SN74F258DG4 is strictly a 5-V TTL device.
What does "DG4" signify in the SN74F258DG4 part number?
"DG4" is Texas Instruments' package and processing suffix: "D" denotes the 16-pin SOIC package, "G" indicates green (RoHS-compliant) finish, and "4" specifies tube packaging (40 units per tube). This distinguishes SN74F258DG4 from PDIP (N) or tape-and-reel (DR) variants, all sharing identical electrical functionality and pinout within the D package.
Is the SN74F258DG4 pin-compatible with the SN74F258D or SN74F258D.A?
Yes, SN74F258DG4 is fully pin-compatible and functionally identical to SN74F258D and SN74F258D.A - all use the same SOIC-16 (D) package, share identical pinout, electrical specs, and timing characteristics, differing only in packaging method (tube vs. tape-and-reel) and marking. Board designs using SN74F258D can directly substitute SN74F258DG4 without layout changes.
SN74F258DG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74F
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Type:
- Multiplexer
- Circuit:
- 4 x 2:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 3mA, 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
SN74F258DG4 FAQ
1.How can I place an order for SN74F258DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74F258DG4 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 SN74F258DG4 reliable?
The price and inventory of SN74F258DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F258DG4 is usually 5 days.
3.What payment methods are accepted for SN74F258DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F258DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74F258DG4?
SN74F258DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74F258DG4 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 SN74F258DG4?
For technical support, including SN74F258DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F258DG4 requirements.
6.How does Aetrix verify that SN74F258DG4 is sourced from the original manufacturer or authorized distributors?
All SN74F258DG4 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 SN74F258DG4 meets industry standards.
7.What is the process for return or replacement of SN74F258DG4?
All SN74F258DG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74F258DG4, 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 SN74F258DG4 part is unused and in its original packaging.
Return procedure for SN74F258DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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