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Texas Instruments SN74HC241NSR
- Part No.:
- SN74HC241NSR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74HC241NSR.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,990
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Product details
Overview
SN74HC241NSR from Texas Instruments is an octal noninverting 3-state buffer/line driver IC designed for memory address, clock, and bus signal conditioning in industrial and embedded systems. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, features typical propagation delay of 11 ns (VCC = 4.5 V, CL = 50 pF), and draws ≤80 μA ICC max - enabling low-power, high-density bus interfacing in microcontroller peripherals and data acquisition subsystems.
For engineers reviewing the SN74HC241NSR datasheet, SN74HC241NSR pinout, SN74HC241NSR application, or SN74HC241NSR equivalent, this page provides verified functional mode behavior, SO package thermal metrics (RθJA = 113.4 °C/W), 3-state timing parameters (ten/tdis ≤32 ns at 6 V), and validated alternatives for memory address buffering, bus isolation, and clock distribution designs.
Technical Context
The SN74HC241NSR implements two independent 4-bit noninverting buffers, each with dedicated active-low (1OE) and active-high (2OE) output-enable controls. Its CMOS architecture ensures rail-to-rail input compatibility and high noise immunity across the full 2–6 V supply range.
Each buffer group transitions cleanly between logic-pass and high-impedance states without bus contention; outputs remain stable during enable transitions, and input leakage stays ≤1 μA - critical for battery-powered or mixed-voltage system interfaces where standby current and voltage translation integrity are design constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports direct interface with 3.3 V and 5 V logic families without level shifters. |
| Output Drive Capability | ±6 mA at 5 V - sufficient to drive 15 LSTTL loads or terminate short PCB traces without external buffering. |
| Propagation Delay (tpd) | 11 ns typical (VCC = 4.5 V, CL = 50 pF) - enables reliable operation in 20+ MHz bus clock domains. |
| Quiescent Current (ICC) | ≤80 μA max - minimizes static power in always-on control logic or sleep-mode subsystems. |
| 3-State Enable/Disable Time | ten/tdis ≤32 ns (VCC = 6 V) - ensures fast bus arbitration and prevents glitches during dynamic enable switching. |
| Input Leakage Current | ≤1 μA max - preserves signal integrity on high-impedance address lines and avoids unintended pull-up/down effects. |
| Thermal Resistance (RθJA) | 113.4 °C/W (SO package) - defines maximum power dissipation limit under natural convection for board-level thermal design. |
Pinout & Package
SN74HC241NSR uses a 20-pin SOP (Small Outline Package) with 15.00 mm × 5.30 mm body size, 1.27 mm lead pitch, and gull-wing leads compatible with standard reflow profiles (MSL Level-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Inputs | Noninverting data inputs for eight buffer channels; accept 2–6 V logic levels with ≤1 μA leakage. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Y1–Y8 Outputs | 3-state buffered outputs; high-impedance when corresponding OE is inactive, otherwise pass A-input logic state. |
| 17 | 1OE | Active-low output-enable for Y1–Y4; drives Y1–Y4 into high-Z when logic high. |
| 18 | GND | Ground reference for all internal circuitry and I/O; must be low-impedance connection. |
| 19 | VCC | Positive supply (2–6 V); requires local 0.1 μF bypass capacitor per TI layout guidelines. |
| 20 | 2OE | Active-high output-enable for Y5–Y8; drives Y5–Y8 into high-Z when logic low. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 2 V to 6 V operation allows seamless integration across 3.3 V microcontrollers and legacy 5 V peripheral buses. |
| Independent Output Control | Dual OE inputs (1OE low-active, 2OE high-active) enable selective activation of two 4-bit groups - ideal for segmented address/data bus management. |
| Low-Power 3-State Outputs | IOZ ≤5 μA max ensures minimal leakage current in high-Z state, preventing false reads on shared memory or I/O buses. |
| Fast Switching Performance | Typical tpd = 11 ns and tt ≤13 ns (VCC = 6 V) support clean edge transitions in high-speed digital control loops. |
| High Noise Immunity | VIH/VIL thresholds scale with VCC (e.g., VIH = 3.15 V at 4.5 V), maintaining robust logic margins across voltage variations. |
Applications
| Memory Address Buffering | Microcontroller Bus Isolation |
|---|---|
|
Use Scenario: Driving 16-bit address lines from an MCU to external SRAM or flash memory with fanout >10. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control synchronizes address latching and prevents bus contention during memory access cycles. Use Value: Enables single-cycle address setup/hold compliance and eliminates need for discrete pull-ups or additional drivers. |
Use Scenario: Isolating SPI or parallel I/O expansion ports between host MCU and peripheral modules sharing common data lines. IC Role / Device Role / Timing Role: Dual-group 3-state control allows time-multiplexed access to multiple peripherals without hardware switches or software delays. Use Value: Reduces PCB layer count by consolidating bus arbitration logic into one 20-pin SO package instead of discrete gates or multiplexers. |
| Industrial Clock Distribution | Legacy System Interface Adapter |
|
Use Scenario: Distributing a 10–25 MHz system clock to multiple FPGA configuration blocks or ADC sampling clocks in factory automation controllers. IC Role / Device Role / Timing Role: Low-skew, noninverting buffer with tight tpd matching (±2 ns typical) maintains clock phase alignment across endpoints. Use Value: Achieves sub-nanosecond inter-channel skew without requiring expensive clock buffers or custom layout compensation. |
Use Scenario: Interfacing modern 3.3 V SoCs with older 5 V industrial sensors or displays using TTL-compatible signaling. IC Role / Device Role / Timing Role: Voltage-tolerant input stage and programmable 3-state output act as bidirectional level translator and bus gate. Use Value: Eliminates need for separate level-shifting ICs while preserving timing integrity through guaranteed VIH/VIL thresholds at both supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT241NSR | CMOS input thresholds fixed at TTL levels (VIH = 2 V min), not VCC-scaled; identical pinout and SO package. | Better compatibility with legacy 5 V TTL logic sources; less suitable for mixed 3.3 V/5 V systems with variable VCC. | Select when interfacing exclusively with 5 V TTL outputs and strict VIH/VIL matching is required over supply flexibility. |
| 74LCX241MTCX | Lower VCC range (2.0–3.6 V), higher speed (tpd = 5.5 ns @ 3.3 V), and enhanced ESD protection (±2 kV HBM); TSSOP-20 package. | Optimized for 3.3 V-only portable or low-voltage industrial designs; incompatible with 5 V operation. | Choose for next-generation 3.3 V systems prioritizing speed and ESD robustness, accepting loss of 5 V interoperability. |
Compared with SN74HC241NSR, SN74HCT241NSR trades supply voltage flexibility for guaranteed TTL input compatibility, while 74LCX241MTCX sacrifices 5 V support to achieve faster switching and better ESD resilience in compact TSSOP packaging - making each alternative optimal only within its defined voltage and reliability envelope.
Availability
SN74HC241NSR is available at Aetrix Electronics and suitable for memory address buffering, microcontroller bus isolation, and industrial clock distribution requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long-life production programs.
Supply support for SN74HC241NSR 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 specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74HC241NSR belongs to TI's HC logic family - engineered for high noise immunity, low power, and broad supply compatibility in space-constrained, thermally demanding embedded control applications.
FAQ
What is the maximum operating temperature for SN74HC241NSR?
The SN74HC241NSR is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade range is validated per TI's recommended operating conditions and supported by thermal metrics including RθJA = 113.4 °C/W for the SO package. Derating is required above 70°C ambient if power dissipation exceeds 150 mW - consult TI's SCLS300E datasheet Section 5.3 for junction temperature calculations using SN74HC241NSR's actual load and layout conditions.
Does SN74HC241NSR support 3.3 V logic levels?
Yes, SN74HC241NSR fully supports 3.3 V operation: its supply range (2 V to 6 V) includes 3.3 V nominal, and input thresholds scale accordingly (VIH = 2.31 V min, VIL = 0.99 V max at VCC = 3.3 V). Outputs swing rail-to-rail, delivering ≥3.1 V VOH and ≤0.1 V VOL under 6 mA load - ensuring reliable interfacing with 3.3 V microcontrollers, FPGAs, and peripherals without level shifters.
How does the dual output-enable architecture of SN74HC241NSR improve system design?
The SN74HC241NSR's separate 1OE (active-low) and 2OE (active-high) inputs allow independent control of two 4-bit buffer groups (Y1–Y4 and Y5–Y8). This enables time-multiplexed bus access, segmented memory addressing, or fault-isolated peripheral control - reducing external logic and simplifying firmware state machines. For example, one group can hold address data while the other drives control signals, all within a single SN74HC241NSR device.
Can SN74HC241NSR replace SN74LS241 in existing designs?
SN74HC241NSR is a functional and pin-compatible upgrade to SN74LS241, offering identical pinout, 3-state behavior, and logic function but with CMOS advantages: lower ICC (80 μA vs. 30 mA), wider VCC range (2–6 V vs. 4.75–5.25 V), and higher noise immunity. However, LS-to-HC conversion requires verifying timing margins (tpd = 11 ns vs. ~25 ns for LS) and ensuring no legacy circuits depend on LS-specific output characteristics like higher sink current.
What decoupling capacitance is recommended for SN74HC241NSR?
Texas Instruments recommends a 0.1 μF ceramic capacitor placed as close as possible to the VCC pin (Pin 19) and GND (Pin 18) of SN74HC241NSR. This value is validated for noise suppression across the 2–6 V supply range and switching frequencies up to 25 MHz. For systems with high di/dt transients, paralleling with a 1 μF capacitor improves low-frequency ripple rejection - per TI's SCLS300E Section 8 and layout guidelines in Figure 9-1.
SN74HC241NSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
SN74HC241NSR FAQ
1.How can I place an order for SN74HC241NSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC241NSR 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 SN74HC241NSR reliable?
The price and inventory of SN74HC241NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC241NSR is usually 5 days.
3.What payment methods are accepted for SN74HC241NSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC241NSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC241NSR?
SN74HC241NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC241NSR 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 SN74HC241NSR?
For technical support, including SN74HC241NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC241NSR requirements.
6.How does Aetrix verify that SN74HC241NSR is sourced from the original manufacturer or authorized distributors?
All SN74HC241NSR 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 SN74HC241NSR meets industry standards.
7.What is the process for return or replacement of SN74HC241NSR?
All SN74HC241NSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC241NSR, 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 SN74HC241NSR part is unused and in its original packaging.
Return procedure for SN74HC241NSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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