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Texas Instruments CD74HCT241E
- Part No.:
- CD74HCT241E
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74HCT241E.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,239
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Product details
Overview
CD74HCT241E from Texas Instruments is a non-inverting octal buffer/line driver with three-state outputs, featuring one active-high (1OE) and one active-low (2OE) output enable control. It operates at 4.5 V to 5.5 V, delivers ±6 mA output drive per channel, supports –55°C to +125°C industrial temperature range, and exhibits 10 ns typical propagation delay at VCC = 5 V, CL = 15 pF. It is used in bidirectional bus interfacing and memory address/data line driving.
For engineers reviewing the CD74HCT241E datasheet, CD74HCT241E pinout, CD74HCT241E application, or CD74HCT241E equivalent, this page provides verified electrical specifications, functional pin mapping, thermal performance data, real-world use cases in bus buffering, and validated alternative parts for design flexibility and supply continuity.
Technical Context
The CD74HCT241E implements dual-gated, non-inverting buffer logic with independent output enable controls: 1OE (active-high) enables Y1–Y4, and 2OE (active-low) enables Y5–Y8. Its HCT logic family ensures TTL-compatible input thresholds (VIH = 2 V min, VIL = 0.8 V max) while maintaining CMOS-level power efficiency and noise immunity.
All eight outputs enter high-impedance state when their respective enable is inactive, allowing shared-bus operation without contention. Propagation delays are balanced across channels (tPLH ≈ tPHL), and transition times are tightly controlled (12–18 ns) to minimize signal distortion in high-speed digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | HCT - TTL-compatible inputs, CMOS power efficiency, 4.5–5.5 V operation |
| Propagation Delay | 10 ns typical at VCC = 5 V, CL = 15 pF - enables reliable 30+ MHz bus operation |
| Output Drive | ±6 mA per channel - sufficient to drive 15 LSTTL loads directly |
| Operating Temperature | –55°C to +125°C - qualified for aerospace, automotive, and industrial environments |
| Three-State Leakage | ±5 μA max at TA = –55°C to +125°C - ensures low standby current in high-impedance mode |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - guarantees robust interfacing with legacy TTL logic |
| Supply Current | 160 μA max ICC at TA = –55°C to +125°C - supports low-power system design |
Pinout & Package
CD74HCT241E is supplied in a 20-pin PDIP (Plastic Dual In-line Package) with 25.40 mm × 6.35 mm body size and 2.54 mm lead pitch. The package is through-hole mountable, RoHS-compliant (NIPDAU finish), and rated for manual and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Inputs A1–A8 | Non-inverting data inputs; buffered for noise immunity and fanout |
| 9, 10, 11, 12, 13, 14, 15, 16 | Outputs Y1–Y8 | Three-state outputs; Y1–Y4 controlled by 1OE, Y5–Y8 by 2OE |
| 17 | GND | Ground reference for all logic and I/O circuits |
| 18 | VCC | Positive supply rail (4.5–5.5 V); requires local 0.1 µF bypass capacitor |
| 19 | 1OE | Active-high output enable for Y1–Y4; drives outputs to high-Z when low |
| 20 | 2OE | Active-low output enable for Y5–Y8; drives outputs to high-Z when high |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent output enables | 1OE (active-high) and 2OE (active-low) allow asymmetric bus control and partial channel activation |
| High-current bus driver outputs | ±6 mA per output supports direct connection to 15 LSTTL loads without external buffers |
| TTL-compatible input thresholds | VIH ≥ 2.0 V and VIL ≤ 0.8 V ensure seamless integration with legacy 5 V TTL systems |
| Wide temperature operation | –55°C to +125°C rating enables deployment in under-hood automotive, avionics, and industrial control |
| Low dynamic power dissipation | CPD = 38 pF enables predictable power modeling: PD = VCC² × f × (CPD + CL) |
Applications
| Memory Address Buffering | Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Isolating and driving address lines between a microcontroller and external SRAM or EPROM. IC Role / Device Role / Timing Role: Non-inverting buffer with independent enables isolates address bus segments and prevents loading-induced timing skew. Use Value: 10 ns propagation delay and matched tPLH/tPHL ensure setup/hold timing margins are preserved across all eight address bits. |
Use Scenario: Expanding GPIO count of an MCU by adding parallel I/O via shared data bus. IC Role / Device Role / Timing Role: Three-state octal driver enables time-multiplexed access to multiple peripheral devices on a common data bus. Use Value: Independent 1OE/2OE controls allow selective activation of upper/lower nibbles without software overhead or additional logic. |
| Industrial PLC Backplane Interface | Test Equipment Signal Routing |
|
Use Scenario: Level-shifting and driving control signals across isolated backplane segments in programmable logic controllers. IC Role / Device Role / Timing Role: Robust 125°C-rated buffer provides galvanically isolated signal conditioning between CPU and I/O modules. Use Value: ±6 mA drive strength and –55°C to +125°C operation ensure reliable signal integrity in electrically noisy, thermally demanding enclosures. |
Use Scenario: Configurable routing of digital test vectors between pattern generator and DUT in automated test equipment. IC Role / Device Role / Timing Role: High-speed three-state buffer acts as programmable signal gate, enabling dynamic path selection under controller command. Use Value: 12–18 ns output transition times minimize jitter and edge uncertainty during high-frequency vector switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT241N | Identical pinout, same HCT logic family, identical 1OE/2OE architecture and electrical specs; manufactured by TI with identical qualification. | No functional difference; suitable for drop-in replacement where SN74HCT241N is already qualified in design. | Select when sourcing from TI's mainstream SN74 series distribution channels or requiring identical TI product traceability. |
| 74HCT241D | SOIC-20 package (6.5 mm × 4.4 mm), same logic function and specs, but surface-mount only; thermal resistance RθJA = 131.8°C/W vs. 84.6°C/W for PDIP. | Requires PCB redesign for SMT assembly; better suited for space-constrained, high-density layouts. | Select for new designs prioritizing board area reduction and automated assembly, provided thermal margin is verified. |
Compared with CD74HCT241E, SN74HCT241N offers identical performance and compatibility with no layout change, while 74HCT241D trades through-hole convenience for smaller footprint and higher thermal resistance-requiring careful thermal analysis in high-power-density applications.
Availability
CD74HCT241E is available at Aetrix Electronics and suitable for industrial control systems, aerospace avionics interfaces, and automotive engine control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CD74HCT241E 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, with over 50 years of innovation in high-reliability logic ICs.
The CD74HCT241E belongs to TI's CD74HCT high-speed CMOS logic family, designed specifically for robust 5 V system interfacing where TTL compatibility, wide temperature operation, and bus isolation are critical.
FAQ
What is the maximum output current per pin for CD74HCT241E?
The CD74HCT241E supports ±6 mA DC output current per channel under recommended operating conditions (VCC = 4.5–5.5 V, TA = –55°C to +125°C). This allows direct driving of up to 15 LSTTL loads per output without external buffering, making CD74HCT241E ideal for bus interface applications requiring strong drive capability and noise margin.
Does CD74HCT241E support operation at 3.3 V supply?
No, CD74HCT241E is specified only for 4.5 V to 5.5 V operation. Its HCT logic family uses TTL-compatible input thresholds that require minimum 2.0 V VIH and are not guaranteed below 4.5 V supply. For 3.3 V systems, consider CD74HC241E (2–6 V HC family) or SN74LVC241A (3.3 V LVC family) instead of CD74HCT241E.
How are the two output enables (1OE and 2OE) used in CD74HCT241E?
In CD74HCT241E, 1OE (pin 19) is active-high and controls outputs Y1–Y4, while 2OE (pin 20) is active-low and controls outputs Y5–Y8. This dual-enable architecture allows independent gating of two four-bit groups - for example, enabling upper/nibbles of a data bus separately or implementing partial bus arbitration without external logic. Both enables must be asserted to activate all eight outputs simultaneously.
What is the typical propagation delay of CD74HCT241E at 5 V?
The typical propagation delay of CD74HCT241E is 10 ns at VCC = 5 V, CL = 15 pF, and TA = 25°C, measured from input transition to valid output level. This value is consistent across both tPLH and tPHL, ensuring symmetrical timing behavior critical for synchronous bus applications where CD74HCT241E is commonly deployed.
Is CD74HCT241E RoHS compliant?
Yes, CD74HCT241E is RoHS compliant, with lead-free NIPDAU (Nickel/Palladium/Gold) terminal finish. It meets EU Directive 2011/65/EU requirements and is marked accordingly in TI's packaging documentation. The PDIP package contains no intentionally added lead, and all homogeneous materials comply with RoHS substance restrictions, confirming full compliance for CD74HCT241E.
CD74HCT241E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HCT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
CD74HCT241E FAQ
1.How can I place an order for CD74HCT241E through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74HCT241E 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 CD74HCT241E reliable?
The price and inventory of CD74HCT241E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74HCT241E is usually 5 days.
3.What payment methods are accepted for CD74HCT241E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74HCT241E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74HCT241E?
CD74HCT241E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74HCT241E 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 CD74HCT241E?
For technical support, including CD74HCT241E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74HCT241E requirements.
6.How does Aetrix verify that CD74HCT241E is sourced from the original manufacturer or authorized distributors?
All CD74HCT241E 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 CD74HCT241E meets industry standards.
7.What is the process for return or replacement of CD74HCT241E?
All CD74HCT241E units undergo pre-shipment inspection (PSI). If there is an issue with CD74HCT241E, 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 CD74HCT241E part is unused and in its original packaging.
Return procedure for CD74HCT241E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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