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Texas Instruments SN74ALS35ADR
- Part No.:
- SN74ALS35ADR
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74ALS35ADR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,774
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Product details
Overview
SN74ALS35ADR from Texas Instruments is a hex noninverting buffer with open-collector outputs, designed for wired-OR/AND logic interfacing in TTL-compatible systems. It operates at 4.5–5.5 V, delivers 8 mA low-level output current, exhibits 2–14 ns propagation delay (tPHL), and is rated for 0°C to 70°C operation - commonly used in address/data bus buffering and level translation.
For engineers reviewing the SN74ALS35ADR datasheet, SN74ALS35ADR pinout, SN74ALS35ADR application, or SN74ALS35ADR equivalent, key selection considerations include open-collector drive capability, TTL input compatibility, SOIC-14 package constraints, and required external pullup resistor design.
Technical Context
The SN74ALS35ADR implements six independent positive-logic buffers (Y = A) with open-collector outputs, requiring external pullup resistors to establish VOH. Its ALS (Advanced Low-Power Schottky) process enables lower power consumption than standard LS while maintaining compatible timing and voltage thresholds.
It supports active-low wired-OR and active-high wired-AND configurations via output wire-ANDing, and is electrically characterized for VIH ≥ 2 V, VIL ≤ 0.8 V, VOL ≤ 0.5 V at IOL = 8 mA, and ICCL up to 6.3 mA - confirming robust noise immunity and sink strength for legacy TTL system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Hex noninverter (Y = A), open-collector outputs - enables wired-logic sharing and level-flexible VOH generation |
| Supply Voltage (VCC) | 4.5 V to 5.5 V - ensures compatibility with 5 V TTL and mixed-voltage backplane interfaces |
| Output Sink Current (IOL) | 8 mA max at VOL ≤ 0.5 V - sufficient to drive multiple TTL inputs or LEDs without external amplification |
| Propagation Delay (tPHL/tPLH) | 2–14 ns / 20–50 ns - supports >10 MHz bus operation with predictable timing margins |
| Input Thresholds | VIH ≥ 2 V, VIL ≤ 0.8 V - guarantees reliable recognition of standard TTL logic levels |
| Operating Temperature | 0°C to 70°C - validated for commercial-grade industrial control and instrumentation environments |
Pinout & Package
SN74ALS35ADR is supplied in a 14-pin SOIC (D) package, 3.9 mm wide, 1.75 mm max height, with 1.27 mm pitch and JEDEC MS-012AB compliance. Pin 1 is marked by a beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A, 3A, 4A, 5A, 6A | Input | Independent TTL-compatible digital inputs driving respective buffer stages |
| 1Y, 2Y, 3Y, 4Y, 5Y, 6Y | Open-collector output | Active-low sinking outputs; require external pullup for logic HIGH assertion |
| Pin 7 | GND | Ground reference for all internal circuitry and output sinks |
| Pin 14 | VCC | Positive supply rail (4.5–5.5 V); powers all six buffer channels |
Key Features
| Feature | Design Value |
|---|---|
| ALS process technology | Reduces ICCL to 4.1–6.3 mA vs. standard LS, lowering system power in high-density bus applications |
| Wired-logic compatibility | Open-collector outputs support shared-bus wired-OR (active-low) or wired-AND (active-high) without additional logic gates |
| TTL input interface | VIH/VIL thresholds match legacy TTL families, enabling direct connection to 74LS/74F devices without level shifters |
| SOIC-14 packaging | Surface-mount footprint saves board space vs. PDIP; RoHS-compliant NIPDAU finish and MSL-1 rating simplify reflow assembly |
Applications
| Industrial Bus Buffering | Legacy System Level Translation |
|---|---|
Use Scenario: Isolating and driving address/data lines across multiple PCBs in programmable logic controllers (PLCs) with shared backplane wiring. IC Role / Device Role / Timing Role: Hex noninverting buffer providing current gain and open-collector flexibility for multi-drop bus arbitration. Use Value: Enables wired-OR interrupt signaling and eliminates contention risk during bus handshaking using single-line arbitration. |
Use Scenario: Interfacing modern microcontrollers with legacy TTL peripherals (e.g., 74LS244-based I/O expanders) operating at different VOH requirements. IC Role / Device Role / Timing Role: Level-translating buffer stage that raises VOH beyond standard TTL limits via configurable pullup voltage. Use Value: Allows 3.3 V MCU GPIOs to safely drive 5 V TTL loads while preserving signal integrity and timing predictability. |
| LED Driver Interface | Interrupt Aggregation Node |
Use Scenario: Driving multiple status indicator LEDs from a common microcontroller port where individual anode control is unnecessary. IC Role / Device Role / Timing Role: Current-sinking driver using open-collector outputs tied to LED anodes via shared VCC rail. Use Value: Delivers up to 8 mA per channel - sufficient for standard 2 mA LEDs - without discrete transistors or current-limiting resistors per channel. |
Use Scenario: Consolidating interrupt requests from multiple sensors or modules into a single active-low line connected to a CPU's IRQ pin. IC Role / Device Role / Timing Role: Wired-OR aggregator using multiple SN74ALS35ADR outputs tied together with one pullup resistor. Use Value: Guarantees interrupt assertion even if one source fails high; eliminates need for external OR gate or software polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS35N | Higher ICCL (12 mA typical), slower tPHL (15 ns min), same SOIC/PDIP footprint and pinout | Less suitable for power-constrained designs; marginally higher propagation delay affects tight-timing buses | Prefer SN74ALS35ADR when lower power or faster turn-off is required; SN74LS35N acceptable for cost-sensitive, non-critical timing use cases |
| SN74F35N | Faster tPHL (1.5 ns typ), higher IOL (20 mA), but significantly higher ICCL (22 mA) and no RoHS-compliant variant | Overkill for basic buffering; excessive power draw and heat in dense layouts; obsolete packaging | Select SN74ALS35ADR for balanced speed/power in new designs; reserve SN74F35N only for legacy repair or extreme-speed niche needs |
Compared with SN74LS35N and SN74F35N, the SN74ALS35ADR provides optimal tradeoff of speed (2 ns tPHL), power (4.1–6.3 mA ICCL), and manufacturability (RoHS, MSL-1 SOIC), making it the preferred choice for new commercial-grade embedded bus interfaces.
Availability
SN74ALS35ADR is available at Aetrix Electronics and suitable for industrial bus buffering, legacy system level translation, and interrupt aggregation requiring stable component supply and long-term production continuity.
Supply support for SN74ALS35ADR 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 for industrial, automotive, and communications markets.
The SN74ALS35ADR belongs to TI's legacy 74ALS logic family, engineered for high-speed, low-power TTL-compatible interfacing in commercial-temperature embedded control and instrumentation systems.
FAQ
What is the function of SN74ALS35ADR?
The SN74ALS35ADR is a hex noninverting buffer with open-collector outputs, implementing Y = A logic for each of six independent channels. It requires external pullup resistors on all outputs to generate valid HIGH logic levels. Its ALS process delivers improved speed-power balance over standard LS logic, and it is fully compatible with TTL input thresholds and output loading requirements.
Does SN74ALS35ADR support wired-OR logic?
Yes, the SN74ALS35ADR supports wired-OR logic through its open-collector outputs: connecting multiple outputs to a shared pullup resistor creates an active-low OR function. This configuration is widely used for interrupt aggregation and bus arbitration. The device's guaranteed 8 mA sink capability ensures reliable logic LOW assertion under loaded conditions.
What package type is SN74ALS35ADR supplied in?
SN74ALS35ADR is supplied exclusively in a 14-pin SOIC (D) package, measuring 8.55–8.75 mm × 3.8–4.0 mm with 1.27 mm lead pitch. It features RoHS-compliant NIPDAU lead finish and meets JEDEC MS-012AB mechanical standards. The part marking "ALS35A" appears on the top surface, and it carries MSL-1 rating for unlimited floor life at ≤30°C/60% RH.
Can SN74ALS35ADR operate at 3.3 V?
No, SN74ALS35ADR is not specified for 3.3 V operation. Its recommended VCC range is strictly 4.5 V to 5.5 V, and absolute maximum ratings limit supply voltage to 7 V. Operating below 4.5 V risks unreliable switching, increased VOL, and potential functional failure. For 3.3 V systems, consider TI's 74LVC series or level-shifting solutions instead of SN74ALS35ADR.
What is the maximum output sink current for SN74ALS35ADR?
The SN74ALS35ADR is rated for a maximum low-level output current (IOL) of 8 mA per channel, specified at VOL ≤ 0.5 V with VCC = 4.5 V. This value is guaranteed across the full 0°C to 70°C operating temperature range and ensures compatibility with standard TTL fanout requirements (e.g., driving up to 20 74LS inputs or multiple LEDs).
SN74ALS35ADR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALS
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN74ALS35ADR FAQ
1.How can I place an order for SN74ALS35ADR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALS35ADR 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 SN74ALS35ADR reliable?
The price and inventory of SN74ALS35ADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALS35ADR is usually 5 days.
3.What payment methods are accepted for SN74ALS35ADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALS35ADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALS35ADR?
SN74ALS35ADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALS35ADR 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 SN74ALS35ADR?
For technical support, including SN74ALS35ADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALS35ADR requirements.
6.How does Aetrix verify that SN74ALS35ADR is sourced from the original manufacturer or authorized distributors?
All SN74ALS35ADR 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 SN74ALS35ADR meets industry standards.
7.What is the process for return or replacement of SN74ALS35ADR?
All SN74ALS35ADR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALS35ADR, 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 SN74ALS35ADR part is unused and in its original packaging.
Return procedure for SN74ALS35ADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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