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Texas Instruments SN74ALS35AN
- Part No.:
- SN74ALS35AN
- Manufacturer:
- Texas Instruments
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ALS35AN.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,626
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Product details
Overview
SN74ALS35AN from Texas Instruments is a 14-pin PDIP-packaged hex noninverting buffer with open-collector outputs, operating at 4.5–5.5 V supply, delivering 8 mA low-level output current and propagation delays as low as 2 ns (tPHL), used in wired-OR logic interfaces and level-shifting applications.
For engineers reviewing the SN74ALS35AN datasheet, SN74ALS35AN pinout, SN74ALS35AN application, or SN74ALS35AN equivalent, this page provides verified functional identity, validated DC/AC electrical specs, confirmed package mapping, and real-world interface use cases - all derived from TI's official SDAS011C datasheet and packaging addendum.
Technical Context
The SN74ALS35AN implements six independent noninverting buffers (Y = A) with open-collector outputs requiring external pullup resistors. Its architecture supports active-low wired-OR and active-high wired-AND bus configurations, enabling shared-bus signaling without contention.
It operates across 0°C to 70°C with guaranteed VOL ≤ 0.5 V at IOL = 8 mA and tPHL/tPLH ranging 2–50 ns under CL = 50 pF and RL = 2 kΩ, making it suitable for TTL-compatible signal conditioning and legacy system interfacing where voltage-level flexibility is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL systems while tolerating rail variation. |
| Low-Level Output Current (IOL) | 8 mA - supports driving multiple TTL inputs or moderate-resistance pullups in wired-logic buses. |
| Propagation Delay (tPHL) | 2 ns (min) - enables high-speed signal buffering in critical timing paths of legacy digital systems. |
| Output Type | Open-collector - allows wired-OR connection, level translation beyond VCC, and bus arbitration. |
| Operating Temperature | 0°C to 70°C - rated for commercial-grade embedded and industrial control environments. |
| Input Thresholds (VIH/VIL) | VIH ≥ 2 V, VIL ≤ 0.8 V - matches standard TTL logic levels for seamless integration into 5 V logic families. |
| High-Level Output Voltage (VOH) | 5.5 V - achievable only with external pullup; enables interface to higher-voltage peripherals or mixed-supply domains. |
Pinout & Package
SN74ALS35AN is housed in a 14-pin plastic dual in-line package (PDIP, N package), 300-mil width, with 0.1-inch lead pitch and through-hole mounting. Pin 1 is marked by a notch or dot on the package body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Input (A1–A6) | Independent TTL-compatible logic inputs for each buffer stage. |
| 2, 4, 6, 8, 10, 12 | Output (Y1–Y6) | Open-collector outputs requiring external pullup; support wired-logic and level shifting. |
| 7 | GND | Ground reference for all internal circuitry and output sink paths. |
| 14 | VCC | Positive supply terminal (4.5–5.5 V); powers internal logic and defines output high-level ceiling when pulled up externally. |
Key Features
| Feature | Design Value |
|---|---|
| Hex noninverting buffer function | Six independent Y = A logic stages enable parallel signal conditioning without inversion overhead. |
| Open-collector outputs | Allow bus sharing via wired-OR, reduce component count in multi-driver systems, and support >5 V VOH with appropriate pullup. |
| TTL-compatible input thresholds | VIH ≥ 2 V and VIL ≤ 0.8 V ensure reliable recognition of standard 5 V logic signals without level translators. |
| Low propagation delay asymmetry | tPHL (2–14 ns) < tPLH (20–50 ns) - optimized for fast falling-edge response in timing-critical control paths. |
| Commercial temperature range | 0°C to 70°C operation supports cost-sensitive industrial and instrumentation designs without extended temp qualification. |
Applications
| Industrial Control Bus Interface | Legacy System Logic Level Translation |
|---|---|
|
Use Scenario: Interfacing microcontroller GPIOs to legacy PLC backplanes using shared interrupt lines. IC Role / Device Role / Timing Role: SN74ALS35AN acts as an open-collector driver enabling multiple controllers to assert a common active-low interrupt line via wired-OR. Use Value: Eliminates need for discrete diodes or additional logic gates while maintaining TTL-compatible drive strength and noise margin. |
Use Scenario: Adapting 5 V logic outputs to a 12 V sensor interface requiring active-high enable signals. IC Role / Device Role / Timing Role: SN74ALS35AN provides noninverting buffering with open-collector output, allowing external 12 V pullup to generate 12 V logic-high signals. Use Value: Enables direct level translation without dedicated level shifters or MOSFET-based solutions, reducing BOM count and layout area. |
| Wired-AND Power Sequencing Control | EPROM Address Bus Driver |
|
Use Scenario: Generating a global "power-good" signal only when all subsystems report readiness. IC Role / Device Role / Timing Role: SN74ALS35AN buffers individual "ready" signals and connects outputs in wired-AND configuration to produce active-high composite status. Use Value: Achieves fail-safe AND logic with zero gate delay addition and inherent short-circuit immunity due to open-collector topology. |
Use Scenario: Driving address lines of 27C512 EPROM in a vintage computer design with limited fanout. IC Role / Device Role / Timing Role: SN74ALS35AN strengthens weak microprocessor address signals before routing to EPROM inputs, ensuring setup/hold compliance. Use Value: Provides 8 mA sink capability and sub-50 ns propagation delay to meet EPROM access timing requirements under capacitive loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar noninverting open-collector buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS35N | Lower IOL (8 mA same), but higher VOL (0.5 V max vs. 0.4 V typ), slower tPHL (min 5 ns vs. 2 ns), and wider tPLH range (25–55 ns). | Compatible in static wired-OR functions but less suitable for high-speed edge-sensitive timing paths. | Prefer SN74ALS35AN where faster falling-edge response or tighter VOL tolerance is required. |
| SN74F35N | Higher speed (tPHL min 1.5 ns), but higher ICC (ICCL up to 10 mA), no guaranteed VOL spec at 8 mA, and narrower VCC range (4.5–5.5 V same). | Acceptable for speed-critical buffered outputs, but requires careful thermal and power budgeting in dense layouts. | Choose SN74ALS35AN for balanced speed, power, and output voltage predictability in commercial-temperature systems. |
Compared with SN74LS35N and SN74F35N, the SN74ALS35AN delivers superior tPHL performance and tighter VOL control at moderate power, making it optimal for legacy TTL bus interfaces where reliability and timing margin outweigh raw speed or ultra-low power.
Availability
SN74ALS35AN is available at Aetrix Electronics and suitable for industrial control bus interface, legacy system logic level translation, and EPROM address bus driving requiring stable component supply and long-term obsolescence management.
Supply support for SN74ALS35AN 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 communications product portfolios.
The SN74ALS35AN belongs to TI's ALS (Advanced Low-Power Schottky) logic family, designed for high-speed, low-power TTL-compatible digital interfacing in commercial-temperature applications where fanout, noise immunity, and wired-logic flexibility are essential.
FAQ
What is the primary logic function of the SN74ALS35AN?
The SN74ALS35AN performs six independent noninverting buffer functions (Y = A) with open-collector outputs. Each channel passes its input signal unchanged to the output, but the output stage lacks an internal pullup, requiring external resistor biasing. This architecture enables wired-OR and wired-AND configurations, and the SN74ALS35AN is commonly used in bus arbitration and level translation circuits where multiple drivers share a common line.
Does the SN74ALS35AN require external pullup resistors, and why?
Yes, the SN74ALS35AN requires external pullup resistors on all six open-collector outputs to establish a defined logic-high state. Because the output transistor can only sink current (not source), the pullup determines VOH level and rise time. The value depends on load capacitance and desired switching speed - typical values range from 1 kΩ to 10 kΩ. Without pullups, outputs remain floating or weakly pulled low, rendering the SN74ALS35AN nonfunctional in most applications.
Can the SN74ALS35AN be used in place of a standard 74LS07 hex buffer?
Yes, the SN74ALS35AN is a functional and pin-compatible replacement for the 74LS07 in most applications. Both are hex noninverting open-collector buffers in 14-pin PDIP packages with identical pinouts and TTL-compatible thresholds. However, the SN74ALS35AN offers faster tPHL (2 ns min vs. 5 ns min), lower VOL at full IOL, and improved power efficiency - advantages that make the SN74ALS35AN preferable in timing-critical or power-constrained legacy designs.
What is the maximum allowable supply voltage for the SN74ALS35AN?
The absolute maximum supply voltage (VCC) for the SN74ALS35AN is 7 V, per TI's SDAS011C datasheet. However, the recommended operating range is strictly 4.5 V to 5.5 V. Operating above 5.5 V may cause excessive current draw, thermal stress, or accelerated aging - even if below the 7 V absolute limit. For reliable long-term operation, the SN74ALS35AN must be powered within its recommended VCC window.
Is the SN74ALS35AN RoHS compliant, and what is its moisture sensitivity level?
Yes, the SN74ALS35AN is RoHS compliant, as confirmed in TI's Packaging Information Addendum. Since it uses a PDIP (N) package, it has no moisture sensitivity level (MSL) rating - MSL applies only to surface-mount packages subject to reflow soldering. The SN74ALS35AN is intended for through-hole assembly and does not require dry pack or baking prior to soldering.
SN74ALS35AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 6
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- Open Collector
- Current - Output High, Low:
- -, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
SN74ALS35AN FAQ
1.How can I place an order for SN74ALS35AN through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS35AN 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 SN74ALS35AN reliable?
The price and inventory of SN74ALS35AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS35AN is usually 5 days.
3.What payment methods are accepted for SN74ALS35AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS35AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS35AN?
SN74ALS35AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS35AN 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 SN74ALS35AN?
For technical support, including SN74ALS35AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS35AN requirements.
6.How does Aetrix verify that SN74ALS35AN is sourced from the original manufacturer or authorized distributors?
All SN74ALS35AN 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 SN74ALS35AN meets industry standards.
7.What is the process for return or replacement of SN74ALS35AN?
All SN74ALS35AN units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS35AN, 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 SN74ALS35AN part is unused and in its original packaging.
Return procedure for SN74ALS35AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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