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Texas Instruments SN74ALS153N
- Part No.:
- SN74ALS153N
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ALS153N.pdf
- Description:
- IC MULTIPLEXER 2 X 4:1 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:390
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Product details
Overview
SN74ALS153N from Texas Instruments is a dual 1-of-4 data selector/multiplexer IC in a 16-pin plastic DIP (PDIP) package, operating from 0°C to 70°C with 5 V supply, 24 mA low-level output drive, and propagation delays as low as 3 ns for data-to-output paths-used in digital logic routing, address decoding, and parallel-to-serial conversion in legacy industrial control systems.
For engineers reviewing the SN74ALS153N datasheet, SN74ALS153N pinout, SN74ALS153N application, or SN74ALS153N equivalent, key selection criteria include its TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V), dual independent strobe (G) inputs per section, common select lines (A/B), and guaranteed 12 mA minimum sink current at 0.4 V output voltage under commercial temperature conditions.
Technical Context
This device implements two independent 4:1 multiplexers using AND-OR-inverter logic with full binary decoding. Each section has dedicated strobe (1G/2G) inputs enabling cascading without external gating, while select inputs A and B are shared between sections to minimize control bus loading.
It uses bipolar ALS (Advanced Low-Power Schottky) technology, delivering higher speed than standard LS logic (e.g., tPHL/tPLH ≤ 21 ns for data→Y at 50 pF load) with lower power consumption than AS variants-achieving 7.5–14 mA ICC across the 4.5–5.5 V supply range at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ALS (Advanced Low-Power Schottky) – balances speed and power vs. LS/AS families |
| Supply Voltage Range | 4.5 V to 5.5 V – compatible with standard 5 V TTL systems; absolute max 7 V |
| Output Drive (IOL) | 12 mA min @ VOL = 0.4 V – sufficient to drive multiple TTL inputs or small LEDs directly |
| Propagation Delay (Data→Y) | 3–10 ns typical – enables reliable operation up to ~50 MHz in short-path logic designs |
| Input Thresholds | VIH = 2 V, VIL = 0.8 V – ensures noise margin compatibility with standard TTL outputs |
| Operating Temperature | 0°C to 70°C – commercial-grade rating suitable for office, lab, and non-military embedded systems |
| Package Type | PDIP-16 (N) – through-hole mounting with 0.3″ width, 0.1″ lead pitch, RoHS-compliant NiPdAu finish |
Pinout & Package
SN74ALS153N is housed in a 16-pin plastic dual in-line package (PDIP-N) with 0.3″ body width and 0.1″ lead spacing, designed for through-hole PCB assembly and manual prototyping. Pin 1 is marked by a notch or dot on the package top edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1G | Strobe input, Section 1 | Active-low enable: Y1 = high-impedance when G = H; allows section-level gating and cascading |
| 1C0–1C3 | Data inputs, Section 1 | Four independent data sources selected by A/B; no internal pull-ups or level-shifting |
| 1Y | Output, Section 1 | Active-high totem-pole output; drives loads directly without external pull-up |
| A, B | Common select lines | Binary address inputs shared by both sections; reduce control signal count in multi-channel systems |
| 2C0–2C3 | Data inputs, Section 2 | Second set of four inputs, fully independent from Section 1 except for A/B and VCC/GND |
| 2Y | Output, Section 2 | Independent totem-pole output; supports simultaneous dual-channel selection |
| 2G | Strobe input, Section 2 | Independent active-low enable for Section 2; enables synchronized or staggered channel activation |
| VCC | Power supply | +5 V nominal; decoupling capacitor required near pin 16 for stable switching performance |
| GND | Ground reference | Signal and power return; must be low-impedance connection to minimize ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4:1 multiplexers | Enables two parallel data-routing paths in one IC-reducing board space vs. discrete 74LS153 implementations |
| Separate strobe (G) inputs per section | Allows selective enabling/disabling of each multiplexer without affecting the other-critical for time-multiplexed I/O expansion |
| Common select lines (A/B) | Eliminates need for duplicated address decoding logic-simplifies control firmware and reduces gate count in FPGA/CPLD glue logic |
| ALS logic family performance | Delivers 2× speed improvement over LS (e.g., 10 ns vs. 21 ns data→Y delay) with only ~1.5× power increase-optimized for throughput-critical legacy systems |
| TTL-compatible input/output levels | Interoperates directly with 74LS, 74F, and microcontroller GPIO without level shifters-ensures drop-in replacement in existing 5 V designs |
Applications
| Address Decoding | Parallel-to-Serial Conversion |
|---|---|
Use Scenario: Selecting one of four memory-mapped peripheral registers in an 8-bit microprocessor system (e.g., Z80 or 8085). IC Role / Device Role / Timing Role: Dual-section multiplexer routes address-decoded chip-select signals based on A/B bits, with strobes synchronized to RD/WR control. Use Value: Reduces external decoding logic by 50% versus single-mux solutions-enabling compact 4-peripheral I/O expansion with minimal gate count. | Use Scenario: Converting 4-bit parallel status data from sensors into serial stream for UART transmission in industrial monitoring hardware. IC Role / Device Role / Timing Role: Acts as data path selector clocked by shift register control signals; A/B select bit position, strobe gates valid sample window. Use Value: Eliminates need for dedicated shift register IC-uses existing control timing to serialize data with deterministic 3–10 ns propagation latency. |
| Logic Signal Routing | Test Equipment Multiplexing |
Use Scenario: Dynamically reconfiguring signal paths in automated test fixtures where multiple DUT inputs must connect to shared measurement circuitry. IC Role / Device Role / Timing Role: Provides bidirectional (input/output) signal routing under microcontroller command; strobes isolate unused sections during reconfiguration. Use Value: Enables 4:1 input selection + 1:4 output distribution in same footprint-reducing relay count and mechanical wear in production test systems. | Use Scenario: Scanning four analog sensor channels into a single ADC input in benchtop instrumentation with manual or software-controlled channel selection. IC Role / Device Role / Timing Role: Routes buffered analog front-end outputs (after op-amp conditioning) to ADC input; strobes prevent crosstalk during switching transients. Use Value: Maintains <10 ns channel-switching skew-preserving timing integrity for synchronized multi-channel sampling at ≤1 MSPS rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 4:1 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS153N | Slower (tPLH/tPHL ≤ 25 ns), higher ICC (19 mA), same pinout and logic function | Acceptable where speed <20 MHz and power budget allows +30% supply current | Preferred for cost-sensitive, low-speed legacy replacements where ALS speed is unnecessary |
| SN74AS153N | Faster (tPLH/tPHL ≤ 12.5 ns), higher drive (IOL = 48 mA), same pinout but different VIH/VIL thresholds | Required for >30 MHz operation or driving heavy capacitive loads (>100 pF) | Chosen when propagation delay or fanout exceeds SN74ALS153N capability-requires verification of input compatibility |
Compared with SN74LS153N and SN74AS153N, the SN74ALS153N delivers optimal balance of speed (≤21 ns), power (7.5–14 mA), and noise immunity (0.8 V VIL) for mid-speed 5 V digital systems-making it the default choice where LS is too slow and AS is over-specified.
Availability
SN74ALS153N is available at Aetrix Electronics and suitable for industrial control panels, legacy test equipment, and educational electronics kits requiring stable component supply, long-term obsolescence management, and through-hole assembly support.
Supply support for SN74ALS153N 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 ICs with broad industrial, automotive, and consumer design support.
The SN74ALS153N belongs to TI's legacy 74ALS logic family, engineered for reliable 5 V TTL-system interoperability with improved speed-power trade-offs over earlier LS series-targeting retrofits, maintenance spares, and education-focused digital design.
FAQ
What is the maximum clock frequency supported by SN74ALS153N in a data-selection application?
The SN74ALS153N does not operate on a clock signal-it is combinatorial logic with propagation delay as the limiting factor. With worst-case data-to-output delay of 10 ns (tPLH/tPHL) at 50 pF load, the maximum reliable toggle rate for a closed-loop selection path is approximately 50 MHz. This assumes clean edges, proper decoupling, and minimal trace capacitance; actual system frequency depends on total path delay including upstream drivers and downstream loads. The SN74ALS153N specification sheet confirms this via switching characteristics tables under recommended operating conditions.
Can SN74ALS153N be used as a 1-of-8 multiplexer by cascading two sections?
No-SN74ALS153N cannot natively implement a 1-of-8 function via internal cascading because both sections share the same A/B select lines and lack a third select bit. To achieve 1-of-8 behavior, an external third select line must gate the outputs of both 1Y and 2Y using additional logic (e.g., AND gates) or a second SN74ALS153N stage. The datasheet explicitly states strobe (G) inputs are provided "for cascading (n lines to n lines)", meaning parallel expansion-not hierarchical 4+4=8 selection. The SN74ALS153N pinout and function table confirm only two select inputs exist.
Is SN74ALS153N compatible with 3.3 V logic systems?
No-SN74ALS153N is strictly a 5 V TTL-family device. Its absolute maximum supply voltage is 7 V, but recommended operation is 4.5–5.5 V. Input thresholds (VIH = 2 V, VIL = 0.8 V) are defined for 5 V rails, and 3.3 V outputs may not reliably meet VIH, risking logic misreads. Additionally, VCC must be 5 V to guarantee output VOH ≥ 2.4 V and VOL ≤ 0.4 V per datasheet specs. Using SN74ALS153N with 3.3 V supplies violates recommended operating conditions and risks functional failure. For 3.3 V systems, consider modern alternatives like SN74LVC153.
Does SN74ALS153N have 3-state outputs?
No-SN74ALS153N features standard totem-pole (push-pull) outputs, not 3-state. Its outputs actively drive high or low; they do not enter a high-impedance state. The datasheet distinguishes this clearly: "′ALS253 and SN74AS253A Are 3-State Versions of These Parts", confirming SN74ALS153N lacks output enable/disable capability. Strobe (G) inputs disable the output *function* (forcing Y = high-impedance is incorrect-Y = LOW when G = HIGH per function table), but the output stage remains active. True 3-state behavior requires explicit OE pins, absent in SN74ALS153N.
What is the thermal resistance (θJA) of SN74ALS153N in the PDIP package?
The SN74ALS153N datasheet (SDAS206A) does not specify θJA for the PDIP-16 (N) package. Texas Instruments' general packaging guidelines indicate typical θJA for 16-pin PDIP is ~65°C/W under JEDEC-standard 1s2p board conditions, but this value is not validated or published for SN74ALS153N specifically. Power dissipation must be calculated from ICC (7.5–14 mA at 5 V = 37.5–70 mW) and ambient temperature limits (0–70°C). No derating curve or thermal pad recommendations are provided-thermal design relies on natural convection and board copper area. For precise thermal modeling, users should consult TI's generic PDIP thermal data or perform empirical testing.
SN74ALS153N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
SN74ALS153N FAQ
1.How can I place an order for SN74ALS153N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS153N 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 SN74ALS153N reliable?
The price and inventory of SN74ALS153N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS153N is usually 5 days.
3.What payment methods are accepted for SN74ALS153N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS153N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS153N?
SN74ALS153N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS153N 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 SN74ALS153N?
For technical support, including SN74ALS153N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS153N requirements.
6.How does Aetrix verify that SN74ALS153N is sourced from the original manufacturer or authorized distributors?
All SN74ALS153N 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 SN74ALS153N meets industry standards.
7.What is the process for return or replacement of SN74ALS153N?
All SN74ALS153N units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS153N, 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 SN74ALS153N part is unused and in its original packaging.
Return procedure for SN74ALS153N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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