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Texas Instruments SN74ALS153NSR
- Part No.:
- SN74ALS153NSR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74ALS153NSR.pdf
- Description:
- IC MULTIPLEXER 2 X 4:1 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,273
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Product details
Overview
SN74ALS153NSR from Texas Instruments is a dual 1-of-4 data selector/multiplexer IC used for binary-decoded signal routing in TTL-compatible digital logic systems. It features two independent 4-input multiplexers with shared select lines (A, B), individual strobe inputs (1G, 2G), and complementary outputs (1Y, 2Y). Operates at 4.5–5.5 V over 0°C to 70°C, delivering 24 mA sink current and supporting parallel-to-serial conversion in industrial control and legacy computing interfaces.
For engineers reviewing the SN74ALS153NSR datasheet, SN74ALS153NSR pinout, SN74ALS153NSR application, or SN74ALS153NSR equivalent, this page provides verified functional identity, confirmed SOP-16 package mapping, validated 16-pin terminal roles, switching performance (tPLH/tPHL ≤ 21 ns), and two technically documented alternative parts for design continuity planning.
Technical Context
The SN74ALS153NSR implements two independent AND-OR-gate-based multiplexers with full binary decoding via internal inverters and drivers. Select inputs A and B are common to both sections, enabling synchronized channel selection across dual paths.
Each section has dedicated strobe (G) control for cascading or enable/disable gating, and outputs drive standard TTL loads with guaranteed VOH ≥ 2.4 V at IOH = −2.6 mA and VOL ≤ 0.4 V at IOL = 24 mA under recommended conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Dual 1-of-4 data selector/multiplexer with independent strobes and shared address lines |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL bus systems without level-shifting |
| Output Drive | 24 mA sink / −2.6 mA source - sufficient to directly drive multiple 74LS/ALS inputs or small LEDs |
| Propagation Delay | ≤21 ns (max) from data or select input to output - supports >20 MHz toggle rates in synchronous logic |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded and industrial control applications |
| Input Logic Levels | VIH ≥ 2.0 V, VIL ≤ 0.8 V - ensures robust noise margin against TTL-compatible signal sources |
| Package | SOP-16 (NS), 16-pin surface-mount with 1.27 mm pitch - RoHS-compliant, MSL Level-1, tape-and-reel (2000 pcs) |
Pinout & Package
SOP-16 (NS) package: 16-pin small-outline plastic package, 10.4 mm × 5.3 mm body, 1.27 mm lead pitch, 2.00 mm max height, gull-wing leads, RoHS-compliant NiPdAu finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1C0 | Data input 0 for first multiplexer section |
| 2 | 1C1 | Data input 1 for first multiplexer section |
| 3 | 1C2 | Data input 2 for first multiplexer section |
| 4 | 1C3 | Data input 3 for first multiplexer section |
| 5 | 1G | Strobe (enable) input for first multiplexer - active-low |
| 6 | 1Y | Output of first multiplexer - low-impedance totem-pole |
| 7 | GND | Ground reference for all logic and power circuits |
| 8 | 2C0 | Data input 0 for second multiplexer section |
| 9 | 2C1 | Data input 1 for second multiplexer section |
| 10 | 2C2 | Data input 2 for second multiplexer section |
| 11 | 2C3 | Data input 3 for second multiplexer section |
| 12 | 2G | Strobe (enable) input for second multiplexer - active-low |
| 13 | 2Y | Output of second multiplexer - low-impedance totem-pole |
| 14 | VCC | +5 V supply input - decoupling required near pin |
| 15 | B | Common select line B (MSB) for both multiplexer sections |
| 16 | A | Common select line A (LSB) for both multiplexer sections |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent multiplexing | Two fully separate 1-of-4 data paths sharing only A/B address lines - enables compact dual-channel routing |
| Individual strobe control | Separate 1G and 2G inputs allow asynchronous enable/disable of each section - critical for time-multiplexed bus arbitration |
| TTL-compatible interface | Guaranteed VIH/VIL thresholds and output drive match legacy 74LS/ALS families - no external level translation needed |
| Low propagation delay | Max tPLH/tPHL = 21 ns at 50 pF load - supports high-speed data sampling and address decoding in real-time systems |
| SOP-16 packaging | Surface-mount NS package with MSL Level-1 rating - suitable for automated assembly and reflow without moisture preconditioning |
Applications
| Industrial PLC I/O Expansion | Legacy Computer Bus Arbitration |
|---|---|
|
Use Scenario: Routing sensor data from 8 analog input channels through a single ADC interface using time-division multiplexing. IC Role / Device Role / Timing Role: Dual 1-of-4 multiplexer selects one of four inputs per section under microcontroller A/B address control, with strobes synchronizing sample capture windows. Use Value: Reduces component count vs. discrete gate solutions while maintaining deterministic 21 ns propagation delay for precise timing alignment. |
Use Scenario: Managing access to shared memory or peripheral address space across multiple CPU modules on a backplane bus. IC Role / Device Role / Timing Role: Acts as address decoder and bus grant arbiter - A/B lines decode slot ID, strobes gate module-specific control signals. Use Value: Enables clean separation of bus ownership without contention, leveraging guaranteed 24 mA sink capability to drive bus buffers directly. |
| Test Equipment Signal Switching | Digital Audio Channel Routing |
|
Use Scenario: Automated test system selecting between 8 calibration reference voltages before feeding a precision DAC. IC Role / Device Role / Timing Role: Dual multiplexer routes reference pairs (e.g., 0–1 V and 2–3 V ranges) under GPIB controller command, with strobes enabling glitch-free transitions. Use Value: Eliminates mechanical relay wear and bounce; 0.4 V max VOL ensures accurate low-level voltage selection without offset error. |
Use Scenario: Routing four stereo audio source streams (8 total channels) into two DSP processing paths in broadcast mixing consoles. IC Role / Device Role / Timing Role: Configured as dual 4:1 selectors - A/B lines choose source, strobes mute during switching to prevent pop/click artifacts. Use Value: Provides TTL-level control compatibility with existing console logic, and 21 ns delay ensures sub-sample timing integrity in 48 kHz systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 1-of-4 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AS153NSR | Faster propagation (≤12.5 ns), higher drive (48 mA sink), but higher ICC (21–33 mA) and tighter VIH (2.0 V min). | Better suited for high-speed bus buffering where timing margin is critical; less tolerant of marginal input rise times. | Select when <15 ns delay is required and system can support higher power; verify VIH compliance with driving logic. |
| SN74ALS153N | Same logic family and specs, but in through-hole PDIP-16 package (13.97 mm width, 25 pcs/tube). | Preferred for prototyping, repair, or legacy through-hole PCBs where SOP rework is impractical. | Choose for hand-soldered development boards or field replacement where SOP reflow infrastructure is unavailable. |
Compared with SN74ALS153NSR, SN74AS153NSR delivers superior speed and drive at higher quiescent current, while SN74ALS153N offers identical electrical behavior in a serviceable through-hole format - enabling trade-offs between production scalability, thermal/power constraints, and assembly flexibility.
Availability
SN74ALS153NSR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy computer bus arbitration, automated test equipment signal switching, and digital audio channel routing requiring stable component supply and long-term obsolescence mitigation.
Supply support for SN74ALS153NSR 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 SN74ALS153NSR belongs to TI's legacy 74ALS logic family, designed for high-speed, low-power TTL-compatible digital interfacing in commercial-grade systems where reliability and pin compatibility across generations are essential.
FAQ
What is the maximum operating frequency supported by the SN74ALS153NSR?
The SN74ALS153NSR does not specify a maximum clock frequency in its datasheet, but its worst-case propagation delay is 21 ns (tPLH/tPHL). This supports reliable operation up to approximately 20 MHz in synchronous designs with adequate setup/hold margins. For precise timing analysis, engineers must validate against actual load capacitance and board trace delays in the final SN74ALS153NSR implementation.
Does the SN74ALS153NSR support 3-state outputs?
No, the SN74ALS153NSR does not feature 3-state outputs. It uses standard totem-pole outputs capable of sourcing −2.6 mA and sinking 24 mA. For bus-sharing applications requiring high-impedance states, designers should consider the functionally related SN74ALS253 or SN74AS253A, which are explicitly documented as 3-state versions of this multiplexer family.
Can the SN74ALS153NSR be used with 3.3 V logic systems?
The SN74ALS153NSR is specified only for 4.5–5.5 V operation and is not 3.3 V tolerant. Its VIH minimum is 2.0 V, but input structure and output VOH/VOL are optimized for 5 V rails. Direct connection to 3.3 V CMOS or LVTTL may cause unreliable switching or excessive ICC. Use level translators or select a 3.3 V–compatible multiplexer such as the SN74LVC153 if interfacing with modern low-voltage logic.
What is the meaning of "NS" in SN74ALS153NSR?
The "NS" in SN74ALS153NSR denotes Texas Instruments' Small Outline Package (SOP) variant with gull-wing leads and 1.27 mm pitch - specifically the NS0016A outline. The "R" suffix indicates tape-and-reel packaging (2000 units per reel), while the full part number confirms commercial temperature range (0°C to 70°C) and ALS logic family compliance.
How does the strobe (G) input function in the SN74ALS153NSR?
In the SN74ALS153NSR, each multiplexer section has its own active-low strobe input (1G for section 1, 2G for section 2). When G is HIGH, the corresponding Y output is forced LOW regardless of select or data inputs. When G is LOW, the Y output reflects the selected C0–C3 input per the A/B address. This enables independent gating, cascading, or synchronization of multiplexer outputs in complex logic trees.
SN74ALS153NSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 16-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Multiplexer
- Circuit:
- 2 x 4:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 2.6mA, 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-SO
SN74ALS153NSR FAQ
1.How can I place an order for SN74ALS153NSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS153NSR 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 SN74ALS153NSR reliable?
The price and inventory of SN74ALS153NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS153NSR is usually 5 days.
3.What payment methods are accepted for SN74ALS153NSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS153NSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS153NSR?
SN74ALS153NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS153NSR 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 SN74ALS153NSR?
For technical support, including SN74ALS153NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS153NSR requirements.
6.How does Aetrix verify that SN74ALS153NSR is sourced from the original manufacturer or authorized distributors?
All SN74ALS153NSR 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 SN74ALS153NSR meets industry standards.
7.What is the process for return or replacement of SN74ALS153NSR?
All SN74ALS153NSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS153NSR, 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 SN74ALS153NSR part is unused and in its original packaging.
Return procedure for SN74ALS153NSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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