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Texas Instruments SN74F258DR
- Part No.:
- SN74F258DR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74F258DR.pdf
- Description:
- IC MULTIPLEXER 4 X 2:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,683
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Product details
Overview
SN74F258DR from Texas Instruments is a quadruple 2-line-to-1-line data selector/multiplexer with 3-state outputs, designed for bus-organized systems requiring signal routing from four 2-bit sources to four independent output lines. It operates at 4.5–5.5 V, supports 0°C to 70°C ambient, and delivers tPLH/tPHL ≤ 6 ns (data-to-output) and ≤ 9.5 ns (select-to-output) at 5 V with 50 pF load.
For engineers reviewing the SN74F258DR datasheet, SN74F258DR pinout, SN74F258DR application, or SN74F258DR equivalent, this page provides verified functional identity, validated SOIC-16 pin mapping, confirmed 3-state bus interface capability, and direct alternatives for legacy TTL multiplexer replacement in industrial control and instrumentation designs.
Technical Context
The SN74F258DR implements four independent 2:1 multiplexers sharing a common A/B select line and a single 3-state output-enable (OE) input. Each channel routes either input A or B to its Y output based on the logic level of A/B, while OE controls high-impedance state across all four outputs simultaneously.
It uses standard F-series TTL circuitry with guaranteed IOL = 24 mA per output (low), IOH = −3 mA (high), and ICCZ = 11.3–17 mA in 3-state mode. Input thresholds are VIH ≥ 2 V and VIL ≤ 0.8 V, ensuring compatibility with 5-V TTL logic families and robust noise margin in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across standard 5-V rail tolerances without regulation overhead. |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade industrial and embedded control applications. |
| Propagation Delay (tPLH/tPHL) | ≤6 ns (data path), ≤9.5 ns (A/B path) - enables synchronization in sub-100-MHz digital timing domains. |
| Output Drive (IOL/IOH) | 24 mA sink / −3 mA source - sufficient to drive multiple TTL inputs or terminate short PCB traces directly. |
| 3-State Leakage (IOZL/IOZH) | ±50 μA at 5.5 V - minimizes bus contention current when outputs are disabled in shared-data systems. |
| Input Clamp Current | −18 mA - protects against transient overvoltage events up to −1.2 V on inputs without external diodes. |
Pinout & Package
SN74F258DR is supplied in a 16-pin SOIC (D) package with 1.27 mm pitch, 10.3 mm × 5.3 mm body, and RoHS-compliant NiPdAu lead finish. Pin numbering follows standard D-package top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1A | Data input A for channel 1 - connects to first source bit in parallel 4-bit data stream. |
| 2 | 1B | Data input B for channel 1 - selects alternate source for same output line under A/B control. |
| 3 | 1Y | 3-state output for channel 1 - drives bus segment only when OE = L and A/B selects active input. |
| 4 | 2A | Data input A for channel 2 - matches 1A function for second bit lane. |
| 5 | 2B | Data input B for channel 2 - pairs with 2A for dual-source selection on bit 2. |
| 6 | 2Y | 3-state output for channel 2 - electrically isolated from other Y pins until enabled. |
| 7 | 3A | Data input A for channel 3 - maintains consistent 2:1 routing structure across all four channels. |
| 8 | GND | Ground reference - required return path for all internal logic and output drivers. |
| 9 | 3B | Data input B for channel 3 - shares A/B select line with all channels for synchronized switching. |
| 10 | 3Y | 3-state output for channel 3 - contributes to 4-bit wide multiplexed bus output. |
| 11 | 4A | Data input A for channel 4 - completes full 4-bit data path routing capability. |
| 12 | 4B | Data input B for channel 4 - allows uniform source selection across entire word width. |
| 13 | 4Y | 3-state output for channel 4 - final bit of multiplexed output group, compatible with standard data buses. |
| 14 | VCC | Positive supply - powers all internal gates and output buffers at nominal 5 V. |
| 15 | OE | Output enable - active-low global control that places all Y outputs in high-impedance state simultaneously. |
| 16 | A/B | Common select line - determines whether A or B input is routed to each Y output across all four channels. |
Key Features
| Feature | Design Value |
|---|---|
| Quadruple 2:1 Multiplexing | Routes four independent 2-bit data streams using one shared A/B select and one OE line - reduces control logic overhead in bus arbitration. |
| True 3-State Outputs | IOZL/IOZH ≤ ±50 μA ensures minimal leakage into disabled bus segments - critical for multi-master system integrity. |
| TTL-Compatible Thresholds | VIH ≥ 2 V and VIL ≤ 0.8 V guarantee interoperability with legacy 74LS/74F logic without level-shifting. |
| High-Speed Propagation | tPLH/tPHL ≤ 6 ns on data path enables use in 100+ MHz clock domains with adequate setup/hold margins. |
| Robust Absolute Ratings | Withstands −1.2 V input clamping and 7 V supply transients - simplifies ESD protection design in industrial environments. |
Applications
| Industrial PLC Backplane Interface | Digital Test Equipment Signal Routing |
|---|---|
|
Use Scenario: Selecting between primary and backup sensor data streams on a programmable logic controller backplane. IC Role / Device Role / Timing Role: Data selector enabling real-time redundancy switching without CPU intervention. Use Value: Single SN74F258DR handles all four bits of a parallel sensor word, eliminating need for four discrete 2:1 mux ICs and reducing board space by 75%. |
Use Scenario: Routing stimulus signals from multiple pattern generators to a device-under-test in automated test equipment. IC Role / Device Role / Timing Role: High-speed signal path selector synchronizing with test clock edges. Use Value: 6 ns propagation delay ensures sub-cycle timing alignment across all four data lanes during high-frequency test vector execution. |
| Legacy Computer Bus Expansion | Embedded Instrumentation Data Mux |
|
Use Scenario: Arbitrating access to shared memory or I/O address space among multiple peripheral cards in an ISA-style expansion slot. IC Role / Device Role / Timing Role: Bus interface multiplexer isolating inactive peripherals via 3-state outputs. Use Value: 24 mA output drive supports fan-out to ≥10 standard TTL loads, maintaining signal integrity across long backplane traces. |
Use Scenario: Consolidating analog-to-digital converter outputs from four separate sensor channels onto a single microcontroller data bus. IC Role / Device Role / Timing Role: Parallel data concentrator enabling time-multiplexed sampling without software overhead. Use Value: Common A/B and OE control allows synchronized channel selection and bus release using only two GPIO pins from the host MCU. |
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 | Lower drive (IOL = 8 mA), slower speed (tPD ≈ 15 ns), same pinout and logic function. | Suitable for low-power, non-critical timing applications where fan-out < 5 is acceptable. | Choose SN74LS258N only if power budget is constrained and speed requirements are relaxed. |
| SN74ACT258D | CMOS-compatible inputs (VIH = 3.5 V), higher speed (tPD ≈ 4.5 ns), 3-state leakage < 10 μA. | Requires 3.3 V–5 V mixed-signal interfacing; not drop-in for pure TTL systems due to input threshold mismatch. | Prefer SN74ACT258D when upgrading to faster, lower-leakage performance and redesigning for CMOS-level compatibility. |
Compared with SN74LS258N and SN74ACT258D, the SN74F258DR delivers optimal balance of TTL compatibility, 24 mA drive strength, and 6 ns speed-making it the preferred choice for maintaining legacy system timing and loading behavior without layout changes.
Availability
SN74F258DR is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, digital test equipment signal routing, and legacy computer bus expansion requiring stable component supply across extended production lifecycles.
Supply support for SN74F258DR 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 for industrial, automotive, and communications markets.
The SN74F258DR belongs to TI's 74F family of fast TTL logic devices, engineered specifically for high-speed bus-oriented data routing in commercial-grade systems where reliability and timing predictability are essential.
FAQ
What is the operating voltage range for SN74F258DR?
The SN74F258DR operates over a supply voltage range of 4.5 V to 5.5 V, as specified in the recommended operating conditions. This range ensures compatibility with standard 5-V TTL power rails while accommodating typical regulator tolerances. Operation outside this range may cause unreliable switching or permanent damage, per absolute maximum ratings.
Does SN74F258DR support true 3-state outputs?
Yes, SN74F258DR features fully specified 3-state outputs controlled by the active-low OE pin. When OE is high, all four Y outputs enter high-impedance mode with leakage currents limited to ±50 μA at 5.5 V - meeting industry-standard bus isolation requirements for multi-driver systems.
What is the maximum output drive capability of SN74F258DR?
Each output of SN74F258DR can sink up to 24 mA (IOL) and source up to −3 mA (IOH) under recommended operating conditions. This drive strength supports fan-out to at least 10 standard TTL loads, making it suitable for direct connection to legacy bus structures without buffering.
Is SN74F258DR pin-compatible with SN74LS258N?
Yes, SN74F258DR and SN74LS258N share identical pinouts and logic functionality in both SOIC (D) and PDIP (N) packages. However, SN74F258DR offers higher speed (6 ns vs. 15 ns) and stronger output drive (24 mA vs. 8 mA), so substitution requires verification of timing margins and loading conditions.
What temperature range is SN74F258DR rated for?
SN74F258DR is characterized for operation from 0°C to 70°C - the commercial temperature grade. This rating aligns with standard industrial control and embedded instrumentation environments, and is distinct from the military-grade SN54F258 (−55°C to 125°C).
SN74F258DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74F
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
SN74F258DR FAQ
1.How can I place an order for SN74F258DR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74F258DR 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 SN74F258DR reliable?
The price and inventory of SN74F258DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F258DR is usually 5 days.
3.What payment methods are accepted for SN74F258DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F258DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74F258DR?
SN74F258DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74F258DR 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 SN74F258DR?
For technical support, including SN74F258DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F258DR requirements.
6.How does Aetrix verify that SN74F258DR is sourced from the original manufacturer or authorized distributors?
All SN74F258DR 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 SN74F258DR meets industry standards.
7.What is the process for return or replacement of SN74F258DR?
All SN74F258DR units undergo pre-shipment inspection (PSI). If there is an issue with SN74F258DR, 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 SN74F258DR part is unused and in its original packaging.
Return procedure for SN74F258DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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