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Texas Instruments SN74HC158NE4
- Part No.:
- SN74HC158NE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74HC158NE4.pdf
- Description:
- QUADRUPLE 2-LINE TO 1-LINE DATA
- Quantity:
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Product details
Overview
SN74HC158NE4 from Texas Instruments is a 4-bit dual-input inverting data selector/multiplexer in 16-pin PDIP package, operating across 2 V–6 V supply, with 11 ns typical propagation delay at 6 V, ±6-mA output drive, and compatibility with LSTTL loads. It routes inverted 4-bit words from one of two input sources to four outputs under active-low strobe control, used in digital logic routing and address/data path selection.
For engineers reviewing the SN74HC158NE4 datasheet, SN74HC158NE4 pinout, SN74HC158NE4 application, or SN74HC158NE4 equivalent, this page delivers verified electrical specs, functional truth table alignment, package-confirmed pin roles, real-world use cases in bus multiplexing and logic-level translation, and validated alternative options for design continuity.
Technical Context
The SN74HC158NE4 implements positive-logic select control (A/B) with active-low enable (G), delivering inverted outputs (1Y–4Y) based on selected source (A or B). Its CMOS architecture ensures low static current (≤80 µA) and high noise immunity via defined VIH/VIL thresholds across 2–6 V operation.
Each output drives up to 15 LSTTL loads with rail-to-rail swing, supported by ±6-mA sink/source capability at 5 V and ≤0.33 V VOL at 6 mA load. Input transition time limits (400–1000 ns) ensure reliable timing margin for asynchronous switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing without level shifters |
| Propagation Delay (tpd) | 11 ns typical at VCC = 6 V, CL = 50 pF - enables ≥30 MHz toggle rates in synchronous logic paths |
| Output Drive Strength | ±6 mA at VCC = 5 V - directly interfaces legacy TTL loads without external buffers |
| Input Leakage Current | ≤1 µA max - prevents unintended logic state drift in high-impedance or floating-node designs |
| Quiescent ICC | 80 µA max - reduces standby power in battery-backed or energy-sensitive control modules |
| Logic Function | Inverting 4-bit 2:1 multiplexer - outputs are complemented versions of selected inputs (A or B) |
| Strobe Polarity | Active-low G input - enables synchronous gating with common enable signals in bus arbitration |
Pinout & Package
SN74HC158NE4 uses a 16-pin plastic dual in-line package (PDIP-N), 19.1 mm × 6.6 mm body, 2.54 mm lead pitch, through-hole mounting. Pin 1 index located at top-left corner with notch orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Strobe Enable Input | Active-low global enable; all outputs forced high when G = H (per function table) |
| 2 (A/B) | Source Select Control | High selects input B; low selects input A - determines which 4-bit word is routed |
| 3 (1A) | Data Input A, Bit 1 | First bit of source-A word; inverted and routed to pin 14 (1Y) when A/B = L and G = L |
| 4 (1B) | Data Input B, Bit 1 | First bit of source-B word; inverted and routed to pin 14 (1Y) when A/B = H and G = L |
| 5 (2A) | Data Input A, Bit 2 | Second bit of source-A word; inverted and routed to pin 13 (2Y) |
| 6 (2B) | Data Input B, Bit 2 | Second bit of source-B word; inverted and routed to pin 13 (2Y) |
| 7 (3A) | Data Input A, Bit 3 | Third bit of source-A word; inverted and routed to pin 11 (3Y) |
| 8 (3B) | Data Input B, Bit 3 | Third bit of source-B word; inverted and routed to pin 11 (3Y) |
| 9 (4A) | Data Input A, Bit 4 | Fourth bit of source-A word; inverted and routed to pin 10 (4Y) |
| 10 (4B) | Data Input B, Bit 4 | Fourth bit of source-B word; inverted and routed to pin 10 (4Y) |
| 11 (3Y) | Inverted Output, Bit 3 | Complemented version of selected 3rd input (3A or 3B); open-collector compatible with pull-up |
| 12 (4Y) | Inverted Output, Bit 4 | Complemented version of selected 4th input (4A or 4B); TTL/CMOS fanout compliant |
| 13 (2Y) | Inverted Output, Bit 2 | Complemented version of selected 2nd input (2A or 2B); meets LSTTL load spec (15 units) |
| 14 (1Y) | Inverted Output, Bit 1 | Complemented version of selected 1st input (1A or 1B); primary output for LSB routing |
| 15 (VCC) | Positive Supply | 2–6 V DC supply connection; decoupling capacitor required within 10 mm for noise suppression |
| 16 (GND) | Ground Reference | Return path for all I/O and supply currents; must be low-impedance plane for signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply voltage range | 2 V to 6 V operation enables direct interface with 3.3 V microcontrollers and 5 V legacy peripherals |
| Inverting multiplexer logic | Outputs always inverted - eliminates need for external inverters in complement-based decoding paths |
| LSTTL load compatibility | Drives up to 15 LSTTL inputs per output - simplifies interconnection in mixed-technology systems |
| Low quiescent power | 80 µA max ICC allows use in always-on control logic without thermal or battery-life penalty |
| Controlled output transition | 10–15 ns output rise/fall times (CL = 50 pF) reduce EMI and crosstalk in dense PCB layouts |
Applications
| Address Bus Multiplexing | Data Path Selection |
|---|---|
|
Use Scenario: Selecting between two memory banks or peripheral address spaces in an 8-bit microcontroller system. IC Role / Device Role / Timing Role: SN74HC158NE4 acts as a 4-bit address line selector, enabling bank-switched memory access with cycle-synchronous strobe control. Use Value: Reduces address decoder complexity by consolidating two 4-bit source buses into one 4-bit output bus using only one IC and no additional glue logic. |
Use Scenario: Routing sensor data or configuration bits between two ADC channels or I/O expanders sharing a common data bus. IC Role / Device Role / Timing Role: SN74HC158NE4 serves as a bidirectional data path switch, controlled by a mode register bit to isolate concurrent data streams. Use Value: Prevents bus contention while maintaining deterministic latency (11 ns max) for time-critical sampling sequences. |
| Logic-Level Translation | Test Mode Insertion |
|
Use Scenario: Interfacing 3.3 V FPGA I/O with 5 V industrial sensors requiring inverted handshake signals. IC Role / Device Role / Timing Role: SN74HC158NE4 provides level-tolerant inversion and drive strength matching between voltage domains. Use Value: Eliminates discrete level shifters and inverters, reducing BOM count and layout area in mixed-voltage test fixtures. |
Use Scenario: Injecting diagnostic patterns during production test by overriding normal data flow with known test vectors. IC Role / Device Role / Timing Role: SN74HC158NE4 functions as a test-mode multiplexer, inserting factory-generated signals via dedicated B-source inputs. Use Value: Enables non-invasive test insertion without modifying main signal path; G input synchronizes test activation with system clock edges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit inverting multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC157N | Non-inverting 4-bit 2:1 multiplexer; identical pinout and supply specs but outputs follow input polarity | Used where signal inversion is undesirable (e.g., direct data forwarding without complement) | Select SN74HC157N when system logic requires true (non-inverted) output mapping |
| CD74HC158E | Same logic function and pinout; manufactured by TI under legacy CD prefix, identical AC/DC specs and PDIP packaging | No functional difference; differs only in part numbering convention and RoHS compliance timeline | CD74HC158E is a drop-in replacement with identical form, fit, and function - suitable for legacy design refresh |
Compared with SN74HC158NE4, SN74HC157N provides non-inverted outputs for transparent data routing, while CD74HC158E offers identical inverted multiplexing with equivalent timing and drive - both preserve PCB layout and firmware compatibility in upgrade or sourcing-flex scenarios.
Availability
SN74HC158NE4 is available at Aetrix Electronics and suitable for industrial control panels, legacy instrumentation upgrades, and embedded test equipment requiring stable component supply over extended production lifecycles.
Supply support for SN74HC158NE4 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 specializing in analog, embedded processing, and logic solutions, with decades of leadership in industry-standard logic families.
The SN74HC158NE4 belongs to TI's 74HC high-speed CMOS logic series, designed for low-power, pin-compatible replacements of TTL devices in industrial, automotive, and communications infrastructure.
FAQ
What logic family does SN74HC158NE4 belong to, and how does it differ from standard TTL?
SN74HC158NE4 belongs to the 74HC (High-Speed CMOS) logic family. Unlike standard TTL, it operates from 2 V to 6 V, draws significantly less quiescent current (≤80 µA vs. ~10 mA for LS-TTL), and provides higher noise immunity due to CMOS input thresholds. It maintains TTL-compatible output drive (±6 mA) and fanout (15 LSTTL loads), making it a drop-in power-efficient upgrade for legacy 74LS158 designs.
Does SN74HC158NE4 require external pull-up resistors on its outputs?
No, SN74HC158NE4 features totem-pole (push-pull) outputs, not open-drain. Its 1Y–4Y pins actively drive both high and low states, eliminating the need for external pull-ups. However, proper VCC and GND decoupling (e.g., 0.1 µF ceramic near pin 15/16) is essential to maintain output integrity under switching load.
Can SN74HC158NE4 operate reliably at 3.3 V supply voltage?
Yes, SN74HC158NE4 is fully specified for operation at 3.3 V. Its VIH is 2.0 V min and VIL is 1.0 V max at VCC = 3.3 V, ensuring robust noise margins with 3.3 V CMOS and microcontroller I/O. Propagation delay increases to ~18 ns (typical), remaining well within most 20 MHz digital system timing budgets.
What is the function of the G (strobe) input on SN74HC158NE4?
The G input is an active-low enable that gates all four outputs. When G = HIGH, all outputs (1Y–4Y) are forced HIGH regardless of A/B or data inputs - effectively disabling the multiplexer. When G = LOW, the device passes the selected (A or B) 4-bit word with inversion. This allows synchronized bus isolation in multi-device systems.
Is SN74HC158NE4 pin-compatible with other 74HC-series multiplexers like SN74HC153 or SN74HC157?
SN74HC158NE4 shares the same 16-pin PDIP footprint with SN74HC157N and SN74HC153N, but pin functions differ. SN74HC157N has non-inverting outputs and identical pinout; SN74HC153N is a dual 2:1 multiplexer with different input/output mapping. Direct substitution requires logic verification - only SN74HC157N qualifies as a pin-and-function match except for inversion polarity.
SN74HC158NE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Data Selector/Multiplexer
- Circuit:
- 4 x 2:1
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
SN74HC158NE4 FAQ
1.How can I place an order for SN74HC158NE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC158NE4 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 SN74HC158NE4 reliable?
The price and inventory of SN74HC158NE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC158NE4 is usually 5 days.
3.What payment methods are accepted for SN74HC158NE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC158NE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC158NE4?
SN74HC158NE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC158NE4 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 SN74HC158NE4?
For technical support, including SN74HC158NE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC158NE4 requirements.
6.How does Aetrix verify that SN74HC158NE4 is sourced from the original manufacturer or authorized distributors?
All SN74HC158NE4 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 SN74HC158NE4 meets industry standards.
7.What is the process for return or replacement of SN74HC158NE4?
All SN74HC158NE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC158NE4, 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 SN74HC158NE4 part is unused and in its original packaging.
Return procedure for SN74HC158NE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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