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Texas Instruments SN74S241N
- Part No.:
- SN74S241N
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74S241N.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,590
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Product details
Overview
SN74S241N from Texas Instruments is an octal non-inverting buffer/line driver with dual 4-bit channels, 3-state outputs, PNP inputs, and hysteresis-enhanced noise immunity. It operates at 5 V, delivers 64 mA sink current per output, achieves 7 ns typical propagation delay (tPLH/tPHL), and drives terminated lines down to 133 Ω - used in memory address buffering and bus repeater applications within telecom infrastructure and industrial control systems.
For engineers reviewing the SN74S241N datasheet, SN74S241N pinout, SN74S241N application, or SN74S241N equivalent, key selection criteria include its 3-state enable architecture, Schottky-transistor logic (S-TTL) speed-power trade-off, 0.4 V input hysteresis, compatibility with 3.3-V/5-V mixed-voltage buses, and PDIP-20 package thermal performance (RθJA = 50.6°C/W).
Technical Context
The SN74S241N implements two independent 4-bit non-inverting buffer channels (Channel 1: 1A1–1A4 → 1Y1–1Y4; Channel 2: 2A1–2A4 → 2Y1–2Y4), each controlled by a dedicated active-low output-enable input (1G, 2G/2G). Its S-TTL process enables faster switching than LS variants while maintaining TTL-compatible voltage thresholds.
Inputs feature PNP-based structures reducing DC loading on source buses, and built-in hysteresis (0.2–0.4 V) improves noise margin against ground bounce and crosstalk. Outputs are fully 3-state capable, supporting high-impedance isolation during power-up/down when G pins are pulled up to VCC via external resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75–5.25 V - ensures stable operation across commercial temperature range without regulator headroom compromise |
| Output Sink Current | 64 mA per Y output - sufficient to drive 50-Ω terminated transmission lines or multiple TTL loads |
| Propagation Delay | 6–9 ns (tPLH/tPHL, RL=90 Ω, CL=50 pF) - enables reliable timing in 100+ MHz bus environments |
| Input Hysteresis | 0.2–0.4 V - suppresses false triggering from slow-rising or noisy address/data signals |
| 3-State Leakage | ±50 µA (IOZH/IOZL) - minimizes bus contention current when outputs are disabled |
| DC Input Tolerance | Valid down to 2 V VIH - supports direct interfacing with 3.3-V logic without level shifters |
| Thermal Resistance | RθJA = 50.6°C/W (PDIP-20) - defines maximum power dissipation limit under still-air conditions |
Pinout & Package
SN74S241N is supplied in a 20-pin plastic dual in-line package (PDIP-N), measuring 24.33 mm × 6.35 mm, with 0.1-inch lead pitch and through-hole mounting. The package provides adequate thermal dissipation for continuous operation at full output drive in ambient temperatures up to +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1G | Channel 1 output-enable input | Active-low control: pulls all 1Y outputs to high-Z when logic HIGH |
| 1A1–1A4 | Channel 1 data inputs | Non-inverting inputs driving 1Y1–1Y4 respectively |
| 2G/2G | Channel 2 output-enable input | Dual-function pin labeled 2G on SN74S241; active-low enable for 2Y outputs |
| 2A1–2A4 | Channel 2 data inputs | Non-inverting inputs driving 2Y1–2Y4 respectively |
| 1Y1–1Y4 | Channel 1 buffered outputs | 3-state non-inverting outputs corresponding to 1A1–1A4 |
| 2Y1–2Y4 | Channel 2 buffered outputs | 3-state non-inverting outputs corresponding to 2A1–2A4 |
| VCC (Pin 20) | Positive supply | 5-V power rail; decoupling capacitor required within 1 cm of pin |
| GND (Pin 10) | Ground reference | Common return path for all I/O and internal circuitry |
Key Features
| Feature | Design Value |
|---|---|
| PNP input structure | Reduces input DC loading to ≤400 µA per A-input, minimizing bus loading in fan-out-critical designs |
| Input hysteresis | 0.2–0.4 V threshold separation improves noise immunity on long PCB traces or shared backplanes |
| 3-state output control | Independent 1G and 2G enables allow selective channel isolation without affecting adjacent data paths |
| Schottky-clamped outputs | Prevents saturation delay, enabling 7 ns typical tPLH/tPHL - critical for high-speed memory address latching |
| Mixed-voltage interface | 2-V minimum VIH accepts 3.3-V logic levels directly, eliminating external level translators in hybrid systems |
Applications
| Memory Address Buffering | Bus Repeater / Level Restoration |
|---|---|
Use Scenario: Driving 20-bit memory address bus from microprocessor to multiple SRAM/ROM chips across 10-cm PCB trace. IC Role / Device Role / Timing Role: Non-inverting octal buffer isolating CPU address outputs and boosting drive strength to overcome capacitive loading. Use Value: Enables reliable 100-MHz address strobing with <9 ns propagation delay and 64-mA sink capability per line. | Use Scenario: Restoring degraded TTL signal integrity on a 30-cm daisy-chained backplane carrying control signals between modules. IC Role / Device Role / Timing Role: Active repeater regenerating logic levels and edge rates using dual-channel 3-state isolation. Use Value: Recovers signal amplitude and slew rate while suppressing noise via 0.4-V hysteresis and low-output-impedance drive. |
| Telecom Line Interface | Industrial I/O Expansion |
Use Scenario: Interfacing FPGA GPIO bank to legacy TTL-based line card controllers in carrier-grade switches. IC Role / Device Role / Timing Role: Voltage-level translator and bus driver bridging 3.3-V FPGA outputs to 5-V peripheral logic. Use Value: Eliminates need for discrete level shifters; 2-V VIH tolerance ensures robust logic recognition despite supply droop. | Use Scenario: Expanding PLC digital input capacity by conditioning and buffering 8-channel sensor signals before ADC sampling. IC Role / Device Role / Timing Role: Signal conditioner providing ESD-tolerant (500-V HBM) input protection and noise-filtered buffering. Use Value: 400-mV noise margin and PNP input structure reject common-mode transients induced by motor switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal non-inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS241N | Slower tPLH/tPHL (12–18 ns), lower IOL (24 mA), higher ICC (27–46 mA), LS-TTL process | Better suited for low-power, noise-immune applications where speed <10 MHz is acceptable | Choose SN74LS241N when thermal budget is constrained and propagation delay >12 ns is tolerable |
| SN74ALS241N | Advanced LS variant: 10 ns max tPLH/tPHL, 24 mA IOL, 19 mA ICC, improved noise margin | Offers better speed/power balance than LS but less drive than S-series; not rated for 133-Ω line drive | Choose SN74ALS241N for moderate-speed systems requiring lower static power than SN74S241N |
Compared with SN74LS241N and SN74ALS241N, SN74S241N delivers the highest output drive (64 mA) and fastest switching (6–9 ns), making it optimal for high-speed bus loading and terminated line applications - though at the cost of higher quiescent current (95–160 mA) and thermal demand.
Availability
SN74S241N is available at Aetrix Electronics and suitable for telecom infrastructure, industrial I/O expansion, memory address buffering, and bus repeater applications requiring stable component supply across extended production lifecycles.
Supply support for SN74S241N 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
SN74S241N belongs to TI's legacy TTL logic family designed for high-drive, noise-resilient bus interfacing in industrial control, telecom, and computing systems where reliability and deterministic timing are critical.
FAQ
What is the maximum operating temperature for SN74S241N?
The SN74S241N is rated for commercial temperature operation from 0°C to +70°C. Its PDIP-20 package exhibits a junction-to-ambient thermal resistance (RθJA) of 50.6°C/W; sustained operation near the upper limit requires attention to PCB copper area and airflow. Exceeding +70°C risks parametric shift in VOH/VOL and increased ICC, per TI's SDLS144D specification.
Does SN74S241N support 3.3-V logic inputs?
Yes, SN74S241N supports 3.3-V logic inputs directly: its minimum high-level input voltage (VIH) is specified at 2.0 V under recommended operating conditions, well below typical 3.3-V CMOS logic high levels (~3.0–3.3 V). This eliminates the need for external level-shifting circuitry when interfacing with modern FPGAs or microcontrollers.
How should the 1G and 2G/2G pins be handled during power-up?
To ensure outputs remain in high-impedance state during power-up and power-down, both 1G and 2G/2G pins must be tied to VCC via pullup resistors. TI recommends minimum resistor values based on the driver's current-sinking capability; for SN74S241N, a 10-kΩ pullup is commonly used to guarantee reliable disable before VCC stabilizes.
Can SN74S241N drive a 50-Ω transmission line?
Yes, SN74S241N can drive a 50-Ω terminated line: its datasheet explicitly states it "can be used to drive terminated lines down to 133 Ω", and with 64 mA sink capability and Schottky-clamped outputs, it meets the current and edge-rate requirements for short 50-Ω traces. For longer runs, impedance matching and termination layout remain essential.
What is the purpose of input hysteresis in SN74S241N?
The input hysteresis (0.2–0.4 V) in SN74S241N increases the difference between VIH and VIL thresholds, preventing multiple output transitions caused by slow-rising or noisy input waveforms - especially critical in electrically noisy industrial environments or on long, unterminated PCB traces where ringing or ground bounce occurs.
SN74S241N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74S
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 15mA, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74S241N FAQ
1.How can I place an order for SN74S241N through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74S241N 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 SN74S241N reliable?
The price and inventory of SN74S241N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74S241N is usually 5 days.
3.What payment methods are accepted for SN74S241N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74S241N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74S241N?
SN74S241N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74S241N 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 SN74S241N?
For technical support, including SN74S241N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74S241N requirements.
6.How does Aetrix verify that SN74S241N is sourced from the original manufacturer or authorized distributors?
All SN74S241N 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 SN74S241N meets industry standards.
7.What is the process for return or replacement of SN74S241N?
All SN74S241N units undergo pre-shipment inspection (PSI). If there is an issue with SN74S241N, 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 SN74S241N part is unused and in its original packaging.
Return procedure for SN74S241N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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