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Texas Instruments CD74ACT241E
- Part No.:
- CD74ACT241E
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
CD74ACT241E.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:473
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Product details
Overview
CD74ACT241E from Texas Instruments is an octal 3-state buffer/line driver with dual independent output enables (one active-low, one active-high), designed for bus interface and data routing in industrial and embedded digital systems. It operates at 4.5–5.5 V, delivers ±24 mA output drive, supports 50-Ω transmission-line driving, and features balanced propagation delays (max 9.6 ns at 5 V) and low quiescent current (≤160 μA).
For engineers reviewing the CD74ACT241E datasheet, CD74ACT241E pinout, CD74ACT241E application, or CD74ACT241E equivalent, this page provides verified functional modes, thermal performance (RθJA = 40 °C/W in PDIP), truth-table behavior, and real-world implementation guidance for high-speed digital interfacing.
Technical Context
The CD74ACT241E implements two independent 4-bit banks (Bank 1: A0–A3 → Y0–Y3; Bank 2: A0–A3 → Y0–Y3), each controlled by its own output enable (1OE active-low, 2OE active-high). Its ACT-series TTL-compatible inputs accept 2.0 V VIH and 0.8 V VIL thresholds, ensuring robust noise immunity across the full −40°C to +85°C commercial-industrial range.
It uses RCA Advanced CMOS process technology with SCR-latch-up resistance, enabling reliable operation under transient stress. Output switching is characterized with 3 ns input rise/fall times and 50 pF load, delivering guaranteed tPZH/tPHZ ≤13.4 ns and tPLH/tPHL ≤9.6 ns over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with 5 V TTL logic families and stable operation across industrial voltage tolerances. |
| Output Drive Current | ±24 mA per output - sufficient to directly drive 50 Ω transmission lines or fan out to 15 FAST ICs without external buffers. |
| Propagation Delay | ≤9.6 ns max (tPLH/tPHL, VCC = 5 V, TA = −40°C to +85°C) - enables reliable timing in 100+ MHz bus applications with margin. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - provides TTL-level compatibility and 30% supply noise immunity at 5 V. |
| Quiescent Supply Current | ≤160 μA (max, TA = −40°C to +85°C) - minimizes standby power in battery-backed or energy-sensitive systems. |
| 3-State Leakage | ±10 μA max (VCC = 5.5 V, TA = −55°C to +125°C) - prevents bus contention and signal corruption during high-impedance state. |
| Power Dissipation Cap. | 71 pF typical - used to calculate dynamic power: PD = VCC² × fi × (CPD + CL) + VCC × ΔICC. |
Pinout & Package
CD74ACT241E is supplied in a 20-pin plastic dual in-line package (PDIP, N suffix), body size 24.33 mm × 6.35 mm, with through-hole mounting and industry-standard 0.3-inch width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low output enable (Bank 1) | Asserting low enables Y0–Y3 outputs; high places them in high-impedance state - allows bidirectional bus control with priority logic. |
| 2OE | Active-high output enable (Bank 2) | Asserting high enables Y0–Y3 outputs; low disables - enables asymmetric enable sequencing for staggered bus access. |
| 1A0–1A3 | Bank 1 data inputs | Directly drive corresponding Y0–Y3 outputs when 1OE is low - supports independent 4-bit data path routing. |
| 2A0–2A3 | Bank 2 data inputs | Drive second set of Y0–Y3 outputs when 2OE is high - enables dual-bank multiplexing without external logic. |
| 1Y0–1Y3 | Bank 1 buffered outputs | Inverting outputs relative to 1A0–1A3 only if configured as CD74ACT240; CD74ACT241 is non-inverting - confirmed by truth table. |
| 2Y0–2Y3 | Bank 2 buffered outputs | Non-inverting outputs relative to 2A0–2A3 - matches CD74ACT241 functional mode per Table 6-1. |
| GND (Pin 10) | Ground reference | Primary return path for all I/O and supply currents - must be low-impedance and decoupled near VCC. |
| VCC (Pin 20) | Positive supply | 5 V nominal supply; requires local 0.1 µF ceramic bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| SCR-latch-up-resistant CMOS process | Guarantees immunity to latch-up events under ESD or supply transients - critical for industrial environments with noisy power rails. |
| Balanced propagation delays | Minimizes skew between parallel outputs (e.g., Y0–Y3), enabling clean 4-bit bus transitions without added timing margins. |
| ±24 mA output drive | Eliminates need for external line drivers when interfacing to 50 Ω PCB traces or legacy TTL loads - reduces BOM count and board area. |
| TTL-compatible input thresholds | Accepts standard 5 V TTL logic levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V) without level-shifting - simplifies integration into mixed-logic systems. |
| Two independent 3-state controls | Enables flexible bus arbitration: e.g., 1OE manages CPU-to-peripheral writes while 2OE handles peripheral-to-CPU reads on shared data lines. |
Applications
| Industrial Bus Interface | Memory Address Latching |
|---|---|
Use Scenario: Isolating microcontroller address/data buses from multiple peripherals (ADCs, DACs, sensors) sharing a common 8-bit data bus. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer providing controlled bus access via independent OE signals to prevent contention. Use Value: Enables deterministic bus arbitration with <9.6 ns propagation delay and ±24 mA drive - eliminates need for discrete gate arrays or FPGA glue logic. |
Use Scenario: Latching 8-bit memory-mapped I/O addresses in PLC backplane designs where timing-critical address setup is required. IC Role / Device Role / Timing Role: Non-inverting octal buffer holding stable address bits during memory read/write cycles with minimal skew. Use Value: Balanced delays ensure simultaneous valid address assertion across all 8 bits - improves timing margin for 25 MHz memory access. |
| Legacy System Upgrades | Test Equipment Signal Routing |
Use Scenario: Replacing obsolete 74LS241 in aging test fixtures requiring higher speed and lower power than bipolar TTL. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement (PDIP-20) with identical pinout and function but ACT-series performance. Use Value: Delivers 3× faster propagation (vs. LS241) and 90% lower quiescent power - extends fixture lifetime without hardware redesign. |
Use Scenario: Routing calibrated digital stimulus signals between DUT ports and measurement instruments in automated test systems. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer isolating sensitive instrument inputs from DUT output loading variations. Use Value: 50 Ω transmission-line drive capability ensures signal integrity up to 100 MHz - avoids reflections and timing jitter in high-speed test paths. |
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 |
|---|---|---|---|
| SN74ACT241N | Identical electrical specs, same PDIP-20 package, identical pinout and truth table - manufactured by TI with identical ACT process. | No functional difference; SN74ACT241N is TI's current-generation part number with updated packaging and RoHS compliance documentation. | Select SN74ACT241N for new designs requiring latest TI lifecycle support and traceable sourcing; CD74ACT241E remains viable for legacy BOM continuity. |
| 74ACT241PC | Same AC/ACT family specs but from ON Semiconductor; minor variance in tPZH (12.2 ns vs. 13.4 ns) and RθJA (42 °C/W vs. 40 °C/W). | Valid for commercial-temp (0°C to +70°C) applications only - lacks extended industrial −40°C to +85°C rating of CD74ACT241E. | Choose 74ACT241PC only for cost-sensitive commercial equipment where ambient temperature stays within 0–70°C and thermal margin exceeds 5°C. |
Compared with SN74ACT241N and 74ACT241PC, CD74ACT241E offers guaranteed −40°C to +85°C operation, TI's long-term industrial support, and documented RθJA = 40 °C/W - making it optimal for ruggedized embedded systems where reliability and temperature margin are design-critical.
Availability
CD74ACT241E is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy system upgrades requiring stable component supply, long-lifecycle assurance, and proven field reliability in harsh thermal environments.
Supply support for CD74ACT241E 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 90 years of innovation in industrial-grade components.
CD74ACT241E belongs to TI's CD74ACT logic family, engineered for high-speed, low-power 5 V digital interfacing in industrial control, instrumentation, and avionics systems demanding robustness and long-term availability.
FAQ
What is the operating temperature range for CD74ACT241E?
The CD74ACT241E is rated for operation from −40°C to +85°C, meeting industrial temperature requirements. This range is explicitly specified in Section 4.2 "Recommended Operating Conditions" of the TI datasheet (SCHS287C), and applies to the PDIP (N) package variant. It is not rated for extended military −55°C to +125°C operation - that range applies only to the CD54ACT241F3A ceramic DIP variant.
Is CD74ACT241E pin-compatible with CD74AC241E?
Yes, CD74ACT241E and CD74AC241E share identical PDIP-20 pinouts and functional pin assignments (1OE, 2OE, A/Y banks), but differ electrically: CD74ACT241E requires 4.5–5.5 V and has TTL-compatible inputs, while CD74AC241E operates from 1.5–5.5 V with CMOS input thresholds. Swapping them requires verifying supply voltage and input logic levels in the target system.
Does CD74ACT241E support 50 Ω transmission-line driving?
Yes, CD74ACT241E is explicitly characterized for 50 Ω transmission-line driving per Section 4.5 "Electrical Characteristics: ACT Series", with guaranteed ±24 mA output drive at VCC = 4.5 V and TA = +85°C. This capability is validated by test condition (2) in footnote (2) of Table 4-5, confirming suitability for impedance-controlled PCB traces.
What is the maximum output enable/disable time for CD74ACT241E?
The maximum output enable time (tPZH) and disable time (tPHZ) for CD74ACT241E are both 13.4 ns at VCC = 5 V and TA = −40°C to +85°C, as specified in Table 4-7 "Switching Characteristics: ACT Series". These values apply to transitions from high-impedance to valid output (enable) and vice versa (disable).
How does the dual output-enable architecture (1OE active-low, 2OE active-high) benefit system design?
The asymmetric enable configuration of CD74ACT241E allows independent control of two 4-bit data paths using complementary logic states - for example, tying 1OE to a CPU write strobe (active-low) and 2OE to a read strobe (active-high) enables automatic direction control on a shared bus without additional gates or timing logic.
CD74ACT241E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
CD74ACT241E FAQ
1.How can I place an order for CD74ACT241E through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74ACT241E 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 CD74ACT241E reliable?
The price and inventory of CD74ACT241E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT241E is usually 5 days.
3.What payment methods are accepted for CD74ACT241E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT241E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74ACT241E?
CD74ACT241E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74ACT241E 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 CD74ACT241E?
For technical support, including CD74ACT241E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT241E requirements.
6.How does Aetrix verify that CD74ACT241E is sourced from the original manufacturer or authorized distributors?
All CD74ACT241E 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 CD74ACT241E meets industry standards.
7.What is the process for return or replacement of CD74ACT241E?
All CD74ACT241E units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT241E, 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 CD74ACT241E part is unused and in its original packaging.
Return procedure for CD74ACT241E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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