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Texas Instruments SN74HC241PWT
- Part No.:
- SN74HC241PWT
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC241PWT.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,861
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Product details
Overview
SN74HC241PWT from Texas Instruments is an octal noninverting buffer/line driver with dual 3-state outputs, designed for memory address and bus driving in industrial control and embedded systems. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, exhibits typical propagation delay of 11 ns (VCC = 4.5 V, CL = 50 pF), and draws ≤80 μA ICC at 6 V.
For engineers reviewing the SN74HC241PWT datasheet, SN74HC241PWT pinout, SN74HC241PWT application, or SN74HC241PWT equivalent, this page provides verified functional mode behavior, thermal resistance (RθJA = 131.8 °C/W), 3-state timing parameters (ten/tdis ≤32 ns at 6 V), and package-specific layout guidance for TSSOP-20.
Technical Context
The SN74HC241PWT implements two independent 4-bit noninverting buffers, each with dedicated output-enable inputs (1OE and 2OE). When 1OE is low or 2OE is high, data passes transparently from A inputs to Y outputs; when 1OE is high or 2OE is low, the corresponding Y outputs enter high-impedance state. This architecture enables bidirectional bus control and memory address latching without inversion.
It uses standard CMOS silicon process with Schmitt-trigger–free inputs, supports LSTTL load compatibility (up to 15 loads), and maintains rail-to-rail output swing (VOH ≥ 4.4 V, VOL ≤ 0.33 V at 4.5 V, IOL = 6 mA). Input leakage remains ≤1 μA across full voltage range, ensuring low static power in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 6 V - Enables direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Output Drive | ±6 mA at 5 V - Sufficient to drive 15 LSTTL loads, supporting legacy TTL bus termination schemes. |
| Propagation Delay | 11 ns typical (VCC = 4.5 V, CL = 50 pF) - Meets timing budgets for sub-30 MHz address/data strobing in microcontroller peripherals. |
| Quiescent Current | ≤80 μA at 6 V - Enables use in low-power sleep modes where supply rails remain active. |
| 3-State Enable Time | ≤32 ns (tdis/ten at 6 V) - Ensures clean bus release before next cycle in synchronous memory interfaces. |
| Input Leakage | ≤1 μA max - Prevents unintended biasing of floating control lines in unpowered subsystems. |
| Thermal Resistance | RθJA = 131.8 °C/W (TSSOP-20) - Requires minimal copper area for thermal management in compact PCB layouts. |
Pinout & Package
TSSOP-20 package (6.50 mm × 4.40 mm, 1.2 mm max height), lead pitch 0.65 mm, RoHS-compliant NiPdAu finish, MSL Level-1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Inputs | Noninverting data inputs for eight buffer channels; tied to GND or VCC if unused per TI SCBA004. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Y1–Y8 Outputs | 3-state buffered outputs; high-impedance when respective OE is inactive - enables shared bus arbitration. |
| 17 | GND | Ground reference for all logic and power paths; requires low-inductance connection to PCB ground plane. |
| 18 | VCC | Power supply input (2–6 V); must be bypassed with 0.1 μF ceramic capacitor placed ≤2 mm from pin. |
| 19 | 1OE | Active-low enable for first 4-bit buffer (Y1–Y4); low = enabled, high = high-Z - supports independent group control. |
| 20 | 2OE | Active-high enable for second 4-bit buffer (Y5–Y8); high = enabled, low = high-Z - complements 1OE for asymmetric gating. |
Key Features
| Feature | Design Value |
|---|---|
| Wide supply range | 2 V to 6 V operation allows single-supply interoperability across 3.3 V microcontrollers and 5 V peripheral buses. |
| High-current 3-state outputs | ±6 mA drive at 5 V ensures robust signal integrity on loaded backplanes or long traces without external drivers. |
| Low quiescent power | 80 μA max ICC enables integration into always-on monitoring circuits without compromising system battery life. |
| Fast switching performance | 11 ns typical tpd and ≤32 ns 3-state transition times support reliable operation up to 25 MHz clock domains. |
| Bus-compatible 3-state control | Dual independent OE inputs (1OE low-active, 2OE high-active) allow flexible partitioning of 8-bit data paths in memory-mapped I/O. |
Applications
| Industrial PLC I/O Expansion | Microcontroller Address Bus Buffering |
|---|---|
|
Use Scenario: Expanding digital I/O count in programmable logic controllers using parallel port expansion chips. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer isolating CPU address/data bus from modular I/O racks during configuration writes. Use Value: Enables hot-swappable module detection via controlled bus release (tdis ≤32 ns) and prevents contention during firmware updates. |
Use Scenario: Driving 8-bit address lines from an 8051 or ARM Cortex-M0+ microcontroller to external SRAM or flash memory. IC Role / Device Role / Timing Role: Noninverting address latch buffer with independent enable control for memory bank selection. Use Value: Delivers 11 ns tpd and ±6 mA drive to meet 70 ns access time requirements of 120 ns SRAM devices at 5 V. |
| Legacy Instrumentation Bus Interface | Test Equipment Signal Routing |
|
Use Scenario: Interfacing modern MCU-based controllers to GPIB or IEEE-488 bus transceivers requiring TTL-level handshaking signals. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer for STB, ATN, and DAV control lines with 3-state isolation during bus arbitration. Use Value: 2–6 V supply range accommodates mixed-voltage test fixtures; RθJA = 131.8 °C/W permits operation in sealed enclosures without forced air. |
Use Scenario: Routing stimulus signals between FPGA pattern generators and DUT pins in automated test equipment (ATE) platforms. IC Role / Device Role / Timing Role: Programmable signal gate enabling/disabling of 8-channel analog/digital stimulus paths under software control. Use Value: Dual OE inputs allow synchronized activation of grouped channels (e.g., Y1–Y4 for analog, Y5–Y8 for digital) with no timing skew. |
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 |
|---|---|---|---|
| SN74HCT241PW | CMOS input thresholds optimized for TTL-compatible 5 V logic (VIH = 2 V min); identical pinout and function. | Better noise immunity in noisy industrial environments with marginal 5 V supply regulation. | Select when interfacing directly to legacy 74LS/74ALS logic families without level translation. |
| 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). | Optimized for 3.3 V-only systems with tighter timing margins and portable equipment ESD requirements. | Choose for new 3.3 V designs requiring faster settling and improved robustness over SN74HC241PWT. |
Compared with SN74HC241PWT, SN74HCT241PW offers superior 5 V TTL compatibility but lacks 2–3.3 V operation, while 74LCX241MTCX delivers higher speed and lower voltage support at the cost of reduced 5 V tolerance - both require validation of OE polarity mapping in existing firmware.
Availability
SN74HC241PWT is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded memory interface applications requiring stable component supply and long-term manufacturing continuity.
Supply support for SN74HC241PWT 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 connectivity technologies, with over 90 years of innovation in industrial and automotive electronics.
The SN74HC241PWT belongs to TI's 74HC logic family, engineered for high noise immunity, low power consumption, and seamless interoperability across mixed-voltage digital systems in harsh operating environments.
FAQ
What is the maximum operating temperature for SN74HC241PWT?
The SN74HC241PWT is rated for operation from –40 °C to +85 °C ambient temperature. Its TSSOP-20 package has a junction-to-ambient thermal resistance of 131.8 °C/W, so internal die temperature must remain below 150 °C under worst-case power dissipation - design derating is recommended for continuous 85 °C ambient use.
Does SN74HC241PWT support 3.3 V logic levels?
Yes, SN74HC241PWT fully supports 3.3 V operation: VIH is 2.0 V min (at VCC = 3.3 V), VOL is ≤0.33 V (IOL = 6 mA), and VOH is ≥2.97 V (IOH = –6 mA). Its 2–6 V supply range makes it compatible with both 3.3 V and 5 V logic families without external level shifters.
How are the output-enable inputs configured on SN74HC241PWT?
SN74HC241PWT has two independent output-enable inputs: Pin 19 (1OE) is active-low for Y1–Y4, and Pin 20 (2OE) is active-high for Y5–Y8. This asymmetry allows flexible grouping - for example, asserting 1OE low while holding 2OE low disables only Y1–Y4, leaving Y5–Y8 in high-Z state.
Can unused inputs on SN74HC241PWT be left floating?
No - all unused inputs on SN74HC241PWT must be tied to VCC or GND per TI application report SCBA004. Floating CMOS inputs cause increased ICC, erratic switching, and potential device damage due to partial conduction in input-stage transistors. Unused A inputs should be terminated to avoid undefined states.
What is the recommended bypass capacitor for SN74HC241PWT?
Texas Instruments recommends a 0.1 μF ceramic capacitor placed within 2 mm of the VCC pin (Pin 18) and GND (Pin 17) for SN74HC241PWT. For systems with high-frequency noise, paralleling with a 1 μF capacitor improves broadband suppression - both must use short, low-inductance traces to the power pins.
SN74HC241PWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-TSSOP
SN74HC241PWT FAQ
1.How can I place an order for SN74HC241PWT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC241PWT 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 SN74HC241PWT reliable?
The price and inventory of SN74HC241PWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC241PWT is usually 5 days.
3.What payment methods are accepted for SN74HC241PWT?
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4.How is shipping managed for SN74HC241PWT?
SN74HC241PWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC241PWT 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 SN74HC241PWT?
For technical support, including SN74HC241PWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC241PWT requirements.
6.How does Aetrix verify that SN74HC241PWT is sourced from the original manufacturer or authorized distributors?
All SN74HC241PWT 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 SN74HC241PWT meets industry standards.
7.What is the process for return or replacement of SN74HC241PWT?
All SN74HC241PWT units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC241PWT, 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 SN74HC241PWT part is unused and in its original packaging.
Return procedure for SN74HC241PWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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